Pysim more algorithms (#5644)
Summary: This PR adds four more eviction policies. - OPT [1] - Hyperbolic caching [2] - ARC [3] - GreedyDualSize [4] [1] L. A. Belady. 1966. A Study of Replacement Algorithms for a Virtual-storage Computer. IBM Syst. J. 5, 2 (June 1966), 78-101. DOI=http://dx.doi.org/10.1147/sj.52.0078 [2] Aaron Blankstein, Siddhartha Sen, and Michael J. Freedman. 2017. Hyperbolic caching: flexible caching for web applications. In Proceedings of the 2017 USENIX Conference on Usenix Annual Technical Conference (USENIX ATC '17). USENIX Association, Berkeley, CA, USA, 499-511. [3] Nimrod Megiddo and Dharmendra S. Modha. 2003. ARC: A Self-Tuning, Low Overhead Replacement Cache. In Proceedings of the 2nd USENIX Conference on File and Storage Technologies (FAST '03). USENIX Association, Berkeley, CA, USA, 115-130. [4] N. Young. The k-server dual and loose competitiveness for paging. Algorithmica, June 1994, vol. 11,(no.6):525-41. Rewritten version of ''On-line caching as cache size varies'', in The 2nd Annual ACM-SIAM Symposium on Discrete Algorithms, 241-250, 1991. Pull Request resolved: https://github.com/facebook/rocksdb/pull/5644 Differential Revision: D16548817 Pulled By: HaoyuHuang fbshipit-source-id: 838f76db9179f07911abaab46c97e1c929cfcd63
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haoyuhuang
Facebook Github Bot
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@ -10,6 +10,10 @@
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# warmup_seconds: The number of seconds used for warmup.
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# max_jobs: The max number of concurrent pysims to run.
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# Install required packages to run simulations.
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# sudo dnf install -y numpy scipy python-matplotlib ipython python-pandas sympy python-nose atlas-devel
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ulimit -c 0
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if [ $# -ne 5 ]; then
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echo "Usage: ./block_cache_pysim.sh trace_file_path result_dir downsample_size warmup_seconds max_jobs"
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exit 0
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@ -20,17 +24,26 @@ result_dir="$2"
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downsample_size="$3"
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warmup_seconds="$4"
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max_jobs="$5"
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current_jobs=0
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max_num_accesses=100000000
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current_jobs=1
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ml_tmp_result_dir="$result_dir/ml"
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rm -rf "$ml_tmp_result_dir"
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mkdir -p "$result_dir"
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mkdir -p "$ml_tmp_result_dir"
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for cache_type in "ts" "linucb" "ts_hybrid" "linucb_hybrid"
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# Report miss ratio in the trace.
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current_jobs=$(ps aux | grep pysim | grep python | grep -cv grep)
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for cf_name in "all"
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do
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for cache_size in "16M" "256M" "1G" "2G" "4G" "8G" "12G" "16G"
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for cache_size in "1G" "2G" "4G" "8G" "16G" #"12G" "16G" "1T"
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do
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for cache_type in "opt" "lru" "pylru" "pycctbbt" "pyhb" "ts" "trace" "lru_hybrid" #"pycctblevelbt" #"lru_hybridn" "opt" #"pylru" "pylru_hybrid" "pycctbbt" "pycccfbt" "trace"
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do
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if [[ $cache_type == "trace" && $cache_size != "16G" ]]; then
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# We only need to collect miss ratios observed in the trace once.
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continue
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fi
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while [ "$current_jobs" -ge "$max_jobs" ]
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do
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sleep 10
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@ -38,12 +51,13 @@ do
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current_jobs=$(ps aux | grep pysim | grep python | grep -cv grep)
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echo "Waiting jobs to complete. Number of running jobs: $current_jobs"
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done
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output="log-ml-$cache_type-$cache_size"
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echo "Running simulation for $cache_type and cache size $cache_size. Number of running jobs: $current_jobs. "
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nohup python block_cache_pysim.py "$cache_type" "$cache_size" "$downsample_size" "$warmup_seconds" "$trace_file" "$ml_tmp_result_dir" >& $ml_tmp_result_dir/$output &
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output="log-ml-$cache_type-$cache_size-$cf_name"
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echo "Running simulation for $cache_type, cache size $cache_size, and cf_name $cf_name. Number of running jobs: $current_jobs. "
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nohup python block_cache_pysim.py "$cache_type" "$cache_size" "$downsample_size" "$warmup_seconds" "$trace_file" "$ml_tmp_result_dir" "$max_num_accesses" "$cf_name" >& "$ml_tmp_result_dir/$output" &
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current_jobs=$((current_jobs+1))
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done
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done
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done
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# Wait for all jobs to complete.
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while [ $current_jobs -gt 0 ]
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@ -57,14 +71,14 @@ done
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echo "Combine individual pysim output files"
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rm -rf "$result_dir/ml_*"
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mrc_file="$result_dir/ml_mrc"
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for header in "header-" "data-"
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do
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for fn in $ml_tmp_result_dir/*
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for fn in "$ml_tmp_result_dir"/*
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do
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sum_file=""
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time_unit=""
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capacity=""
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target_cf_name=""
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if [[ $fn == *"timeline"* ]]; then
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tmpfn="$fn"
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IFS='-' read -ra elements <<< "$tmpfn"
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@ -79,24 +93,43 @@ do
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done
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time_unit_index=$((time_unit_index+1))
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capacity_index=$((time_unit_index+2))
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target_cf_name_index=$((time_unit_index+3))
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time_unit="${elements[$time_unit_index]}_"
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capacity="${elements[$capacity_index]}_"
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target_cf_name="${elements[$target_cf_name_index]}_"
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fi
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if [[ $fn == "${header}ml-policy-timeline"* ]]; then
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sum_file="$result_dir/ml_${capacity}${time_unit}policy_timeline"
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if [[ $fn == *"${header}ml-policy-timeline"* ]]; then
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sum_file="$result_dir/ml_${target_cf_name}${capacity}${time_unit}policy_timeline"
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fi
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if [[ $fn == "${header}ml-policy-ratio-timeline"* ]]; then
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sum_file="$result_dir/ml_${capacity}${time_unit}policy_ratio_timeline"
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if [[ $fn == *"${header}ml-policy-ratio-timeline"* ]]; then
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sum_file="$result_dir/ml_${target_cf_name}${capacity}${time_unit}policy_ratio_timeline"
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fi
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if [[ $fn == "${header}ml-miss-timeline"* ]]; then
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sum_file="$result_dir/ml_${capacity}${time_unit}miss_timeline"
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if [[ $fn == *"${header}ml-miss-timeline"* ]]; then
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sum_file="$result_dir/ml_${target_cf_name}${capacity}${time_unit}miss_timeline"
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fi
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if [[ $fn == "${header}ml-miss-ratio-timeline"* ]]; then
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sum_file="$result_dir/ml_${capacity}${time_unit}miss_ratio_timeline"
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if [[ $fn == *"${header}ml-miss-ratio-timeline"* ]]; then
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sum_file="$result_dir/ml_${target_cf_name}${capacity}${time_unit}miss_ratio_timeline"
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fi
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if [[ $fn == "${header}ml-mrc"* ]]; then
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sum_file="$mrc_file"
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if [[ $fn == *"${header}ml-mrc"* ]]; then
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tmpfn="$fn"
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IFS='-' read -ra elements <<< "$tmpfn"
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target_cf_name=${elements[-1]}
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sum_file="${result_dir}/ml_${target_cf_name}_mrc"
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fi
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if [[ $fn == *"${header}ml-avgmb"* ]]; then
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tmpfn="$fn"
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IFS='-' read -ra elements <<< "$tmpfn"
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time_unit=${elements[3]}
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target_cf_name=${elements[-1]}
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sum_file="${result_dir}/ml_${time_unit}_${target_cf_name}_avgmb"
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fi
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if [[ $fn == *"${header}ml-p95mb"* ]]; then
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tmpfn="$fn"
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IFS='-' read -ra elements <<< "$tmpfn"
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time_unit=${elements[3]}
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target_cf_name=${elements[-1]}
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sum_file="${result_dir}/ml_${time_unit}_${target_cf_name}_p95mb"
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fi
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if [[ $sum_file == "" ]]; then
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continue
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@ -106,13 +139,18 @@ do
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continue
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fi
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fi
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cat "$ml_tmp_result_dir/$fn" >> "$sum_file"
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cat "$fn" >> "$sum_file"
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done
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done
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echo "Done"
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# Sort MRC file by cache_type and cache_size.
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tmp_file="$result_dir/tmp_mrc"
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cat "$mrc_file" | sort -t ',' -k1,1 -k4,4n > "$tmp_file"
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cat "$tmp_file" > "$mrc_file"
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rm -rf "$tmp_file"
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for fn in $result_dir/*
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do
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if [[ $fn == *"_mrc" || $fn == *"_avgmb" || $fn == *"_p95mb" ]]; then
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# Sort MRC file by cache_type and cache_size.
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tmp_file="$result_dir/tmp_mrc"
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cat "$fn" | sort -t ',' -k1,1 -k4,4n > "$tmp_file"
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cat "$tmp_file" > "$fn"
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rm -rf "$tmp_file"
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fi
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done
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@ -1,17 +1,30 @@
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#!/usr/bin/env python3
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# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
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import os
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import random
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import sys
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from block_cache_pysim import (
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ARCCache,
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CacheEntry,
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GDSizeCache,
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HashTable,
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HyperbolicPolicy,
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LFUPolicy,
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LinUCBCache,
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LRUCache,
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LRUPolicy,
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MRUPolicy,
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OPTCache,
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OPTCacheEntry,
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ThompsonSamplingCache,
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TraceCache,
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TraceRecord,
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create_cache,
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kMicrosInSecond,
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kSampleSize,
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run,
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)
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@ -33,30 +46,44 @@ def test_hash_table():
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records = 100
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for i in range(n):
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key_id = random.randint(0, records)
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v = random.randint(0, records)
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key = "k{}".format(key_id)
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value = "v{}".format(key_id)
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action = random.randint(0, 2)
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# print "{}:{}:{}".format(action, key, value)
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value = CacheEntry(v, v, v, v, v, v, v)
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action = random.randint(0, 10)
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assert len(truth_map) == table.elements, "{} {} {}".format(
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len(truth_map), table.elements, i
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)
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if action == 0:
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table.insert(key, key_id, value)
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truth_map[key] = value
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elif action == 1:
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if action <= 8:
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if key in truth_map:
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assert table.lookup(key, key_id) is not None
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assert truth_map[key] == table.lookup(key, key_id)
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assert truth_map[key].value_size == table.lookup(key, key_id).value_size
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else:
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assert table.lookup(key, key_id) is None
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table.insert(key, key_id, value)
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truth_map[key] = value
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else:
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table.delete(key, key_id)
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deleted = table.delete(key, key_id)
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if deleted:
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assert key in truth_map
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if key in truth_map:
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del truth_map[key]
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# Check all keys are unique in the sample set.
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for _i in range(10):
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samples = table.random_sample(kSampleSize)
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unique_keys = {}
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for sample in samples:
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unique_keys[sample.key] = True
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assert len(samples) == len(unique_keys)
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assert len(table) == len(truth_map)
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for key in truth_map:
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assert table.lookup(key, int(key[1:])) is not None
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assert truth_map[key].value_size == table.lookup(key, int(key[1:])).value_size
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print("Test hash table: Success")
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def assert_metrics(cache, expected_value):
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def assert_metrics(cache, expected_value, expected_value_size=1, custom_hashtable=True):
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assert cache.used_size == expected_value[0], "Expected {}, Actual {}".format(
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expected_value[0], cache.used_size
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)
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@ -70,24 +97,35 @@ def assert_metrics(cache, expected_value):
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), "Expected {}, Actual {}".format(
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expected_value[2], cache.miss_ratio_stats.num_misses
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)
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assert cache.table.elements == len(expected_value[3]) + len(
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assert len(cache.table) == len(expected_value[3]) + len(
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expected_value[4]
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), "Expected {}, Actual {}".format(
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len(expected_value[3]) + len(expected_value[4]), cache.table.elements
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)
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for expeceted_k in expected_value[3]:
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val = cache.table.lookup("b{}".format(expeceted_k), expeceted_k)
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assert val is not None
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assert val.value_size == 1
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if custom_hashtable:
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val = cache.table.lookup("b{}".format(expeceted_k), expeceted_k)
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else:
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val = cache.table["b{}".format(expeceted_k)]
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assert val is not None, "Expected {} Actual: Not Exist {}, Table: {}".format(
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expeceted_k, expected_value, cache.table
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)
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assert val.value_size == expected_value_size
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for expeceted_k in expected_value[4]:
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val = cache.table.lookup("g{}".format(expeceted_k), expeceted_k)
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if custom_hashtable:
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val = cache.table.lookup("g0-{}".format(expeceted_k), expeceted_k)
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else:
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val = cache.table["g0-{}".format(expeceted_k)]
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assert val is not None
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assert val.value_size == 1
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assert val.value_size == expected_value_size
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# Access k1, k1, k2, k3, k3, k3, k4
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def test_cache(policies, expected_value):
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cache = ThompsonSamplingCache(3, False, policies)
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# When k4 is inserted,
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# LRU should evict k1.
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# LFU should evict k2.
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# MRU should evict k3.
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def test_cache(cache, expected_value, custom_hashtable=True):
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k1 = TraceRecord(
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access_time=0,
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block_id=1,
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@ -103,6 +141,14 @@ def test_cache(policies, expected_value):
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key_id=1,
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kv_size=5,
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is_hit=1,
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referenced_key_exist_in_block=1,
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num_keys_in_block=0,
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table_id=0,
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seq_number=0,
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block_key_size=0,
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key_size=0,
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block_offset_in_file=0,
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next_access_seq_no=0,
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)
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k2 = TraceRecord(
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access_time=1,
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@ -119,6 +165,14 @@ def test_cache(policies, expected_value):
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key_id=1,
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kv_size=5,
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is_hit=1,
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referenced_key_exist_in_block=1,
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num_keys_in_block=0,
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table_id=0,
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seq_number=0,
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block_key_size=0,
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key_size=0,
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block_offset_in_file=0,
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next_access_seq_no=0,
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)
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k3 = TraceRecord(
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access_time=2,
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@ -135,6 +189,14 @@ def test_cache(policies, expected_value):
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key_id=1,
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kv_size=5,
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is_hit=1,
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referenced_key_exist_in_block=1,
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num_keys_in_block=0,
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table_id=0,
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seq_number=0,
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block_key_size=0,
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key_size=0,
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block_offset_in_file=0,
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next_access_seq_no=0,
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)
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k4 = TraceRecord(
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access_time=3,
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@ -151,6 +213,14 @@ def test_cache(policies, expected_value):
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key_id=1,
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kv_size=5,
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is_hit=1,
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referenced_key_exist_in_block=1,
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num_keys_in_block=0,
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table_id=0,
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seq_number=0,
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block_key_size=0,
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key_size=0,
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block_offset_in_file=0,
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next_access_seq_no=0,
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)
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sequence = [k1, k1, k2, k3, k3, k3]
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index = 0
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@ -167,20 +237,29 @@ def test_cache(policies, expected_value):
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expected_values.append([3, 5, 3, [1, 2, 3], []])
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# Access k3, hit.
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expected_values.append([3, 6, 3, [1, 2, 3], []])
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access_time = 0
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for access in sequence:
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access.access_time = access_time
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cache.access(access)
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assert_metrics(cache, expected_values[index])
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assert_metrics(
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cache,
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expected_values[index],
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expected_value_size=1,
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custom_hashtable=custom_hashtable,
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)
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access_time += 1
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index += 1
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k4.access_time = access_time
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cache.access(k4)
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assert_metrics(cache, expected_value)
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assert_metrics(
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cache, expected_value, expected_value_size=1, custom_hashtable=custom_hashtable
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)
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def test_lru_cache():
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def test_lru_cache(cache, custom_hashtable):
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print("Test LRU cache")
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policies = []
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policies.append(LRUPolicy())
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# Access k4, miss. evict k1
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test_cache(policies, [3, 7, 4, [2, 3, 4], []])
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test_cache(cache, [3, 7, 4, [2, 3, 4], []], custom_hashtable)
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print("Test LRU cache: Success")
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@ -189,7 +268,10 @@ def test_mru_cache():
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policies = []
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policies.append(MRUPolicy())
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# Access k4, miss. evict k3
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test_cache(policies, [3, 7, 4, [1, 2, 4], []])
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test_cache(
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ThompsonSamplingCache(3, False, policies, cost_class_label=None),
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[3, 7, 4, [1, 2, 4], []],
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)
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print("Test MRU cache: Success")
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@ -198,22 +280,36 @@ def test_lfu_cache():
|
|||
policies = []
|
||||
policies.append(LFUPolicy())
|
||||
# Access k4, miss. evict k2
|
||||
test_cache(policies, [3, 7, 4, [1, 3, 4], []])
|
||||
test_cache(
|
||||
ThompsonSamplingCache(3, False, policies, cost_class_label=None),
|
||||
[3, 7, 4, [1, 3, 4], []],
|
||||
)
|
||||
print("Test LFU cache: Success")
|
||||
|
||||
|
||||
def test_mix(cache):
|
||||
print("Test Mix {} cache".format(cache.cache_name()))
|
||||
n = 100000
|
||||
records = 199
|
||||
records = 100
|
||||
block_size_table = {}
|
||||
trace_num_misses = 0
|
||||
for i in range(n):
|
||||
key_id = random.randint(0, records)
|
||||
vs = random.randint(0, 10)
|
||||
now = i * kMicrosInSecond
|
||||
block_size = vs
|
||||
if key_id in block_size_table:
|
||||
block_size = block_size_table[key_id]
|
||||
else:
|
||||
block_size_table[key_id] = block_size
|
||||
is_hit = key_id % 2
|
||||
if is_hit == 0:
|
||||
trace_num_misses += 1
|
||||
k = TraceRecord(
|
||||
access_time=i,
|
||||
access_time=now,
|
||||
block_id=key_id,
|
||||
block_type=1,
|
||||
block_size=vs,
|
||||
block_size=block_size,
|
||||
cf_id=0,
|
||||
cf_name="",
|
||||
level=0,
|
||||
|
|
@ -223,13 +319,117 @@ def test_mix(cache):
|
|||
get_id=key_id,
|
||||
key_id=key_id,
|
||||
kv_size=5,
|
||||
is_hit=1,
|
||||
is_hit=is_hit,
|
||||
referenced_key_exist_in_block=1,
|
||||
num_keys_in_block=0,
|
||||
table_id=0,
|
||||
seq_number=0,
|
||||
block_key_size=0,
|
||||
key_size=0,
|
||||
block_offset_in_file=0,
|
||||
next_access_seq_no=vs,
|
||||
)
|
||||
cache.access(k)
|
||||
assert cache.miss_ratio_stats.miss_ratio() > 0
|
||||
if cache.cache_name() == "Trace":
|
||||
assert cache.miss_ratio_stats.num_accesses == n
|
||||
assert cache.miss_ratio_stats.num_misses == trace_num_misses
|
||||
else:
|
||||
assert cache.used_size <= cache.cache_size
|
||||
all_values = cache.table.values()
|
||||
cached_size = 0
|
||||
for value in all_values:
|
||||
cached_size += value.value_size
|
||||
assert cached_size == cache.used_size, "Expeced {} Actual {}".format(
|
||||
cache.used_size, cached_size
|
||||
)
|
||||
print("Test Mix {} cache: Success".format(cache.cache_name()))
|
||||
|
||||
|
||||
def test_end_to_end():
|
||||
print("Test All caches")
|
||||
n = 100000
|
||||
nblocks = 1000
|
||||
block_size = 16 * 1024
|
||||
ncfs = 7
|
||||
nlevels = 6
|
||||
nfds = 100000
|
||||
trace_file_path = "test_trace"
|
||||
# All blocks are of the same size so that OPT must achieve the lowest miss
|
||||
# ratio.
|
||||
with open(trace_file_path, "w+") as trace_file:
|
||||
access_records = ""
|
||||
for i in range(n):
|
||||
key_id = random.randint(0, nblocks)
|
||||
cf_id = random.randint(0, ncfs)
|
||||
level = random.randint(0, nlevels)
|
||||
fd = random.randint(0, nfds)
|
||||
now = i * kMicrosInSecond
|
||||
access_record = ""
|
||||
access_record += "{},".format(now)
|
||||
access_record += "{},".format(key_id)
|
||||
access_record += "{},".format(9) # block type
|
||||
access_record += "{},".format(block_size) # block size
|
||||
access_record += "{},".format(cf_id)
|
||||
access_record += "cf_{},".format(cf_id)
|
||||
access_record += "{},".format(level)
|
||||
access_record += "{},".format(fd)
|
||||
access_record += "{},".format(key_id % 3) # caller
|
||||
access_record += "{},".format(0) # no insert
|
||||
access_record += "{},".format(i) # get_id
|
||||
access_record += "{},".format(i) # key_id
|
||||
access_record += "{},".format(100) # kv_size
|
||||
access_record += "{},".format(1) # is_hit
|
||||
access_record += "{},".format(1) # referenced_key_exist_in_block
|
||||
access_record += "{},".format(10) # num_keys_in_block
|
||||
access_record += "{},".format(1) # table_id
|
||||
access_record += "{},".format(0) # seq_number
|
||||
access_record += "{},".format(10) # block key size
|
||||
access_record += "{},".format(20) # key size
|
||||
access_record += "{},".format(0) # block offset
|
||||
access_record = access_record[:-1]
|
||||
access_records += access_record + "\n"
|
||||
trace_file.write(access_records)
|
||||
|
||||
print("Test All caches: Start testing caches")
|
||||
cache_size = block_size * nblocks / 10
|
||||
downsample_size = 1
|
||||
cache_ms = {}
|
||||
for cache_type in [
|
||||
"ts",
|
||||
"opt",
|
||||
"lru",
|
||||
"pylru",
|
||||
"linucb",
|
||||
"gdsize",
|
||||
"pyccbt",
|
||||
"pycctbbt",
|
||||
]:
|
||||
cache = create_cache(cache_type, cache_size, downsample_size)
|
||||
run(trace_file_path, cache_type, cache, 0, -1, "all")
|
||||
cache_ms[cache_type] = cache
|
||||
assert cache.miss_ratio_stats.num_accesses == n
|
||||
|
||||
for cache_type in cache_ms:
|
||||
cache = cache_ms[cache_type]
|
||||
ms = cache.miss_ratio_stats.miss_ratio()
|
||||
assert ms <= 100.0 and ms >= 0.0
|
||||
# OPT should perform the best.
|
||||
assert cache_ms["opt"].miss_ratio_stats.miss_ratio() <= ms
|
||||
assert cache.used_size <= cache.cache_size
|
||||
all_values = cache.table.values()
|
||||
cached_size = 0
|
||||
for value in all_values:
|
||||
cached_size += value.value_size
|
||||
assert cached_size == cache.used_size, "Expeced {} Actual {}".format(
|
||||
cache.used_size, cached_size
|
||||
)
|
||||
print("Test All {}: Success".format(cache.cache_name()))
|
||||
|
||||
os.remove(trace_file_path)
|
||||
print("Test All: Success")
|
||||
|
||||
|
||||
def test_hybrid(cache):
|
||||
print("Test {} cache".format(cache.cache_name()))
|
||||
k = TraceRecord(
|
||||
|
|
@ -247,6 +447,14 @@ def test_hybrid(cache):
|
|||
key_id=1,
|
||||
kv_size=0, # no size.
|
||||
is_hit=1,
|
||||
referenced_key_exist_in_block=1,
|
||||
num_keys_in_block=0,
|
||||
table_id=0,
|
||||
seq_number=0,
|
||||
block_key_size=0,
|
||||
key_size=0,
|
||||
block_offset_in_file=0,
|
||||
next_access_seq_no=0,
|
||||
)
|
||||
cache.access(k) # Expect a miss.
|
||||
# used size, num accesses, num misses, hash table size, blocks, get keys.
|
||||
|
|
@ -319,22 +527,208 @@ def test_hybrid(cache):
|
|||
k.key_id = 4 # Same row key and should not be inserted again.
|
||||
k.kv_size = 1
|
||||
cache.access(k)
|
||||
assert_metrics(cache, [16, 103, 99, [i for i in range(101 - kSampleSize, 101)], []])
|
||||
assert_metrics(
|
||||
cache, [kSampleSize, 103, 99, [i for i in range(101 - kSampleSize, 101)], []]
|
||||
)
|
||||
print("Test {} cache: Success".format(cache.cache_name()))
|
||||
|
||||
|
||||
def test_opt_cache():
|
||||
print("Test OPT cache")
|
||||
cache = OPTCache(3)
|
||||
# seq: 0, 1, 2, 3, 4, 5, 6, 7, 8
|
||||
# key: k1, k2, k3, k4, k5, k6, k7, k1, k8
|
||||
# next_access: 7, 19, 18, M, M, 17, 16, 25, M
|
||||
k = TraceRecord(
|
||||
access_time=0,
|
||||
block_id=1,
|
||||
block_type=1,
|
||||
block_size=1,
|
||||
cf_id=0,
|
||||
cf_name="",
|
||||
level=0,
|
||||
fd=0,
|
||||
caller=1,
|
||||
no_insert=0,
|
||||
get_id=1, # the first get request.
|
||||
key_id=1,
|
||||
kv_size=0, # no size.
|
||||
is_hit=1,
|
||||
referenced_key_exist_in_block=1,
|
||||
num_keys_in_block=0,
|
||||
table_id=0,
|
||||
seq_number=0,
|
||||
block_key_size=0,
|
||||
key_size=0,
|
||||
block_offset_in_file=0,
|
||||
next_access_seq_no=7,
|
||||
)
|
||||
cache.access(k)
|
||||
assert_metrics(
|
||||
cache, [1, 1, 1, [1], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 2
|
||||
k.next_access_seq_no = 19
|
||||
cache.access(k)
|
||||
assert_metrics(
|
||||
cache, [2, 2, 2, [1, 2], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 3
|
||||
k.next_access_seq_no = 18
|
||||
cache.access(k)
|
||||
assert_metrics(
|
||||
cache, [3, 3, 3, [1, 2, 3], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 4
|
||||
k.next_access_seq_no = sys.maxsize # Never accessed again.
|
||||
cache.access(k)
|
||||
# Evict 2 since its next access 19 is the furthest in the future.
|
||||
assert_metrics(
|
||||
cache, [3, 4, 4, [1, 3, 4], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 5
|
||||
k.next_access_seq_no = sys.maxsize # Never accessed again.
|
||||
cache.access(k)
|
||||
# Evict 4 since its next access MAXINT is the furthest in the future.
|
||||
assert_metrics(
|
||||
cache, [3, 5, 5, [1, 3, 5], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 6
|
||||
k.next_access_seq_no = 17
|
||||
cache.access(k)
|
||||
# Evict 5 since its next access MAXINT is the furthest in the future.
|
||||
assert_metrics(
|
||||
cache, [3, 6, 6, [1, 3, 6], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 7
|
||||
k.next_access_seq_no = 16
|
||||
cache.access(k)
|
||||
# Evict 3 since its next access 18 is the furthest in the future.
|
||||
assert_metrics(
|
||||
cache, [3, 7, 7, [1, 6, 7], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 1
|
||||
k.next_access_seq_no = 25
|
||||
cache.access(k)
|
||||
assert_metrics(
|
||||
cache, [3, 8, 7, [1, 6, 7], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
k.access_time += 1
|
||||
k.block_id = 8
|
||||
k.next_access_seq_no = sys.maxsize
|
||||
cache.access(k)
|
||||
# Evict 1 since its next access 25 is the furthest in the future.
|
||||
assert_metrics(
|
||||
cache, [3, 9, 8, [6, 7, 8], []], expected_value_size=1, custom_hashtable=False
|
||||
)
|
||||
|
||||
# Insert a large kv pair to evict all keys.
|
||||
k.access_time += 1
|
||||
k.block_id = 10
|
||||
k.block_size = 3
|
||||
k.next_access_seq_no = sys.maxsize
|
||||
cache.access(k)
|
||||
assert_metrics(
|
||||
cache, [3, 10, 9, [10], []], expected_value_size=3, custom_hashtable=False
|
||||
)
|
||||
print("Test OPT cache: Success")
|
||||
|
||||
|
||||
def test_trace_cache():
|
||||
print("Test trace cache")
|
||||
cache = TraceCache(0)
|
||||
k = TraceRecord(
|
||||
access_time=0,
|
||||
block_id=1,
|
||||
block_type=1,
|
||||
block_size=1,
|
||||
cf_id=0,
|
||||
cf_name="",
|
||||
level=0,
|
||||
fd=0,
|
||||
caller=1,
|
||||
no_insert=0,
|
||||
get_id=1,
|
||||
key_id=1,
|
||||
kv_size=0,
|
||||
is_hit=1,
|
||||
referenced_key_exist_in_block=1,
|
||||
num_keys_in_block=0,
|
||||
table_id=0,
|
||||
seq_number=0,
|
||||
block_key_size=0,
|
||||
key_size=0,
|
||||
block_offset_in_file=0,
|
||||
next_access_seq_no=7,
|
||||
)
|
||||
cache.access(k)
|
||||
assert cache.miss_ratio_stats.num_accesses == 1
|
||||
assert cache.miss_ratio_stats.num_misses == 0
|
||||
k.is_hit = 0
|
||||
cache.access(k)
|
||||
assert cache.miss_ratio_stats.num_accesses == 2
|
||||
assert cache.miss_ratio_stats.num_misses == 1
|
||||
print("Test trace cache: Success")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
policies = []
|
||||
policies.append(MRUPolicy())
|
||||
policies.append(LRUPolicy())
|
||||
policies.append(LFUPolicy())
|
||||
test_hash_table()
|
||||
test_lru_cache()
|
||||
test_trace_cache()
|
||||
test_opt_cache()
|
||||
test_lru_cache(
|
||||
ThompsonSamplingCache(
|
||||
3, enable_cache_row_key=0, policies=[LRUPolicy()], cost_class_label=None
|
||||
),
|
||||
custom_hashtable=True,
|
||||
)
|
||||
test_lru_cache(LRUCache(3, enable_cache_row_key=0), custom_hashtable=False)
|
||||
test_mru_cache()
|
||||
test_lfu_cache()
|
||||
test_mix(ThompsonSamplingCache(100, False, policies))
|
||||
test_mix(ThompsonSamplingCache(100, True, policies))
|
||||
test_mix(LinUCBCache(100, False, policies))
|
||||
test_mix(LinUCBCache(100, True, policies))
|
||||
test_hybrid(ThompsonSamplingCache(kSampleSize, True, [LRUPolicy()]))
|
||||
test_hybrid(LinUCBCache(kSampleSize, True, [LRUPolicy()]))
|
||||
test_hybrid(
|
||||
ThompsonSamplingCache(
|
||||
kSampleSize,
|
||||
enable_cache_row_key=1,
|
||||
policies=[LRUPolicy()],
|
||||
cost_class_label=None,
|
||||
)
|
||||
)
|
||||
test_hybrid(
|
||||
LinUCBCache(
|
||||
kSampleSize,
|
||||
enable_cache_row_key=1,
|
||||
policies=[LRUPolicy()],
|
||||
cost_class_label=None,
|
||||
)
|
||||
)
|
||||
for cache_type in [
|
||||
"ts",
|
||||
"opt",
|
||||
"arc",
|
||||
"pylfu",
|
||||
"pymru",
|
||||
"trace",
|
||||
"pyhb",
|
||||
"lru",
|
||||
"pylru",
|
||||
"linucb",
|
||||
"gdsize",
|
||||
"pycctbbt",
|
||||
"pycctb",
|
||||
"pyccbt",
|
||||
]:
|
||||
for enable_row_cache in [0, 1, 2]:
|
||||
cache_type_str = cache_type
|
||||
if cache_type != "opt" and cache_type != "trace":
|
||||
if enable_row_cache == 1:
|
||||
cache_type_str += "_hybrid"
|
||||
elif enable_row_cache == 2:
|
||||
cache_type_str += "_hybridn"
|
||||
test_mix(create_cache(cache_type_str, cache_size=100, downsample_size=1))
|
||||
test_end_to_end()
|
||||
|
|
|
|||
|
|
@ -127,6 +127,9 @@ DEFINE_string(analyze_get_spatial_locality_labels, "",
|
|||
"Group data blocks using these labels.");
|
||||
DEFINE_string(analyze_get_spatial_locality_buckets, "",
|
||||
"Group data blocks by their statistics using these buckets.");
|
||||
DEFINE_string(skew_labels, "",
|
||||
"Group the access count of a block using these labels.");
|
||||
DEFINE_string(skew_buckets, "", "Group the skew labels using these buckets.");
|
||||
DEFINE_bool(mrc_only, false,
|
||||
"Evaluate alternative cache policies only. When this flag is true, "
|
||||
"the analyzer does NOT maintain states of each block in memory for "
|
||||
|
|
@ -147,6 +150,7 @@ namespace {
|
|||
|
||||
const std::string kMissRatioCurveFileName = "mrc";
|
||||
const std::string kGroupbyBlock = "block";
|
||||
const std::string kGroupbyTable = "table";
|
||||
const std::string kGroupbyColumnFamily = "cf";
|
||||
const std::string kGroupbySSTFile = "sst";
|
||||
const std::string kGroupbyBlockType = "bt";
|
||||
|
|
@ -164,6 +168,7 @@ const std::string kSupportedCacheNames =
|
|||
// The suffix for the generated csv files.
|
||||
const std::string kFileNameSuffixMissRatioTimeline = "miss_ratio_timeline";
|
||||
const std::string kFileNameSuffixMissTimeline = "miss_timeline";
|
||||
const std::string kFileNameSuffixSkew = "skewness";
|
||||
const std::string kFileNameSuffixAccessTimeline = "access_timeline";
|
||||
const std::string kFileNameSuffixCorrelation = "correlation_input";
|
||||
const std::string kFileNameSuffixAvgReuseIntervalNaccesses =
|
||||
|
|
@ -540,6 +545,62 @@ void BlockCacheTraceAnalyzer::WriteMissTimeline(uint64_t time_unit) const {
|
|||
}
|
||||
}
|
||||
|
||||
void BlockCacheTraceAnalyzer::WriteSkewness(
|
||||
const std::string& label_str, const std::vector<uint64_t>& percent_buckets,
|
||||
TraceType target_block_type) const {
|
||||
std::set<std::string> labels = ParseLabelStr(label_str);
|
||||
std::map<std::string, uint64_t> label_naccesses;
|
||||
uint64_t total_naccesses = 0;
|
||||
auto block_callback = [&](const std::string& cf_name, uint64_t fd,
|
||||
uint32_t level, TraceType type,
|
||||
const std::string& /*block_key*/, uint64_t block_id,
|
||||
const BlockAccessInfo& block) {
|
||||
if (target_block_type != TraceType::kTraceMax &&
|
||||
target_block_type != type) {
|
||||
return;
|
||||
}
|
||||
const std::string label = BuildLabel(
|
||||
labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id, block);
|
||||
label_naccesses[label] += block.num_accesses;
|
||||
total_naccesses += block.num_accesses;
|
||||
};
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
std::map<std::string, std::map<uint64_t, uint64_t>> label_bucket_naccesses;
|
||||
std::vector<std::pair<std::string, uint64_t>> pairs;
|
||||
for (auto const& itr : label_naccesses) {
|
||||
pairs.push_back(itr);
|
||||
}
|
||||
// Sort in descending order.
|
||||
sort(
|
||||
pairs.begin(), pairs.end(),
|
||||
[=](std::pair<std::string, uint64_t>& a,
|
||||
std::pair<std::string, uint64_t>& b) { return b.second < a.second; });
|
||||
|
||||
size_t prev_start_index = 0;
|
||||
for (auto const& percent : percent_buckets) {
|
||||
label_bucket_naccesses[label_str][percent] = 0;
|
||||
size_t end_index = 0;
|
||||
if (percent == port::kMaxUint64) {
|
||||
end_index = label_naccesses.size();
|
||||
} else {
|
||||
end_index = percent * label_naccesses.size() / 100;
|
||||
}
|
||||
for (size_t i = prev_start_index; i < end_index; i++) {
|
||||
label_bucket_naccesses[label_str][percent] += pairs[i].second;
|
||||
}
|
||||
prev_start_index = end_index;
|
||||
}
|
||||
std::string filename_suffix;
|
||||
if (target_block_type != TraceType::kTraceMax) {
|
||||
filename_suffix = block_type_to_string(target_block_type);
|
||||
filename_suffix += "_";
|
||||
}
|
||||
filename_suffix += kFileNameSuffixSkew;
|
||||
WriteStatsToFile(label_str, percent_buckets, filename_suffix,
|
||||
label_bucket_naccesses, total_naccesses);
|
||||
}
|
||||
|
||||
void BlockCacheTraceAnalyzer::WriteCorrelationFeatures(
|
||||
const std::string& label_str, uint32_t max_number_of_values) const {
|
||||
std::set<std::string> labels = ParseLabelStr(label_str);
|
||||
|
|
@ -549,12 +610,16 @@ void BlockCacheTraceAnalyzer::WriteCorrelationFeatures(
|
|||
[&](const std::string& cf_name, uint64_t fd, uint32_t level,
|
||||
TraceType block_type, const std::string& /*block_key*/,
|
||||
uint64_t /*block_key_id*/, const BlockAccessInfo& block) {
|
||||
if (block.table_id == 0 && labels.find(kGroupbyTable) != labels.end()) {
|
||||
// We only know table id information for get requests.
|
||||
return;
|
||||
}
|
||||
if (labels.find(kGroupbyCaller) != labels.end()) {
|
||||
// Group by caller.
|
||||
for (auto const& caller_map : block.caller_access_timeline) {
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, block_type,
|
||||
caller_map.first, /*block_id=*/0);
|
||||
caller_map.first, /*block_id=*/0, block);
|
||||
auto it = block.caller_access_sequence__number_timeline.find(
|
||||
caller_map.first);
|
||||
assert(it != block.caller_access_sequence__number_timeline.end());
|
||||
|
|
@ -563,14 +628,15 @@ void BlockCacheTraceAnalyzer::WriteCorrelationFeatures(
|
|||
}
|
||||
return;
|
||||
}
|
||||
const std::string label = BuildLabel(
|
||||
labels, cf_name, fd, level, block_type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, /*block_id=*/0);
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, block_type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller,
|
||||
/*block_id=*/0, block);
|
||||
UpdateFeatureVectors(block.access_sequence_number_timeline,
|
||||
block.access_timeline, label, &label_features,
|
||||
&label_predictions);
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
WriteCorrelationFeaturesToFile(label_str, label_features, label_predictions,
|
||||
max_number_of_values);
|
||||
}
|
||||
|
|
@ -656,7 +722,7 @@ std::set<std::string> BlockCacheTraceAnalyzer::ParseLabelStr(
|
|||
std::string BlockCacheTraceAnalyzer::BuildLabel(
|
||||
const std::set<std::string>& labels, const std::string& cf_name,
|
||||
uint64_t fd, uint32_t level, TraceType type, TableReaderCaller caller,
|
||||
uint64_t block_key) const {
|
||||
uint64_t block_key, const BlockAccessInfo& block) const {
|
||||
std::map<std::string, std::string> label_value_map;
|
||||
label_value_map[kGroupbyAll] = kGroupbyAll;
|
||||
label_value_map[kGroupbyLevel] = std::to_string(level);
|
||||
|
|
@ -665,6 +731,7 @@ std::string BlockCacheTraceAnalyzer::BuildLabel(
|
|||
label_value_map[kGroupbyBlockType] = block_type_to_string(type);
|
||||
label_value_map[kGroupbyColumnFamily] = cf_name;
|
||||
label_value_map[kGroupbyBlock] = std::to_string(block_key);
|
||||
label_value_map[kGroupbyTable] = std::to_string(block.table_id);
|
||||
// Concatenate the label values.
|
||||
std::string label;
|
||||
for (auto const& l : labels) {
|
||||
|
|
@ -683,7 +750,8 @@ void BlockCacheTraceAnalyzer::TraverseBlocks(
|
|||
const std::string& /*block_key*/,
|
||||
uint64_t /*block_key_id*/,
|
||||
const BlockAccessInfo& /*block_access_info*/)>
|
||||
block_callback) const {
|
||||
block_callback,
|
||||
std::set<std::string>* labels) const {
|
||||
for (auto const& cf_aggregates : cf_aggregates_map_) {
|
||||
// Stats per column family.
|
||||
const std::string& cf_name = cf_aggregates.first;
|
||||
|
|
@ -698,6 +766,11 @@ void BlockCacheTraceAnalyzer::TraverseBlocks(
|
|||
for (auto const& block_access_info :
|
||||
block_type_aggregates.second.block_access_info_map) {
|
||||
// Stats per block.
|
||||
if (labels && block_access_info.second.table_id == 0 &&
|
||||
labels->find(kGroupbyTable) != labels->end()) {
|
||||
// We only know table id information for get requests.
|
||||
return;
|
||||
}
|
||||
block_callback(cf_name, fd, level, type, block_access_info.first,
|
||||
block_access_info.second.block_id,
|
||||
block_access_info.second);
|
||||
|
|
@ -733,7 +806,7 @@ void BlockCacheTraceAnalyzer::WriteGetSpatialLocality(
|
|||
}
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, TraceType::kBlockTraceDataBlock,
|
||||
TableReaderCaller::kUserGet, /*block_id=*/0);
|
||||
TableReaderCaller::kUserGet, /*block_id=*/0, block);
|
||||
|
||||
const uint64_t percent_referenced_for_existing_keys =
|
||||
static_cast<uint64_t>(std::max(
|
||||
|
|
@ -761,7 +834,7 @@ void BlockCacheTraceAnalyzer::WriteGetSpatialLocality(
|
|||
->second += 1;
|
||||
nblocks += 1;
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
WriteStatsToFile(label_str, percent_buckets, kFileNameSuffixPercentRefKeys,
|
||||
label_pnrefkeys_nblocks, nblocks);
|
||||
WriteStatsToFile(label_str, percent_buckets,
|
||||
|
|
@ -792,7 +865,7 @@ void BlockCacheTraceAnalyzer::WriteAccessTimeline(const std::string& label_str,
|
|||
continue;
|
||||
}
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, type, caller, block_id);
|
||||
BuildLabel(labels, cf_name, fd, level, type, caller, block_id, block);
|
||||
for (auto const& naccess : timeline.second) {
|
||||
const uint64_t timestamp = naccess.first / time_unit;
|
||||
const uint64_t num = naccess.second;
|
||||
|
|
@ -806,7 +879,7 @@ void BlockCacheTraceAnalyzer::WriteAccessTimeline(const std::string& label_str,
|
|||
access_count_block_id_map[naccesses].push_back(std::to_string(block_id));
|
||||
}
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
|
||||
// We have label_access_timeline now. Write them into a file.
|
||||
const std::string user_access_prefix =
|
||||
|
|
@ -877,9 +950,9 @@ void BlockCacheTraceAnalyzer::WriteReuseDistance(
|
|||
uint32_t level, TraceType type,
|
||||
const std::string& /*block_key*/, uint64_t block_id,
|
||||
const BlockAccessInfo& block) {
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id);
|
||||
const std::string label = BuildLabel(
|
||||
labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id, block);
|
||||
if (label_distance_num_reuses.find(label) ==
|
||||
label_distance_num_reuses.end()) {
|
||||
// The first time we encounter this label.
|
||||
|
|
@ -894,7 +967,7 @@ void BlockCacheTraceAnalyzer::WriteReuseDistance(
|
|||
total_num_reuses += reuse_distance.second;
|
||||
}
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
// We have label_naccesses and label_distance_num_reuses now. Write them into
|
||||
// a file.
|
||||
const std::string output_path =
|
||||
|
|
@ -1016,17 +1089,17 @@ void BlockCacheTraceAnalyzer::WriteReuseInterval(
|
|||
if (labels.find(kGroupbyCaller) != labels.end()) {
|
||||
for (auto const& timeline : block.caller_num_accesses_timeline) {
|
||||
const TableReaderCaller caller = timeline.first;
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, type, caller, block_id);
|
||||
const std::string label = BuildLabel(labels, cf_name, fd, level, type,
|
||||
caller, block_id, block);
|
||||
UpdateReuseIntervalStats(label, time_buckets, timeline.second,
|
||||
&label_time_num_reuses, &total_num_reuses);
|
||||
}
|
||||
return;
|
||||
}
|
||||
// Does not group by caller so we need to flatten the access timeline.
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id);
|
||||
const std::string label = BuildLabel(
|
||||
labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id, block);
|
||||
std::map<uint64_t, uint64_t> timeline;
|
||||
for (auto const& caller_timeline : block.caller_num_accesses_timeline) {
|
||||
for (auto const& time_naccess : caller_timeline.second) {
|
||||
|
|
@ -1045,7 +1118,7 @@ void BlockCacheTraceAnalyzer::WriteReuseInterval(
|
|||
label_avg_reuse_naccesses[label].upper_bound(avg_reuse_interval)->second +=
|
||||
block.num_accesses;
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
|
||||
// Write the stats into files.
|
||||
WriteStatsToFile(label_str, time_buckets, kFileNameSuffixReuseInterval,
|
||||
|
|
@ -1074,9 +1147,9 @@ void BlockCacheTraceAnalyzer::WriteReuseLifetime(
|
|||
} else {
|
||||
lifetime = port::kMaxUint64 - 1;
|
||||
}
|
||||
const std::string label =
|
||||
BuildLabel(labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id);
|
||||
const std::string label = BuildLabel(
|
||||
labels, cf_name, fd, level, type,
|
||||
TableReaderCaller::kMaxBlockCacheLookupCaller, block_id, block);
|
||||
|
||||
if (label_lifetime_nblocks.find(label) == label_lifetime_nblocks.end()) {
|
||||
// The first time we encounter this label.
|
||||
|
|
@ -1087,7 +1160,7 @@ void BlockCacheTraceAnalyzer::WriteReuseLifetime(
|
|||
label_lifetime_nblocks[label].upper_bound(lifetime)->second += 1;
|
||||
total_nblocks += 1;
|
||||
};
|
||||
TraverseBlocks(block_callback);
|
||||
TraverseBlocks(block_callback, &labels);
|
||||
WriteStatsToFile(label_str, time_buckets, kFileNameSuffixReuseLifetime,
|
||||
label_lifetime_nblocks, total_nblocks);
|
||||
}
|
||||
|
|
@ -1396,11 +1469,17 @@ Status BlockCacheTraceAnalyzer::WriteHumanReadableTraceRecord(
|
|||
int ret = snprintf(
|
||||
trace_record_buffer_, sizeof(trace_record_buffer_),
|
||||
"%" PRIu64 ",%" PRIu64 ",%u,%" PRIu64 ",%" PRIu64 ",%s,%" PRIu32
|
||||
",%" PRIu64 ",%u,%u,%" PRIu64 ",%" PRIu64 ",%" PRIu64 ",%u\n",
|
||||
",%" PRIu64 ",%u,%u,%" PRIu64 ",%" PRIu64 ",%" PRIu64 ",%u,%u,%" PRIu64
|
||||
",%" PRIu64 ",%" PRIu64 ",%" PRIu64 ",%" PRIu64 ",%" PRIu64 "\n",
|
||||
access.access_timestamp, block_id, access.block_type, access.block_size,
|
||||
access.cf_id, access.cf_name.c_str(), access.level, access.sst_fd_number,
|
||||
access.caller, access.no_insert, access.get_id, get_key_id,
|
||||
access.referenced_data_size, access.is_cache_hit);
|
||||
access.referenced_data_size, access.is_cache_hit,
|
||||
access.referenced_key_exist_in_block, access.num_keys_in_block,
|
||||
BlockCacheTraceHelper::GetTableId(access),
|
||||
BlockCacheTraceHelper::GetSequenceNumber(access), access.block_key.size(),
|
||||
access.referenced_key.size(),
|
||||
BlockCacheTraceHelper::GetBlockOffsetInFile(access));
|
||||
if (ret < 0) {
|
||||
return Status::IOError("failed to format the output");
|
||||
}
|
||||
|
|
@ -1432,13 +1511,13 @@ Status BlockCacheTraceAnalyzer::RecordAccess(
|
|||
uint64_t get_key_id = 0;
|
||||
if (access.caller == TableReaderCaller::kUserGet &&
|
||||
access.get_id != BlockCacheTraceHelper::kReservedGetId) {
|
||||
std::string row_key = BlockCacheTraceHelper::ComputeRowKey(access);
|
||||
if (get_key_info_map_.find(row_key) == get_key_info_map_.end()) {
|
||||
get_key_info_map_[row_key].key_id = unique_get_key_id_;
|
||||
get_key_id = unique_get_key_id_;
|
||||
std::string user_key = ExtractUserKey(access.referenced_key).ToString();
|
||||
if (get_key_info_map_.find(user_key) == get_key_info_map_.end()) {
|
||||
get_key_info_map_[user_key].key_id = unique_get_key_id_;
|
||||
unique_get_key_id_++;
|
||||
}
|
||||
get_key_info_map_[row_key].AddAccess(access, access_sequence_number_);
|
||||
get_key_id = get_key_info_map_[user_key].key_id;
|
||||
get_key_info_map_[user_key].AddAccess(access, access_sequence_number_);
|
||||
}
|
||||
|
||||
if (compute_reuse_distance_) {
|
||||
|
|
@ -2224,6 +2303,25 @@ int block_cache_trace_analyzer_tool(int argc, char** argv) {
|
|||
analyzer.WriteCorrelationFeaturesForGet(
|
||||
FLAGS_analyze_correlation_coefficients_max_number_of_values);
|
||||
}
|
||||
|
||||
if (!FLAGS_skew_labels.empty() && !FLAGS_skew_buckets.empty()) {
|
||||
std::vector<uint64_t> buckets = parse_buckets(FLAGS_skew_buckets);
|
||||
std::stringstream ss(FLAGS_skew_labels);
|
||||
while (ss.good()) {
|
||||
std::string label;
|
||||
getline(ss, label, ',');
|
||||
if (label.find("block") != std::string::npos) {
|
||||
analyzer.WriteSkewness(label, buckets,
|
||||
TraceType::kBlockTraceIndexBlock);
|
||||
analyzer.WriteSkewness(label, buckets,
|
||||
TraceType::kBlockTraceFilterBlock);
|
||||
analyzer.WriteSkewness(label, buckets, TraceType::kBlockTraceDataBlock);
|
||||
analyzer.WriteSkewness(label, buckets, TraceType::kTraceMax);
|
||||
} else {
|
||||
analyzer.WriteSkewness(label, buckets, TraceType::kTraceMax);
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -33,6 +33,8 @@ struct GetKeyInfo {
|
|||
// Statistics of a block.
|
||||
struct BlockAccessInfo {
|
||||
uint64_t block_id = 0;
|
||||
uint64_t table_id = 0;
|
||||
uint64_t block_offset = 0;
|
||||
uint64_t num_accesses = 0;
|
||||
uint64_t block_size = 0;
|
||||
uint64_t first_access_time = 0;
|
||||
|
|
@ -73,6 +75,8 @@ struct BlockAccessInfo {
|
|||
if (first_access_time == 0) {
|
||||
first_access_time = access.access_timestamp;
|
||||
}
|
||||
table_id = BlockCacheTraceHelper::GetTableId(access);
|
||||
block_offset = BlockCacheTraceHelper::GetBlockOffsetInFile(access);
|
||||
last_access_time = access.access_timestamp;
|
||||
block_size = access.block_size;
|
||||
caller_num_access_map[access.caller]++;
|
||||
|
|
@ -301,6 +305,10 @@ class BlockCacheTraceAnalyzer {
|
|||
|
||||
void WriteCorrelationFeaturesForGet(uint32_t max_number_of_values) const;
|
||||
|
||||
void WriteSkewness(const std::string& label_str,
|
||||
const std::vector<uint64_t>& percent_buckets,
|
||||
TraceType target_block_type) const;
|
||||
|
||||
const std::map<std::string, ColumnFamilyAccessInfoAggregate>&
|
||||
TEST_cf_aggregates_map() const {
|
||||
return cf_aggregates_map_;
|
||||
|
|
@ -312,7 +320,8 @@ class BlockCacheTraceAnalyzer {
|
|||
std::string BuildLabel(const std::set<std::string>& labels,
|
||||
const std::string& cf_name, uint64_t fd,
|
||||
uint32_t level, TraceType type,
|
||||
TableReaderCaller caller, uint64_t block_key) const;
|
||||
TableReaderCaller caller, uint64_t block_key,
|
||||
const BlockAccessInfo& block) const;
|
||||
|
||||
void ComputeReuseDistance(BlockAccessInfo* info) const;
|
||||
|
||||
|
|
@ -341,7 +350,8 @@ class BlockCacheTraceAnalyzer {
|
|||
const std::string& /*block_key*/,
|
||||
uint64_t /*block_key_id*/,
|
||||
const BlockAccessInfo& /*block_access_info*/)>
|
||||
block_callback) const;
|
||||
block_callback,
|
||||
std::set<std::string>* labels = nullptr) const;
|
||||
|
||||
void UpdateFeatureVectors(
|
||||
const std::vector<uint64_t>& access_sequence_number_timeline,
|
||||
|
|
|
|||
|
|
@ -181,7 +181,9 @@ class BlockCacheTracerTest : public testing::Test {
|
|||
analyze_get_spatial_locality_labels_,
|
||||
"-analyze_get_spatial_locality_buckets=" +
|
||||
analyze_get_spatial_locality_buckets_,
|
||||
"-analyze_correlation_coefficients_labels=all"};
|
||||
"-analyze_correlation_coefficients_labels=all",
|
||||
"-skew_labels=all",
|
||||
"-skew_buckets=10,50,100"};
|
||||
char arg_buffer[kArgBufferSize];
|
||||
char* argv[kMaxArgCount];
|
||||
int argc = 0;
|
||||
|
|
@ -331,6 +333,33 @@ TEST_F(BlockCacheTracerTest, BlockCacheAnalyzer) {
|
|||
}
|
||||
}
|
||||
}
|
||||
{
|
||||
// Validate the skewness csv file.
|
||||
const std::string skewness_file_path = test_path_ + "/all_skewness";
|
||||
std::ifstream skew_file(skewness_file_path);
|
||||
// Read header.
|
||||
std::string line;
|
||||
ASSERT_TRUE(getline(skew_file, line));
|
||||
std::stringstream ss(line);
|
||||
double sum_percent = 0;
|
||||
while (getline(skew_file, line)) {
|
||||
std::stringstream ss_naccess(line);
|
||||
std::string substr;
|
||||
bool read_label = false;
|
||||
while (ss_naccess.good()) {
|
||||
ASSERT_TRUE(getline(ss_naccess, substr, ','));
|
||||
if (!read_label) {
|
||||
read_label = true;
|
||||
continue;
|
||||
}
|
||||
sum_percent += ParseDouble(substr);
|
||||
}
|
||||
}
|
||||
ASSERT_EQ(100.0, sum_percent);
|
||||
ASSERT_FALSE(getline(skew_file, line));
|
||||
skew_file.close();
|
||||
ASSERT_OK(env_->DeleteFile(skewness_file_path));
|
||||
}
|
||||
{
|
||||
// Validate the timeline csv files.
|
||||
const std::vector<std::string> time_units{"_60", "_3600"};
|
||||
|
|
|
|||
|
|
@ -61,11 +61,40 @@ std::string BlockCacheTraceHelper::ComputeRowKey(
|
|||
return "";
|
||||
}
|
||||
Slice key = ExtractUserKey(access.referenced_key);
|
||||
uint64_t seq_no = access.get_from_user_specified_snapshot == Boolean::kFalse
|
||||
? 0
|
||||
: 1 + GetInternalKeySeqno(access.referenced_key);
|
||||
return std::to_string(access.sst_fd_number) + "_" + key.ToString() + "_" +
|
||||
std::to_string(seq_no);
|
||||
return std::to_string(access.sst_fd_number) + "_" + key.ToString();
|
||||
}
|
||||
|
||||
uint64_t BlockCacheTraceHelper::GetTableId(
|
||||
const BlockCacheTraceRecord& access) {
|
||||
if (!IsGetOrMultiGet(access.caller) || access.referenced_key.size() < 4) {
|
||||
return 0;
|
||||
}
|
||||
return static_cast<uint64_t>(DecodeFixed32(access.referenced_key.data())) + 1;
|
||||
}
|
||||
|
||||
uint64_t BlockCacheTraceHelper::GetSequenceNumber(
|
||||
const BlockCacheTraceRecord& access) {
|
||||
if (!IsGetOrMultiGet(access.caller)) {
|
||||
return 0;
|
||||
}
|
||||
return access.get_from_user_specified_snapshot == Boolean::kFalse
|
||||
? 0
|
||||
: 1 + GetInternalKeySeqno(access.referenced_key);
|
||||
}
|
||||
|
||||
uint64_t BlockCacheTraceHelper::GetBlockOffsetInFile(
|
||||
const BlockCacheTraceRecord& access) {
|
||||
Slice input(access.block_key);
|
||||
uint64_t offset = 0;
|
||||
while (true) {
|
||||
uint64_t tmp = 0;
|
||||
if (GetVarint64(&input, &tmp)) {
|
||||
offset = tmp;
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
return offset;
|
||||
}
|
||||
|
||||
BlockCacheTraceWriter::BlockCacheTraceWriter(
|
||||
|
|
|
|||
|
|
@ -31,6 +31,15 @@ class BlockCacheTraceHelper {
|
|||
// Row key is a concatenation of the access's fd_number and the referenced
|
||||
// user key.
|
||||
static std::string ComputeRowKey(const BlockCacheTraceRecord& access);
|
||||
// The first four bytes of the referenced key in a Get request is the table
|
||||
// id.
|
||||
static uint64_t GetTableId(const BlockCacheTraceRecord& access);
|
||||
// The sequence number of a get request is the last part of the referenced
|
||||
// key.
|
||||
static uint64_t GetSequenceNumber(const BlockCacheTraceRecord& access);
|
||||
// Block offset in a file is the last varint64 in the block key.
|
||||
static uint64_t GetBlockOffsetInFile(const BlockCacheTraceRecord& access);
|
||||
|
||||
static const std::string kUnknownColumnFamilyName;
|
||||
static const uint64_t kReservedGetId;
|
||||
};
|
||||
|
|
|
|||
|
|
@ -84,7 +84,7 @@ class CacheSimulatorTest : public testing::Test {
|
|||
for (auto const& key : keys) {
|
||||
std::string row_key = kRefKeyPrefix + key + kRefKeySequenceNumber;
|
||||
auto handle =
|
||||
sim_cache->Lookup("0_" + ExtractUserKey(row_key).ToString() + "_0");
|
||||
sim_cache->Lookup("0_" + ExtractUserKey(row_key).ToString());
|
||||
EXPECT_NE(nullptr, handle);
|
||||
sim_cache->Release(handle);
|
||||
}
|
||||
|
|
@ -229,10 +229,9 @@ TEST_F(CacheSimulatorTest, HybridRowBlockCacheSimulator) {
|
|||
ASSERT_EQ(100, cache_simulator->miss_ratio_stats().miss_ratio());
|
||||
ASSERT_EQ(10, cache_simulator->miss_ratio_stats().user_accesses());
|
||||
ASSERT_EQ(100, cache_simulator->miss_ratio_stats().user_miss_ratio());
|
||||
auto handle = sim_cache->Lookup(
|
||||
std::to_string(first_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(first_get.referenced_key).ToString() + "_" +
|
||||
std::to_string(1 + GetInternalKeySeqno(first_get.referenced_key)));
|
||||
auto handle =
|
||||
sim_cache->Lookup(std::to_string(first_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(first_get.referenced_key).ToString());
|
||||
ASSERT_NE(nullptr, handle);
|
||||
sim_cache->Release(handle);
|
||||
for (uint32_t i = 100; i < block_id; i++) {
|
||||
|
|
@ -256,10 +255,9 @@ TEST_F(CacheSimulatorTest, HybridRowBlockCacheSimulator) {
|
|||
ASSERT_EQ(15, cache_simulator->miss_ratio_stats().user_accesses());
|
||||
ASSERT_EQ(66, static_cast<uint64_t>(
|
||||
cache_simulator->miss_ratio_stats().user_miss_ratio()));
|
||||
handle = sim_cache->Lookup(
|
||||
std::to_string(second_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(second_get.referenced_key).ToString() + "_" +
|
||||
std::to_string(1 + GetInternalKeySeqno(second_get.referenced_key)));
|
||||
handle =
|
||||
sim_cache->Lookup(std::to_string(second_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(second_get.referenced_key).ToString());
|
||||
ASSERT_NE(nullptr, handle);
|
||||
sim_cache->Release(handle);
|
||||
for (uint32_t i = 100; i < block_id; i++) {
|
||||
|
|
@ -394,7 +392,7 @@ TEST_F(CacheSimulatorTest, HybridRowBlockCacheSimulatorGetTest) {
|
|||
AssertCache(sim_cache, cache_simulator->miss_ratio_stats(), 7, 8, 4,
|
||||
{"1", "2", "3", "5"}, {"1", "2", "4"});
|
||||
for (auto const& key : {"1", "2", "4"}) {
|
||||
auto handle = sim_cache->Lookup("0_" + kRefKeyPrefix + key + "_0");
|
||||
auto handle = sim_cache->Lookup("0_" + kRefKeyPrefix + key);
|
||||
ASSERT_NE(nullptr, handle);
|
||||
sim_cache->Release(handle);
|
||||
}
|
||||
|
|
@ -417,7 +415,7 @@ TEST_F(CacheSimulatorTest, HybridRowBlockCacheSimulatorGetTest) {
|
|||
AssertCache(sim_cache, cache_simulator->miss_ratio_stats(), 16, 103, 99, {},
|
||||
{});
|
||||
for (auto const& key : {"1", "2", "4"}) {
|
||||
auto handle = sim_cache->Lookup("0_" + kRefKeyPrefix + key + "_0");
|
||||
auto handle = sim_cache->Lookup("0_" + kRefKeyPrefix + key);
|
||||
ASSERT_EQ(nullptr, handle);
|
||||
}
|
||||
}
|
||||
|
|
@ -437,9 +435,9 @@ TEST_F(CacheSimulatorTest, HybridRowBlockNoInsertCacheSimulator) {
|
|||
cache_simulator->Access(first_get);
|
||||
block_id++;
|
||||
}
|
||||
auto handle = sim_cache->Lookup(
|
||||
std::to_string(first_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(first_get.referenced_key).ToString() + "_0");
|
||||
auto handle =
|
||||
sim_cache->Lookup(std::to_string(first_get.sst_fd_number) + "_" +
|
||||
ExtractUserKey(first_get.referenced_key).ToString());
|
||||
ASSERT_NE(nullptr, handle);
|
||||
sim_cache->Release(handle);
|
||||
// All blocks are missing from the cache since insert_blocks_row_kvpair_misses
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user