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f2f4c8072f
rocksdb/util
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Haobo Xu f2f4c8072f [RocksDB] Added nano second stopwatch and new perf counters to track block read cost 
Summary: The pupose of this diff is to expose per user-call level precise timing of block read, so that we can answer questions like: a Get() costs me 100ms, is that somehow related to loading blocks from file system, or sth else? We will answer that with EXACTLY how many blocks have been read, how much time was spent on transfering the bytes from os, how much time was spent on checksum verification and how much time was spent on block decompression, just for that one Get. A nano second stopwatch was introduced to track time with higher precision. The cost/precision of the stopwatch is also measured in unit-test. On my dev box, retrieving one time instance costs about 30ns, on average. The deviation of timing results is good enough to track 100ns-1us level events. And the overhead could be safely ignored for 100us level events (10000 instances/s), for example, a viewstate thrift call.

Test Plan: perf_context_test, also testing with viewstate shadow traffic.

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb, xjin

Differential Revision: https://reviews.facebook.net/D12351
2013-09-07 21:14:54 -07:00
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arena_impl.cc Make arena block size configurable 2013-07-31 12:42:23 -07:00
arena_impl.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
arena_test.cc Make arena block size configurable 2013-07-31 12:42:23 -07:00
auto_roll_logger_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
auto_roll_logger.cc [RocksDB] Fix PosixLogger and AutoRollLogger thread safety 2013-05-21 11:39:44 -07:00
auto_roll_logger.h [RocksDB] Fix PosixLogger and AutoRollLogger thread safety 2013-05-21 11:39:44 -07:00
bit_set.h [Rocksdb] Implement filluniquerandom 2013-06-14 16:17:56 -07:00
bloom_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
bloom.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
build_version.h Stop continually re-creating build_version.c 2013-01-24 17:51:39 -08:00
cache_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
cache.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
coding_test.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
coding.cc Add three new MemTableRep's 2013-08-22 23:10:02 -07:00
coding.h Add three new MemTableRep's 2013-08-22 23:10:02 -07:00
comparator.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
crc32c_test.cc Fix all warnings generated by -Wall option to the compiler. 2012-11-06 14:07:31 -08:00
crc32c.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
crc32c.h A number of fixes: 2011-10-31 17:22:06 +00:00
env_hdfs.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
env_posix.cc [RocksDB] Added nano second stopwatch and new perf counters to track block read cost 2013-09-07 21:14:54 -07:00
env_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
env.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
filelock_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
filter_policy.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
hash.cc A number of fixes: 2011-10-31 17:22:06 +00:00
hash.h reverting disastrous MOE commit, returning to r21 2011-04-19 23:11:15 +00:00
histogram_test.cc Introduce histogram in statistics.h 2013-02-20 10:43:32 -08:00
histogram.cc [Rocksdb] Remove unused double apis to record into histograms 2013-05-16 10:40:30 -07:00
histogram.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
ldb_cmd_execute_result.h Enhanced ldb to support data access commands 2013-01-28 11:38:26 -08:00
ldb_cmd.cc New ldb command to convert compaction style 2013-09-04 13:13:08 -07:00
ldb_cmd.h New ldb command to convert compaction style 2013-09-04 13:13:08 -07:00
ldb_tool.cc New ldb command to convert compaction style 2013-09-04 13:13:08 -07:00
logging.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
logging.h A number of fixes: 2011-10-31 17:22:06 +00:00
manual_compaction_test.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
murmurhash.cc Implement RowLocks for assoc schema 2012-10-03 23:19:01 -07:00
murmurhash.h Implement RowLocks for assoc schema 2012-10-03 23:19:01 -07:00
mutexlock.h Implement ReadWrite locks for leveldb 2012-10-01 22:37:39 -07:00
options.cc An iterator may automatically invoke reseeks. 2013-09-06 11:50:53 -07:00
perf_context_imp.h [RocksDB] Added nano second stopwatch and new perf counters to track block read cost 2013-09-07 21:14:54 -07:00
perf_context.cc [RocksDB] Added nano second stopwatch and new perf counters to track block read cost 2013-09-07 21:14:54 -07:00
posix_logger.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
random.h [RocksDB] Include 64bit random number generator 2013-06-04 13:52:27 -07:00
signal_test.cc [RocksDB] fix build 2013-04-20 10:26:51 -07:00
skiplistrep.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
slice.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
stack_trace.h [RocksDB] Add stacktrace signal handler 2013-04-20 10:26:50 -07:00
statistics.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
stats_logger.h Clean up compiler warnings generated by -Wall option. 2012-08-29 14:24:51 -07:00
status.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
stl_wrappers.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
stop_watch.h [RocksDB] Added nano second stopwatch and new perf counters to track block read cost 2013-09-07 21:14:54 -07:00
string_util.cc Ability to set different size fanout multipliers for every level. 2013-05-21 13:50:20 -07:00
string_util.h Ability to set different size fanout multipliers for every level. 2013-05-21 13:50:20 -07:00
testharness.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
testharness.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
testutil.cc Fix all warnings generated by -Wall option to the compiler. 2012-11-06 14:07:31 -08:00
testutil.h Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00
transformrep.cc Fix memory leak 2013-08-23 15:39:49 -07:00
vectorrep.cc Replace include/leveldb with include/rocksdb. 2013-08-23 10:51:00 -07:00