181191a1e4
Summary:
Add a counter for collecting the wait time on db mutex.
Also add MutexWrapper and CondVarWrapper for measuring wait time.
Test Plan:
./db_test
export ROCKSDB_TESTS=MutexWaitStats
./db_test
verify stats output using db_bench
make clean
make release
./db_bench --statistics=1 --benchmarks=fillseq,readwhilewriting --num=10000 --threads=10
Sample output:
rocksdb.db.mutex.wait.micros COUNT : 7546866
Reviewers: MarkCallaghan, rven, sdong, igor
Reviewed By: igor
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D32787
73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
// Copyright (c) 2015, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#include "util/instrumented_mutex.h"
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#include "util/thread_status_util.h"
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namespace rocksdb {
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void InstrumentedMutex::Lock() {
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uint64_t wait_time_micros = 0;
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if (env_ != nullptr && stats_ != nullptr) {
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{
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StopWatch sw(env_, nullptr, 0, &wait_time_micros);
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LockInternal();
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}
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RecordTick(stats_, stats_code_, wait_time_micros);
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} else {
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LockInternal();
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}
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}
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void InstrumentedMutex::LockInternal() {
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#ifndef NDEBUG
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ThreadStatusUtil::TEST_StateDelay(ThreadStatus::STATE_MUTEX_WAIT);
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#endif
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mutex_.Lock();
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}
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void InstrumentedCondVar::Wait() {
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uint64_t wait_time_micros = 0;
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if (env_ != nullptr && stats_ != nullptr) {
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{
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StopWatch sw(env_, nullptr, 0, &wait_time_micros);
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WaitInternal();
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}
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RecordTick(stats_, stats_code_, wait_time_micros);
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} else {
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WaitInternal();
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}
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}
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void InstrumentedCondVar::WaitInternal() {
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#ifndef NDEBUG
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ThreadStatusUtil::TEST_StateDelay(ThreadStatus::STATE_MUTEX_WAIT);
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#endif
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cond_.Wait();
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}
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bool InstrumentedCondVar::TimedWait(uint64_t abs_time_us) {
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uint64_t wait_time_micros = 0;
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bool result = false;
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if (env_ != nullptr && stats_ != nullptr) {
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{
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StopWatch sw(env_, nullptr, 0, &wait_time_micros);
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result = TimedWaitInternal(abs_time_us);
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}
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RecordTick(stats_, stats_code_, wait_time_micros);
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} else {
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result = TimedWaitInternal(abs_time_us);
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}
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return result;
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}
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bool InstrumentedCondVar::TimedWaitInternal(uint64_t abs_time_us) {
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#ifndef NDEBUG
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ThreadStatusUtil::TEST_StateDelay(ThreadStatus::STATE_MUTEX_WAIT);
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#endif
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return cond_.TimedWait(abs_time_us);
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}
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} // namespace rocksdb
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