88 lines
2 KiB
C++
88 lines
2 KiB
C++
// Copyright 2015 Google Inc. All rights reserved
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build ignore
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#include "stats.h"
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#include <mutex>
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#include <vector>
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#include "flags.h"
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#include "log.h"
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#include "stringprintf.h"
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#include "thread_local.h"
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#include "timeutil.h"
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namespace {
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mutex g_mu;
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vector<Stats*>* g_stats;
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DEFINE_THREAD_LOCAL(double, g_start_time);
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} // namespace
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Stats::Stats(const char* name)
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: name_(name), elapsed_(0), cnt_(0) {
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unique_lock<mutex> lock(g_mu);
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if (g_stats == NULL)
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g_stats = new vector<Stats*>;
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g_stats->push_back(this);
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}
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string Stats::String() const {
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unique_lock<mutex> lock(mu_);
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return StringPrintf("%s: %f / %d", name_, elapsed_, cnt_);
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}
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void Stats::Start() {
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CHECK(!TLS_REF(g_start_time));
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TLS_REF(g_start_time) = GetTime();
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unique_lock<mutex> lock(mu_);
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cnt_++;
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}
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double Stats::End() {
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CHECK(TLS_REF(g_start_time));
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double e = GetTime() - TLS_REF(g_start_time);
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TLS_REF(g_start_time) = 0;
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unique_lock<mutex> lock(mu_);
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elapsed_ += e;
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return e;
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}
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ScopedStatsRecorder::ScopedStatsRecorder(Stats* st, const char* msg)
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: st_(st), msg_(msg) {
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if (!g_flags.enable_stat_logs)
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return;
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st_->Start();
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}
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ScopedStatsRecorder::~ScopedStatsRecorder() {
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if (!g_flags.enable_stat_logs)
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return;
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double e = st_->End();
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if (msg_ && e > 3.0) {
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LOG_STAT("slow %s (%f): %s", st_->name_, e, msg_);
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}
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}
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void ReportAllStats() {
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if (!g_stats)
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return;
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for (Stats* st : *g_stats) {
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LOG_STAT("%s", st->String().c_str());
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}
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delete g_stats;
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}
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