1 // Copyright 2015 Google Inc. All rights reserved
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 // +build ignore
16
17 #include "stats.h"
18
19 #include <mutex>
20 #include <vector>
21
22 #include "flags.h"
23 #include "log.h"
24 #include "stringprintf.h"
25 #include "thread_local.h"
26 #include "timeutil.h"
27
28 namespace {
29
30 mutex g_mu;
31 vector<Stats*>* g_stats;
32 DEFINE_THREAD_LOCAL(double, g_start_time);
33
34 } // namespace
35
Stats(const char * name)36 Stats::Stats(const char* name)
37 : name_(name), elapsed_(0), cnt_(0) {
38 unique_lock<mutex> lock(g_mu);
39 if (g_stats == NULL)
40 g_stats = new vector<Stats*>;
41 g_stats->push_back(this);
42 }
43
String() const44 string Stats::String() const {
45 unique_lock<mutex> lock(mu_);
46 return StringPrintf("%s: %f / %d", name_, elapsed_, cnt_);
47 }
48
Start()49 void Stats::Start() {
50 CHECK(!TLS_REF(g_start_time));
51 TLS_REF(g_start_time) = GetTime();
52 unique_lock<mutex> lock(mu_);
53 cnt_++;
54 }
55
End()56 double Stats::End() {
57 CHECK(TLS_REF(g_start_time));
58 double e = GetTime() - TLS_REF(g_start_time);
59 TLS_REF(g_start_time) = 0;
60 unique_lock<mutex> lock(mu_);
61 elapsed_ += e;
62 return e;
63 }
64
ScopedStatsRecorder(Stats * st,const char * msg)65 ScopedStatsRecorder::ScopedStatsRecorder(Stats* st, const char* msg)
66 : st_(st), msg_(msg) {
67 if (!g_flags.enable_stat_logs)
68 return;
69 st_->Start();
70 }
71
~ScopedStatsRecorder()72 ScopedStatsRecorder::~ScopedStatsRecorder() {
73 if (!g_flags.enable_stat_logs)
74 return;
75 double e = st_->End();
76 if (msg_ && e > 3.0) {
77 LOG_STAT("slow %s (%f): %s", st_->name_, e, msg_);
78 }
79 }
80
ReportAllStats()81 void ReportAllStats() {
82 if (!g_stats)
83 return;
84 for (Stats* st : *g_stats) {
85 LOG_STAT("%s", st->String().c_str());
86 }
87 delete g_stats;
88 }
89