1//===-- TimerTest.cpp -----------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Utility/StreamString.h"
10#include "lldb/Utility/Timer.h"
11#include "gtest/gtest.h"
12#include <thread>
13
14using namespace lldb_private;
15
16TEST(TimerTest, CategoryTimes) {
17 Timer::ResetCategoryTimes();
18 {
19 static Timer::Category tcat("CAT1");
20 Timer t(tcat, ".");
21 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
22 }
23 StreamString ss;
24 Timer::DumpCategoryTimes(s&: ss);
25 double seconds;
26 ASSERT_EQ(1, sscanf(ss.GetData(), "%lf sec for CAT1", &seconds));
27 EXPECT_LT(0.001, seconds);
28 EXPECT_GT(0.1, seconds);
29}
30
31TEST(TimerTest, CategoryTimesNested) {
32 Timer::ResetCategoryTimes();
33 {
34 static Timer::Category tcat1("CAT1");
35 Timer t1(tcat1, ".");
36 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
37 // Explicitly testing the same category as above.
38 Timer t2(tcat1, ".");
39 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
40 }
41 StreamString ss;
42 Timer::DumpCategoryTimes(s&: ss);
43 double seconds;
44 // It should only appear once.
45 ASSERT_EQ(ss.GetString().count("CAT1"), 1U);
46 ASSERT_EQ(1, sscanf(ss.GetData(), "%lf sec for CAT1", &seconds));
47 EXPECT_LT(0.002, seconds);
48 EXPECT_GT(0.2, seconds);
49}
50
51TEST(TimerTest, CategoryTimes2) {
52 Timer::ResetCategoryTimes();
53 {
54 static Timer::Category tcat1("CAT1");
55 Timer t1(tcat1, ".");
56 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(100));
57 static Timer::Category tcat2("CAT2");
58 Timer t2(tcat2, ".");
59 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
60 }
61 StreamString ss;
62 Timer::DumpCategoryTimes(s&: ss);
63 double seconds1, seconds2;
64 ASSERT_EQ(2, sscanf(ss.GetData(),
65 "%lf sec (total: %*fs; child: %*fs; count: %*d) for "
66 "CAT1%*[\n ]%lf sec for CAT2",
67 &seconds1, &seconds2))
68 << "String: " << ss.GetData();
69 EXPECT_LT(0.01, seconds1);
70 EXPECT_GT(1, seconds1);
71 EXPECT_LT(0.001, seconds2);
72 EXPECT_GT(0.1, seconds2);
73}
74
75TEST(TimerTest, CategoryTimesStats) {
76 Timer::ResetCategoryTimes();
77 {
78 static Timer::Category tcat1("CAT1");
79 Timer t1(tcat1, ".");
80 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(100));
81 static Timer::Category tcat2("CAT2");
82 {
83 Timer t2(tcat2, ".");
84 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
85 }
86 {
87 Timer t3(tcat2, ".");
88 std::this_thread::sleep_for(rtime: std::chrono::milliseconds(10));
89 }
90 }
91 // Example output:
92 // 0.105202764 sec (total: 0.132s; child: 0.027s; count: 1) for CAT1
93 // 0.026772798 sec (total: 0.027s; child: 0.000s; count: 2) for CAT2
94 StreamString ss;
95 Timer::DumpCategoryTimes(s&: ss);
96 double seconds1, total1, child1, seconds2;
97 int count1, count2;
98 ASSERT_EQ(
99 6, sscanf(ss.GetData(),
100 "%lf sec (total: %lfs; child: %lfs; count: %d) for CAT1%*[\n\r ]"
101 "%lf sec (total: %*fs; child: %*fs; count: %d) for CAT2",
102 &seconds1, &total1, &child1, &count1, &seconds2, &count2))
103 << "String: " << ss.GetData();
104 EXPECT_NEAR(total1 - child1, seconds1, 0.002);
105 EXPECT_EQ(1, count1);
106 EXPECT_NEAR(child1, seconds2, 0.002);
107 EXPECT_EQ(2, count2);
108}
109

source code of lldb/unittests/Utility/TimerTest.cpp