mirror of
https://github.com/saymrwulf/pytorch.git
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16774f7353
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/35818 Test Plan: CI Differential Revision: D20798424 Pulled By: malfet fbshipit-source-id: 57e8d9c6b93903a6632168a4a35bf946d8c518aa
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
#include <chrono>
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#include <iostream>
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#include <thread>
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#include "caffe2/core/timer.h"
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#include <gtest/gtest.h>
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namespace caffe2 {
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namespace {
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TEST(TimerTest, Test) {
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Timer timer;
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// A timer auto-starts when it is constructed.
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std::this_thread::sleep_for(std::chrono::microseconds(1));
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EXPECT_GT(timer.NanoSeconds(), 0);
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// Sleep for a while, and get the time.
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timer.Start();
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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float ns = timer.NanoSeconds();
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float us = timer.MicroSeconds();
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float ms = timer.MilliSeconds();
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// Time should be at least accurate +- 10%. (20% on Windows)
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#ifndef _WIN32
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EXPECT_NEAR(ns, 100000000, 10000000);
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EXPECT_NEAR(us, 100000, 10000);
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EXPECT_NEAR(ms, 100, 10);
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#else
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EXPECT_NEAR(ns, 100000000, 20000000);
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EXPECT_NEAR(us, 100000, 20000);
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EXPECT_NEAR(ms, 100, 20);
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#endif
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// Test restarting the clock.
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timer.Start();
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EXPECT_LT(timer.MicroSeconds(), 1000);
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}
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TEST(TimerTest, TestLatency) {
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constexpr int iter = 1000;
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float latency = 0;
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Timer timer;
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for (int i = 0; i < iter; ++i) {
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timer.Start();
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latency += timer.NanoSeconds();
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}
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std::cout << "Average nanosecond latency is: " << latency / iter << std::endl;
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latency = 0;
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for (int i = 0; i < iter; ++i) {
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timer.Start();
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latency += timer.MicroSeconds();
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}
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std::cout << "Average microsecond latency is: " << latency / iter << std::endl;
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latency = 0;
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for (int i = 0; i < iter; ++i) {
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timer.Start();
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latency += timer.MilliSeconds();
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}
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std::cout << "Average millisecond latency is: " << latency / iter << std::endl;
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}
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} // namespace
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} // namespace caffe2
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