95 lines
1.8 KiB
C++
95 lines
1.8 KiB
C++
// Copyright 2017 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <cmath>
|
|
|
|
#include "hwy/base.h" // Abort
|
|
#include "hwy/profiler.h"
|
|
#include "hwy/timer.h"
|
|
|
|
namespace hwy {
|
|
namespace {
|
|
|
|
void Spin(const double min_time) {
|
|
const double t0 = hwy::platform::Now();
|
|
for (;;) {
|
|
const double elapsed = hwy::platform::Now() - t0;
|
|
if (elapsed > min_time) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Spin10() {
|
|
PROFILER_FUNC;
|
|
Spin(10E-6);
|
|
}
|
|
|
|
void Spin20() {
|
|
PROFILER_FUNC;
|
|
Spin(20E-6);
|
|
}
|
|
|
|
void Spin3060() {
|
|
{
|
|
PROFILER_ZONE("spin30");
|
|
Spin(30E-6);
|
|
}
|
|
{
|
|
PROFILER_ZONE("spin60");
|
|
Spin(60E-6);
|
|
}
|
|
}
|
|
|
|
void Level3() {
|
|
PROFILER_FUNC;
|
|
for (int rep = 0; rep < 10; ++rep) {
|
|
double total = 0.0;
|
|
for (int i = 0; i < 100 - rep; ++i) {
|
|
total += std::pow(0.9, i);
|
|
}
|
|
if (std::abs(total - 9.999) > 1E-2) {
|
|
HWY_ABORT("unexpected total %f", total);
|
|
}
|
|
}
|
|
}
|
|
|
|
void Level2() {
|
|
PROFILER_FUNC;
|
|
Level3();
|
|
}
|
|
|
|
void Level1() {
|
|
PROFILER_FUNC;
|
|
Level2();
|
|
}
|
|
|
|
void ProfilerExample() {
|
|
{
|
|
PROFILER_FUNC;
|
|
Spin10();
|
|
Spin20();
|
|
Spin3060();
|
|
Level1();
|
|
}
|
|
PROFILER_PRINT_RESULTS();
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace hwy
|
|
|
|
int main(int /*argc*/, char* /*argv*/[]) {
|
|
hwy::ProfilerExample();
|
|
return 0;
|
|
}
|