github-repos/benchmark
1
0
Fork 0
mirror of https://github.com/google/benchmark.git synced 2025-01-30 05:40:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merged with upstream

Browse Source
This commit is contained in:
Dominic Hamon 2014-01-09 12:16:51 -08:00
commit 78fa0b93ab
10 changed files with 413 additions and 132 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -4,3 +4,4 @@ Makefile
bin/
cmake_install.cmake
lib/
tags

202
LICENSE Normal file
View File

@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
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.

4
README.md
View File

@ -1,7 +1,11 @@
benchmark
=========
[![Build Status](https://drone.io/github.com/google/benchmark/status.png)](https://drone.io/github.com/google/benchmark/latest)
A library to support the benchmarking of functions, similar to unit-tests.
Discussion group: https://groups.google.com/d/forum/benchmark-discuss
Example usage:
Define a function that executes the code to be measured a
specified number of times:

166
include/benchmark/benchmark.h
View File

@ -145,24 +145,27 @@ BENCHMARK(BM_MultiThreaded)->Threads(4);
#include "macros.h"
namespace benchmark {
// If the --benchmarks flag is empty, do nothing.
//
// Otherwise, run all benchmarks specified by the --benchmarks flag,
class BenchmarkReporter;
void Initialize(int* argc, const char** argv);
// Otherwise, run all benchmarks specified by the --benchmark_filter flag,
// and exit after running the benchmarks.
extern void RunSpecifiedBenchmarks();
void RunSpecifiedBenchmarks(const BenchmarkReporter* reporter = nullptr);
// ------------------------------------------------------
// Routines that can be called from within a benchmark
//
// REQUIRES: a benchmark is currently executing
extern void SetLabel(const std::string& label);
void SetLabel(const std::string& label);
// If this routine is called, peak memory allocation past this point in the
// benchmark is reported at the end of the benchmark report line. (It is
// computed by running the benchmark once with a single iteration and a memory
// tracer.)
extern void MemoryUsage();
// TODO(dominic)
//void MemoryUsage();
// If a particular benchmark is I/O bound, or if for some reason CPU
// timings are not representative, call this method from within the
@ -170,7 +173,7 @@ extern void MemoryUsage();
// control how many iterations are run, and in the printing of
// items/second or MB/seconds values. If not called, the cpu time
// used by the benchmark will be used.
extern void UseRealTime();
void UseRealTime();
namespace internal {
class Benchmark;
@ -290,15 +293,73 @@ class State {
DISALLOW_COPY_AND_ASSIGN(State);
};
// Interface for custom benchmark result printers.
// By default, benchmark reports are printed to stdout. However an application
// can control the destination of the reports by calling
// RunSpecifiedBenchmarks and passing it a custom reporter object.
// The reporter object must implement the following interface.
class BenchmarkReporter {
public:
struct Context {
int num_cpus;
double mhz_per_cpu;
//std::string cpu_info;
bool cpu_scaling_enabled;
// The number of chars in the longest benchmark name.
int name_field_width;
};
struct Run {
Run() :
thread_index(-1),
iterations(1),
real_accumulated_time(0),
cpu_accumulated_time(0),
bytes_per_second(0),
items_per_second(0),
max_heapbytes_used(0) {}
std::string benchmark_name;
std::string report_label;
int thread_index;
int64_t iterations;
double real_accumulated_time;
double cpu_accumulated_time;
// Zero if not set by benchmark.
double bytes_per_second;
double items_per_second;
// This is set to 0.0 if memory tracing is not enabled.
double max_heapbytes_used;
};
// Called once for every suite of benchmarks run.
// The parameter "context" contains information that the
// reporter may wish to use when generating its report, for example the
// platform under which the benchmarks are running. The benchmark run is
// never started if this function returns false, allowing the reporter
// to skip runs based on the context information.
virtual bool ReportContext(const Context& context) const = 0;
// Called once for each group of benchmark runs, gives information about
// cpu-time and heap memory usage during the benchmark run.
// Note that all the grouped benchmark runs should refer to the same
// benchmark, thus have the same name.
virtual void ReportRuns(const std::vector<Run>& report) const = 0;
virtual ~BenchmarkReporter() {}
};
namespace internal {
class BenchmarkReporter;
typedef std::function<void(State&)> BenchmarkFunction;
// Run all benchmarks whose name is a partial match for the regular
// expression in "spec". The results of benchmark runs are fed to "reporter".
void RunMatchingBenchmarks(const std::string& spec,
BenchmarkReporter* reporter);
const BenchmarkReporter* reporter);
// Extract the list of benchmark names that match the specified regular
// expression.
@ -376,8 +437,6 @@ class Benchmark {
// Equivalent to ThreadRange(NumCPUs(), NumCPUs())
Benchmark* ThreadPerCpu();
// TODO(dominic): Control whether or not real-time is used for this benchmark
// -------------------------------
// Following methods are not useful for clients
@ -411,100 +470,31 @@ class Benchmark {
static void AddRange(std::vector<int>* dst, int lo, int hi, int mult);
static double MeasurePeakHeapMemory(const Instance& b);
static void RunInstance(const Instance& b, BenchmarkReporter* br);
static void RunInstance(const Instance& b, const BenchmarkReporter* br);
friend class ::benchmark::State;
friend struct ::benchmark::internal::Benchmark::Instance;
friend void ::benchmark::internal::RunMatchingBenchmarks(const std::string&,
BenchmarkReporter*);
friend void ::benchmark::internal::RunMatchingBenchmarks(
const std::string&, const BenchmarkReporter*);
DISALLOW_COPY_AND_ASSIGN(Benchmark);
};
// ------------------------------------------------------
// Benchmarks reporter interface + data containers.
struct BenchmarkContextData {
int num_cpus;
double mhz_per_cpu;
// std::string cpu_info;
bool cpu_scaling_enabled;
// The number of chars in the longest benchmark name.
int name_field_width;
};
struct BenchmarkRunData {
BenchmarkRunData()
: thread_index(-1),
iterations(1),
real_accumulated_time(0),
cpu_accumulated_time(0),
bytes_per_second(0),
items_per_second(0),
max_heapbytes_used(0) {}
std::string benchmark_name;
std::string report_label;
int thread_index;
int64_t iterations;
double real_accumulated_time;
double cpu_accumulated_time;
// Zero if not set by benchmark.
double bytes_per_second;
double items_per_second;
// This is set to 0.0 if memory tracing is not enabled.
double max_heapbytes_used;
};
// Interface for custom benchmark result printers.
// By default, benchmark reports are printed to stdout. However an application
// can control the destination of the reports by calling
// RunMatchingBenchmarks and passing it a custom reporter object.
// The reporter object must implement the following interface.
class BenchmarkReporter {
public:
// Called once for every suite of benchmarks run.
// The parameter "context" contains information that the
// reporter may wish to use when generating its report, for example the
// platform under which the benchmarks are running. The benchmark run is
// never started if this function returns false, allowing the reporter
// to skip runs based on the context information.
virtual bool ReportContext(const BenchmarkContextData& context) = 0;
// Called once for each group of benchmark runs, gives information about
// cpu-time and heap memory usage during the benchmark run.
// Note that all the grouped benchmark runs should refer to the same
// benchmark, thus have the same name.
virtual void ReportRuns(const std::vector<BenchmarkRunData>& report) = 0;
virtual ~BenchmarkReporter();
};
// ------------------------------------------------------
// Internal implementation details follow; please ignore
// Given a collection of reports, computes their mean and stddev.
// REQUIRES: all runs in "reports" must be from the same benchmark.
void ComputeStats(const std::vector<BenchmarkRunData>& reports,
BenchmarkRunData* mean_data, BenchmarkRunData* stddev_data);
// Simple reporter that outputs benchmark data to the console. This is the
// default reporter used by RunSpecifiedBenchmarks().
class ConsoleReporter : public BenchmarkReporter {
public:
virtual bool ReportContext(const BenchmarkContextData& context);
virtual void ReportRuns(const std::vector<BenchmarkRunData>& reports);
virtual bool ReportContext(const Context& context) const;
virtual void ReportRuns(const std::vector<Run>& reports) const;
private:
std::string PrintMemoryUsage(double bytes);
virtual void PrintRunData(const BenchmarkRunData& report);
int name_field_width_;
std::string PrintMemoryUsage(double bytes) const;
virtual void PrintRunData(const Run& report) const;
mutable int name_field_width_;
};
} // end namespace internal
void Initialize(int* argc, const char** argv);
} // end namespace benchmark
// ------------------------------------------------------

77
src/benchmark.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "benchmark/benchmark.h"
#include "benchmark/macros.h"
#include "colorprint.h"
@ -224,14 +238,11 @@ bool CpuScalingEnabled() {
return false;
}
} // namespace
namespace internal {
BenchmarkReporter::~BenchmarkReporter() {}
void ComputeStats(const std::vector<BenchmarkRunData>& reports,
BenchmarkRunData* mean_data, BenchmarkRunData* stddev_data) {
// Given a collection of reports, computes their mean and stddev.
// REQUIRES: all runs in "reports" must be from the same benchmark.
void ComputeStats(const std::vector<BenchmarkReporter::Run>& reports,
BenchmarkReporter::Run* mean_data,
BenchmarkReporter::Run* stddev_data) {
// Accumulators.
Stat1_d real_accumulated_time_stat;
Stat1_d cpu_accumulated_time_stat;
@ -241,7 +252,7 @@ void ComputeStats(const std::vector<BenchmarkRunData>& reports,
Stat1MinMax_d max_heapbytes_used_stat;
// Populate the accumulators.
for (std::vector<BenchmarkRunData>::const_iterator it = reports.begin();
for (std::vector<BenchmarkReporter::Run>::const_iterator it = reports.begin();
it != reports.end(); ++it) {
CHECK_EQ(reports[0].benchmark_name, it->benchmark_name);
real_accumulated_time_stat +=
@ -282,16 +293,21 @@ void ComputeStats(const std::vector<BenchmarkRunData>& reports,
stddev_data->items_per_second = items_per_second_stat.StdDev();
stddev_data->max_heapbytes_used = max_heapbytes_used_stat.StdDev();
}
} // namespace
std::string ConsoleReporter::PrintMemoryUsage(double bytes) {
if (!get_memory_usage || bytes < 0.0) return "";
namespace internal {
std::string ConsoleReporter::PrintMemoryUsage(double bytes) const {
if (!get_memory_usage || bytes < 0.0)
return "";
std::stringstream ss;
ss << " " << HumanReadableNumber(bytes) << "B peak-mem";
return ss.str();
}
bool ConsoleReporter::ReportContext(const BenchmarkContextData& context) {
bool ConsoleReporter::ReportContext(
const BenchmarkReporter::Context& context) const {
name_field_width_ = context.name_field_width;
std::cout << "Benchmarking on " << context.num_cpus << " X "
@ -319,8 +335,9 @@ bool ConsoleReporter::ReportContext(const BenchmarkContextData& context) {
return true;
}
void ConsoleReporter::ReportRuns(const std::vector<BenchmarkRunData>& reports) {
for (std::vector<BenchmarkRunData>::const_iterator it = reports.begin();
void ConsoleReporter::ReportRuns(
const std::vector<BenchmarkReporter::Run>& reports) const {
for (std::vector<BenchmarkReporter::Run>::const_iterator it = reports.begin();
it != reports.end(); ++it) {
CHECK_EQ(reports[0].benchmark_name, it->benchmark_name);
PrintRunData(*it);
@ -329,15 +346,15 @@ void ConsoleReporter::ReportRuns(const std::vector<BenchmarkRunData>& reports) {
// We don't report aggregated data if there was a single run.
if (reports.size() < 2) return;
BenchmarkRunData mean_data;
BenchmarkRunData stddev_data;
internal::ComputeStats(reports, &mean_data, &stddev_data);
BenchmarkReporter::Run mean_data;
BenchmarkReporter::Run stddev_data;
ComputeStats(reports, &mean_data, &stddev_data);
PrintRunData(mean_data);
PrintRunData(stddev_data);
}
void ConsoleReporter::PrintRunData(const BenchmarkRunData& result) {
void ConsoleReporter::PrintRunData(const BenchmarkReporter::Run& result) const {
// Format bytes per second
std::string rate;
if (result.bytes_per_second > 0) {
@ -363,13 +380,14 @@ void ConsoleReporter::PrintRunData(const BenchmarkRunData& result) {
(result.cpu_accumulated_time * 1e9) /
(static_cast<double>(result.iterations)));
ColorPrintf(COLOR_CYAN, "%10lld", result.iterations);
ColorPrintf(COLOR_DEFAULT, "%*s %*s %s%s\n",
16, rate.c_str(),
ColorPrintf(COLOR_DEFAULT, "%*s %*s %s %s\n",
13, rate.c_str(),
18, items.c_str(),
result.report_label.c_str(),
PrintMemoryUsage(result.max_heapbytes_used).c_str());
}
/* TODO(dominic)
void MemoryUsage() {
// if (benchmark_mc) {
// benchmark_mc->Reset();
@ -377,6 +395,7 @@ void MemoryUsage() {
get_memory_usage = true;
//}
}
*/
void UseRealTime() { use_real_time = true; }
@ -542,7 +561,7 @@ struct State::SharedState {
int stopping; // Number of threads that have entered STOPPING state
int threads; // Number of total threads that are running concurrently
ThreadStats stats;
std::vector<internal::BenchmarkRunData> runs; // accumulated runs
std::vector<BenchmarkReporter::Run> runs; // accumulated runs
std::string label;
explicit SharedState(const internal::Benchmark::Instance* b)
@ -766,7 +785,7 @@ void Benchmark::MeasureOverhead() {
#endif
}
void Benchmark::RunInstance(const Instance& b, BenchmarkReporter* br) {
void Benchmark::RunInstance(const Instance& b, const BenchmarkReporter* br) {
use_real_time = false;
running_benchmark = true;
// get_memory_usage = FLAGS_gbenchmark_memory_usage;
@ -810,7 +829,7 @@ void Benchmark::RunInstance(const Instance& b, BenchmarkReporter* br) {
*/
running_benchmark = false;
for (internal::BenchmarkRunData& report : state.runs) {
for (BenchmarkReporter::Run& report : state.runs) {
double seconds = (use_real_time ? report.real_accumulated_time
: report.cpu_accumulated_time);
report.benchmark_name = b.name;
@ -1006,8 +1025,7 @@ bool State::FinishInterval() {
return true;
}
internal::BenchmarkRunData data;
data.thread_index = thread_index;
BenchmarkReporter::Run data;
data.iterations = iterations_;
data.thread_index = thread_index;
@ -1094,8 +1112,7 @@ void* State::RunWrapper(void* arg) {
namespace internal {
void RunMatchingBenchmarks(const std::string& spec,
BenchmarkReporter* reporter) {
CHECK(reporter != NULL);
const BenchmarkReporter* reporter) {
if (spec.empty()) return;
std::vector<internal::Benchmark::Instance> benchmarks;
@ -1121,7 +1138,7 @@ void RunMatchingBenchmarks(const std::string& spec,
}
// Print header here
BenchmarkContextData context;
BenchmarkReporter::Context context;
context.num_cpus = NumCPUs();
context.mhz_per_cpu = CyclesPerSecond() / 1000000.0f;
// context.cpu_info = base::CompactCPUIDInfoString();
@ -1145,12 +1162,12 @@ void FindMatchingBenchmarkNames(const std::string& spec,
} // end namespace internal
void RunSpecifiedBenchmarks() {
void RunSpecifiedBenchmarks(const BenchmarkReporter* reporter /*= nullptr*/) {
std::string spec = FLAGS_benchmark_filter;
if (spec.empty() || spec == "all")
spec = "."; // Regexp that matches all benchmarks
internal::ConsoleReporter default_reporter;
internal::RunMatchingBenchmarks(spec, &default_reporter);
internal::RunMatchingBenchmarks(spec, reporter == nullptr ? &default_reporter : reporter);
pthread_cond_destroy(&starting_cv);
pthread_mutex_destroy(&starting_mutex);
pthread_mutex_destroy(&benchmark_mutex);

14
src/colorprint.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "colorprint.h"
#include <stdarg.h>

14
src/commandlineflags.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "commandlineflags.h"
#include <string.h>

14
src/sleep.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "sleep.h"
#include <time.h>

39
src/sysinfo.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "sysinfo.h"
#include <errno.h>
@ -20,21 +34,18 @@
namespace benchmark {
namespace {
const int64_t estimate_time_ms = 1000;
pthread_once_t cpuinfo_init = PTHREAD_ONCE_INIT;
double cpuinfo_cycles_per_second = 1.0;
int cpuinfo_num_cpus = 1; // Conservative guess
static pthread_mutex_t cputimens_mutex;
pthread_mutex_t cputimens_mutex;
// Helper function estimates cycles/sec by observing cycles elapsed during
// sleep(). Using small sleep time decreases accuracy significantly.
int64_t EstimateCyclesPerSecond(const int estimate_time_ms) {
CHECK(estimate_time_ms > 0);
double multiplier = 1000.0 / (double)estimate_time_ms; // scale by this much
int64_t EstimateCyclesPerSecond() {
const int64_t start_ticks = cycleclock::Now();
SleepForMilliseconds(estimate_time_ms);
const int64_t guess = int64_t(multiplier * (cycleclock::Now() - start_ticks));
return guess;
return cycleclock::Now() - start_ticks;
}
// Helper function for reading an int from a file. Returns true if successful
@ -99,9 +110,9 @@ void InitializeSystemInfo() {
if (fd == -1) {
perror(pname);
if (!saw_mhz) {
cpuinfo_cycles_per_second = EstimateCyclesPerSecond(1000);
cpuinfo_cycles_per_second = EstimateCyclesPerSecond();
}
return; // TODO: use generic tester instead?
return;
}
double bogo_clock = 1.0;
@ -165,7 +176,7 @@ void InitializeSystemInfo() {
cpuinfo_cycles_per_second = bogo_clock;
} else {
// If we don't even have bogomips, we'll use the slow estimation.
cpuinfo_cycles_per_second = EstimateCyclesPerSecond(1000);
cpuinfo_cycles_per_second = EstimateCyclesPerSecond();
}
}
if (num_cpus == 0) {
@ -201,7 +212,7 @@ void InitializeSystemInfo() {
if (sysctlbyname(sysctl_path, &hz, &sz, NULL, 0) != 0) {
fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
sysctl_path, strerror(errno));
cpuinfo_cycles_per_second = EstimateCyclesPerSecond(1000);
cpuinfo_cycles_per_second = EstimateCyclesPerSecond();
} else {
cpuinfo_cycles_per_second = hz;
}
@ -221,8 +232,8 @@ void InitializeSystemInfo() {
"~MHz", NULL, &data, &data_size)))
cpuinfo_cycles_per_second = (int64)data * (int64)(1000 * 1000); // was mhz
else
cpuinfo_cycles_per_second = EstimateCyclesPerSecond(500); // TODO <500?
// TODO: also figure out cpuinfo_num_cpus
cpuinfo_cycles_per_second = EstimateCyclesPerSecond();
// TODO: also figure out cpuinfo_num_cpus
#elif defined OS_MACOSX
// returning "mach time units" per second. the current number of elapsed
@ -250,7 +261,7 @@ void InitializeSystemInfo() {
#else
// Generic cycles per second counter
cpuinfo_cycles_per_second = EstimateCyclesPerSecond(1000);
cpuinfo_cycles_per_second = EstimateCyclesPerSecond();
#endif
}
} // end namespace

14
src/walltime.cc
View File

@ -1,3 +1,17 @@
// Copyright 2014 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 "walltime.h"
#include <stdio.h>