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First draft of (experimental) benchmarking support

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This commit is contained in:
Phil Nash
2017-08-04 19:23:30 +01:00
parent a1e3f0b624
commit a9b6813ad9
14 changed files with 227 additions and 20 deletions
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1
include/catch.hpp
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@@ -33,6 +33,7 @@
#include "internal/catch_test_registry.hpp"
#include "internal/catch_capture.hpp"
#include "internal/catch_section.h"
#include "internal/catch_benchmark.h"
#include "internal/catch_interfaces_exception.h"
#include "internal/catch_approx.hpp"
#include "internal/catch_matchers_string.h"

30
include/internal/catch_benchmark.cpp Normal file
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@@ -0,0 +1,30 @@
/*
* Created by Phil on 04/07/2017.
* Copyright 2017 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include "catch_benchmark.h"
#include "catch_capture.hpp"
namespace Catch {
void BenchmarkLooper::reportStart() const {
getResultCapture().benchmarkStarting( { m_name } );
}
auto BenchmarkLooper::needsMoreIterations() -> bool {
auto elapsed = m_timer.getElapsedNanoseconds();
// Exponentially increasing iterations until we're confident in our timer resolution
if( elapsed < m_resolution ) {
m_iterationsToRun *= 10;
return true;
}
getResultCapture().benchmarkEnded( { { m_name }, m_count, elapsed } );
return false;
}
} // end namespace Catch

55
include/internal/catch_benchmark.h Normal file
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@@ -0,0 +1,55 @@
/*
* Created by Phil on 04/07/2017.
* Copyright 2017 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef TWOBLUECUBES_CATCH_BENCHMARK_H_INCLUDED
#define TWOBLUECUBES_CATCH_BENCHMARK_H_INCLUDED
#include "catch_stringref.h"
#include "catch_timer.h"
#include <cstdint>
#include <string>
namespace Catch {
class BenchmarkLooper {
std::string m_name;
size_t m_count = 0;
size_t m_iterationsToRun = 1;
uint64_t m_resolution;
Timer m_timer;
public:
// Keep most of this inline as it's on the code path that is being timed
BenchmarkLooper( StringRef name )
: m_name( name.c_str() ),
m_resolution( getEstimatedClockResolution()*10 )
{
reportStart();
m_timer.start();
}
explicit operator bool() {
if( m_count < m_iterationsToRun )
return true;
return needsMoreIterations();
}
void increment() {
++m_count;
}
void reportStart() const;
auto needsMoreIterations() -> bool;
};
} // end namespace Catch
#define BENCHMARK( name ) \
for( Catch::BenchmarkLooper looper( name ); looper; looper.increment() )
#endif // TWOBLUECUBES_CATCH_BENCHMARK_H_INCLUDED

6
include/internal/catch_interfaces_capture.h
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@@ -11,6 +11,7 @@
#include <string>
#include "catch_result_type.h"
#include "catch_common.h"
#include "catch_interfaces_reporter.h"
namespace Catch {
@@ -27,11 +28,16 @@ namespace Catch {
virtual ~IResultCapture();
virtual void assertionStarting( AssertionInfo const& info ) = 0;
virtual void assertionEnded( AssertionResult const& result ) = 0;
virtual bool sectionStarted( SectionInfo const& sectionInfo,
Counts& assertions ) = 0;
virtual void sectionEnded( SectionEndInfo const& endInfo ) = 0;
virtual void sectionEndedEarly( SectionEndInfo const& endInfo ) = 0;
virtual void benchmarkStarting( BenchmarkInfo const& info ) = 0;
virtual void benchmarkEnded( BenchmarkStats const& stats ) = 0;
virtual void pushScopedMessage( MessageInfo const& message ) = 0;
virtual void popScopedMessage( MessageInfo const& message ) = 0;

14
include/internal/catch_interfaces_reporter.h
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@@ -158,6 +158,14 @@ namespace Catch {
bool aborting;
};
struct BenchmarkInfo {
std::string name;
};
struct BenchmarkStats {
BenchmarkInfo info;
size_t iterations;
uint64_t elapsedTimeInNanoseconds;
};
class MultipleReporters;
struct IStreamingReporter {
@@ -177,11 +185,17 @@ namespace Catch {
virtual void testCaseStarting( TestCaseInfo const& testInfo ) = 0;
virtual void sectionStarting( SectionInfo const& sectionInfo ) = 0;
// *** experimental ***
virtual void benchmarkStarting( BenchmarkInfo const& ) {}
virtual void assertionStarting( AssertionInfo const& assertionInfo ) = 0;
// The return value indicates if the messages buffer should be cleared:
virtual bool assertionEnded( AssertionStats const& assertionStats ) = 0;
// *** experimental ***
virtual void benchmarkEnded( BenchmarkStats const& ) {}
virtual void sectionEnded( SectionStats const& sectionStats ) = 0;
virtual void testCaseEnded( TestCaseStats const& testCaseStats ) = 0;
virtual void testGroupEnded( TestGroupStats const& testGroupStats ) = 0;

4
include/internal/catch_result_builder.cpp
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@@ -34,7 +34,9 @@ namespace Catch {
char const* capturedExpression,
ResultDisposition::Flags resultDisposition )
: m_assertionInfo( macroName, lineInfo, capturedExpression, resultDisposition)
{}
{
getCurrentContext().getResultCapture()->assertionStarting( m_assertionInfo );
}
ResultBuilder::~ResultBuilder() {
#if defined(CATCH_CONFIG_FAST_COMPILE)

9
include/internal/catch_run_context.cpp
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@@ -90,6 +90,9 @@ namespace Catch {
return *m_reporter;
}
void RunContext::assertionStarting(AssertionInfo const& info) {
m_reporter->assertionStarting( info );
}
void RunContext::assertionEnded(AssertionResult const & result) {
if (result.getResultType() == ResultWas::Ok) {
m_totals.assertions.passed++;
@@ -155,6 +158,12 @@ namespace Catch {
m_unfinishedSections.push_back(endInfo);
}
void RunContext::benchmarkStarting( BenchmarkInfo const& info ) {
m_reporter->benchmarkStarting( info );
}
void RunContext::benchmarkEnded( BenchmarkStats const& stats ) {
m_reporter->benchmarkEnded( stats );
}
void RunContext::pushScopedMessage(MessageInfo const & message) {
m_messages.push_back(message);

6
include/internal/catch_run_context.hpp
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@@ -63,17 +63,19 @@ namespace Catch {
private: // IResultCapture
void assertionStarting(AssertionInfo const& info) override;
void assertionEnded(AssertionResult const& result) override;
bool sectionStarted( SectionInfo const& sectionInfo, Counts& assertions ) override;
bool testForMissingAssertions(Counts& assertions);
void sectionEnded(SectionEndInfo const& endInfo) override;
void sectionEndedEarly(SectionEndInfo const& endInfo) override;
void pushScopedMessage(MessageInfo const& message) override;
void benchmarkStarting( BenchmarkInfo const& info ) override;
void benchmarkEnded( BenchmarkStats const& stats ) override;
void pushScopedMessage(MessageInfo const& message) override;
void popScopedMessage(MessageInfo const& message) override;
std::string getCurrentTestName() const override;

1
include/internal/catch_section.cpp
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@@ -8,7 +8,6 @@
#include "catch_section.h"
#include "catch_capture.hpp"
#include "catch_compiler_capabilities.h"
namespace Catch {

54
include/internal/catch_timer.cpp
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@@ -16,21 +16,47 @@ namespace Catch {
return std::chrono::duration_cast<std::chrono::nanoseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
}
void Timer::start() {
m_nanoseconds = getCurrentNanosecondsSinceEpoch();
}
auto Timer::getElapsedNanoseconds() const -> unsigned int {
return static_cast<unsigned int>(getCurrentNanosecondsSinceEpoch() - m_nanoseconds);
}
auto Timer::getElapsedMicroseconds() const -> unsigned int {
return static_cast<unsigned int>(getElapsedNanoseconds()/1000);
}
auto Timer::getElapsedMilliseconds() const -> unsigned int {
return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
}
auto Timer::getElapsedSeconds() const -> double {
return getElapsedMicroseconds()/1000000.0;
auto estimateClockResolution() -> double {
uint64_t sum = 0;
static const uint64_t iterations = 1000000;
for( size_t i = 0; i < iterations; ++i ) {
uint64_t ticks;
uint64_t baseTicks = getCurrentNanosecondsSinceEpoch();
do {
ticks = getCurrentNanosecondsSinceEpoch();
}
while( ticks == baseTicks );
auto delta = ticks - baseTicks;
sum += delta;
}
// We're just taking the mean, here. To do better we could take the std. dev and exclude outliers
// - and potentially do more iterations if there's a high variance.
return sum/(double)iterations;
}
auto getEstimatedClockResolution() -> double {
static auto s_resolution = estimateClockResolution();
return s_resolution;
}
void Timer::start() {
m_nanoseconds = getCurrentNanosecondsSinceEpoch();
}
auto Timer::getElapsedNanoseconds() const -> unsigned int {
return static_cast<unsigned int>(getCurrentNanosecondsSinceEpoch() - m_nanoseconds);
}
auto Timer::getElapsedMicroseconds() const -> unsigned int {
return static_cast<unsigned int>(getElapsedNanoseconds()/1000);
}
auto Timer::getElapsedMilliseconds() const -> unsigned int {
return static_cast<unsigned int>(getElapsedMicroseconds()/1000);
}
auto Timer::getElapsedSeconds() const -> double {
return getElapsedMicroseconds()/1000000.0;
}
} // namespace Catch

1
include/internal/catch_timer.h
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@@ -13,6 +13,7 @@
namespace Catch {
auto getCurrentNanosecondsSinceEpoch() -> uint64_t;
auto getEstimatedClockResolution() -> double;
class Timer {
uint64_t m_nanoseconds = 0;

10
include/reporters/catch_reporter_bases.hpp
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@@ -259,6 +259,16 @@ namespace Catch {
}
return line;
}
inline char const* getBoxCharsAcross() {
static char line[CATCH_CONFIG_CONSOLE_WIDTH] = {0};
if( !*line ) {
std::memset( line, '-', CATCH_CONFIG_CONSOLE_WIDTH-1 );
line[CATCH_CONFIG_CONSOLE_WIDTH-1] = 0;
line[0] = '+';
line[CATCH_CONFIG_CONSOLE_WIDTH-2] = '+';
}
return line;
}
struct TestEventListenerBase : StreamingReporterBase<TestEventListenerBase> {

54
include/reporters/catch_reporter_console.cpp
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@@ -34,9 +34,19 @@ namespace {
namespace Catch {
template<typename T>
auto leftPad( const T& value, int width ) -> std::string {
// !TBD: could do with being optimised
std::ostringstream oss;
oss << value;
std::string converted = oss.str();
return std::string( width - converted.size(), ' ' ) + converted;
}
struct ConsoleReporter : StreamingReporterBase<ConsoleReporter> {
using StreamingReporterBase::StreamingReporterBase;
bool m_benchmarkTableOpen = false;
~ConsoleReporter() override;
static std::string getDescription() {
@@ -47,7 +57,9 @@ namespace Catch {
stream << "No test cases matched '" << spec << '\'' << std::endl;
}
void assertionStarting( AssertionInfo const& ) override {}
void assertionStarting( AssertionInfo const& ) override {
closeBenchmarkTable();
}
bool assertionEnded( AssertionStats const& _assertionStats ) override {
AssertionResult const& result = _assertionStats.assertionResult;
@@ -71,6 +83,7 @@ namespace Catch {
StreamingReporterBase::sectionStarting( _sectionInfo );
}
void sectionEnded( SectionStats const& _sectionStats ) override {
closeBenchmarkTable();
if( _sectionStats.missingAssertions ) {
lazyPrint();
Colour colour( Colour::ResultError );
@@ -89,7 +102,44 @@ namespace Catch {
StreamingReporterBase::sectionEnded( _sectionStats );
}
void benchmarkStarting( BenchmarkInfo const& info ) override {
lazyPrint();
auto nameColWidth = CATCH_CONFIG_CONSOLE_WIDTH-40;
auto nameCol = Column( info.name ).width( nameColWidth );
if( !m_benchmarkTableOpen ) {
stream
<< getBoxCharsAcross() << "\n"
<< "| benchmark name" << std::string( nameColWidth-14, ' ' ) << " | it'ns | elapsed ns | average |\n"
<< getBoxCharsAcross() << "\n";
m_benchmarkTableOpen = true;
}
bool firstLine = true;
for( auto line : nameCol ) {
if( !firstLine )
stream << " | | |" << "\n";
else
firstLine = false;
stream << "| " << line << std::string( nameColWidth-line.size(), ' ' ) << " |";
}
}
void benchmarkEnded( BenchmarkStats const& stats ) override {
// !TBD: report average times in natural units?
stream
<< " " << leftPad( stats.iterations, 6 )
<< " | " << leftPad( stats.elapsedTimeInNanoseconds, 10 )
<< " | " << leftPad( stats.elapsedTimeInNanoseconds/stats.iterations, 7 )
<< " ns |" << std::endl;
}
void closeBenchmarkTable() {
if( m_benchmarkTableOpen ) {
stream << getBoxCharsAcross() << "\n" << std::endl;
m_benchmarkTableOpen = false;
}
}
void testCaseEnded( TestCaseStats const& _testCaseStats ) override {
closeBenchmarkTable();
StreamingReporterBase::testCaseEnded( _testCaseStats );
m_headerPrinted = false;
}