From 56a46e591b9b53e7bd3ac1a24ab3d6e35e131913 Mon Sep 17 00:00:00 2001 From: "bmeurer@chromium.org" Date: Thu, 24 Oct 2013 12:25:40 +0000 Subject: [PATCH] Add performance.now() to the d8 shell. TEST=mjsunit/d8-performance-now R=hpayer@chromium.org Committed: https://code.google.com/p/v8/source/detail?r=17366 Committed: https://code.google.com/p/v8/source/detail?r=17368 Review URL: https://codereview.chromium.org/32433010 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17375 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 --- src/d8.cc | 17 ++++++++ src/d8.h | 3 ++ test/mjsunit/d8-performance-now.js | 62 ++++++++++++++++++++++++++++++ test/mjsunit/mjsunit.status | 4 ++ 4 files changed, 86 insertions(+) create mode 100644 test/mjsunit/d8-performance-now.js diff --git a/src/d8.cc b/src/d8.cc index 96407a897c..357c8a4899 100644 --- a/src/d8.cc +++ b/src/d8.cc @@ -160,6 +160,7 @@ i::OS::MemoryMappedFile* Shell::counters_file_ = NULL; CounterCollection Shell::local_counters_; CounterCollection* Shell::counters_ = &local_counters_; i::Mutex Shell::context_mutex_; +const i::TimeTicks Shell::kInitialTicks = i::TimeTicks::HighResolutionNow(); Persistent Shell::utility_context_; #endif // V8_SHARED @@ -289,6 +290,15 @@ int PerIsolateData::RealmFind(Handle context) { } +#ifndef V8_SHARED +// performance.now() returns a time stamp as double, measured in milliseconds. +void Shell::PerformanceNow(const v8::FunctionCallbackInfo& args) { + i::TimeDelta delta = i::TimeTicks::HighResolutionNow() - kInitialTicks; + args.GetReturnValue().Set(delta.InMillisecondsF()); +} +#endif // V8_SHARED + + // Realm.current() returns the index of the currently active realm. void Shell::RealmCurrent(const v8::FunctionCallbackInfo& args) { Isolate* isolate = args.GetIsolate(); @@ -872,6 +882,13 @@ Handle Shell::CreateGlobalTemplate(Isolate* isolate) { RealmSharedGet, RealmSharedSet); global_template->Set(String::New("Realm"), realm_template); +#ifndef V8_SHARED + Handle performance_template = ObjectTemplate::New(); + performance_template->Set(String::New("now"), + FunctionTemplate::New(PerformanceNow)); + global_template->Set(String::New("performance"), performance_template); +#endif // V8_SHARED + #if !defined(V8_SHARED) && !defined(_WIN32) && !defined(_WIN64) Handle os_templ = ObjectTemplate::New(); AddOSMethods(os_templ); diff --git a/src/d8.h b/src/d8.h index 42013e866d..411dfdda3e 100644 --- a/src/d8.h +++ b/src/d8.h @@ -302,6 +302,8 @@ class Shell : public i::AllStatic { Handle command); static void DispatchDebugMessages(); #endif // ENABLE_DEBUGGER_SUPPORT + + static void PerformanceNow(const v8::FunctionCallbackInfo& args); #endif // V8_SHARED static void RealmCurrent(const v8::FunctionCallbackInfo& args); @@ -393,6 +395,7 @@ class Shell : public i::AllStatic { static CounterCollection* counters_; static i::OS::MemoryMappedFile* counters_file_; static i::Mutex context_mutex_; + static const i::TimeTicks kInitialTicks; static Counter* GetCounter(const char* name, bool is_histogram); static void InstallUtilityScript(Isolate* isolate); diff --git a/test/mjsunit/d8-performance-now.js b/test/mjsunit/d8-performance-now.js new file mode 100644 index 0000000000..13eb1d3f00 --- /dev/null +++ b/test/mjsunit/d8-performance-now.js @@ -0,0 +1,62 @@ +// Copyright 2013 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Flags: --allow-natives-syntax + +// Test the performance.now() function of d8. This test only makes sense with +// d8. + +// Don't run this test in gc stress mode. Time differences may be long +// due to garbage collections. +%SetFlags("--gc-interval=-1"); +%SetFlags("--nostress-compaction"); + +if (this.performance && performance.now) { + (function run() { + var start_test = performance.now(); + // Let the retry run for maximum 100ms to reduce flakiness. + for (var start = performance.now(); + start - start_test < 100; + start = performance.now()) { + var end = performance.now(); + assertTrue(start >= start_test); + assertTrue(end >= start); + while (end - start == 0) { + var next = performance.now(); + assertTrue(next >= end); + end = next; + } + if (end - start <= 1) { + // Found (sub-)millisecond granularity. + return; + } else { + print("Timer difference too big: " + (end - start) + "ms"); + } + } + assertTrue(false); + })() +} diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status index a7939d73bb..5ba166f83c 100644 --- a/test/mjsunit/mjsunit.status +++ b/test/mjsunit/mjsunit.status @@ -58,6 +58,10 @@ # Too slow in debug mode for GC stress mode. 'regress/regress-crbug-217858': [PASS, ['mode == debug', SKIP]], + ############################################################################## + # No need to waste time for this test. + 'd8-performance-now': [PASS, NO_VARIANTS], + ############################################################################## # These use a built-in that's only present in debug mode. They take # too long to run in debug mode on ARM and MIPS.