From 0a90cab56a60f85265afeed3315b350f94e156b1 Mon Sep 17 00:00:00 2001 From: "bmeurer@chromium.org" Date: Thu, 24 Oct 2013 10:48:18 +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 Review URL: https://codereview.chromium.org/32433010 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17368 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 --- src/d8.cc | 13 +++++++++ src/d8.h | 2 ++ test/mjsunit/d8-performance-now.js | 60 ++++++++++++++++++++++++++++++++++++++ test/mjsunit/mjsunit.status | 4 +++ 4 files changed, 79 insertions(+) create mode 100644 test/mjsunit/d8-performance-now.js diff --git a/src/d8.cc b/src/d8.cc index 96407a8..4b1d33b 100644 --- a/src/d8.cc +++ b/src/d8.cc @@ -166,6 +166,7 @@ Persistent Shell::utility_context_; Persistent Shell::evaluation_context_; ShellOptions Shell::options; const char* Shell::kPrompt = "d8> "; +const i::TimeTicks Shell::kInitialTicks = i::TimeTicks::HighResolutionNow(); const int MB = 1024 * 1024; @@ -289,6 +290,13 @@ int PerIsolateData::RealmFind(Handle context) { } +// 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()); +} + + // Realm.current() returns the index of the currently active realm. void Shell::RealmCurrent(const v8::FunctionCallbackInfo& args) { Isolate* isolate = args.GetIsolate(); @@ -872,6 +880,11 @@ Handle Shell::CreateGlobalTemplate(Isolate* isolate) { RealmSharedGet, RealmSharedSet); global_template->Set(String::New("Realm"), realm_template); + Handle performance_template = ObjectTemplate::New(); + performance_template->Set(String::New("now"), + FunctionTemplate::New(PerformanceNow)); + global_template->Set(String::New("performance"), performance_template); + #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 42013e8..a3716ee 100644 --- a/src/d8.h +++ b/src/d8.h @@ -304,6 +304,7 @@ class Shell : public i::AllStatic { #endif // ENABLE_DEBUGGER_SUPPORT #endif // V8_SHARED + static void PerformanceNow(const v8::FunctionCallbackInfo& args); static void RealmCurrent(const v8::FunctionCallbackInfo& args); static void RealmOwner(const v8::FunctionCallbackInfo& args); static void RealmGlobal(const v8::FunctionCallbackInfo& args); @@ -381,6 +382,7 @@ class Shell : public i::AllStatic { static const char* kPrompt; static ShellOptions options; + static const i::TimeTicks kInitialTicks; private: static Persistent evaluation_context_; diff --git a/test/mjsunit/d8-performance-now.js b/test/mjsunit/d8-performance-now.js new file mode 100644 index 0000000..83bd1d8 --- /dev/null +++ b/test/mjsunit/d8-performance-now.js @@ -0,0 +1,60 @@ +// 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"); + +(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 a7939d7..5ba166f 100644 --- a/test/mjsunit/mjsunit.status +++ b/test/mjsunit/mjsunit.status @@ -59,6 +59,10 @@ '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. 'fuzz-natives-part*': [PASS, ['mode == release or arch == arm or arch == android_arm or arch == mipsel', SKIP]], -- 2.7.4