decd0fed78
I changed the implementation of a queue between the VM and processor thread to be unbounded and lock-free, using Herb Sutter's example from DDJ article: http://www.ddj.com/high-performance-computing/210604448 This had brought back profiling overhead to a minimum for the page from Chromium's issue 16184. BUG=714 Review URL: http://codereview.chromium.org/2091019 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4706 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_CPU_PROFILER_INL_H_
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#define V8_CPU_PROFILER_INL_H_
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#include "cpu-profiler.h"
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#ifdef ENABLE_LOGGING_AND_PROFILING
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#include "circular-queue-inl.h"
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#include "profile-generator-inl.h"
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#include "unbound-queue-inl.h"
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namespace v8 {
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namespace internal {
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void CodeCreateEventRecord::UpdateCodeMap(CodeMap* code_map) {
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code_map->AddCode(start, entry, size);
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}
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void CodeMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
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code_map->MoveCode(from, to);
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}
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void CodeDeleteEventRecord::UpdateCodeMap(CodeMap* code_map) {
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code_map->DeleteCode(start);
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}
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void CodeAliasEventRecord::UpdateCodeMap(CodeMap* code_map) {
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code_map->AddAlias(start, entry, code_start);
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}
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TickSampleEventRecord* TickSampleEventRecord::init(void* value) {
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TickSampleEventRecord* result =
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reinterpret_cast<TickSampleEventRecord*>(value);
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result->filler = 1;
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ASSERT(result->filler != SamplingCircularQueue::kClear);
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// Init the required fields only.
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result->sample.pc = NULL;
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result->sample.frames_count = 0;
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return result;
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}
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TickSample* ProfilerEventsProcessor::TickSampleEvent() {
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generator_->Tick();
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TickSampleEventRecord* evt =
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TickSampleEventRecord::init(ticks_buffer_.Enqueue());
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evt->order = enqueue_order_; // No increment!
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return &evt->sample;
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}
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bool ProfilerEventsProcessor::FilterOutCodeCreateEvent(
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Logger::LogEventsAndTags tag) {
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// In browser mode, leave only callbacks and non-native JS entries.
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// We filter out regular expressions as currently we can't tell
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// whether they origin from native scripts, so let's not confise people by
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// showing them weird regexes they didn't wrote.
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return FLAG_prof_browser_mode
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&& (tag != Logger::CALLBACK_TAG
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&& tag != Logger::FUNCTION_TAG
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&& tag != Logger::LAZY_COMPILE_TAG
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&& tag != Logger::SCRIPT_TAG);
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}
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} } // namespace v8::internal
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#endif // ENABLE_LOGGING_AND_PROFILING
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#endif // V8_CPU_PROFILER_INL_H_
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