| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/stack_sampling_configuration.h" |
| |
| #include "chrome/browser/metrics/chrome_metrics_service_accessor.h" |
| #include "chrome/common/channel_info.h" |
| #include "components/version_info/version_info.h" |
| |
| namespace { |
| |
| bool IsProfilerEnabledForCurrentChannel() { |
| const version_info::Channel channel = chrome::GetChannel(); |
| return (channel == version_info::Channel::UNKNOWN || |
| channel == version_info::Channel::CANARY || |
| channel == version_info::Channel::DEV); |
| } |
| |
| } // namespace |
| |
| StackSamplingConfiguration::StackSamplingConfiguration() |
| // Disabled pending fixes for deadlock scenarios. https://crbug.com/528129. |
| : configuration_(PROFILE_DISABLED) { |
| } |
| |
| base::StackSamplingProfiler::SamplingParams |
| StackSamplingConfiguration::GetSamplingParams() const { |
| base::StackSamplingProfiler::SamplingParams params; |
| params.bursts = 1; |
| const base::TimeDelta duration = base::TimeDelta::FromSeconds(30); |
| |
| switch (configuration_) { |
| case PROFILE_DISABLED: |
| params.initial_delay = base::TimeDelta::FromMilliseconds(0); |
| params.sampling_interval = base::TimeDelta::FromMilliseconds(0); |
| params.samples_per_burst = 0; |
| break; |
| |
| case PROFILE_NO_SAMPLES: |
| params.initial_delay = duration; |
| params.sampling_interval = base::TimeDelta::FromMilliseconds(0); |
| params.samples_per_burst = 0; |
| break; |
| |
| case PROFILE_5HZ: |
| params.initial_delay = base::TimeDelta::FromMilliseconds(0); |
| params.sampling_interval = base::TimeDelta::FromMilliseconds(200); |
| params.samples_per_burst = duration / params.sampling_interval; |
| break; |
| |
| case PROFILE_10HZ: |
| params.initial_delay = base::TimeDelta::FromMilliseconds(0); |
| params.sampling_interval = base::TimeDelta::FromMilliseconds(100); |
| params.samples_per_burst = duration / params.sampling_interval; |
| break; |
| |
| case PROFILE_100HZ: |
| params.initial_delay = base::TimeDelta::FromMilliseconds(0); |
| params.sampling_interval = base::TimeDelta::FromMilliseconds(10); |
| params.samples_per_burst = duration / params.sampling_interval; |
| break; |
| } |
| return params; |
| } |
| |
| bool StackSamplingConfiguration::IsProfilerEnabled() const { |
| return IsProfilerEnabledForCurrentChannel() && |
| configuration_ != PROFILE_DISABLED; |
| } |
| |
| void StackSamplingConfiguration::RegisterSyntheticFieldTrial() const { |
| if (!IsProfilerEnabledForCurrentChannel()) |
| return; |
| |
| std::string group; |
| switch (configuration_) { |
| case PROFILE_DISABLED: |
| group = "Disabled"; |
| break; |
| |
| case PROFILE_NO_SAMPLES: |
| group = "NoSamples"; |
| break; |
| |
| case PROFILE_5HZ: |
| group = "5Hz"; |
| break; |
| |
| case PROFILE_10HZ: |
| group = "10Hz"; |
| break; |
| |
| case PROFILE_100HZ: |
| group = "100Hz"; |
| break; |
| } |
| |
| ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrial( |
| "SyntheticStackProfilingConfiguration", |
| group); |
| } |