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// 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);
}
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