| // Copyright 2017 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 "content/browser/memory/swap_metrics_observer_linux.h" |
| |
| #include "base/metrics/histogram_macros.h" |
| #include "base/process/process_metrics.h" |
| |
| namespace content { |
| |
| namespace { |
| |
| bool HasSwap() { |
| base::SystemMemoryInfoKB memory_info; |
| if (!base::GetSystemMemoryInfo(&memory_info)) |
| return false; |
| return memory_info.swap_total > 0; |
| } |
| |
| } // namespace |
| |
| // static |
| SwapMetricsObserver* SwapMetricsObserver::GetInstance() { |
| static SwapMetricsObserverLinux* instance = |
| HasSwap() ? new SwapMetricsObserverLinux() : nullptr; |
| return instance; |
| } |
| |
| SwapMetricsObserverLinux::SwapMetricsObserverLinux() {} |
| |
| SwapMetricsObserverLinux::~SwapMetricsObserverLinux() {} |
| |
| void SwapMetricsObserverLinux::UpdateMetricsInternal(base::TimeDelta interval) { |
| base::SystemMemoryInfoKB memory_info; |
| if (!base::GetSystemMemoryInfo(&memory_info)) { |
| Stop(); |
| return; |
| } |
| |
| double in_counts = memory_info.pswpin - last_pswpin_; |
| double out_counts = memory_info.pswpout - last_pswpout_; |
| last_pswpin_ = memory_info.pswpin; |
| last_pswpout_ = memory_info.pswpout; |
| |
| if (interval.is_zero()) |
| return; |
| |
| UMA_HISTOGRAM_COUNTS_10000("Memory.Experimental.SwapInPerSecond", |
| in_counts / interval.InSecondsF()); |
| UMA_HISTOGRAM_COUNTS_10000("Memory.Experimental.SwapOutPerSecond", |
| out_counts / interval.InSecondsF()); |
| } |
| |
| } // namespace content |