Index: content/browser/memory/swap_metrics_observer_linux.cc |
diff --git a/content/browser/memory/swap_metrics_observer_linux.cc b/content/browser/memory/swap_metrics_observer_linux.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..08212bf8ad46ae74ad635992474624c872322213 |
--- /dev/null |
+++ b/content/browser/memory/swap_metrics_observer_linux.cc |
@@ -0,0 +1,55 @@ |
+// 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 |