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// Copyright 2017 The Chromium Authors
// 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_driver_impl_linux.h"
#include <memory>
#include "base/memory/ptr_util.h"
#include "base/process/process_metrics.h"
#include "base/time/time.h"
#include "content/public/browser/swap_metrics_driver.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
std::unique_ptr<SwapMetricsDriver> SwapMetricsDriver::Create(
std::unique_ptr<Delegate> delegate,
const base::TimeDelta update_interval) {
return HasSwap() ? base::WrapUnique<SwapMetricsDriver>(
new SwapMetricsDriverImplLinux(std::move(delegate),
update_interval))
: std::unique_ptr<SwapMetricsDriver>();
}
SwapMetricsDriverImplLinux::SwapMetricsDriverImplLinux(
std::unique_ptr<Delegate> delegate,
const base::TimeDelta update_interval)
: SwapMetricsDriverImpl(std::move(delegate), update_interval) {}
SwapMetricsDriverImplLinux::~SwapMetricsDriverImplLinux() = default;
SwapMetricsDriver::SwapMetricsUpdateResult
SwapMetricsDriverImplLinux::UpdateMetricsInternal(base::TimeDelta interval) {
base::VmStatInfo vmstat;
if (!base::GetVmStatInfo(&vmstat)) {
return SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateFailed;
}
uint64_t in_counts = vmstat.pswpin - last_pswpin_;
uint64_t out_counts = vmstat.pswpout - last_pswpout_;
last_pswpin_ = vmstat.pswpin;
last_pswpout_ = vmstat.pswpout;
if (interval.is_zero())
return SwapMetricsDriver::SwapMetricsUpdateResult::
kSwapMetricsUpdateSuccess;
delegate_->OnSwapInCount(in_counts, interval);
delegate_->OnSwapOutCount(out_counts, interval);
return SwapMetricsDriver::SwapMetricsUpdateResult::kSwapMetricsUpdateSuccess;
}
} // namespace content
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