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// Copyright (c) 2013 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 "base/process/process_metrics.h"
#include <stddef.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <unistd.h>
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/process/process_metrics_iocounters.h"
#include "base/stl_util.h"
namespace base {
ProcessMetrics::ProcessMetrics(ProcessHandle process)
: process_(process),
last_cpu_(0) {}
// static
std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
ProcessHandle process) {
return WrapUnique(new ProcessMetrics(process));
}
double ProcessMetrics::GetPlatformIndependentCPUUsage() {
struct kinfo_proc info;
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, process_};
size_t length = sizeof(info);
if (sysctl(mib, base::size(mib), &info, &length, NULL, 0) < 0)
return 0;
return (info.ki_pctcpu / FSCALE) * 100.0;
}
TimeDelta ProcessMetrics::GetCumulativeCPUUsage() {
NOTREACHED();
return TimeDelta();
}
bool ProcessMetrics::GetIOCounters(IoCounters* io_counters) const {
return false;
}
size_t GetSystemCommitCharge() {
int mib[2], pagesize;
unsigned long mem_total, mem_free, mem_inactive;
size_t length = sizeof(mem_total);
if (sysctl(mib, base::size(mib), &mem_total, &length, NULL, 0) < 0)
return 0;
length = sizeof(mem_free);
if (sysctlbyname("vm.stats.vm.v_free_count", &mem_free, &length, NULL, 0) < 0)
return 0;
length = sizeof(mem_inactive);
if (sysctlbyname("vm.stats.vm.v_inactive_count", &mem_inactive, &length,
NULL, 0) < 0) {
return 0;
}
pagesize = getpagesize();
return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
}
} // namespace base
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