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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/sys_info.h"
namespace base {
ProcessMetrics::ProcessMetrics(ProcessHandle process)
: process_(process),
processor_count_(SysInfo::NumberOfProcessors()),
last_system_time_(0),
last_cpu_(0) {}
// static
std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
ProcessHandle process) {
return WrapUnique(new ProcessMetrics(process));
}
size_t ProcessMetrics::GetPagefileUsage() const {
struct kinfo_proc info;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
size_t length = sizeof(info);
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return 0;
return info.ki_size;
}
size_t ProcessMetrics::GetPeakPagefileUsage() const {
return 0;
}
size_t ProcessMetrics::GetWorkingSetSize() const {
struct kinfo_proc info;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
size_t length = sizeof(info);
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return 0;
return info.ki_rssize * getpagesize();
}
size_t ProcessMetrics::GetPeakWorkingSetSize() const {
return 0;
}
bool ProcessMetrics::GetMemoryBytes(size_t* private_bytes,
size_t* shared_bytes) {
WorkingSetKBytes ws_usage;
if (!GetWorkingSetKBytes(&ws_usage))
return false;
if (private_bytes)
*private_bytes = ws_usage.priv << 10;
if (shared_bytes)
*shared_bytes = ws_usage.shared * 1024;
return true;
}
bool ProcessMetrics::GetWorkingSetKBytes(WorkingSetKBytes* ws_usage) const {
// TODO(bapt) be sure we can't be precise
size_t priv = GetWorkingSetSize();
if (!priv)
return false;
ws_usage->priv = priv / 1024;
ws_usage->shareable = 0;
ws_usage->shared = 0;
return true;
}
double ProcessMetrics::GetCPUUsage() {
struct kinfo_proc info;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
size_t length = sizeof(info);
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return 0;
return (info.ki_pctcpu / FSCALE) * 100.0;
}
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, arraysize(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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