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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 <sys/param.h>
#include <sys/sysctl.h>
namespace base {
// static
ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
return new ProcessMetrics(process);
}
size_t ProcessMetrics::GetPagefileUsage() const {
struct kinfo_proc info;
size_t length;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_,
sizeof(struct kinfo_proc), 0 };
if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
return -1;
mib[5] = (length / sizeof(struct kinfo_proc));
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return -1;
return (info.p_vm_tsize + info.p_vm_dsize + info.p_vm_ssize);
}
size_t ProcessMetrics::GetPeakPagefileUsage() const {
return 0;
}
size_t ProcessMetrics::GetWorkingSetSize() const {
struct kinfo_proc info;
size_t length;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_,
sizeof(struct kinfo_proc), 0 };
if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
return -1;
mib[5] = (length / sizeof(struct kinfo_proc));
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return -1;
return info.p_vm_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;
}
bool ProcessMetrics::GetIOCounters(IoCounters* io_counters) const {
return false;
}
static int GetProcessCPU(pid_t pid) {
struct kinfo_proc info;
size_t length;
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid,
sizeof(struct kinfo_proc), 0 };
if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
return -1;
mib[5] = (length / sizeof(struct kinfo_proc));
if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
return 0;
return info.p_pctcpu;
}
double ProcessMetrics::GetCPUUsage() {
struct timeval now;
int retval = gettimeofday(&now, NULL);
if (retval)
return 0;
int64 time = TimeValToMicroseconds(now);
if (last_time_ == 0) {
// First call, just set the last values.
last_time_ = time;
last_cpu_ = GetProcessCPU(process_);
return 0;
}
int64 time_delta = time - last_time_;
DCHECK_NE(time_delta, 0);
if (time_delta == 0)
return 0;
int cpu = GetProcessCPU(process_);
last_time_ = time;
last_cpu_ = cpu;
double percentage = static_cast<double>((cpu * 100.0) / FSCALE);
return percentage;
}
ProcessMetrics::ProcessMetrics(ProcessHandle process)
: process_(process),
last_time_(0),
last_system_time_(0),
last_cpu_(0) {
processor_count_ = base::SysInfo::NumberOfProcessors();
}
size_t GetSystemCommitCharge() {
int mib[] = { CTL_VM, VM_METER };
int pagesize;
struct vmtotal vmtotal;
unsigned long mem_total, mem_free, mem_inactive;
size_t len = sizeof(vmtotal);
if (sysctl(mib, arraysize(mib), &vmtotal, &len, NULL, 0) < 0)
return 0;
mem_total = vmtotal.t_vm;
mem_free = vmtotal.t_free;
mem_inactive = vmtotal.t_vm - vmtotal.t_avm;
pagesize = getpagesize();
return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
}
} // namespace base
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