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91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/process/process_metrics.h"
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include "base/macros.h"
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#include "base/memory/ptr_util.h"
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#include "base/process/process_metrics_iocounters.h"
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namespace base {
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// static
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std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
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ProcessHandle process) {
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return WrapUnique(new ProcessMetrics(process));
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}
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bool ProcessMetrics::GetIOCounters(IoCounters* io_counters) const {
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return false;
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}
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static int GetProcessCPU(pid_t pid) {
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struct kinfo_proc info;
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size_t length;
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int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid,
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sizeof(struct kinfo_proc), 0 };
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if (sysctl(mib, arraysize(mib), NULL, &length, NULL, 0) < 0)
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return -1;
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mib[5] = (length / sizeof(struct kinfo_proc));
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if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
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return 0;
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return info.p_pctcpu;
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}
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double ProcessMetrics::GetPlatformIndependentCPUUsage() {
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TimeTicks time = TimeTicks::Now();
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if (last_cpu_time_.is_zero()) {
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// First call, just set the last values.
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last_cpu_time_ = time;
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return 0;
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}
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int cpu = GetProcessCPU(process_);
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last_cpu_time_ = time;
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double percentage = static_cast<double>((cpu * 100.0) / FSCALE);
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return percentage;
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}
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TimeDelta ProcessMetrics::GetCumulativeCPUUsage() {
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NOTREACHED();
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return TimeDelta();
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}
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ProcessMetrics::ProcessMetrics(ProcessHandle process)
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: process_(process),
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last_cpu_(0) {}
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size_t GetSystemCommitCharge() {
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int mib[] = { CTL_VM, VM_METER };
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int pagesize;
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struct vmtotal vmtotal;
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unsigned long mem_total, mem_free, mem_inactive;
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size_t len = sizeof(vmtotal);
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if (sysctl(mib, arraysize(mib), &vmtotal, &len, NULL, 0) < 0)
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return 0;
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mem_total = vmtotal.t_vm;
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mem_free = vmtotal.t_free;
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mem_inactive = vmtotal.t_vm - vmtotal.t_avm;
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pagesize = getpagesize();
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return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
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}
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} // namespace base
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