b15d285458
BUG= Review URL: https://webrtc-codereview.appspot.com/930025 git-svn-id: http://webrtc.googlecode.com/svn/trunk@3142 4adac7df-926f-26a2-2b94-8c16560cd09d
131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "system_wrappers/source/cpu_mac.h"
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#include <iostream>
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include "tick_util.h"
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namespace webrtc {
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CpuWrapperMac::CpuWrapperMac()
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: cpu_count_(0),
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cpu_usage_(NULL),
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total_cpu_usage_(0),
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last_tick_count_(NULL),
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last_time_(0) {
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natural_t cpu_count;
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processor_info_array_t info_array;
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mach_msg_type_number_t info_count;
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kern_return_t error = host_processor_info(mach_host_self(),
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PROCESSOR_CPU_LOAD_INFO,
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&cpu_count,
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&info_array,
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&info_count);
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if (error) {
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return;
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}
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cpu_count_ = cpu_count;
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cpu_usage_ = new WebRtc_UWord32[cpu_count];
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last_tick_count_ = new WebRtc_Word64[cpu_count];
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last_time_ = TickTime::MillisecondTimestamp();
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processor_cpu_load_info_data_t* cpu_load_info =
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(processor_cpu_load_info_data_t*) info_array;
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for (unsigned int cpu = 0; cpu < cpu_count; ++cpu) {
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WebRtc_Word64 ticks = 0;
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for (int state = 0; state < 2; ++state) {
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ticks += cpu_load_info[cpu].cpu_ticks[state];
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}
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last_tick_count_[cpu] = ticks;
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cpu_usage_[cpu] = 0;
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}
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vm_deallocate(mach_task_self(), (vm_address_t)info_array, info_count);
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}
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CpuWrapperMac::~CpuWrapperMac() {
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delete[] cpu_usage_;
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delete[] last_tick_count_;
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}
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WebRtc_Word32 CpuWrapperMac::CpuUsage() {
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WebRtc_UWord32 num_cores;
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WebRtc_UWord32* array = NULL;
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return CpuUsageMultiCore(num_cores, array);
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}
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WebRtc_Word32
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CpuWrapperMac::CpuUsageMultiCore(WebRtc_UWord32& num_cores,
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WebRtc_UWord32*& array) {
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// sanity check
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if (cpu_usage_ == NULL) {
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return -1;
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}
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WebRtc_Word64 now = TickTime::MillisecondTimestamp();
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WebRtc_Word64 time_diff_ms = now - last_time_;
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if (time_diff_ms >= 500) {
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if (Update(time_diff_ms) != 0) {
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return -1;
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}
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last_time_ = now;
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}
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num_cores = cpu_count_;
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array = cpu_usage_;
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return total_cpu_usage_ / cpu_count_;
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}
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WebRtc_Word32 CpuWrapperMac::Update(WebRtc_Word64 time_diff_ms) {
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natural_t cpu_count;
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processor_info_array_t info_array;
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mach_msg_type_number_t info_count;
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kern_return_t error = host_processor_info(mach_host_self(),
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PROCESSOR_CPU_LOAD_INFO,
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&cpu_count,
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&info_array,
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&info_count);
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if (error) {
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return -1;
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}
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processor_cpu_load_info_data_t* cpu_load_info =
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(processor_cpu_load_info_data_t*) info_array;
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total_cpu_usage_ = 0;
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for (unsigned int cpu = 0; cpu < cpu_count; ++cpu) {
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WebRtc_Word64 ticks = 0;
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for (int state = 0; state < 2; ++state) {
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ticks += cpu_load_info[cpu].cpu_ticks[state];
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}
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if (time_diff_ms <= 0) {
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cpu_usage_[cpu] = 0;
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} else {
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cpu_usage_[cpu] = (WebRtc_UWord32)((1000 *
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(ticks - last_tick_count_[cpu])) /
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time_diff_ms);
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}
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last_tick_count_[cpu] = ticks;
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total_cpu_usage_ += cpu_usage_[cpu];
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}
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vm_deallocate(mach_task_self(), (vm_address_t)info_array, info_count);
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return 0;
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}
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} // namespace webrtc
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