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cpuinfo.cc
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cpuinfo.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#ifdef __APPLE__
#include <sys/types.h>
#include <sys/sysctl.h>
#include <mach/mach.h>
#include <mach/task.h>
#endif
#include "sys/times.h"
#include <cstdlib>
#include <base/cpuinfo.h>
#include <fstream>
#include <iostream>
#include <boost/algorithm/string/find.hpp>
#include <boost/algorithm/string/find_iterator.hpp>
#include <boost/algorithm/string/split.hpp>
using namespace boost;
static uint32_t NumCpus() {
static uint32_t count = 0;
if (count != 0) {
return count;
}
#ifdef __APPLE__
size_t len = sizeof(count);
sysctlbyname("hw.logicalcpu", &count, &len, NULL, 0);
return count;
#else
std::ifstream file("/proc/cpuinfo");
std::string content((std::istreambuf_iterator<char>(file)),
std::istreambuf_iterator<char>());
// Create a find_iterator
typedef find_iterator<std::string::iterator> string_find_iterator;
for(string_find_iterator it =
make_find_iterator(content, first_finder("model name", is_iequal()));
it!=string_find_iterator(); ++it, count++);
return count;
#endif
}
static void LoadAvg(CpuLoad &load) {
double averages[3];
uint32_t num_cpus = NumCpus();
getloadavg(averages, 3);
if (num_cpus > 0) {
load.one_min_avg = averages[0]/num_cpus;
load.five_min_avg = averages[1]/num_cpus;
load.fifteen_min_avg = averages[2]/num_cpus;
}
}
static void ProcessMemInfo(ProcessMemInfo &info) {
#ifdef __APPLE__
struct task_basic_info t_info;
mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
if (KERN_SUCCESS != task_info(mach_task_self(),
TASK_BASIC_INFO,
(task_info_t)&t_info,
&t_info_count)) {
return;
}
info.res = t_info.resident_size;
info.virt = t_info.virtual_size;
// XXX Peak virt not availabe, just fill in virt
info.peakvirt = t_info.virtual_size;
return;
#else
std::ifstream file("/proc/self/status");
bool vmsize = false;
bool peak = false;
bool rss = false;
std::string line;
while (std::getline(file, line)) {
if (line.find("VmSize") != std::string::npos) {
std::stringstream vm(line);
std::string tmp; vm >> tmp; vm >> info.virt;
vmsize = true;
}
if (line.find("VmRSS") != std::string::npos) {
std::stringstream vm(line);
std::string tmp; vm >> tmp; vm >> info.res;
rss = true;
}
if (line.find("VmPeak") != std::string::npos) {
std::stringstream vm(line);
std::string tmp; vm >> tmp; vm >> info.peakvirt;
peak = true;
}
if (rss && vmsize && peak)
break;
}
#endif
}
static void SystemMemInfo(SystemMemInfo &info) {
std::ifstream file("/proc/meminfo");
std::string tmp;
// MemTotal: 132010576 kB
file >> tmp; file >> info.total; file >> tmp;
// MemFree: 90333184 kB
file >> tmp; file >> info.free; file >> tmp;
// Buffers: 1029924 kB
file >> tmp; file >> info.buffers; file >> tmp;
// Cached: 10290012 kB
file >> tmp; file >> info.cached;
// Used = Total - Free
info.used = info.total - info.free;
}
static clock_t snapshot, prev_sys_cpu, prev_user_cpu;
static void ProcessCpuShare(double &percentage) {
struct tms cpu_taken;
clock_t now;
now = times(&cpu_taken);
if (now <= snapshot || cpu_taken.tms_stime < prev_sys_cpu ||
cpu_taken.tms_utime < prev_user_cpu) {
percentage = -1.0;
} else {
percentage =
(double)((cpu_taken.tms_stime - prev_sys_cpu) +
(cpu_taken.tms_utime - prev_user_cpu)) / (now - snapshot);
percentage *= 100;
percentage /= NumCpus();
}
snapshot = now;
prev_sys_cpu = cpu_taken.tms_stime;
prev_user_cpu = cpu_taken.tms_utime;
}
void CpuLoadData::GetCpuLoadInfo(CpuInfo &info, bool system) {
if (system) {
LoadAvg(info.load_avg);
SystemMemInfo(info.sys_mem_info);
}
ProcessMemInfo(info.mem_info);
ProcessCpuShare(info.process_cpu_share);
info.num_cpu = NumCpus();
}
void CpuLoadData::Init() {
struct tms cpu_taken;
snapshot = times(&cpu_taken);
prev_sys_cpu = cpu_taken.tms_stime;
prev_user_cpu = cpu_taken.tms_utime;
}
void CpuLoadData::FillCpuInfo(CpuLoadInfo &cpu_load_info, bool system) {
CpuInfo info;
CpuLoadData::GetCpuLoadInfo(info, system);
cpu_load_info.set_num_cpu(info.num_cpu);
MemInfo mem_info;
mem_info.set_virt(info.mem_info.virt);
mem_info.set_peakvirt(info.mem_info.peakvirt);
mem_info.set_res(info.mem_info.res);
cpu_load_info.set_meminfo(mem_info);
cpu_load_info.set_cpu_share(info.process_cpu_share);
if (system) {
CpuLoadAvg load_avg;
load_avg.set_one_min_avg(info.load_avg.one_min_avg);
load_avg.set_five_min_avg(info.load_avg.five_min_avg);
load_avg.set_fifteen_min_avg(info.load_avg.fifteen_min_avg);
cpu_load_info.set_cpuload(load_avg);
SysMemInfo sys_mem_info;
sys_mem_info.set_total(info.sys_mem_info.total);
sys_mem_info.set_used(info.sys_mem_info.used);
sys_mem_info.set_free(info.sys_mem_info.free);
sys_mem_info.set_buffers(info.sys_mem_info.buffers);
sys_mem_info.set_cached(info.sys_mem_info.cached);
cpu_load_info.set_sys_mem_info(sys_mem_info);
}
}
void CpuLoadInfoReq::HandleRequest() const {
CpuLoadInfo cpu_load_info;
CpuLoadData::FillCpuInfo(cpu_load_info, true);
CpuLoadInfoResp *resp = new CpuLoadInfoResp;
resp->set_cpu_info(cpu_load_info);
resp->set_context(context());
resp->Response();
}
void PopulateProcessCpuInfo(const CpuLoadInfo &cpu_load_info,
ProcessCpuInfo *pinfo) {
pinfo->set_module_id(Sandesh::module());
pinfo->set_inst_id(Sandesh::instance_id());
pinfo->set_cpu_share(cpu_load_info.get_cpu_share());
pinfo->set_mem_virt(cpu_load_info.get_meminfo().get_virt());
pinfo->set_mem_res(cpu_load_info.get_meminfo().get_res());
}