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Added process cpu use and per-core global cpu use to linux overlay.

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This commit is contained in:
Tom Lally 2022-09-01 16:45:52 +01:00
parent 5f484b22d2
commit 2d30edcbc6
5 changed files with 181 additions and 79 deletions
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44
src/util/ProcessorTime/ProcessorTimeUnix.cpp Normal file
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#if BOOST_OS_LINUX
#include "util/ProcessorTime/ProcessorTime.h"
#include <sys/time.h>
#include <sys/times.h>
#include <sys/resource.h>
#include <string>
uint32_t GetProcessorCount()
{
return std::thread::hardware_concurrency();
}
void QueryProcTime(uint64_t &out_now, uint64_t &out_user, uint64_t &out_kernel)
{
struct tms time_info;
clock_t clock_now = times(&time_info);
clock_t clock_user = time_info.tms_utime;
clock_t clock_kernel = time_info.tms_utime;
out_now = static_cast<uint64_t>(clock_now);
out_user = static_cast<uint64_t>(clock_user);
out_kernel = static_cast<uint64_t>(clock_kernel);
}
void QueryCoreTimes(uint32_t count, ProcessorTime out[])
{
std::ifstream file("/proc/stat");
file.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
for (auto i = 0; i < count; ++i)
{
uint64_t user, nice, kernel, idle;
file.ignore(std::numeric_limits<std::streamsize>::max(), ' ');
file >> user >> nice >> kernel >> idle;
file.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
out[i].idle = idle;
out[i].kernel = kernel;
out[i].user = user + nice;
}
}
#endif