问题描述
我想使用SIGAR库获得c ++中的CPU使用百分比,我写下面的代码试图获取这些信息,但有些事是错误的,我总是得到一个值0.3 ...而不是一个值在0%至100%之间。如何获得使用SIGAR库的CPU使用率百分比?
I'm trying to get the CPU usage percent in c++ using the SIGAR libraries, i wrote the code below to try to get this information, but something is wrong, i always got a value 0.3... instead of a value between 0% to 100 %. How to get the CPU usage percent with the SIGAR libraries?
#include <QDebug>
#include <sigar.h>
extern "C"
{
#include <sigar_format.h>
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
sigar_cpu_t cpu1;
sigar_cpu_t cpu2;
sigar_cpu_perc_t perc;
sigar_cpu_perc_calculate(&cpu1, &cpu2, &perc);
qDebug() << perc.combined;
return a.exec();
}
推荐答案
strong>:
我不是 Sigar
专家,这是我第一次听到它提到。从我从代码中可以看出, sigar_cpu_perc_calculate
根据cpu的两个快照之间的差异确定负载,不使用两个不同的CPU。
Edit:I am not a Sigar
expert, it's the first time I hear it mentioned. From what I could figure out from the code, sigar_cpu_perc_calculate
determines the load based on a difference between two "snapshots" of the cpu, not using two different CPUs.
我可以使用下面的方法看起来有些准确:
I was able to have something that looked somewhat accurate using the following:
sigar_t *sigar_cpu;
sigar_cpu_t old;
sigar_cpu_t current;
sigar_open(&sigar_cpu);
sigar_cpu_get(sigar_cpu, &old);
sigar_cpu_perc_t perc;
while(1)
{
sigar_cpu_get(sigar_cpu, ¤t);
sigar_cpu_perc_calculate(&old, ¤t, &perc);
std::cout << "CPU " << perc.combined * 100 << "%\n";
old = current;
Sleep(100);
}
sigar_close(sigar_cpu);
return 0;
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