getcpu.cxx

来自「HPunix下资源监视程序,查看监视进程的CPU、内存的参数」· CXX 代码 · 共 49 行

#include <sys/param.h>
#include <sys/pstat.h>
#include <stdlib.h>
#include <unistd.h>
int main()
{
	struct pst_dynamic psd;
	struct pst_processor *psp,*psp_last;
	float cpu_iddle;
	_T_ULONG_T temp_iddle,temp_user,temp_sys;
	if (pstat_getdynamic(&psd, sizeof(psd), (size_t)1, 0) == -1) 
	{
		perror("pstat_getdynamic error!");
		return -1;
	}
	size_t nspu = psd.psd_proc_cnt;
	psp = (struct pst_processor *) malloc(nspu * sizeof(struct pst_processor));
	psp_last = (struct pst_processor *) malloc(nspu * sizeof(struct pst_processor));
	//////////////////
	if (pstat_getprocessor(psp_last, sizeof(struct pst_processor), nspu, 0)  == -1) 
		perror("pstat_getdynamic");
	sleep(2);
	for(;;)		       
	{
		if (pstat_getprocessor(psp, sizeof(struct pst_processor), nspu, 0)  != -1) 
		{
       			int i;
			cpu_iddle=0;
			for (i = 0; i < nspu; i++) 
			{
	       			temp_iddle=labs(psp[i].psp_idlecycles.psc_lo-psp_last[i].psp_idlecycles.psc_lo);
	       			temp_user=labs(psp[i].psp_usercycles.psc_lo-psp_last[i].psp_usercycles.psc_lo);
	       			temp_sys=labs(psp[i].psp_systemcycles.psc_lo-psp_last[i].psp_systemcycles.psc_lo);
				//iddle[i]=(float)temp_iddle/(float)(temp_iddle+temp_user+temp_sys);	
				cpu_iddle+=(float)temp_iddle/(float)(temp_iddle+temp_user+temp_sys);	
				psp_last[i].psp_idlecycles.psc_lo=psp[i].psp_idlecycles.psc_lo;
				psp_last[i].psp_usercycles.psc_lo=psp[i].psp_usercycles.psc_lo;
				psp_last[i].psp_systemcycles.psc_lo=psp[i].psp_systemcycles.psc_lo;
			}
			printf("cpu iddle is %4.2f\n",cpu_iddle*100/nspu);
	 	}
		else
	       		perror("pstat_getdynamic");
		sleep(2);
	}

}