关于setitimer后，收不到SIGVTALRM和SIGPROF的问题

junecl

代码来自百度百科：http://baike.baidu.com/view/6339376.htm

环境是redhat kernel是2.6.9

问题是：为什么收不到SIGVTALRM信号？谢谢

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include <sys/time.h>
int sec;
void sigroutine(int signo){
switch (signo){
case SIGALRM:
printf("Catch a signal -- SIGALRM /n";
signal(SIGALRM, sigroutine);
break;
case SIGVTALRM:
printf("Catch a signal -- SIGVTALRM /n";
signal(SIGVTALRM, sigroutine);
break;
}
return;
}
int main()
{
struct itimerval value, ovalue, value2; //(1)
sec = 5;
printf("process id is %d/n", getpid());
signal(SIGALRM, sigroutine);
signal(SIGVTALRM, sigroutine);
value.it_value.tv_sec = 1;
value.it_value.tv_usec = 0;
value.it_interval.tv_sec = 1;
value.it_interval.tv_usec = 0;
setitimer(ITIMER_REAL, &value, &ovalue); //(2)
value2.it_value.tv_sec = 0;
value2.it_value.tv_usec = 500000;
value2.it_interval.tv_sec = 0;
value2.it_interval.tv_usec = 500000;
setitimer(ITIMER_VIRTUAL, &value2, &ovalue);
for(;
;
}

weishuo1999

centos下是能收到的，是不是系统有限制？

junecl

不知道是不是内核版本的问题？你的是什么版本？谢谢