30 lines
919 B
C
30 lines
919 B
C
#include <sys/times.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/wait.h>
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int main(void) {
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struct tms start_times;
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struct tms cease_times;
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times(&start_times);
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int pid = fork();
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if (pid == 0) {
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printf("This is a child process!\n");
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for (int i = 0; i < 300000; i += 1) {
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printf("Got a number %d\n", i);
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}
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_exit(1);
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}
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waitpid(pid, NULL, 0);
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times(&cease_times);
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printf(" user time: %lf\n", (double) (cease_times.tms_utime - start_times.tms_utime) / sysconf(_SC_CLK_TCK));
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printf("system time: %lf\n", (double) (cease_times.tms_stime - start_times.tms_stime) / sysconf(_SC_CLK_TCK));
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printf(" user time: %lf\n", (double) (cease_times.tms_cutime - start_times.tms_cutime) / sysconf(_SC_CLK_TCK));
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printf("system time: %lf\n", (double) (cease_times.tms_cstime - start_times.tms_cstime) / sysconf(_SC_CLK_TCK));
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}
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