gistfile1.txt

# cat syscall_bench.c 
#define _GNU_SOURCE
#include <asm/unistd_64.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/syscall.h>

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char **argv)
{
  int n_threads = atoi(argv[2]), n_syscalls = atoi(argv[1]);
  unsigned long long i, j;
  int status;
  pid_t pid;

  for (j = 0; j < n_threads - 1; j++) {
    pid = fork();
    if (pid < 0)
      return 1;
    if (pid == 0)
      break;
  }

  for (i = 0; i < n_syscalls; i++) {
    syscall(__NR_clock_gettime, 1 << 31, NULL);
  }

  if (pid != 0) {
          for (j = 0; j < n_threads - 1; j++) {
            if  (wait(&status) == -1 || status != 0) {
              return 1;
            }
          }
  }
  printf("done\n");
  while (1)
          sleep(1000);
  return 0;
}
# gcc -Wall syscall_bench.c -o syscall_bench
# pgrep 'exe' | grep -v 2273389 | xargs -I '{}' cat /proc/{}/stat | awk '{print $14*10 " " $15*10; a+=$14+$15;} END { print "=" a*10 }'
=0
# n=1; for i in `seq $n`; do ./runsc --ignore-cgroups --network none do ./syscall_bench 1000000 2  & done
[1] 1782356
# done

# pgrep 'exe' | grep -v 2273389 | xargs -I '{}' cat /proc/{}/stat | awk '{print $14*10 " " $15*10; a+=$14+$15;} END { print "=" a*10 }'
120 20
6460 540
0 0
0 0
0 0
3550 2000
0 0
3530 2060
=18280
# kill %1
# 
[1]+  Exit 143                ./runsc --ignore-cgroups --network none do ./syscall_bench 1000000 2
# pgrep 'exe' | grep -v 2273389 | xargs -I '{}' cat /proc/{}/stat | awk '{print $14*10 " " $15*10; a+=$14+$15;} END { print "=" a*10 }'
=0
# 
# n=2; for i in `seq $n`; do ./runsc --ignore-cgroups --network none do ./syscall_bench 1000000 2  & done
[1] 1782528
[2] 1782529
# done
done

# pgrep 'exe' | grep -v 2273389 | xargs -I '{}' cat /proc/{}/stat | awk '{print $14*10 " " $15*10; a+=$14+$15;} END { print "=" a*10 }'
80 30
80 20
4960 190
5260 180
0 0
0 0
0 0
0 0
0 0
2300 1930
0 0
2510 1820
0 0
2420 1790
0 0
2390 1910
=27870
# kill %2
# kill %1
[2]+  Exit 143                ./runsc --ignore-cgroups --network none do ./syscall_bench 1000000 2
# 
[1]+  Exit 143                ./runsc --ignore-cgroups --network none do ./syscall_bench 1000000 2
# pgrep 'exe' | grep -v 2273389 | xargs -I '{}' cat /proc/{}/stat | awk '{print $14*10 " " $15*10; a+=$14+$15;} END { print "=" a*10 }'
=0