This is a transcription of the test program from the youtube video:
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char **argv) {
int children = 0;
int status;
int i = 0;
if (argc < 2) {
printf("Usage: %s <children<\n", argv[0]);
return 1;
}
children = atoi(argv[1]);
for (i = 0; i < children; i++) {
printf("Starting child %d\n", i);
if (fork() == 0) {
fprintf(stderr, "child%d up %d\n", i, getpid());
while (1) {
/* Nothing, just spin */
}
} else {
// parent continues
}
}
wait(&status);
return 0;
}
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https://bugs.launchpad.net/bugs/708920
Title:
Strange 'fork/clone' blocking behavior under high cpu usage on EC2
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