40 lines
776 B
C
40 lines
776 B
C
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#include <inc/lib.h>
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volatile int counter;
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void
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umain(int argc, char **argv)
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{
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int i, j;
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int seen;
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envid_t parent = sys_getenvid();
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// Fork several environments
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for (i = 0; i < 20; i++)
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if (fork() == 0)
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break;
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if (i == 20) {
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sys_yield();
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return;
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}
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// Wait for the parent to finish forking
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while (envs[ENVX(parent)].env_status != ENV_FREE)
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asm volatile("pause");
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// Check that one environment doesn't run on two CPUs at once
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for (i = 0; i < 10; i++) {
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sys_yield();
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for (j = 0; j < 10000; j++)
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counter++;
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}
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if (counter != 10*10000)
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panic("ran on two CPUs at once (counter is %d)", counter);
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// Check that we see environments running on different CPUs
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cprintf("[%08x] stresssched on CPU %d\n", thisenv->env_id, thisenv->env_cpunum);
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}
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