On Mon, 2011-04-11 at 14:35 -0300, Arnaldo Carvalho de Melo wrote:
>
> Can you check if the patch below fixes this? An acked-by or tested-by
> tag would be mucho appreciated.
>
Didn't work..
# ./perf stat ~/loop_1b_instructions-4x
Performance counter stats for '/root/loop_1b_instructions-4x':
288.908743 task-clock-msecs # 0.444 CPUs
51 context-switches # 0.000 M/sec
1 CPU-migrations # 0.000 M/sec
116 page-faults # 0.000 M/sec
715,288,186 cycles # 2475.827 M/sec (scaled from 49.77%)
1,000,703,570 instructions # 1.399 IPC (scaled from 64.61%)
100,255,005 branches # 347.013 M/sec (scaled from 56.19%)
11,453 branch-misses # 0.011 % (scaled from 65.27%)
26,089 cache-references # 0.090 M/sec (scaled from 43.82%)
110 cache-misses # 0.000 M/sec (scaled from 36.35%)
0.649991199 seconds time elapsed
That wants to have 4b insn
---
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
main ()
{
int i;
fork();
fork();
for (i = 0; i < 100000000; i++) {
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
asm("nop");
}
wait(NULL);
wait(NULL);
wait(NULL);
wait(NULL);
}
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