Dear all,
I've used LMBench to benchmark context switch between 2.4 and 2.6, and
found an interesting thing that
when the thread size is between 0~1024KByte, the switching time increased as
everyone predicted, however, when
bigger than 2M, it sharply decreased, like this:
256Kbyte/4 Processes: 47.3 ms
512Kbyte/4 Processes: 140.97 ms
1MByte/4 Processes: 142.63 ms
2MByte/4 Processes: 17.88 ms
4M----------------: 17.25 ms
8M----------------: 10.00 ms
when at a Linux 2.4 in the same PC:
512K/4P: 155.06 ms
1M/4P: 153.09 ms
2M/4P: 74.71 ms
4M/4P: 132.84 ms
8M/4P: 809.36 ms
I'm very comfused at this result, could anyone know something about that? Thank
you very much!
Sincerely, Brooks
2007-05-18
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