On 07/21/2011 12:22 AM, Sasha Levin wrote:
> > Some numbers, please. > I'm not sure how to measure performance in this case. You'd need to measure access times to each device before and after the patch, and average them.
Try registering ~100 PIO ioeventfds, and writing a test case which accesses a PIO port that misses all of them, in a loop. Measure your exit rate before an after.
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