On Mon, Nov 06 2006, Chen, Kenneth W wrote:
> I haven't done the measurement whether the time to submit I/O grows
> linearly with respect to I/O size. Most likely it will. If it is
> not, then we might have a scaling problem (though I don't believe we
> have this problem).
I would not expect it to, but ran a simple test to check submission
times from 32KiB to 2MiB:
Size Time (usecs)
----------------------------
2MiB 223
1MiB 112
512KiB 56
256KiB 29
128KiB 14
32KiB 4
(note that I skipped 64KiB, things got boring). That clearly shows a
linear increase in time, so no scaling problem there.
--
Jens Axboe
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