lkml.org 
[lkml]   [2006]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: async I/O seems to be blocking on 2.6.15
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-10 10:25    [W:0.467 / U:0.296 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site