Messages in this thread | | | Date | Tue, 31 Oct 2006 13:46:46 -0500 | From | "Holden Karau" <> | Subject | Re: [PATCH 1/1] fat: improve sync performance by grouping writes revised |
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The performance increase is pretty small. Using an old external dirve I had lying around I got: diff -y stock/10k modified/10k 10240+0 records in | 1024+0 records in 10240+0 records out | 1024+0 records out 5242880 bytes transferred in 18.280922 seconds (286795 bytes/ | 524288 bytes transferred in 1.824985 seconds (287283 bytes/se diff -y stock/1k modified/1k 1024+0 records in 1024+0 records in 1024+0 records out 1024+0 records out 524288 bytes transferred in 1.777250 seconds (295000 bytes/se | 524288 bytes transferred in 1.764748 seconds (297089 bytes/se
The usual disclaimer of any benchmarking applies, YMMV.
Cheers,
Holden :-)
On 10/31/06, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> wrote: > Holden Karau <holdenk@xandros.com> writes: > > > From: Holden Karau <holden@pigscanfly.ca> http://www.holdenkarau.com > > This is an attempt at improving fat_mirror_bhs in sync mode [namely it > > writes all of the data for a backup block, and then blocks untill > > finished]. The old behavior would write & block in smaller chunks, so > > this should be slightly faster. It also removes the fix me requesting > > that it be fixed to behave this way :-) > > Please post the result of performance test. If it's fairly big, we > would be able to use async for mirror FAT. Instead, for hotplug device > we can provide the another option. > -- > OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> >
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