Messages in this thread | | | Date | Sat, 10 Sep 2005 21:56:15 +1000 | From | Anthony Wesley <> | Subject | Re: kernel 2.6.13 buffer strangeness - ext2/3/reiser4/xfs comparison |
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Andrew Morton wrote:
> Anthony Wesley <awesley@acquerra.com.au> wrote: > >>I compared ext2,ext3,xfs,vfat,reiser and reiser4. >> >> The hands-down winner was ext2. All the others showed problems of either lower disk throughput >> or dropped frames during video capture. > > > ext2 is a good filesystem. For that sort of application all the journaling > gunk can really get in the way. > > You should have tested ext3 with data=writeback. >
Ask and ye shall receive...
I created an ext3 fs, mounted it with data=writeback and gave it a quick spin.
The result? Lots of pauses and dropped frames during capture. This is during the part of the process where I have gobs of free RAM that's being used for buffering so dropping frames here is a cardinal sin.
Dunno why it's happening, but I saw it also with xfs and reiser4. ext2 on the other hand chugs along happily, no pauses, no dropped frames until we run out of free RAM (takes about 2 minutes now after the simple kernel change).
I can understand dropped frames after we run out of ram, but not before.
regards, Anthony
-- Anthony Wesley Director and IT/Network Consultant Smart Networks Pty Ltd Acquerra Pty Ltd
Anthony.Wesley@acquerra.com.au Phone: (02) 62595404 or 0419409836 - 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/
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