Messages in this thread |  | | From | Andreas Dilger <> | Date | Thu, 18 Oct 2001 14:17:14 -0600 | Subject | Re: Kernel performance in reference to 2.4.5pre1 |
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Andrew Morton [mailto:akpm@zip.com.au] wrote: > SFS is a rather specialised workload, and synchronous NFS exports > are not a thing which gets a lot of attention. It could be one > small, hitherto unnoticed change which caused this performance > regression. And it appears that the change occurred between 2.4.5 > and 2.4.7.
Cary, also note that Andrew did some work with ext3 which can greatly improve the performance of synchronous I/O. Granted, it doesn't fix any performance issues in the VM or VFS that may have been introduced, but if you are looking for good benchmark numbers, give ext3 a try.
Use a large journal to avoid journal flushes for sync I/O. See: http://marc.theaimsgroup.com/?l=linux-kernel&m=99650624414465&w=4
Cheers, Andreas -- Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry?" http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert
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