Messages in this thread |  | | From | "DICKENS,CARY (HP-Loveland,ex2)" <> | Subject | RE: Kernel performance in reference to 2.4.5pre1 | Date | Thu, 18 Oct 2001 15:38:54 -0400 |
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I'll put this on my priority list to look into. When I get the numbers, I'll squeak again.
Thanks, Cary
> -----Original Message----- > From: Andrew Morton [mailto:akpm@zip.com.au] > Sent: Thursday, October 18, 2001 12:34 PM > To: DICKENS,CARY (HP-Loveland,ex2) > Cc: Kernel Mailing List (E-mail); HABBINGA,ERIK (HP-Loveland,ex1) > Subject: Re: Kernel performance in reference to 2.4.5pre1 > > > "DICKENS,CARY (HP-Loveland,ex2)" wrote: > > > > 2.4.5pre1 is the base for comparison, > > > > [ figures showing that more recent kernels suck ] > > > > 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. > > We don't know whether this slowdown is caused by changes in the VM, > the filesystem, the block device layer, nfsd or networking. > For example, > ksoftirqd was introduced between 2.4.5 and 2.4.7. Could it be that? > > For all these reasons it would be really helpful if you could > go back and test the 2.4.6-preX and 2.4.7-preX kernels (binary search) > and tell us if there was a particular release which caused > this decrease in > throughput. > > If it can be pinned down to a particular patch then there's a good > chance that it can be fixed. > - 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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