Messages in this thread | | | Date | Sat, 6 Dec 2003 09:20:11 +0100 | From | Willy Tarreau <> | Subject | Re: [PATCH] 2.4 read ahead never reads the last page in a file |
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Hi Chuck,
I've run 2.4.23 both vanilla and patched, and I confirm a win on NFS reads. I tested from 1 to 6 parallel reads consisting of md5sum of kernel includes : time find include -type f | xargs md5sum >/dev/null & Results below :
processes 2.4.23 2.4.23-patched 1 11.5 11.45 2 12.82 12.68 3 14.7 14.4 4 17.8 17.3 5 21.5 21.0 6 25.7 25.0 => server is saturated 100% sys 7 29.3 29.0 => server is saturated 100% sys
Fileset contain 7346 files totalizing 29952 kB. So there's a gain of nearly 3% in the best case (6 processes). Not bad. I suspect that I could also gain slightly more by patching the server too.
Cheers, Willy
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