Date: Mon, 9 Aug 2010 22:56:10 +0000 (UTC) From: Ivan Voras <ivoras@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern vfs_cluster.c Message-ID: <201008092256.o79MuI7M027871@repoman.freebsd.org>
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ivoras 2010-08-09 22:56:10 UTC
FreeBSD src repository
Modified files:
sys/kern vfs_cluster.c
Log:
SVN rev 211126 on 2010-08-09 22:56:10Z by ivoras
Bumping the read-ahead count once more, to value equivalent to 512 KiB on
most system, based on benchmark results on a low-end fibre channel SAN
under VMWare:
vfs.read_max read performance
8 (historical default) 83 MB/s
16 (recent bump) 131 MB/s
32 (this version) 152 MB/s
64 157 MB/s
(results are +/- 3 MB/s)
As read-ahead is heuristic, based on past IO requests, it shouldn't be
problematic. The new default is still smaller then in other OSes.
Revision Changes Path
1.182 +1 -1 src/sys/kern/vfs_cluster.c
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