Some of you may recall my complaints in July about very poor Solaris
10 performance when re-reading large collections of medium-sized (5MB)
files, and recall verifying the situation on your own systems
(including OpenSolaris). I now have an IDR installed under Solaris
10U8 which includes a fix for this problem. I am told that the fix
will likely appear within the next month or two as a Solaris 10 kernel
patch.
While first-read performance has not improved, the re-read performance
improvement due to the fix is quite dramatic:
U8 Baseline (Generic_141445-09)
===============================
Doing initial (unmount/mount) 'cpio -C 131072 -o > /dev/null'
144000768 blocks
real 8m35.46s
user 0m4.21s
sys 1m16.30s
Doing second 'cpio -C 131072 -o > /dev/null'
144000768 blocks
real 35m35.85s
user 0m4.66s
sys 1m25.63s
U8 + IDR143158-03
=================
Doing initial (unmount/mount) 'cpio -C 131072 -o > /dev/null'
144000768 blocks
real 8m39.18s
user 0m4.47s
sys 1m26.90s
Doing second 'cpio -C 131072 -o > /dev/null'
144000768 blocks
real 8m36.04s
user 0m4.46s
sys 1m19.58s
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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