> On 01 Mar 2017, at 21:57, Conrad Meyer <c...@freebsd.org> wrote: > > Hi Bruce, > > On my laptop (Intel(R) Core(TM) i5-3320M CPU — Ivy Bridge) I still see > a little worse performance with this patch.
Hi Bruce & Conrad, I gave both patches a try. It's a real use case, iSCSI throughput. Both target and initiator running FreeBSD 11, both patched. I read 100 times 10G from the same raw SSD device. Results in MB/s. (top10 is the average of the 10 higher values) # Without CRC32 : average : 300.3 std dev : 3.9 top10 : 308.6 max : 311.4 # With software CRC32 : average : 197.6 std dev : 6.5 top10 : 204.2 max : 204.9 # With Conrad CRC32 : average : 282.4 std dev : 9.1 top10 : 292.9 max : 293.3 # With Bruce CRC32 : average : 278.4 std dev : 7.8 top10 : 290.8 max : 292.5 The difference between the 2 patches is let's say almost non significant. CPU on both sides: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz Ben _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
