Date: Thu, 9 May 2013 20:59:33 GMT From: Jason Keller <jkeller@bbiinternational.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/178467: Optimized Checksum Code for ZFS Message-ID: <201305092059.r49KxXG3077414@oldred.FreeBSD.org> Resent-Message-ID: <201305092100.r49L00uS034826@freefall.freebsd.org>
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>Number: 178467 >Category: misc >Synopsis: Optimized Checksum Code for ZFS >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Thu May 09 21:00:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Jason Keller >Release: 9.1 >Organization: BBI International >Environment: FreeBSD chewy 9.1-RELEASE-p3 FreeBSD 9.1-RELEASE-p3 #0: Mon Apr 29 18:27:25 UTC 2013 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 >Description: This isn't so much a problem as it is an RFE. Basically, the SHA256 checksum code within ZFS looks like it could use a little helping hand. On my limited testing, it would appear that Solaris 11 has at least a 20-25% edge in efficiency when doing SHA256 checksumming for ZFS. IANAP, but it would be extremely nice to be able to have the same (or better) efficiency for ZFS on FreeBSD. I have not done specific testing with Fletcher4, but that also seemed to be slightly better tuned in Solaris 11 as well. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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