On Tue, Jul 20, 2010 at 10:45:58AM -0700, Brent Jones wrote: > On Tue, Jul 20, 2010 at 10:29 AM, Chad Cantwell <c...@iomail.org> wrote: > > No, this wasn't it. A non debug build with the same NIGHTLY_OPTIONS > > at Rich Lowe's 142 build is still very slow... > > > > On Tue, Jul 20, 2010 at 09:52:10AM -0700, Chad Cantwell wrote: > >> Yes, I think this might have been it. I missed the NIGHTLY_OPTIONS > >> variable in > >> opensolaris and I think it was compiling a debug build. I'm not sure what > >> the > >> ramifications are of this or how much slower a debug build should be, but > >> I'm > >> recompiling a release build now so hopefully all will be well. > >> > >> Thanks, > >> Chad > >> > >> On Tue, Jul 20, 2010 at 08:39:42AM +0100, Robert Milkowski wrote: > >> > On 20/07/2010 07:59, Chad Cantwell wrote: > >> > > > >> > >I've just compiled and booted into snv_142, and I experienced the same > >> > >slow dd and > >> > >scrubbing as I did with my 142 and 143 compilations and with the > >> > >Nexanta 3 RC2 CD. > >> > >So, this would seem to indicate a build environment/process flaw rather > >> > >than a > >> > >regression. > >> > > > >> > > >> > Are you sure it is not a debug vs. non-debug issue? > >> > > >> > > >> > -- > >> > Robert Milkowski > >> > http://milek.blogspot.com > >> > > > Could it somehow not be compiling 64-bit support? > > > -- > Brent Jones > br...@servuhome.net
I thought about that but it says when it boots up that it is 64-bit, and I'm able to run 64-bit binaries. I wonder if it's compiling for the wrong processor optomization though? Maybe if it is missing some of the newer SSEx instructions the zpool checksum checking is slowed down significantly? I don't know how to check for this though and it seems strange it would slow it down this significantly. I'd expect even a non-SSE enabled binary to be able to calculate a few hundred MB of checksums per second for a 2.5+ghz processor. Chad _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
