Date: Tue, 26 Oct 2010 04:29:16 -0700 From: David Wolfskill <david@catwhisker.org> To: freebsd-performance@freebsd.org Subject: Re: Possible evidence of performance regression for 8.1-S (vs. 7.1) Message-ID: <20101026112916.GB2262@albert.catwhisker.org> In-Reply-To: <4CC662A1.9030708@freebsd.org> References: <20101020174854.GZ21226@albert.catwhisker.org> <4CBF8032.8000609@freebsd.org> <20101025165548.GE1519@albert.catwhisker.org> <4CC662A1.9030708@freebsd.org>
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--H1spWtNR+x+ondvy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Oct 25, 2010 at 10:09:53PM -0700, Julian Elischer wrote: > ... > >It appears to me that the last test runs show results that are just > >about identical to the "native" 8.1-S kernel+userland, so if I > >understand the logic correctly, that appears to implicate something in > >the 8.1-S kernel (or the default configuration for same). >=20 > yes, exactly. Good to get confirmation; thanks. :-} > however the interesting thing is that while it took more wall-clock time, > it took less system and user time. Aye; Dan Nelson also pointed that out, and it is rather interesting. > you might try the 4bsd scheduler to see what that does.. OK -- but we were using the default scheduler in each case. The basic point I'm making here is the apparent performance regression for similarly-configured systems under 7.1 vs. 8.1. > also, compare the configs of the two kernels Well, under 7.1, we used the MAC kernel config; since that didn't exist for 8.x, I used GENERIC for it. (We had used GENERIC under 7.1 until a certain application we use required MAC support. I haven't tried to make that application work under 8.x yet, as there are plans to deprecate its use.) Peace, david --=20 David H. Wolfskill david@catwhisker.org Depriving a girl or boy of an opportunity for education is evil. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --H1spWtNR+x+ondvy Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (FreeBSD) iEYEARECAAYFAkzGu4sACgkQmprOCmdXAD1fXgCfTHLzXJMJOOMwZvHzf118fbWp IyQAniUdlrey0PrmwkFDmPgzlmUkugtc =aVNY -----END PGP SIGNATURE----- --H1spWtNR+x+ondvy--
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