Date: Thu, 26 Oct 2006 18:55:20 -0600 From: Scott Long <scottl@samsco.org> To: David Xu <davidxu@freebsd.org> Cc: freebsd-current@freebsd.org, John Birrell <jb@what-creek.com>, current@freebsd.org Subject: Re: HEADSUP: KSE about to become a kernel option Message-ID: <454158F8.9010200@samsco.org> In-Reply-To: <200610270851.39444.davidxu@freebsd.org> References: <20061026213343.GA29160@what-creek.com> <20061026233330.GC29909@what-creek.com> <200610270851.39444.davidxu@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
David Xu wrote: > On Friday 27 October 2006 07:33, John Birrell wrote: >> [ replying to myself ] >> >> On Thu, Oct 26, 2006 at 09:33:43PM +0000, John Birrell wrote: >>> If you use a GENERIC kernel, then this change won't affect you >>> because the KSE option will be on by default in GENERIC on >>> all arches/machines except sun4v (which doesn't handle signals >>> properly with the KSE code in the kernel). >> scottl persuaded me to add the KSE option to DEFAULTS on all >> arches/machines (except sun4v) to avoid causing the same problem >> that the io/mem change from default to optional caused. >> >> This means that ou will get KSE by default in your kernel (as >> before it was an option) _unless_ you use add 'nooption KSE' >> to your kernel config. >> >> This isn't my preferred solution because it makes it too >> transparent, however scottl's point is that unnecessary grief >> will be caused if the change isn't completely transparent. >> >> Sorry for the confusion. >> >> And BTW, the commits are all in current now...and coming to >> a cvsup server near you. >> >> -- >> John Birrell > > By compiling kernel without KSE option, super-smack's select-key.smack with > 10 clients on Athlon64 dual-core 3800+ breaks 31000 q/s, otherwise it can only > get 29000 q/s. Mysql version is 5.0.24a, FreeBSD AMD64. > I assume that you were using libthr for both the before and after tests? Scott
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?454158F8.9010200>