Date: Thu, 12 Sep 1996 22:38:03 +0200 From: Poul-Henning Kamp <phk@critter.tfs.com> To: Steve Passe <smp@csn.net> Cc: Peter Wemm <peter@spinner.dialix.com>, rv@groa.uct.ac.za (Russell Vincent), freebsd-smp@freebsd.org, Terry Lambert <terry@lambert.org> Subject: Re: Intel XXpress - some SMP benchmarks Message-ID: <1690.842560683@critter.tfs.com> In-Reply-To: Your message of "Thu, 12 Sep 1996 14:04:27 MDT." <199609122004.OAA19225@clem.systemsix.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <199609122004.OAA19225@clem.systemsix.com>, Steve Passe writes: > >the simple indirection to get an int from a table of 16 ints is pretty cheap. >I suggest cleanup of any areas of code that repeatedly call macros like >curproc. I did a quick grep in /kern and found a few offenders like: > > curproc->p_flag |= P_PHYSIO; > >(I wonder if gcc will optimize this to only 1 APIC read?) Most of the >code does a 1 time assignment to a struct ptr via curproc and uses that. I actually thought of "stealing" one or two vectors in the LAPIC and cache curproc there... -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@ref.tfs.com TRW Financial Systems, Inc. Future will arrive by its own means, progress not so.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1690.842560683>