Date: Tue, 16 Jan 2007 23:54:03 +0100 From: "Attilio Rao" <attilio@freebsd.org> To: "Ivan Voras" <ivoras@fer.hr> Cc: freebsd-current@freebsd.org, freebsd-arch@freebsd.org Subject: Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs Message-ID: <3bbf2fe10701161454m74bd9356i3999187515c60596@mail.gmail.com> In-Reply-To: <eoji7s$cit$2@sea.gmane.org> References: <3bbf2fe10607250813w8ff9e34pc505bf290e71758@mail.gmail.com> <3bbf2fe10607250814m1a476f09p2d962dedc0c99be1@mail.gmail.com> <200607251232.51230.jhb@freebsd.org> <3bbf2fe10607251004wf94e238xb5ea7a31c973817f@mail.gmail.com> <3bbf2fe10607261127p3f01a6c3w80027754f7d4e594@mail.gmail.com> <3bbf2fe10607281004o6727e976h19ee7e054876f914@mail.gmail.com> <3bbf2fe10701160851r79b04464m2cbdbb7f644b22b6@mail.gmail.com> <20070116154258.568e1aaf@pleiades.nextvenue.com> <b1fa29170701161355lc021b90o35fa5f9acb5749d@mail.gmail.com> <eoji7s$cit$2@sea.gmane.org>
next in thread | previous in thread | raw e-mail | index | archive | help
2007/1/16, Ivan Voras <ivoras@fer.hr>: > Kip Macy wrote: > > x86 pre-P4 had 32-byte cache lines. Thus older processors will not benefit. > > But it does seem to hurt the performance a bit - maybe it's time to add > another CPU option like I586_CPU and I686_CPU? Well, it is my feeling that probabilly the align_cache parameter should be a run-time settled parameter (in particular for ia32 CPUs which changed a lot along the years). Attilio -- Peace can only be achieved by understanding - A. Einstein
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3bbf2fe10701161454m74bd9356i3999187515c60596>