The Linux 2.6 kernel will have the ability to set CPU affinity for specific processes. There is a patch for the 2.4 kernel at http://www.kernel.org/pub/linux/kernel/people/rml/cpu-affinity
RedHat 9 already has support for CPU affinity build in. The July 2003 issue of Linux Journal includes a little C program (on page 20) that gives you a shell level interface to the CPU affinity system calls, so you can dynamically assign processes to specific CPUs. I haven't tried it, but it looks very cool (my only SMP machine is in production, and I don't want to mess with it). If you try it out, please share your experiences with the list. Jord Tanner Independent Gecko Consultants On Tue, 2003-07-22 at 10:10, SZUCS Gábor wrote: > "by default" -- do you mean there is a way to tell Linux to favor the second > real cpu over the HT one? how? > > G. > ------------------------------- cut here ------------------------------- > ----- Original Message ----- > From: "Bruce Momjian" <[EMAIL PROTECTED]> > Sent: Tuesday, July 22, 2003 6:26 PM > Subject: Re: [PERFORM] Dual Xeon + HW RAID question > > > > Right, I simplified it. The big deal is whether the OS favors the > > second real CPU over one of the virtual CPU's on the same die --- by > > default, it doesn't. Ever if it did work perfectly, you are talking > > about going from 1 to 1.4 or 2 to 2.8, which doesn't seem like much. > > > ---------------------------(end of broadcast)--------------------------- > TIP 8: explain analyze is your friend -- Jord Tanner <[EMAIL PROTECTED]> ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly