Date: Mon, 03 Feb 2003 13:22:34 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: "Paul J. White" <pjwhite@electrongate.com> Cc: freebsd-smp@FreeBSD.ORG Subject: RE: cvs commit: src/sys/i386/i386 mp_machdep.c Message-ID: <XFMail.20030203132234.jhb@FreeBSD.org> In-Reply-To: <5.1.0.14.2.20030203101241.00a22b20@willow.he.net>
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On 03-Feb-2003 Paul J. White wrote: > I have been running with this patch for a couple of days now, and though I > did notice a small increase in speed (running seti@home), I have had two > complete system freezes so far. The screen freezes, with no response to > keyboard, no response to telnet from another machine. Prior to patching I > have not experienced this problem at all. > > The machine is a dual Pentium Pro (200MHz) PR440FX, running 4.7-RELEASE. > I typically run two instances of setiathome, XFree86 4.2, and XScreensaver. Hmm, ok. That is not good. :( I'll look at it and see if I can isolate the freezes to a particular part of the change. > -- Paul White > > At 17:19 2003-01-31 -0500, John Baldwin wrote: > >>On 30-Jan-2003 John Baldwin wrote: >> > >> > On 30-Jan-2003 John Baldwin wrote: >> >> jhb 2003/01/30 08:38:17 PST >> >> >> >> Modified files: (Branch: RELENG_4) >> >> sys/i386/i386 mp_machdep.c >> >> Log: >> >> MFC: Basic support for Hyperthreading. This uses the values from >> cpuid to >> >> enmuerate logical CPUs. >> >> >> >> Requested heavily by: ps >> > >> > I highly recommend turning on machdep.cpu_idle_hlt for HTT boxes as it >> > provides a noticable performance improvement. I'm still testing some >> > other patches to rework the locking code in 4.x to make use of the pause >> > instruction and be more intelligent about spinning on locks in general. >> >>Well, the pause instruction does seem to be helping considerably. I'd >>like for people to test this patch on SMP machines running 4.x, not just >>Pentium 4's with HT but P3's, PPro's, etc. as well. >> >>http://www.FreeBSD.org/~jhb/patches/htt.patch >> >>Thanks. >> >>-- >> >>John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ >>"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ >> >>To Unsubscribe: send mail to majordomo@FreeBSD.org >>with "unsubscribe freebsd-smp" in the body of the message > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-smp" in the body of the message -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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