Date: Mon, 03 Feb 2003 10:25:14 -0700 From: "Paul J. White" <pjwhite@electrongate.com> To: John Baldwin <jhb@FreeBSD.ORG> Cc: freebsd-smp@FreeBSD.ORG Subject: RE: cvs commit: src/sys/i386/i386 mp_machdep.c Message-ID: <5.1.0.14.2.20030203101241.00a22b20@willow.he.net> In-Reply-To: <XFMail.20030131171934.jhb@FreeBSD.org> References: <XFMail.20030130114117.jhb@FreeBSD.org>
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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. -- 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
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