Date: Fri, 31 Jan 2003 21:47:10 -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: <5.0.2.1.2.20030131214118.01feeae0@willow.he.net> In-Reply-To: <XFMail.20030131171934.jhb@FreeBSD.org> References: <XFMail.20030130114117.jhb@FreeBSD.org>
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I applied this patch to my 4.7 RELEASE system, running on a dual Pentium Pro (PR440FX) system, and, so far, so good. Output from dmesg available upon request. I run two instances of seti@home on this machine, and after it's had time to run for a while, I'll report back on any improvements in processing speed, or problems that might come up. Thanks, Paul White At 17:19 03-01-31 -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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