Date: Fri, 24 May 2002 11:10:15 -0400 (EDT) From: Kenneth Culver <culverk@alpha.yumyumyum.org> To: John Baldwin <jhb@FreeBSD.ORG> Cc: current@FreeBSD.ORG Subject: Re: Please test PAUSE on non-Intel processors Message-ID: <20020524110942.X67260-100000@alpha.yumyumyum.org> In-Reply-To: <XFMail.20020524102553.jhb@FreeBSD.org>
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I tested this on my T-bird athlon 800, and this is the result: Testing PAUSE instruction: Register esp changed: 0xbfbffb38 -> 0xbfbffafc So I guess there's no problem. Ken On Fri, 24 May 2002, John Baldwin wrote: > Hey gang, although Intel's document seems to claim that they tested > proper operation of pause I'd like people with non-Intel processors > to verify that it actually works. Please compile the attached test > program and run it. The output should look like this: > > > ./pt > Testing PAUSE instruction: > Register esp changed: 0xbfbff9fc -> 0xbfbff9c0 > > If you get a signal or any of the other registers change their value, > please let me know. I've tested this on a Pentium III mobile, a K6-II, > and an Athlon. The program cmopiles ok on both stable and current. > > -----FW: <200205212226.g4LMQaV68801@freefall.freebsd.org>----- > > Date: Tue, 21 May 2002 15:26:36 -0700 (PDT) > Sender: owner-cvs-committers@FreeBSD.org > From: John Baldwin <jhb@FreeBSD.org> > To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org > Subject: cvs commit: src/sys/kern kern_mutex.c > > jhb 2002/05/21 15:26:36 PDT > > Modified files: > sys/kern kern_mutex.c > Log: > Add appropriate IA32 "pause" instructions to improve performanec on > Pentium 4's and newer IA32 processors. The "pause" instruction has been > verified by Intel to be a NOP on all currently existing IA32 processors > prior to the Pentium 4. > > Revision Changes Path > 1.95 +17 -1 src/sys/kern/kern_mutex.c > > --------------End of forwarded 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-current" in the body of the message
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