Date: Thu, 18 Jan 2001 10:41:30 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: Julian Elischer <julian@elischer.org> Cc: rjesup@wgate.com, arch@FreeBSD.org, current@FreeBSD.org, Alfred Perlstein <bright@wintelcom.net>, Peter Wemm <peter@netplex.com.au>, Soren Schmidt <sos@freebsd.dk> Subject: Re: HEADS-UP: await/asleep removal imminent Message-ID: <XFMail.010118104130.jhb@FreeBSD.org> In-Reply-To: <3A6732EF.C83945CA@elischer.org>
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On 18-Jan-01 Julian Elischer wrote: > Soren Schmidt wrote: >> >> It seems Peter Wemm wrote: >> > >> > Soren, can you retest a buildworld with the currently committed kernel >> > with no other changes? Let us see if the forward_signal() stuff is the >> > culprit, and if not, try adding just the i386/i386/machdep.c patch to HLT >> > the idle CPU. (if *that* makes a difference then we have got trouble!) >> >> It seems that the HLT thing is exactly the patch that makes it work! >> >> So we have trouble, I said that all along .5 :) > > I don't know about your system but mine gets a LOT warmer > when HALT is disabled. We don't IPI a hlt'd CPU in setrunqueue() right now, so once a CPU is HLT'd it stays idle until the I/O APIC sends it an interrupt to handle. I've watched top(1) during a buildworld with this enabled and have seen it with 8 processes in SRUN, but one CPU idle. :( Also, FWIW, the quad xeon doesn't use this patch and has run fine for several days now. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "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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