Date: Thu, 02 May 2002 10:16:31 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Jonathan Mini <mini@freebsd.org> Cc: freebsd-smp@FreeBSD.ORG, Andrew Gallatin <gallatin@cs.duke.edu> Subject: Re: hlt when idle? Message-ID: <XFMail.20020502101631.jhb@FreeBSD.org> In-Reply-To: <20020501151123.G30080@stylus.haikugeek.com>
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On 01-May-2002 Jonathan Mini wrote: > Andrew Gallatin [gallatin@cs.duke.edu] wrote : >> > No, the interrupts seem to be round-robin, but each clock intr is only >> > sent to one CPU unlike on alpha where they are broadcast. >> >> So each CPU gets (1/num_cpu) * hz clock interrupts/sec? > > Yes, but because the timer is set to num_cpu*hz, each CPU ends up getting > the normal hz interrupts. That's why it runs round-robin but looks like a > broadcast. Eh, are you talking about the Alpha? On x86 we don't do this and have to use IPI's to simulate a broadcast-type deal. -- 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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