Date: Mon, 15 May 2006 20:24:42 -0700 From: Nate Lawson <nate@root.org> To: Maxim Sobolev <sobomax@FreeBSD.org> Cc: "current@freebsd.org" <current@FreeBSD.org>, John Baldwin <jhb@FreeBSD.org> Subject: Re: SMP on MacBook Pro, some new info Message-ID: <446945FA.7020103@root.org> In-Reply-To: <4467B75F.2030406@FreeBSD.org> References: <4467B75F.2030406@FreeBSD.org>
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Maxim Sobolev wrote: > Hi, > > I have discovered that it's possible with a very good repeatability (90% > or more) to start the second core by pressing power button promptly > during the 5 second period when BSP have sent startup IPIs already and > is waiting for the AP going online. I am not sure how to interpret this > info - perhaps there is some problem with caching BSPs LAPIC writes, and > interrupt generated by the power button causes the cache to be flushed. > > Any ideas? My completely unresearched opinion is that the IPI is not reaching the AP or the response is getting lost. I don't know why. -- Nate
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