Date: Sun, 3 Jul 2011 04:07:04 +0530 From: "Jayachandran C." <c.jayachandran@gmail.com> To: Attilio Rao <attilio@freebsd.org> Cc: Warner Losh <imp@freebsd.org>, freebsd-mips@freebsd.org Subject: Re: Bumping MAXCPU for MIPS configurations Message-ID: <BANLkTikF8MRXV7sajRZCg_Va4JbvsepnYw@mail.gmail.com> In-Reply-To: <BANLkTimiayq1yExjLSobDhHK0mSAOdXkKA@mail.gmail.com> References: <BANLkTima1XC-K0d2gY=hRSb1BGE_TX2rZw@mail.gmail.com> <BANLkTik%2Bhz-S=umvmy99SScypNg8JFfRWg@mail.gmail.com> <BANLkTimiayq1yExjLSobDhHK0mSAOdXkKA@mail.gmail.com>
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On Wed, Jun 29, 2011 at 4:48 PM, Attilio Rao <attilio@freebsd.org> wrote: > 2011/6/29 Jayachandran C. <c.jayachandran@gmail.com>: >> On Wed, Jun 29, 2011 at 3:10 PM, Attilio Rao <attilio@freebsd.org> wrote= : >>> [ Please CC me in replies as I'm not subscribed to this mailing list ] >>> >>> I'm planning to bump MAXCPU for all the kernel configurations >>> requiring it, as long as the latest cut of largeSMP changes is >>> completed. >>> >>> Anyway, I'm not really sure what MIPS configurations may benefit from >>> a larger number of MAXCPU. Probabilly XLP should, for what I've heard, >>> but I'd like to get a precise mapping between configurations that want >>> to bump the number and the actual maximum number of CPUs to be >>> supported. >> >> An XLP SoC has 32 cpus (8cores x 4 hw threads per core), and 4 of >> these can be interconnected to have upto 128 cpus. =A0We have an XLP >> port running on one chip with 32cpus, but there is interest in trying >> out 2 chip (64cpus) and 4 chip(128 cpus) configurations, so this is >> something I want to do when I get access to multi-chip boards for >> FreeBSD development. > > I'll bump MAXCPU to 128 for XLP then, thanks. > Do you have informations about XLR? For XLR the the MAXCPU should be 32 (8 cores x 4 threads per core on the SoC). We cannot connect multiple chips together like the XLP. JC.
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