From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Thu, 17 Jun 2010 22:03:20 -0400 To: 9fans@9fans.net Message-ID: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] look ma, 16 x86 processors Topicbox-Message-UUID: 354b5c4e-ead6-11e9-9d60-3106f5b1d025 On Thu Jun 17 21:01:00 EDT 2010, ml@iridescent.org wrote: > What dual socket Mobo/chipset is that? > > I gather you got Hyperthreading to work as their are only 4 x 2 real cores, correct? > > leb > this motherboard happens to be a trenton technology ntm5600 with 2x E5540 4c/8t xeons that came with the motherboard. (all the high tech companies are in georgia these days.) i'm sure that you could plop 2 8-thread cpus in most common server motherboards with reasonable bios and have similar success. i did need to change MAXCPU to 16 and employ a bit of subterfuge, as there are no mp entries for the odd numbered threads, i needed to fake them. also, there is some plan 9 funkyness with apic ids >= 8, so starting the second 8 maches takes many seconds. > why cant it be two 8-core xeons? it could be a single 8c/16t xeon 7500 or two with ht turned off. but i've never tried the 7500-series. $2500 motherboards seem just a tad rich to me. - erik