From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] look ma, 16 x86 processors
Date: Thu, 17 Jun 2010 22:03:20 -0400 [thread overview]
Message-ID: <ef44662a4737858c2446c898163e92bb@kw.quanstro.net> (raw)
In-Reply-To: <p06240803c84074781e8c@[192.168.0.7]>
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
next prev parent reply other threads:[~2010-06-18 2:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-18 0:01 erik quanstrom
2010-06-18 0:26 ` andrey mirtchovski
2010-06-18 15:36 ` erik quanstrom
2010-06-18 0:59 ` Lawrence E. Bakst
2010-06-18 2:03 ` erik quanstrom [this message]
[not found] ` <p06240803c84074781e8c@192.168.0.7>
2010-06-18 1:11 ` Tharaneedharan Vilwanathan
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