From: Cort Dougan <cort@fsmlabs.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Holger Bettag <hobold@Informatik.Uni-Bremen.DE>,
Robert E Brose II <bob@kunk.jriver.com>,
linuxppc-dev@lists.linuxppc.org
Subject: Re: Dual G3's in Umax S900?
Date: Thu, 2 May 2002 10:12:57 -0600 [thread overview]
Message-ID: <20020502101257.C26017@host110.fsmlabs.com> (raw)
In-Reply-To: <20020502131439.13109@smtp.adsl.oleane.com>; from benh@kernel.crashing.org on Thu, May 02, 2002 at 03:14:39PM +0200
Those are definitely not SMP chips. The lack of the tlbie broadcast is a
killer. I did some work with a dual 750 and implemented the software
broadcast in software (the code is still in the kernel - but unused) and it
was a nightmare of inefficiency. In most benchmarks it turned out to be a
net negative to use the second processor.
Please... please, make the world a safer place for us on the verge of
insanity OS people and don't do a SMP 750!
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
prev parent reply other threads:[~2002-05-02 16:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-02 4:44 Dual G3's in Umax S900? Robert E Brose II
2002-05-02 8:17 ` Benjamin Herrenschmidt
2002-05-02 13:11 ` Holger Bettag
2002-05-02 13:14 ` Benjamin Herrenschmidt
2002-05-02 15:34 ` Robert E Brose II
2002-05-02 16:14 ` Cort Dougan
2002-05-02 16:46 ` Benjamin Herrenschmidt
2002-05-02 16:12 ` Cort Dougan [this message]
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