From: Dan Malek <dan@netx4.com>
To: Alan Mimms <alan@packetengines.com>
Cc: "Mark S. Mathews" <mark@absoval.com>,
linuxppc-embedded@lists.linuxppc.org
Subject: Re: RPXLite 823 PCMCIA troubles
Date: Wed, 01 Dec 1999 12:21:37 -0500 [thread overview]
Message-ID: <38455921.52C11DB2@netx4.com> (raw)
In-Reply-To: 3844A2E1.64157F00@packetengines.com
Alan Mimms wrote:
> This issue probably is nearly moot on the nearly non-superscalar (dumb as a rock)
> 8xx processors, but is MUCH more important (i.e., VITAL) on the 82xx processors
> with the 603ish core and on all "real" PowerPC processors.
In defense of the 8xx, it isn't as dumb as some people believe.
It is a PPC core that performs a number of performance enhancements,
including branch folding and speculative loads. Not to the extent
of a superscalar (and the 603 isn't a shining star compared to
other PPCs, either), but they still happen and you have to be
careful of them just like any other PPC.
Designing a system using a "it doesn't happen as often" requirement
is a very poor engineering practice.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~1999-12-01 17:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-11-30 19:43 RPXLite 823 PCMCIA troubles Mark S. Mathews
1999-12-01 2:51 ` Dan Malek
1999-12-01 3:41 ` Mark S. Mathews
1999-12-01 4:08 ` Dan Malek
1999-12-02 20:49 ` Mark S. Mathews
1999-12-02 21:10 ` Dan Malek
1999-12-01 4:24 ` Alan Mimms
1999-12-01 17:21 ` Dan Malek [this message]
1999-12-01 17:46 ` Alan Mimms
-- strict thread matches above, loose matches on Subject: below --
1999-12-03 4:31 Brian Kuschak
1999-12-03 6:32 ` Mark S. Mathews
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