Messages in this thread |  | | | Date | Tue, 15 Mar 2005 09:49:30 -0800 | | From | Brad Boyer <> | | Subject | Re: [PATCH] PPC64 iSeries: cleanup viopath |
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On Tue, Mar 15, 2005 at 11:43:10AM -0600, Linas Vepstas wrote: > FWIW, keep in mind that a cache miss due to large structures not fitting > is a zillion times more expensive than byte-aligning in the cpu > (even if byte operands had a cpu perf overhead, which I don't think > they do on ppc).
Actually, there is a small overhead to bytes if you make them signed. That's why char is unsigned by default on ppc.
Brad Boyer flar@allandria.com
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