Messages in this thread | | | Subject | Re: [PATCH] I3 sched tweaks... | From | Robert Love <> | Date | 16 Jan 2002 16:27:09 -0500 |
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On Wed, 2002-01-16 at 16:19, Justin Carlson wrote:
> Don't forget that, in non-x86 land, current tends to be just kept in a > register. No computations required. Certainly passing it around on, > e.g. mips is a clear loss.
current is stored in a register (esp) in x86, too. This is why I cautioned that looking up current was cheap -- I think every sane arch stores current in some fast access way. That's why it is a macro -- it is assembly code to quickly snag the address.
So is passing current still worth it?
Robert Love
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