RE: optimize __gp location

From: Chen, Kenneth W <kenneth.w.chen_at_intel.com>
Date: 2005-01-26 06:44:34
>>>>> On Mon, 24 Jan 2005 08:51:17 +0100, Christian Hildner said:
  Christian> Did you have benchmarks? Or at least a comparison of the
  Christian> resulting code size. The code size should shrink when
  Christian> more items can be addressed directly. Furthermore the
  Christian> code size should be a good indicator for the performance
  Christian> gain you could achive.

David Mosberger wrote on Monday, January 24, 2005 9:53 AM
> I'm curious about this too.  Ken, do you have a real-world benchmark
> where improved GP-relative addressability actually made a significant
> difference?

I don't have any benchmark result off hand.  But digging through recent
data, for a well known db benchmark, GOT table access account to about
4% of total memory latency in the kernel.

- Ken


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Received on Tue Jan 25 14:49:43 2005

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