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Re: gcc 3.1 is still very slow, compared to 2.95.3
On Sat, May 18, 2002 at 02:05:24PM +0100, Richard Earnshaw wrote:
> Do we have machines where we can profile things like cache and TLB
> activity in user code?
Pentium Pro and later have a pretty useful set of performance
monitoring registers, but using them requires OS support. (To
use them effectively, you really need to set them up to interrupt
on overflow, and use that interrupt instead of a jittery clock to
gather profile statistics.)
-- Jason R. Thorpe <email@example.com>