Marcelo Tosatti wrote: > On Thu, May 07, 2009 at 01:03:45PM -0400, Gregory Haskins wrote: > >> Chris Wright wrote: >> >>> * Gregory Haskins (ghaskins@xxxxxxxxxx) wrote: >>> >>> >>>> Chris Wright wrote: >>>> >>>> >>>>> VF drivers can also have this issue (and typically use mmio). >>>>> I at least have a better idea what your proposal is, thanks for >>>>> explanation. Are you able to demonstrate concrete benefit with it yet >>>>> (improved latency numbers for example)? >>>>> >>>>> >>>> I had a test-harness/numbers for this kind of thing, but its a bit >>>> crufty since its from ~1.5 years ago. I will dig it up, update it, and >>>> generate/post new numbers. >>>> >>>> >>> That would be useful, because I keep coming back to pio and shared >>> page(s) when think of why not to do this. Seems I'm not alone in that. >>> >>> thanks, >>> -chris >>> >>> >> I completed the resurrection of the test and wrote up a little wiki on >> the subject, which you can find here: >> >> http://developer.novell.com/wiki/index.php/WhyHypercalls >> >> Hopefully this answers Chris' "show me the numbers" and Anthony's "Why >> reinvent the wheel?" questions. >> >> I will include this information when I publish the updated v2 series >> with the s/hypercall/dynhc changes. >> >> Let me know if you have any questions. >> > > Greg, > > I think comparison is not entirely fair. <snip> FYI: I've update the test/wiki to (hopefully) address your concerns. http://developer.novell.com/wiki/index.php/WhyHypercalls Regards, -Greg
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