Re: [perfmon2] Implementing Intel's drill-down technique for performance analysis

[stephane e. <er...@go...>]

Hi,

What machine are you trying to do this on?

On Thu, Nov 25, 2010 at 4:39 PM, Eduard Diner
<edu...@go...> wrote:
> Hi guys,
> I have instrumented my code on Nehalem with libpfm4 and now I am a little
> bit confused.
> I am reading Intel's "IA64-Optimization-Reference". In Appendix B3.4 they
> describe a drill-down technique for performance analysis. I think this is a
> good starting point for analysis.
> Basically I want to map Intel's description in the document to the events of
> libpfm4. This sounds easy... but it is not that easy for me :-)
>
>
> Intel writes for example:
> "Cycles_non_retiring_uops .... A constant issue rate of μops flowing through
> the issue port. Thus, we define:
> uops_rate = Dispatch_uops/Cycles_issuing_uops, where Dispatch_uops can be
> measured with RS_UOPS_DISPATCHED, clearing the INV bit and the CMASK."
>
> Well, I don't see a RS_UOPS_DISPATCHED event in libpfm. As far as I
> understood the architecture, UOPS_DISPATCHED can be expressed as the sum of
> UOPS_RETIRED and UOPS_ISSUED.
> What do you think?
>
> Regards, Eduard
>
> ------------------------------------------------------------------------------
> Increase Visibility of Your 3D Game App & Earn a Chance To Win $500!
> Tap into the largest installed PC base & get more eyes on your game by
> optimizing for Intel(R) Graphics Technology. Get started today with the
> Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs.
> http://p.sf.net/sfu/intelisp-dev2dev
> _______________________________________________
> perfmon2-devel mailing list
> per...@li...
> https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
>
>