Re: [Jikesrvm-researchers] followup question on building JikesRVM on Linux/PowerPC

[Robin G. <Rob...@an...>]

Carmen,

Attached is a patch that adds performance counter support with the 
perfctr library to JikesRVM on several processors including the PowerPC 
970.  You would need to update it for the PPC 750.

The perfctr libraries are available at

http://user.it.uu.se/~mikpe/linux/perfctr/

The main thing you need is the register settings to specify particular 
counters, and these can be found in either the processor documentation 
(most definitive but often difficult to interpret), or other 
libraries/packages such as oprofile, papi etc (which should probably not 
be trusted 100%).

I hope to get this committed to CVS as soon as I get time to clean it up 
sufficiently for general release.

cheers,

Robin

Eliot Moss wrote:

>Carmen -- I think some folks did get the perfctrs working on PPC/Linux, but
>I'm not sure. I would expect that the usual cycle counter would be the same
>as PM_CYCLES, modulo possible slight differences in how/when the counter is
>read -- but these should be slight. But someone else may be able to give an
>authoritative answer on this point.
>
>-- Eliot
>
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