On Thu, Apr 2, 2009 at 3:29 PM,  <x...@ict.ac.cn> wrote:
> Hi all:
>
> Now I'm using a dual-core Itanium2 processor with perfmon kernel 2.81,
> pfmlib and pfmon V3.7.
> I have used pfmon3.2 with kernel 2.0 for long time. I updated the perfmon
> kernel to 2.81 recently and now I get problems. When I count for more than
> 6 events with pfmon, I get the error message "cannot write PMCs: Invalid
> argument". If the number of events is less than or equal to 6, pfmon works
> well.

You need to provide the exact pfmon cmdline so I can try and reproduce the
problem.

>
> I also get the dmessage as "perfmon: perfmon: Errata 121 PMD10/PMD15
> cannot be used to overflowwhen threads on on" when that error occurs.
>
That is normal. There is indeed a processor bug.


> Note that Montecito processor has 12 PMUs.
>
Yes, but there are restrictions on some events.

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