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.

I also get the dmessage as "perfmon: perfmon: Errata 121 PMD10/PMD15
cannot be used to overflowwhen threads on on" when that error occurs.

Note that Montecito processor has 12 PMUs.

Here's some infomations about my system may be useful:
------------------------------------------------------
detected host CPUs:  4-way 1600MHz/9.0MB Dual-Core Itanium 2 (Montecito,
rev 7)
detected PMU model: dual-core Itanium 2
max counters/set: 12
supported PMU models: [Itanium] [Itanium2] [dual-core Itanium 2] [generic
IA-64]
supported sampling modules: [inst-hist] [detailed] [compact] [raw]
[dear-hist]
pfmlib version: 3.7
kernel perfmon version: 2.81
kernel clock resolution: 4000000ns (250Hz)
host kernel architecture: ia64



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