On Jul 8, 2008, at 3:01 PM, Nathan Lynch wrote:
Background from Maynard Johnson:
As of POWER6, a set of 32 common events is defined that must be
supported on all future POWER processors. The main impetus for this
compat set is the need to support partition migration, especially from
processor P(n) to processor P(n+1), where performance software that's
running in the new partition may not be knowledgeable about processor
P(n+1). If a performance tool determines it does not support the
physical processor, but is told (via the
PPC_FEATURE_PSERIES_PMU_COMPAT
bit) that the processor supports the notion of the PMU compat set,
then the performance tool can surface just those events to the user
of the tool.
PPC_FEATURE_PSERIES_PMU_COMPAT indicates that the PMU supports at
least this basic subset of events which is compatible across POWER
processor lines.
Signed-off-by: Nathan Lynch <[EMAIL PROTECTED]>
---
So is PMU here performance monitor unit? I think that was part of my
confusion earlier. I was thinking Power Mgmt Unit (like on Apple HW).
I hate make the name longer, but PPC_FEATURE_PSERIES_PERFMON_COMPAT
would probably be clearer.
- k
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
