[Skiboot] [RFC PATCH 0/4] OPAL support for POWER8 Nest instrumentation

Madhavan Srinivasan maddy at linux.vnet.ibm.com
Thu Apr 23 13:21:10 AEST 2015

On Wednesday 22 April 2015 07:19 AM, Stewart Smith wrote:
> Madhavan Srinivasan <maddy at linux.vnet.ibm.com> writes:
>> Currently we do not have the Nest instrumentation detection
>> mechanism ready. This should happen via LID file. Currently
>> the LID file is under developement and does not contain
>> the Chip level events or the layout for the chip level events.
> What's the logic behind going to have a separate LID? Why doesn't this
> info fit into anywhere else?
Nest PMU counters can be programmed/accessed via two ways,
in-band scom or using PORE_SLW_IMA engine. PORE_SLW_IMA engine
(runs of occ complex) does program the nest PMUs with set of
predefined chip level events, periodically collects the counter data
and moves to HOMER.

Now these predefined event are sent as a catalog lid (metadata file) to
system to understand the supported events by PORE_SLW_IMA engine.
The catalog also contains CORE_IMA (24x7 feature) events.


More information about the Skiboot mailing list