Subject: Re: [PATCH 1/2] power7, perf: Make some new raw event codes available in sysfs

From: Anshuman Khandual <[email-masked]>
Date: Thu, 02 Jan 2014 10:35:03 +0530

On 12/18/2013 07:29 AM, Michael Ellerman wrote:
> On Fri, 2013-12-13 at 10:00 +0530, Anshuman Khandual wrote:
>> On 12/13/2013 08:20 AM, Michael Ellerman wrote:
>>> On Wed, 2013-10-16 at 11:22 +0530, Anshuman Khandual wrote:
>>>> This patch adds some more raw event codes into the existing list
>>>> of event codes present in power7-events-list.h file. This tries
>>>> to complete the list of events supported in Power7 and matches
>>>> the raw event list with libpfm4 library.
>>>
>>> It's a bit annoying, but you also need to update the "ABI" document:
>>
>> What is annoying ? you need to be specific.
> 
> It's annoying that we have to update the ABI document.
> 
>>>   Documentation/ABI/testing/sysfs-bus-event_source-devices-events
>>>
>>
>> The events listed under the following heading are events required to do
>> CPI analysis.
> 
> No they are not, it doesn't say that anywhere in the file.
> 
> It happens that the events in there *now* are the CPI events, but that's because
> they are the only ones that have been added.
> 
>> "Description:    POWER-systems specific performance monitoring event"
>>
>> 		  /sys/devices/cpu/events/PM_1PLUS_PPC_CMPL
>>                 /sys/devices/cpu/events/PM_BRU_FIN
>>                 /sys/devices/cpu/events/PM_BR_MPRED
>>                 /sys/devices/cpu/events/PM_CMPLU_STALL
> 
> All events that appear in /sys/devices/cpu/events on powerpc should be listed
> in the file.

Done, sent out the V2 version of the patch for POWER7 adding all the sysfs exported
raw events into the ABI documentation file.