Re: [V3 01/10] perf: New conditional branch filter criteria in branchstack sampling

[Anshuman Khandual]

On 11/26/2013 03:45 PM, Anshuman Khandual wrote:
> On 11/26/2013 11:36 AM, mpe@xxxxxxxxxxxxxx wrote:
>> Ideally your commit subject would contain a verb, preferably in the present
>> tense.
>>
>> I think simply "perf: Add PERF_SAMPLE_BRANCH_COND" would be clearer.
> 
> 
> Sure, will change it.
> 
>>
>> On Wed, 2013-16-10 at 06:56:48 UTC, Anshuman Khandual wrote:
>>> POWER8 PMU based BHRB supports filtering for conditional branches.
>>> This patch introduces new branch filter PERF_SAMPLE_BRANCH_COND which
>>> will extend the existing perf ABI. Other architectures can provide
>>> this functionality with either HW filtering support (if present) or
>>> with SW filtering of instructions.
>>>
>>> Signed-off-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
>>> Reviewed-by: Stephane Eranian <eranian@xxxxxxxxxx>
>>> ---
>>>  include/uapi/linux/perf_event.h | 3 ++-
>>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
>>> index 0b1df41..5da52b6 100644
>>> --- a/include/uapi/linux/perf_event.h
>>> +++ b/include/uapi/linux/perf_event.h
>>> @@ -160,8 +160,9 @@ enum perf_branch_sample_type {
>>>  	PERF_SAMPLE_BRANCH_ABORT_TX	= 1U << 7, /* transaction aborts */
>>>  	PERF_SAMPLE_BRANCH_IN_TX	= 1U << 8, /* in transaction */
>>>  	PERF_SAMPLE_BRANCH_NO_TX	= 1U << 9, /* not in transaction */
>>> +	PERF_SAMPLE_BRANCH_COND		= 1U << 10, /* conditional branches */
>>>  
>>> -	PERF_SAMPLE_BRANCH_MAX		= 1U << 10, /* non-ABI */
>>> +	PERF_SAMPLE_BRANCH_MAX		= 1U << 11, /* non-ABI */
>>>  };
>>
>> This no longer applies against Linus' tree, you'll need to rebase it.
> 
> Okay

Hey Michael,

Looks like the patch still applies on top of Linus's tree. The modified patch with
a new commit subject line can be found here.

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