Re: [RFD 5/5] tracing: Add trace_irqsoff tracepoints

[Daniel Wagner]

On 05/04/2015 04:05 PM, Daniel Wagner wrote:
> On 05/01/2015 11:23 AM, Daniel Wagner wrote:
>> On 05/01/2015 02:54 AM, Steven Rostedt wrote:
>>> On Thu, 30 Apr 2015 21:14:52 -0500
>>> Tom Zanussi <tom.zanussi@xxxxxxxxxxxxxxx> wrote:
>>>
>>>
>>>>> 'hist:key=latency.bucket:val=hitcount:sort=latency if cpu==0'
>>>>>
>>>>> but I haven't got this working. I didn't spend much time figuring out
>>>>> why this doesn't work. Even if the above is working you still
>>>>
>>>> I think it doesn't work because the tracepoint doesn't actually have a
>>>> 'cpu' field to use in the filter...
>>>
>>> Perhaps we should add special fields that don't use the tracepoint
>>> field, but can use generically know fields that are always known when
>>> the tracepoint is triggered. COMM could be one, as well as CPU.

Here my second attempt.

Changes v0:
  - Added COMM filter predicate
  - Avoid API break in format by introducing a new list for
    generic fields