[Patch] Pass counter values to -prof perf

[Eric Caspole]

Hi Nitsan,
My patch here is to put the same functionality with "-prof perf" which 
shows the "perf stat" data; as you say, custom events already works with 
"-prof perfasm"
Regards,
Eric


On 08/23/2018 03:45 AM, Nitsan Wakart wrote:
> Hi Eric,
> AFAICT, the perfasm profiler has supported events for a while now.
> "-prof perfasm:h" prints out the help:
>      events=<event>                   Events to gather. (default: 
> [cycles, instructions])
> 
> Use for instance with some random events "-prof 
> perfasm:events=cycles,LLC-load-misses,cache-misses"
> ...
> Perf output processed (skipped 8.662 seconds):
>   Column 1: cycles (49249 events)
>   Column 2: LLC-load-misses (1222 events)
>   Column 3: cache-misses (4831 events)
> 
> ...
> 
> So not so sure what is added here.
> Thanks,
> Nitsan
> 
> 
> On Wednesday, August 22, 2018, 10:50:44 PM GMT+2, Eric Caspole 
> <eric.caspole at oracle.com> wrote:
> 
> 
> Hi everybody,
> 
> I have a use case with JMH on new hardware where I need to pass the
> counters I want to see to -prof perf, I would like to contribute a patch
> for this below:
> 
> http://cr.openjdk.java.net/~ecaspole/jmh_stat_counters/webrev/ 
> <http://cr.openjdk.java.net/%7Eecaspole/jmh_stat_counters/webrev/>
> 
> It works like -prof perfasm extended syntax like
> 
>   -prof 'perf:events=cycles,instructions,r99'
> 
> Works for me so far in my own case here.
> 
> Thanks,
> 
> Eric
>