JMH and ocperf

[Sergey Melnikov]

Hi,

As I wrote, the main issue here is an event naming style. Few details:

ocperf.py takes events with dots ('.') in titles but outputs events with underscores ('_') instead of dots.
So, you need to replace dots ('.') with underscores ('_') and you will get results for specified events:

-prof perfasm:event=cycles,br_inst_exec_all_branches


The reason for this a bit behaviour is backward compatibility with old versions of perf.

--Sergey

On Mon, Dec 05, 2016 at 08:55:47PM +0100, Aleksey Shipilev wrote:
> On 11/22/2016 05:15 PM, Aleksey Shipilev wrote:
> >  6) Submit for further review.
> 
> In private communication, Sergey indicated that ocperf works even with the
> initial patch, I pushed it under:
>  https://bugs.openjdk.java.net/browse/CODETOOLS-7901842
> 
> However, the symbolic mapping looks not entirely complete. perfasm tries to
> match the symbolic names given in "events" string to what perf report answers.
> But are we having that mapping in perf report? Because it shows zero events with
> e.g.:
> 
> -prof perfasm:event=cycles,br_inst_exec.all_branches
> 
> ...
> 
> Secondary result "·asm":
> PrintAssembly processed: 126267 total address lines.
> Perf output processed (skipped 5.187 seconds):
>  Column 1: cycles (8794 events)
>  Column 2: br_inst_exec.all_branches (0 events)
> 
> Sergey, can you please follow up on this?
> 
> Thanks,
> -Aleksey
>