Re: MPS: profiler

[Gerd Möllmann]

Helmut Eller <eller.helmut@gmail.com> writes:

> On Fri, Jun 21 2024, Ihor Radchenko wrote:
>
>> May you infer from the backtrace whether MPS "freezes" everything at the
>> time when segfault triggers? If it does, such freezes should probably be
>> recorded by the profiler and accumulated in "GC" entry in the profiler
>> report, as we do it on master. Otherwise, profiler will be missing some
>> data.
>
> There is a function mps_arena_busy, that might be useful.  The doc says
> that it should only be used for debugging.  But the implementation
> actually checks if the arena holds a lock.

Yes, the SIBPROF handler could at least return early then.