Re: Gather performance analysis

Hi,

On 2021-09-08 11:45:16 +0530, Dilip Kumar wrote:
> On Wed, Sep 8, 2021 at 3:08 AM Andres Freund <andres@anarazel.de> wrote:
> 
> 
> > Looking at this profile made me wonder if this was a build without
> > optimizations. The pg_atomic_read_u64()/pg_atomic_read_u64_impl() calls
> > should
> > be inlined. And while perf can reconstruct inlined functions when using
> > --call-graph=dwarf, they show up like "pg_atomic_read_u64 (inlined)" for
> > me.
> >
> 
> Yeah, for profiling generally I build without optimizations so that I can
> see all the functions in the stack, so yeah profile results are without
> optimizations build but the performance results are with optimizations
> build.

I'm afraid that makes the profiles just about meaningless :(.


> Is this with or without patch, I mean can we see a comparison that patch
> improved anything in your environment?

It was without any patches. I'll try the patch in a bit.

Greetings,

Andres Freund