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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/95348] GCC records zero functions and modules in
 the profiling data file, ICC does NOT
Date: Wed, 27 May 2020 14:22:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95348

--- Comment #4 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to qinzhao from comment #3)
> (In reply to Martin Li=C5=A1ka from comment #2)
> > Thank you for the report. It's a known limitation Honza noticed me abou=
t.
> > Is the size problematic from size perspective or speed perspective?
>=20
> I think both size and speed.

That would be very similar to what Honza sees for Firefox.

>=20
> for the full execution of our application, the GCC's profiling data is too
> big to out of the disk space.=20=20
> at the same time, since we have to merge all the profiling data for
> different processes, the merging process take a long time due to so many
> profiling data files.=20

Can you please share some statistics how big are the files and how many run=
s do
you merge?

Would it be possible to share 'gcov-dump -l' for all your .gcda files?
You can strip the leading filename to make the data completely anonymous.

>=20
> > Have you tried compressing the gcda files?
> >=20
> > Anyway, I'm going to work on that this stage1.
>=20
> thanks a lot. this is a high priority task for us.

Sounds like good motivation for me to implement it.=