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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: Thu, 28 May 2020 14:08:38 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95348

--- Comment #6 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to qinzhao from comment #5)
> (In reply to Martin Li=C5=A1ka from comment #4)>=20
> > Can you please share some statistics how big are the files and how many=
 runs do you merge?
>=20
>   There were on the order of 10,000 processes. Source code coverage=20
>   approximately 20%. Size of the profiling data gathered in the vicinity =
of
> 1TB.

Which means one run takes 100MB is size, right? As you mentioned, having 10=
00
.gcda files, it means that one takes 0.1MB?

>=20
> > Would it be possible to share 'gcov-dump -l' for all your .gcda files?
>=20
> It is impossible since too many .gdca files, each process has one directo=
ry,
> there are over 10,000 directories and under each directory, there are over
> thousand .gdca files.=20
>=20
> the situation is similar as the small testing case I added in the first
> comment. the functions and modules that do not execute have records in the
> .gdca file with zero counts.

Can you please provide dump of one directory? At least for portion of .gcda
files?
How is it common that an entire module is empty?=