From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 1B950383E826; Wed,  3 Jun 2020 15:17:46 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1B950383E826
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1591197466;
 bh=OR9/fIHKvCwuSdsh12h4icby1VwqzxYwTINi9A5mO4k=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=DIrlManzP+V9+2rlPQjHCEjcH7GqmfTLBibXKtRa6UUhFOirJTog8UixnFCfQUlnx
 xEn1gkBk5OBXkVk95neJueXpEuIgPzBgUBhXmFXsVYMq1LaQXgQJT+sa+Y4fcjMTb1
 kWnI8RUW1Hh93s+uju9TS+HU6jD5oWf6OvnDY3VU=
From: "qing.zhao at oracle dot com" <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, 03 Jun 2020 15:17:45 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: gcov-profile
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: qing.zhao at oracle dot com
X-Bugzilla-Status: WAITING
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: marxin at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-95348-4-d5jHl1wNiq@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-95348-4@http.gcc.gnu.org/bugzilla/>
References: <bug-95348-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 03 Jun 2020 15:17:46 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95348

--- Comment #26 from Qing Zhao <qing.zhao at oracle dot com> ---
> --- Comment #25 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
>> I will try to get more data on our real application.=20
>>=20
>> one question: why not just delete the entire records whose counter is ze=
ro
>> and delete the entire file whose counter is zero?
>=20
> Because we need to distinguish in between situations where a function was
> really not executed (counter =3D=3D 0) and the situation where we miss pr=
ofile for
> a function.
Understood.  However, is it possible to just provide an option for the user=
 to
choose
to just delete all the zero records and files in order to save more space?
>=20
> How exactly do you merge profiles? Do you run parallel invocation which c=
an
> take log2(N)?
We run serial merge adding one at a time right now.=20
Is it possible for gcov-merge to add a new functionality to automatically m=
erge
complete
Set of subdirectories?=