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From: Jan Hubicka <hubicka@ucw.cz> To: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> Cc: gcc-bugs@gcc.gnu.org Subject: Re: [Bug gcov-profile/99105] profile streaming scales poorly to projects with many source files Date: Mon, 15 Feb 2021 16:21:14 +0100 [thread overview] Message-ID: <20210215152114.GH44975@kam.mff.cuni.cz> (raw) In-Reply-To: <bug-99105-4-vNRCjU2v31@http.gcc.gnu.org/bugzilla/> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99105 > > --- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> --- > This is what I see for GCC PGO in train stage. It's from perf top: > > 4.33% cc1plus [.] __gcov_indirect_call_profiler_v4 > ◆ > 2.28% cc1plus [.] __gcov_topn_values_profiler > ▒ > 0.85% cc1plus [.] ggc_internal_alloc Yep, this is usual profile I see. Perhaps you want to try profile "make check" > > In the case of GCC, we emit 500 .gcda files. > > @Honza: Can you please test my patch that uses glibc buffered I/O if it helps? I can give it a try later this week (I would like to collect some data on performance first) Honza
next prev parent reply other threads:[~2021-02-15 15:21 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-15 13:46 [Bug gcov-profile/99105] New: " hubicka at gcc dot gnu.org 2021-02-15 13:56 ` [Bug gcov-profile/99105] " hubicka at gcc dot gnu.org 2021-02-15 13:58 ` marxin at gcc dot gnu.org 2021-02-15 14:19 ` Jan Hubicka 2021-02-15 13:59 ` marxin at gcc dot gnu.org 2021-02-15 14:19 ` hubicka at ucw dot cz 2021-02-15 14:38 ` marxin at gcc dot gnu.org 2021-02-15 14:50 ` hubicka at ucw dot cz 2021-02-15 14:56 ` marxin at gcc dot gnu.org 2021-02-15 15:17 ` hubicka at ucw dot cz 2021-02-15 15:18 ` marxin at gcc dot gnu.org 2021-02-15 15:21 ` Jan Hubicka [this message] 2021-02-15 15:21 ` hubicka at ucw dot cz 2021-02-15 15:21 ` marxin at gcc dot gnu.org 2021-02-15 15:23 ` marxin at gcc dot gnu.org 2021-02-15 15:32 ` Jan Hubicka 2021-02-15 15:32 ` hubicka at ucw dot cz 2021-02-15 16:12 ` hubicka at ucw dot cz 2021-02-15 20:20 ` [Bug gcov-profile/99105] [11 regression] " hubicka at gcc dot gnu.org 2021-02-15 20:40 ` hubicka at gcc dot gnu.org 2021-02-16 10:31 ` marxin at gcc dot gnu.org 2021-02-16 13:57 ` marxin at gcc dot gnu.org 2021-03-04 15:22 ` cvs-commit at gcc dot gnu.org 2021-03-04 15:23 ` marxin at gcc dot gnu.org
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