From: Nick Desaulniers <ndesaulniers@google.com> To: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masahiro Yamada <masahiroy@kernel.org>, Nathan Chancellor <nathan@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, clang-built-linux <clang-built-linux@googlegroups.com> Subject: Re: Very slow clang kernel config .. Date: Thu, 29 Apr 2021 19:22:27 -0700 [thread overview] Message-ID: <CAKwvOdk+V2dc31guafFM=N2ez4SrwCmah+mimUG3MzPMx_2efQ@mail.gmail.com> (raw) In-Reply-To: <CAKwvOdmMF_v9TzBtFn2S1qSS_yCDO8D-u3WhBehUM7gzjcdjUQ@mail.gmail.com> On Thu, Apr 29, 2021 at 5:19 PM Nick Desaulniers <ndesaulniers@google.com> wrote: > > On Thu, Apr 29, 2021 at 2:53 PM Linus Torvalds > <torvalds@linux-foundation.org> wrote: > > > > I haven't looked into why this is so slow with clang, but it really is > > painfully slow: > > > > time make CC=clang allmodconfig > > real 0m2.667s > > > > vs the gcc case: > > > > time make CC=gcc allmodconfig > > real 0m0.903s > > Can > you provide info about your clang build such as the version string, > and whether this was built locally perhaps? d'oh it was below. > > This is on my F34 machine: > > > > clang version 12.0.0 (Fedora 12.0.0-0.3.rc1.fc34) -- Thanks, ~Nick Desaulniers
next prev parent reply other threads:[~2021-04-30 2:22 UTC|newest] Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-29 21:53 Linus Torvalds 2021-04-30 0:19 ` Nick Desaulniers 2021-04-30 2:22 ` Nick Desaulniers [this message] 2021-05-01 0:19 ` Nick Desaulniers 2021-05-01 0:23 ` Nick Desaulniers 2021-05-01 0:25 ` Nick Desaulniers 2021-05-01 0:40 ` Nick Desaulniers 2021-05-01 1:22 ` Linus Torvalds 2021-05-01 1:48 ` Nick Desaulniers 2021-05-01 2:16 ` Fangrui Song 2021-05-01 3:32 ` Tom Stellard 2021-05-01 16:32 ` Linus Torvalds 2021-05-01 19:57 ` Serge Guelton 2021-05-01 22:39 ` Linus Torvalds 2021-05-01 23:55 ` Fangrui Song 2021-05-01 21:58 ` David Laight 2021-05-02 9:31 ` Adrian Bunk 2021-05-02 11:35 ` David Laight 2021-05-02 16:12 ` Linus Torvalds 2021-05-02 16:45 ` Adrian Bunk 2021-05-02 16:49 ` Linus Torvalds 2021-05-02 17:55 ` Adrian Bunk 2021-05-02 17:59 ` Linus Torvalds 2021-05-02 21:48 ` Adrian Bunk 2021-05-04 22:02 ` Miguel Ojeda 2021-05-05 0:58 ` Theodore Ts'o 2021-05-05 17:21 ` Miguel Ojeda 2021-05-04 21:32 ` Miguel Ojeda 2021-05-05 11:05 ` David Laight 2021-05-05 13:53 ` Miguel Ojeda 2021-05-05 14:13 ` David Laight 2021-05-05 16:06 ` Miguel Ojeda 2021-05-05 16:25 ` David Laight 2021-05-05 17:55 ` Miguel Ojeda 2021-05-03 1:03 ` Maciej W. Rozycki 2021-05-03 14:38 ` Theodore Ts'o 2021-05-03 14:54 ` Theodore Ts'o 2021-05-03 17:14 ` Maciej W. Rozycki 2021-05-03 16:09 ` David Laight 2021-05-04 23:04 ` Greg Stark 2021-05-05 0:55 ` Theodore Ts'o 2021-05-01 23:37 ` Mike Hommey 2021-05-02 5:19 ` Dan Aloni 2021-05-03 16:48 ` Tom Stellard 2021-05-03 19:00 ` Fangrui Song 2021-04-30 0:52 ` Nathan Chancellor 2021-04-30 2:21 ` Nick Desaulniers
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