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Groups > linux.debian.kernel > #72861

Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd

From "Steinar H. Gunderson" <sesse@debian.org>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd
Date 2021-09-09 15:00 +0200
Message-ID <CVrON-7CM-1@gated-at.bofh.it> (permalink)
References (5 earlier) <AEWA1-7bf-3@gated-at.bofh.it> <AEWA1-7bf-3@gated-at.bofh.it> <CVq6m-6Lc-7@gated-at.bofh.it> <wMHjz-3U2-3@gated-at.bofh.it> <CVq6m-6Lc-7@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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On Thu, Sep 09, 2021 at 12:54:50PM +0200, Tony Garnock-Jones wrote:
> Thanks, Steinar, for your suggestion! I've written a patch against the
> non-libbfd code in perf to try it out.
> 
> It works very well. What used to take endless minutes now takes a few
> seconds.

Thanks for doing this! I can confirm; I tested this on “perf report” against
a perf.data with DWARF tracebacks, with perf 5.13.4 (the same file every
time), and here are the results:

  non-bfd, without patch:  7m59s
  non-bfd, with patch:       15s
  bfd:                       15s 

/* Steinar */
-- 
Homepage: https://www.sesse.net/

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Thread

Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd Tony Garnock-Jones <tonyg@leastfixedpoint.com> - 2021-09-09 13:10 +0200
  Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd "Steinar H. Gunderson" <sesse@debian.org> - 2021-09-09 15:00 +0200
  Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd Tony Garnock-Jones <tonyg@leastfixedpoint.com> - 2021-09-10 12:40 +0200
    Bug#911815: /usr/bin/perf_4.18: Please build perf against libbfd Salvatore Bonaccorso <carnil@debian.org> - 2021-11-11 22:40 +0100

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