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  • Re: git: af60084978a4 - main - Add description for WITH_PTHREADS_ASSERTIONS [turning off debug for personal builds of main ( and stable/* )]

    From Mark Millard@marklmi@yahoo.com to muc.lists.freebsd.stable on Fri Sep 5 17:59:50 2025
    From Newsgroup: muc.lists.freebsd.stable

    Nuno Teixeira <eduardo_at_freebsd.org> wrote on
    Date: Fri, 05 Sep 2025 22:27:07 UTC :
    Thanks for the hint, I missed 642cd511028b .

    Think I'm good now:

    /etc/src.conf
    WITH_MALLOC_PRODUCTION=yes
    WITHOUT_LLVM_ASSERTIONS=yes
    WITHOUT_PTHREADS_ASSERTIONS=yes
    Another potential one is:
    QUOTE
    Is there a reason that ASSERT_DEBUG
    ( in share/mk/bsd.opts.mk ) is left enabled
    ( listed in __DEFAULT_YES_OPTIONS )?
    QUOTE
    You might want: WITHOUT_ASSERT_DEBUG=
    See: https://lists.freebsd.org/archives/freebsd-stable/2025-September/003110.html for Colin's comment about why it is unchanged
    in official stable/* and releng/*.* builds
    (instead staying like in main) and my reply.
    What you want to do for ASSERT_DEBUG might depend on
    your security context's requirements if you are
    willing to use a setting that FreeBSD official builds
    never use.
    Side note:
    I'll note that the usage of all 4 of these ignore the
    "yes" text detail and are tested only for being defined
    vs. not. "no" would get the same result.
    Cheers!


    Colin Percival <cperciva@freebsd.org> escreveu (sexta, 5/09/2025 |a(s) 23:07):

    On 9/5/25 14:57, Nuno Teixeira wrote:
    For people that turn off debug on main, should WITH_PTHREADS_ASSERTIONS
    be
    turned off?

    e.g.
    /etc/src.conf:
    WITH_MALLOC_PRODUCTION=yes
    WITHOUT_LLVM_ASSERTIONS=yes

    According to commit 642cd511028b running WITHOUT_PTHREADS_ASSERTIONS improves
    mutex performance by 5-18%. So yes if you want maximal performance on HEAD you should probably turn this off.

    Colin Percival
    ===
    Mark Millard
    marklmi at yahoo.com
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