Re: [HEADSUP] Please help test device vnode bypass!

From: Conrad J. Sabatier (conrads_at_cox.net)
Date: 11/11/04

  • Next message: Mark Santcroos: "Re: natd broken for days" 
    Date: Thu, 11 Nov 2004 10:34:05 -0600
To: Sebastian Schulze Struchtrup <seb@struchtrup.com>

    On Wed, 10 Nov 2004 17:54:07 +0100, Sebastian Schulze Struchtrup
    <seb@struchtrup.com> wrote:

    > Poul-Henning Kamp wrote:
    >
    > >Please test this feature.
    > >
    > >Even better, help test the perforce branch phk_bufwork if you can.
    > >
    > >Poul-Henning
    > >
    > >In message <200411081046.iA8AklqT003808@repoman.freebsd.org>,
    > >Poul-Henning Kamp
    > > writes:
    > >
    > >
    > >>phk 2004-11-08 10:46:47 UTC
    > >>
    > >> FreeBSD src repository
    > >>
    > >> Modified files:
    > >> sys/fs/devfs devfs_vnops.c
    > >> Log:
    > >> Add optional device vnode bypass to DEVFS.
    > >>
    > >>
    > >>
    >
    > fops=0
    > 1000000 bytes transferred in 4.865386 secs (205534 bytes/sec)
    >
    > fops=1
    > 1000000 bytes transferred in 2.513814 secs (397802 bytes/sec)
    >
    > This would result in approx. 2us per syscall.
    >
    > System is FreeBSD 6.0-CURRENT #25: Tue Nov 9 13:44:16 CET 2004
    > (something like an Athlon XP 2k) with invariants and witness, without
    > anything out of phk_bufwork.
    >
    > No problems until now.

    No problems here, either (except that natd now mysteriously panics on
    boot; probably unrelated?).

    I've noticed a *very* substantial speedup in fscking my ~170 gig /usr
    partition. Very nice! 

    -- 
Conrad J. Sabatier <conrads@cox.net> -- "In Unix veritas"
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