Re: timer counter chip access mystery]

From: Petri Helenius (pete_at_he.iki.fi)
Date: 07/17/03

  • Next message: James West: "Re: Major problem with "No buffer space available" errors" 
    To: "Steven Hartland" <killing@barrysworld.com>, "Jin Guojun [DSD]" <j_guojun@lbl.gov>, <freebsd-performance@freebsd.org>
Date: Thu, 17 Jul 2003 01:01:49 +0300

    5.x defaults to ACPI or TSC timers. So your wish has been transported
    by a timemachine into the past.

    With 4.x you have to set it manually.

    Pete

    ----- Original Message -----
    From: "Steven Hartland" <killing@barrysworld.com>
    To: "Petri Helenius" <pete@he.iki.fi>; "Jin Guojun [DSD]" <j_guojun@lbl.gov>; <freebsd-performance@freebsd.org>
    Sent: Thursday, July 17, 2003 12:57 AM
    Subject: Re: timer counter chip access mystery]

    > If this could be changed / fixed it would have a marked performance increase
    > for all game server code which use this function heavily from what I've seen
    > and would explain the sometimes huge performance differential between
    > FreeBSD and Linux.
    >
    > Steve / K
    > ----- Original Message -----
    > From: "Petri Helenius" <pete@he.iki.fi>
    > To: "Jin Guojun [DSD]" <j_guojun@lbl.gov>; <freebsd-performance@freebsd.org>
    > Sent: Wednesday, July 16, 2003 10:44 PM
    > Subject: Re: timer counter chip access mystery]
    >
    >
    > >
    > > This access happens over ISA bus and thus happens at the speed the bus
    > > operates at. Use TSC or ACPI for faster gettimeofday.
    > >
    > > Pete
    >
    >
    _______________________________________________
    freebsd-performance@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-performance
    To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"

  • Next message: James West: "Re: Major problem with "No buffer space available" errors"