Re: low(er) disk performance with sched_4bsd then with sched_ule

From: Joseph Koshy (joseph.koshy_at_gmail.com)
Date: 09/18/05

  • Next message: Scott Long: "Re: low(er) disk performance with sched_4bsd then with sched_ule" 
    Date: Sun, 18 Sep 2005 07:35:18 +0530
To: Andrew Gallatin <gallatin@cs.duke.edu>

    > I don't know the disk codepath very well, but the samples look
    > little suspect.

    They do look odd. For one, there are entries for the p4_*_pmc
    functions which would never get called on a P-III box.

    Oliver, after you sync'ed up with RELENG_6, did you keep the
    sources for pmcstat(8) sync'ed with current? If not, that
    would explain the skewed profile. Yesterday I MFC'ed a
    few bug fixes so could you run the last step (pmcstat -g -R
    /path-to-sample-file) with today's pmcstat(8)? The file
    "src/usr.sbin/pmcstat_log.c" should be at rev 1.3.2.1. 

    -- 
FreeBSD Volunteer,     http://people.freebsd.org/~jkoshy
_______________________________________________
freebsd-current@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
  • Next message: Scott Long: "Re: low(er) disk performance with sched_4bsd then with sched_ule"

    Relevant Pages