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Date:      Sun, 31 Oct 1999 11:44:20 +0100
From:      Iceman <iceman@nrg4u.com>
To:        Leif Neland <leif@neland.dk>
Cc:        Alan Cox <alc@cs.rice.edu>, current@FreeBSD.ORG
Subject:   Re: Sv: copy-on-write optimized faults
Message-ID:  <381C1D84.C0125AD7@nrg4u.com>
References:  <19991029144743.Z16685@cs.rice.edu> <01d501bf22f7$75a55820$0e00a8c0@neland.dk>

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Leif Neland wrote:
> 
> > I would appreciate it if people running -current would run a "vmstat -s"
> > and tell me if they see a NON-ZERO value for copy-on-write optimized
> > faults.  About six months ago, I implemented a simpler and more general
> > optimization at an earlier "fork in the road".  (In effect, I avoid
> > the creation of the redundant vm object that "copy-on-write
> > optimized faults" applies to.)
> >
> FreeBSD ns.internet.dk 3.3-STABLE FreeBSD 3.3-STABLE #6: Fri Oct  1 16:06:46 CEST 1999     root@neland.dk:/usr/src/sys/compile/DK  i386
> 
>   9272885 copy-on-write faults
>   2062637 copy-on-write optimized faults <<????????????
> 
> I must have something configured wrong, or???

I get high numbers too:

FreeBSD mailtoaster1.pipeline.ch 3.2-STABLE FreeBSD 3.2-STABLE #3: Sun
Jun 13 20:31:43 CEST 1999     opi@mailtoaster1.pipeline.ch:/usr/src/sys
/compile/mailtoaster1  i386

11:40AM  up 137 days, 23:26, 1 user, load averages: 0.00, 0.00, 0.00

 64598649 cpu context switches
2745071057 device interrupts
 32328669 software interrupts
 43110463 traps
296791454 system calls
        0 swap pager pageins
        0 swap pager pages paged in
        0 swap pager pageouts
        0 swap pager pages paged out
    22418 vnode pager pageins
    46048 vnode pager pages paged in
        0 vnode pager pageouts
        0 vnode pager pages paged out
      122 page daemon wakeups
   188111 pages examined by the page daemon
     2100 pages reactivated
 10358286 copy-on-write faults
   693663 copy-on-write optimized faults
 20699423 zero fill pages zeroed
 15663587 zero fill pages prezeroed
      252 intransit blocking page faults
 41725673 total VM faults taken
 43325585 pages freed
      112 pages freed by daemon
 25621561 pages freed by exiting processes
    17199 pages active
    35325 pages inactive
     1922 pages in VM cache
     8481 pages wired down
     1067 pages free
     4096 bytes per page
 85804588 total name lookups
          cache hits (67% pos + 5% neg) system 7% per-directory
          deletions 1%, falsehits 0%, toolong 0%

FreeBSD proxy.pipeline.ch 3.3-STABLE FreeBSD 3.3-STABLE #3: Fri Oct  8
11:08:16 CEST 1999     opi@proxy.pipeline.ch:/usr/src/sys/compile/
proxy  i386

11:38AM  up 22 days, 14:59, 2 users, load averages: 0.00, 0.00, 0.00

 16661677 cpu context switches
467666693 device interrupts
 12164983 software interrupts
 11257840 traps
120776685 system calls
     6941 swap pager pageins
     7483 swap pager pages paged in
      725 swap pager pageouts
     2821 swap pager pages paged out
     4196 vnode pager pageins
    12204 vnode pager pages paged in
        0 vnode pager pageouts
        0 vnode pager pages paged out
     1885 page daemon wakeups
  4572222 pages examined by the page daemon
     4850 pages reactivated
   449499 copy-on-write faults
    30784 copy-on-write optimized faults
   555925 zero fill pages zeroed
   312825 zero fill pages prezeroed
      576 intransit blocking page faults
  1619807 total VM faults taken
  1826533 pages freed
     1817 pages freed by daemon
   703761 pages freed by exiting processes
    22101 pages active
     2977 pages inactive
     1520 pages in VM cache
     4868 pages wired down
      224 pages free
     4096 bytes per page
 18695799 total name lookups
          cache hits (51% pos + 4% neg) system 31% per-directory
          deletions 0%, falsehits 0%, toolong 0%

-- 
Andre


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