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Date:      Fri, 13 Sep 2002 23:19:26 -0700 (PDT)
From:      Julian Elischer <julian@elischer.org>
To:        FreeBSD current users <current@FreeBSD.ORG>
Subject:   A riddle in -current
Message-ID:  <Pine.BSF.4.21.0209132309340.80315-100000@InterJet.elischer.org>

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2 identical machines.
the same kernel binary
/etc (basically) identical (/etc/passwd slightly different)
the same system sources compiled and installed

yet:

one is 10% faster than the other CONSISTANTLY in buildworld

after a reboot and 5 minutes of the EXACT same work (buildworld up to 
the following message:)
--------------------------------------------------------------
>>> stage 2: cleaning up the object tree
--------------------------------------------------------------
the slower machine shows in top:

last pid:  3079;  load averages:  0.01,  0.19,  0.14    up 0+00:13:02
06:13:55
24 processes:  1 running, 14 sleeping, 9 stopped
CPU states:  0.4% user,  0.0% nice,  0.0% system,  0.4% interrupt, 99.2%
idle
Mem: 18M Active, 106M Inact, 27M Wired, 124K Cache, 35M Buf, 94M Free
Swap: 513M Total, 513M Free


while the faster machine shows:
last pid:  3079;  load averages:  0.00,  0.15,  0.13    up 0+00:13:25
06:15:55
24 processes:  1 running, 14 sleeping, 9 stopped
CPU states:  0.0% user,  0.0% nice,  0.4% system,  0.0% interrupt, 99.6%
idle
Mem: 11M Active, 36M Inact, 24M Wired, 144K Cache, 35M Buf, 174M Free
Swap: 513M Total, 513M Free



Notice in particular the differences in Free and Inactive memory...


this is completely reproducible.

anyone have any thoughts?
I can't think of anything that would affect the vm to this extent..

they both start out with 222 MB in the 'free' field.


julian





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