Date: Mon, 1 Mar 2004 15:54:35 +0100 (CET) From: Christoph Herrmann <C.Herrmann@science-computing.de> To: current@freebsd.org Subject: ULE behaviour on SMP systems Message-ID: <Pine.BSF.4.58.0403011528480.4796@blnsrv1.science-computing.de>
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Hi,
I'm running 5.2 current from saturday (2004/02/28, oslevel 502104)
on a dual Athlon system.
When I compiled java (whith make HOTSPOT_BUILD_JOBS=2 ...)
I found that only one CPU was used for both compile processes.
So I testet how much time only the build oj java needs.
With SCHED_ULE top -I typically looks like that:
last pid: 13422; load averages: 0.00, 0.07, 0.07 up 1+14:05:27 11:08:25
82 processes: 3 running, 79 sleeping
CPU states: 47.7% user, 0.0% nice, 2.3% system, 0.0% interrupt, 50.0% idle
Mem: 178M Active, 101M Inact, 91M Wired, 29M Cache, 60M Buf, 95M Free
Swap: 512M Total, 180K Used, 512M Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
13416 root 138 0 25980K 25148K CPU1 1 0:03 22.66% 22.66% cc1plus
13421 root 137 0 22540K 21736K RUN 1 0:03 21.09% 21.09% cc1plus
13392 root 76 0 1920K 1572K CPU0 0 0:00 0.00% 0.00% top
The build needs about 2:30h. time says the follwing:
9158.566u 806.682s 2:30:43.11 110.1% -227+1704k 33789+8607io 10950pf+0w
Then I rebuild the kernel with SCHED_4BSD and did the same again.
Now both CPUs where in use (top -I):
last pid: 3745; load averages: 1.94, 1.92, 1.42 up 0+00:26:38 13:46:39
55 processes: 3 running, 52 sleeping
CPU states: 95.3% user, 0.0% nice, 4.7% system, 0.0% interrupt, 0.0% idle
Mem: 98M Active, 203M Inact, 74M Wired, 14M Cache, 60M Buf, 106M Free
Swap: 512M Total, 512M Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
3738 root 129 0 36160K 35680K CPU1 1 0:06 98.62% 25.59% cc1plus
3744 root 129 0 20968K 20572K RUN 0 0:03 72.13% 10.06% cc1plus
3739 root -8 0 1312K 1140K piperd 1 0:00 0.19% 0.05% as
3740 hey 96 0 1896K 1436K CPU0 0 0:00 0.00% 0.00% top
The build needs only 1:43h.
and time says:
9205.844u 892.192s 1:43:09.48 163.1% -171+1756k 29763+8491io 10757pf+0w
I think, this is not the way it should run.
Jeff, maybe you can have a look at this?
Best regards
Christoph &:-)
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