Date: Thu, 11 Dec 2003 09:10:43 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Jeff Roberson <jroberson@chesapeake.net> Cc: current@freebsd.org Subject: Re: ULE and current. Message-ID: <20031211085336.O13173@hewey.af.speednet.com.au> In-Reply-To: <20031208132102.R88168@hewey.af.speednet.com.au> References: <20031207082612.D4201-100000@mail.chesapeake.net> <20031208132102.R88168@hewey.af.speednet.com.au>
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The scheduling of nice processes seems to be broken:
team2# nice -7 sh -c "while :; do echo -n;done" &
team2# nice -7 sh -c "while :; do echo -n;done" &
team2# sleep 120; top -S
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
675 root 133 -7 1576K 952K CPU1 1 1:52 75.78% 75.78% sh
676 root 133 -7 1576K 952K RUN 1 1:39 73.44% 73.44% sh
12 root -16 0 0K 12K RUN 0 18:46 55.47% 55.47% idle: cpu0
11 root -16 0 0K 12K RUN 1 7:00 0.00% 0.00% idle: cpu1
Adding a third nice process eliminates the idle time, but cpu% is still bad:
team2# nice -7 sh -c "while :; do echo -n;done" &
team2# sleep 120; top -S
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU CPU COMMAND
705 root 133 -7 1576K 952K CPU0 0 1:53 100.78% 100.78% sh
675 root 133 -7 1576K 952K RUN 1 12:12 51.56% 51.56% sh
676 root 133 -7 1576K 952K RUN 1 11:30 49.22% 49.22% sh
729 root 76 0 2148K 1184K CPU1 1 0:00 0.78% 0.78% top
12 root -16 0 0K 12K RUN 0 24:00 0.00% 0.00% idle: cpu0
11 root -16 0 0K 12K RUN 1 7:00 0.00% 0.00% idle: cpu1
The box is a dual P133 running -current from 8th Dec.
--
:{ andyf@speednet.com.au
Andy Farkas
System Administrator
Speednet Communications
http://www.speednet.com.au/
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