Date: Sun, 1 Feb 2004 18:01:43 -0800 (PST) From: Don Lewis <truckman@FreeBSD.org> To: current@FreeBSD.org Subject: nice not nice enough with ULE Message-ID: <200402020201.i1221h7E098722@gw.catspoiler.org>
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I'm seeing the following during the java library building phase of the lang/gcc33 port: last pid: 41215; load averages: 3.82, 3.60, 3.53 up 0+05:39:11 17:53:43 67 processes: 4 running, 63 sleeping CPU states: 1.5% user, 78.2% nice, 20.3% system, 0.0% interrupt, 0.0% idle Mem: 72M Active, 624M Inact, 125M Wired, 37M Cache, 111M Buf, 139M Free Swap: 2055M Total, 2055M Free PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND 531 setiathome 139 15 16692K 15888K RUN 195:45 75.00% 75.00% setiathome 18973 dl 76 0 2200K 1328K RUN 0:41 0.00% 0.00% top 508 uucp 5 0 1264K 924K ttyin 0:35 0.00% 0.00% newapc 582 dl 76 0 6004K 2296K select 0:10 0.00% 0.00% sshd 92710 root 8 0 11616K 10596K wait 0:08 0.00% 0.00% gmake 19272 root 8 0 12456K 11980K wait 0:07 0.00% 0.00% ruby 98135 root 8 0 9676K 8568K wait 0:06 0.00% 0.00% gmake 19274 root -8 0 1124K 520K piperd 0:05 0.00% 0.00% tee 510 uucp 76 0 1240K 888K select 0:04 0.00% 0.00% upsd 18955 dl 76 0 6004K 2320K RUN 0:03 0.00% 0.00% sshd 514 uucp 8 0 1244K 920K nanslp 0:02 0.00% 0.00% upsmon 7129 root 76 0 1204K 784K select 0:02 0.00% 0.00% script 430 root 76 0 1516K 1020K select 0:02 0.00% 0.00% ntpd 16600 dl 4 0 1152K 664K kqread 0:01 0.00% 0.00% tail 461 root 76 0 3252K 2056K select 0:01 0.00% 0.00% sendmail 35166 dl 8 0 1188K 868K nanslp 0:01 0.00% 0.00% vmstat The port build is running at nice 0, but setiathome at nice 15 is getting 75% of the CPU. Something unusual about this phase of the port build is that it is using libtool, which must spawn a lot of processes, because "last pid" in increasing by about 30 to 40 per second. The port build should be pretty close to CPU bound because I see very litle disk I/O. When larger files are compiled so that individual processes hang around for a longer period of time, I see setiathome drop down to about 11% of the CPU. The machine in question is has a single Athlon XP processor and is running rev 1.98 of sched_ule.c.
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