Unusually high LA without any load at FreeBSD9-BETA2

From: Alex Kozlov <spam_at_rm-rf.kiev.ua>
Date: Tue, 6 Sep 2011 19:30:36 +0300
Hi, current

I see an unusually high LA for more than 10 hours without slightest load.
Any ideas?


FreeBSD 9-BETA2 r225400 amd64

$sysctl
cpu     HAMMER
kern.ccpu: 0
kern.sched.cpusetsize: 8
  <cpu count="2" mask="3">0, 1</cpu>
    <cpu count="2" mask="3">0, 1</cpu>
kern.smp.cpus: 2
kern.smp.maxcpus: 64
dev.cpu.0.freq: 300
dev.cpu.0.freq_levels: 2200/35000 1925/30625 1650/26250 1600/23000 1400/20125 1200/15000 1050/13125 900/11250 750/9375 600/7500 450/5625 300/3750 150/1875
dev.cpu.0.cx_supported: C1/1 C2/1 C3/17
dev.cpu.0.cx_lowest: C2
dev.cpu.0.cx_usage: 0.00% 100.00% 0.00% last 240us
dev.cpu.1.cx_supported: C1/1 C2/1 C3/17
dev.cpu.1.cx_lowest: C2
dev.cpu.1.cx_usage: 0.00% 100.00% 0.00% last 857us

$vmstat -i
interrupt                          total       rate
irq1: atkbd0                         160          0
irq9: acpi0                        44432          0
irq12: psm0                            9          0
irq17: ath0 uhci3                  45696          0
irq20: hpet0 uhci0*              4920185         92
irq23: uhci2 ehci1                  9276          0
irq256: hdac0                          8          0
irq257: ahci0                      26674          0
Total                            5046440         94

$top				# last pid changes very slowly
last pid:  4814;  load averages:  0.75,  0.72,  0.73                        up 0+14:48:02  19:10:51
36 processes:  2 running, 33 sleeping, 1 waiting
CPU:  0.2% user,  0.0% nice,  0.0% system,  0.0% interrupt, 99.8% idle
Mem: 23M Active, 376M Inact, 246M Wired, 120K Cache, 309M Buf, 2256M Free
Swap:

  PID USERNAME  THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
   11 root        2 155 ki31     0K    32K CPU1    1  29.4H 200.00% idle
 4808 kozlov      1  20    0 16616K  2164K CPU0    0   0:01  0.20% top
   12 root       16 -84    -     0K   256K WAIT    1   3:33  0.00% intr
 1316 root        1  20    0 12096K  1308K select  0   0:26  0.00% powerd
   16 root        1 -16    -     0K    16K tzpoll  1   0:20  0.00% acpi_thermal
   14 root        1 -16    -     0K    16K -       0   0:12  0.00% yarrow
   15 root       32 -68    -     0K   512K -       0   0:09  0.00% usb
   13 root        3  -8    -     0K    48K -       1   0:06  0.00% geom
 1453 kozlov      1  20    0 47996K  4644K select  0   0:05  0.00% sshd
    0 root       10 -52    0     0K   160K -       1   0:04  0.00% kernel
    8 root        1  16    -     0K    16K syncer  0   0:03  0.00% syncer
 1363 root        1  21    0 14176K  1644K nanslp  1   0:03  0.00% cron
 1440 root        1  20    0   412M   347M select  0   0:02  0.00% Xorg
    9 root        1 -16    -     0K    16K sdflus  1   0:01  0.00% softdepflush
 1454 kozlov      1  20    0 16456K  3024K wait    1   0:01  0.00% bash
    7 root        1 -16    -     0K    16K vlruwt  0   0:01  0.00% vnlru
    6 root        1 -16    -     0K    16K psleep  1   0:01  0.00% bufdaemon
 1091 root        1  20    0 12228K  1484K select  0   0:01  0.00% syslogd
 1694 root        1  -8    -     0K    16K mdwait  0   0:01  0.00% md4
  121 root        1  -8    -     0K    16K mdwait  0   0:00  0.00% md1
    3 root        1 -16    -     0K    16K psleep  0   0:00  0.00% pagedaemon
 1451 root        1  44    0 47996K  4304K sbwait  0   0:00  0.00% sshd
 1445 root        1  26    0 71764K  6224K select  0   0:00  0.00% xdm
 1350 root        1  21    0 28916K  3508K select  1   0:00  0.00% sshd
 1438 root        1  26    0 41068K  2916K pause   0   0:00  0.00% xdm
  945 root        1  20    0 10372K  3412K select  0   0:00  0.00% devd
 1142 root        1  -8    -     0K    16K mdwait  1   0:00  0.00% md2
 1280 root        1  -8    -     0K    16K mdwait  0   0:00  0.00% md3
    5 root        1 155 ki31     0K    16K pgzero  0   0:00  0.00% pagezero
    1 root        1  20    0  6276K   600K wait    0   0:00  0.00% init
 1437 root        1  52    0 12100K  1352K ttyin   1   0:00  0.00% getty
 1436 root        1  52    0 12100K  1352K ttyin   0   0:00  0.00% getty
  109 root        1  -8    -     0K    16K mdwait  0   0:00  0.00% md0
    2 root        1 -16    -     0K    16K ccb_sc  1   0:00  0.00% xpt_thrd
    4 root        1 -16    -     0K    16K psleep  1   0:00  0.00% vmdaemon
   10 root        1 -16    -     0K    16K audit_  0   0:00  0.00% audit
Received on Tue Sep 06 2011 - 14:55:03 UTC

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