hw.acpi.battery.time reports inconsistent values

From: Ben Kaduk <minimarmot_at_gmail.com>
Date: Fri, 29 Jul 2005 00:25:01 +0000
Hi all -- I don't know whether or not this is related to the recent
battery rework, but I'm running
prolepsis# uname -a
FreeBSD prolepsis.math.uiuc.edu 7.0-CURRENT FreeBSD 7.0-CURRENT #5:
Thu Jul 28 07:42:25 UTC 2005    
kaduk_at_prolepsis.math.uiuc.edu:/usr/obj/usr/src/sys/PROLEPSIS  i386
and this afternoon I had my laptop running off its battery (basically
as a jukebox), which is somewhat unusual since normally I plug it in. 
I wanted to see how
fast I was draining the battery, so I did some `sysctl
hw.acpi.battery'-ing (see transcript below), and then proceeded to get
very confused.

Is there a known race in this sysctl code, or should I be looking for
something else (like a broken acpi)?

prolepsis# sysctl hw.acpi|grep battery
hw.acpi.battery.life: 83
hw.acpi.battery.time: 4399
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 83
hw.acpi.battery.time: 139
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 67
hw.acpi.battery.time: 117
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 64
hw.acpi.battery.time: 92291
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 64
hw.acpi.battery.time: 80
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis#
prolepsis# ps -axl
  UID   PID  PPID CPU PRI NI   VSZ   RSS MWCHAN STAT  TT       TIME COMMAND
    0     0     0   6  12  0     0     0 -      WLs   ??    0:00.00 [swapper]
    0     1     0   4   8  0   752   372 wait   ILs   ??    0:00.01
/sbin/init --
    0     2     0   0  -8  0     0     8 -      DL    ??    0:00.31 [g_event]
    0     3     0   0  -8  0     0     8 -      DL    ??    0:01.46 [g_up]
    0     4     0   0  -8  0     0     8 -      DL    ??    0:02.56 [g_down]
    0     5     0   0   8  0     0     8 -      DL    ??    0:00.00
[thread taskq
    0     6     0   0   8  0     0     8 -      DL    ??    0:00.00 [acpi_task0]
    0     7     0   0   8  0     0     8 -      DL    ??    0:00.00 [acpi_task1]
    0     8     0   0   8  0     0     8 -      DL    ??    0:00.00 [acpi_task2]
    0     9     0   0   8  0     0     8 -      DL    ??    0:00.00
[kqueue taskq
    0    10     0   0 -16  0     0     8 ktrace DL    ??    0:00.00 [ktrace]
    0    11     0  48 171  0     0     8 -      RL    ??   31:42.13 [idle]
    0    12     0   0 -84  0     0     8 -      WL    ??    0:00.00 [irq0: clk]
    0    13     0   0 -60  0     0     8 -      WL    ??    0:00.06
[irq1: atkbd0
    0    14     0   0 -60  0     0     8 -      WL    ??    0:00.00 [irq3: sio0]
    0    15     0   0 -21  0     0     8 -      WL    ??    0:00.00 [irq4:]
    0    16     0   0 -21  0     0     8 -      WL    ??    0:00.00 [irq5:]
    0    17     0   0 -21  0     0     8 -      WL    ??    0:00.00 [irq6:]
    0    18     0   0 -60  0     0     8 -      WL    ??    0:00.00 [irq7: ppc0]
    0    19     0   0 -84  0     0     8 -      WL    ??    0:00.00 [irq8: rtc]
    0    20     0   0 -80  0     0     8 -      WL    ??    0:06.10
[irq9: pcm0 a
    0    21     0   0 -21  0     0     8 -      WL    ??    0:00.00 [irq10:]
    0    22     0   1 -80  0     0     8 -      RL    ??    0:20.07
[irq11: nvidi
    0    23     0   0 -60  0     0     8 -      WL    ??    0:00.08
[irq12: psm0]
    0    24     0   0 -21  0     0     8 -      WL    ??    0:00.00 [irq13:]
    0    25     0   0 -64  0     0     8 -      WL    ??    0:00.67
[irq14: ata0]
    0    26     0   0 -64  0     0     8 -      WL    ??    0:00.00
[irq15: ata1]
    0    27     0   0 -32  0     0     8 -      WL    ??    0:10.54 [swi4: clock
    0    28     0   0 -36  0     0     8 -      WL    ??    0:00.00 [swi3: vm]
    0    29     0   0 -44  0     0     8 -      WL    ??    0:00.00 [swi1: net]
    0    30     0   0 -16  0     0     8 -      DL    ??    0:00.40 [yarrow]
    0    31     0   0 -40  0     0     8 -      WL    ??    0:00.00
[swi2: cambio
    0    32     0   0 -24  0     0     8 -      WL    ??    0:00.00
[swi6: task q
    0    33     0   0 -24  0     0     8 -      WL    ??    0:01.48 [swi6:+]
    0    34     0   0 -28  0     0     8 -      WL    ??    0:00.00 [swi5:+]
    0    35     0   0   8  0     0     8 usbevt DL    ??    0:00.00 [usb0]
    0    36     0   0   8  0     0     8 usbtsk DL    ??    0:00.00 [usbtask]
    0    37     0   0   8  0     0     8 usbevt DL    ??    0:00.00 [usb1]
    0    38     0   0   8  0     0     8 usbevt DL    ??    0:00.00 [usb2]
    0    39     0   0   8  0     0     8 usbevt DL    ??    0:00.00 [usb3]
    0    40     0  16 -16  0     0     8 cbb cv DL    ??    0:00.00 [cbb0]
    0    41     0   0   0  0     0     8 tzpoll DL    ??    0:01.98
[acpi_thermal
    0    42     0   0 -48  0     0     8 -      WL    ??    0:00.00 [swi0: sio]
    0    43     0   0 -16  0     0     8 psleep DL    ??    0:00.01 [pagedaemon]
    0    44     0   6  20  0     0     8 psleep DL    ??    0:00.00 [vmdaemon]
    0    45     0   0 171  0     0     8 pgzero DL    ??    0:00.94 [pagezero]
    0    46     0   0 -16  0     0     8 psleep DL    ??    0:00.03 [bufdaemon]
    0    47     0   0  20  0     0     8 syncer DL    ??    0:00.78 [syncer]
    0    48     0   0  -4  0     0     8 vlruwt DL    ??    0:00.03 [vnlru]
    0    49     0   0  12  0     0     8 -      DL    ??    0:00.30 [schedcpu]
    0   151     1 175  20  0  1216   672 pause  Is    ??    0:00.00 adjkerntz -i
    0   219     1   0  96  0  1336   976 select Ss    ??    0:00.03
/usr/sbin/sys
    0   264     1 158 115  0   508   380 select Is    ??    0:00.00 /sbin/devd
    0   355     1   0  96  0  1252   776 select Ss    ??    0:00.00
/usr/sbin/usb
    0   404     1 118 110  0  3548  2564 select Is    ??    0:00.00
/usr/sbin/ssh
    0   410     1   0  96  0  3576  2784 select Ss    ??    0:00.09
sendmail: acc
   25   414     1   0  20  0  3476  2776 pause  Is    ??    0:00.01
sendmail: Que
    0   429     1   0   8  0  1368  1100 nanslp Ss    ??    0:00.02
/usr/sbin/cro
    0   467     1   0  96  0  1252   728 select Ss    ??    0:00.13
/usr/sbin/mou
 1001   547     1  27  99  0 24408 18864 select Is    ??    0:00.38
kdeinit: kdei
 1001   550     1   0  96  0 23116 17360 select I     ??    0:00.11
kdeinit: kdei
 1001   553   547   0  96  0 24236 18680 select S     ??    0:00.14
kdeinit: kdei
 1001   556     1   1  96  0 27656 23020 select S     ??    0:14.40
kdeinit: kdei
 1001   566   547   0  60  0 12168  9420 select S     ??    0:05.68
/usr/local/bi
 1001   568     1   0  96  0 24896 19948 select S     ??    0:00.19
kdeinit: kdei
 1001   571     1   0  96  0 24996 20064 select S     ??    0:00.23
kdeinit: kdei
 1001   572   547   0  96  0 26372 21880 select S     ??    0:02.16
kdeinit: kdei
 1001   574     1   0  96  0 27760 23788 select S     ??    0:07.09
kdeinit: kdei
 1001   576     1   0  96  0 29304 24924 select S     ??    0:08.41
kdeinit: kdei
 1001   578     1   0  96  0 25204 20700 select S     ??    0:01.33
kdeinit: kdei
    0   579   547   0  96  0  5072  4132 select S     ??    0:00.32
xterm -xtsess
 1001   580   547   1  96  0 27752 23108 select S     ??    0:01.67
kdeinit: kdei
    0   582   547   0  96  0  5396  4516 select S     ??    0:00.29
xterm -xtsess
 1001   583   547   6  20  0 12128  8956 kserel S     ??    3:54.76
xmms --sm-cli
 1001   589   547 153   8  0  1688  1244 wait   I     ??    0:00.02
/bin/sh /usr/
 1001   596     1   0  96  0 32088 25536 select S     ??    0:09.66
kdeinit: kdei
 1001   598   547   0  96  0 24524 19240 select I     ??    0:00.03
kdeinit: kdei
 1001   603   589 153   8  0  1700  1260 wait   I     ??    0:00.01
/bin/sh /usr/
 1001   607   603   0  20  0 37912 31612 kserel S     ??    0:04.91
/usr/X11R6/li
    0   505     1 156   5  0  1312   920 ttyin  Is+   v6    0:00.01
/usr/libexec/
    0   506     1 156   5  0  1312   920 ttyin  Is+   v7    0:00.01
/usr/libexec/
    0   503     1 156   5  0  1312   920 ttyin  Is+   v4    0:00.01
/usr/libexec/
    0   504     1 156   5  0  1312   920 ttyin  Is+   v5    0:00.01
/usr/libexec/
    0   501     1 156   5  0  1312   920 ttyin  Is+   v2    0:00.01
/usr/libexec/
    0   502     1 156   5  0  1312   920 ttyin  Is+   v3    0:00.01
/usr/libexec/
    0   499     1 156   5  0  1312   916 ttyin  Is+   v0    0:00.01
/usr/libexec/
    0   500     1  11   8  0  1676  1380 wait   Is    v1    0:00.05
login [pam] (
 1001   507   500  12   8  0  2248  1852 wait   I     v1    0:00.03 -bash (bash)
 1001   509   507 141   8  0  1680  1200 wait   I+    v1    0:00.01
/bin/sh /usr/
 1001   521   509  19   8  0  2004  1292 wait   I+    v1    0:00.01
xinit /home/k
    0   522   521   1  96  0 88772 86660 select S     v1    0:42.02 X
:0 -noliste
 1001   525   521  22   8  0  1680  1228 wait   I     v1    0:00.03
/bin/sh /usr/
 1001   569   525   0   8  0  1316   860 nanslp S     v1    0:00.09
kwrapper ksms
 1001   587   580   0   8  0  2256  1924 wait   Is    p3    0:00.03
/usr/local/bi
    0   615   587   0   8  0  1692  1340 wait   I     p3    0:00.02 su
    0   616   615   0  20  0  2896  2196 pause  S     p3    0:00.07 _su (csh)
    0   697   616   1  96  0  1464   932 -      R+    p3    0:00.00 ps -axl
 1001   584   582   0   8  0  2264  1928 wait   Is    p2    0:00.04 bash
 1001   696   584   0  96  0  9332  5976 select S+    p2    0:00.14
vim batter.sy
 1001   581   579   0   5  0  2268  1932 ttyin  Is+   p1    0:00.05 bash


rolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 61
hw.acpi.battery.time: 73
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 58
hw.acpi.battery.time: 35450
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 58
hw.acpi.battery.time: 73
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5
prolepsis# sysctl hw.acpi.battery
hw.acpi.battery.life: 58
hw.acpi.battery.time: 4099
hw.acpi.battery.state: 1
hw.acpi.battery.units: 2
hw.acpi.battery.info_expire: 5

I really wish my battery would keep that much energy stored, but I
don't really think
it's going to happen anytime soon!

Thanks

Ben Kaduk
Received on Thu Jul 28 2005 - 22:25:02 UTC

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