reading battery status and CPU time

[Jan Rychter <jan-JAsPCFd0eodBDgjK7y7TUQ@public.gmane.org>]

FYI: reading battery status still consumes lots of CPU time. Unless it's
supposed to be that way?

time cat /proc/acpi/battery/BAT0/state produces:

0.000u 0.040s 0:00.12 33.3%     0+0k 0+0io 108pf+0w
0.000u 0.040s 0:00.13 30.7%     0+0k 0+0io 108pf+0w
0.000u 0.030s 0:00.12 25.0%     0+0k 0+0io 108pf+0w
0.000u 0.030s 0:00.14 21.4%     0+0k 0+0io 108pf+0w
0.000u 0.050s 0:00.14 35.7%     0+0k 0+0io 108pf+0w
0.000u 0.030s 0:00.14 21.4%     0+0k 0+0io 108pf+0w

... which causes applications like wmacpi to consume tens of seconds of
CPU time after a while. Not really a price I'd be willing to pay for
knowing the battery status.

This is on 2.4.21-pre6 with acpi-20030328. Sharp Mebius PC-MT1-H3.

--J.


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