by Ben » Sat, 29 Jan 2000 04:00:00
---Ben
by fv » Sat, 29 Jan 2000 04:00:00
--
Frank v Waveren
ICQ# 10074100
by r.. » Sun, 30 Jan 2000 04:00:00
Why do you want to do this? If you have some background
processing it to do, it might be better to do it in
a daemon in userspace.
Rich.
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--- Original message content Copyright ? 1999 Richard Jones ---
by Peter Samuels » Sun, 30 Jan 2000 04:00:00
That is what kernel threads are for. So that you can play with theQuote:> It is a driver .. good luck with trying to re-nice a kernel driver.
Peter
by Juergen Hein » Mon, 31 Jan 2000 04:00:00
>Leave the scheduling to the system. Just go to nice +19, that way you'll only
>get cpu time when the cpu is idle (well, not completely true, but the little
>non-idle cpu time you get is negligable).
You might start here ...
/usr/src/linux/init/main.c
... as there is an idle thread and take a look into the scheduler
code too. AFAIK though there cannot even be a API function as the
kernel is using the HALT instruction so your best bet might be
a 08/15 driver.
I am not going to ask why you want to do that, hope this is okay ;)
Juergen
--
\ Real name : Jrgen Heinzl \ no flames /
by fv » Mon, 31 Jan 2000 04:00:00
--
Frank v Waveren
ICQ# 10074100
1. kapm-idled shows 90+% cpu usage when idle
Do you have CONFIG_APM_CPU_IDLE=y in your .config? If so, disable it.
There was a thread about this problem some months ago. I found
that on all of my APM-capable machines, including a Dell laptop,
CONFIG_APM_CPU_IDLE=y had a negative effect. The kernel ended up
in a tight loop performing tons of APM IDLE BIOS calls, since each
BIOS call returned immediately without having idled the CPU.
Leaving CONFIG_APM_CPU_IDLE unset lets the kernel use its own
"HLT when idle" code. On my main development box, idle CPU
temperature dropped >10 degrees C, and kapm-idled now uses 0% CPU.
/Mikael
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