14 Jul
2008
14 Jul
'08
2:06 p.m.
On Sunday 13 July 2008 23:58:19 Emanuel Rumpf wrote:
things to do additionally
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enable realtime clock
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for the realtime clock to work, you've got to load these modules:
modprobe rtc_core
modprobe rtc_cmos
you should then have a device
/dev/rtc0
I have /dev/rtc from previous
then change the max-user-frequency of rtc (default is only 64):
echo 2048 > /sys/class/rtc/rtc0/max_user_freq
I have this set to 1024 (kernel hz?) in /etc/sysctl.conf.
test:
cat /sys/class/rtc/rtc0/max_user_freq
and maybe of hpet as well (?)
echo 2048 > /proc/sys/dev/hpet/max-user-freq
(Is hpet emulated by rtc ?)
There are hpet source files in the kernel sources and
among them an
hpet/emulate.rtc.h. No particular hpet.ko was built, however.
There is a /usr/src/linux-2.6.25.8/Documentation/hpet.txt which says that this
is a REPLACEMENT for the rtc stuff and the first two of its 32 timers will
stand in for the rtc. So it would seem one or the other.
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set realtime priorities
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install scheduling tools (/usr/bin/chrt)
apt-get install schedutils
This one threatened to remove some stuff
or
apt-get install schedtool
This one was clean.
install,setup and run the rtirq script by Rui Nuno Capela
download:
wget http://www.rncbc.org/jack/rtirq-20071012.tar.gz
Got it, copied the files to
places and my startup stuff to run it.
So will give everything a try out. The kernel runs fine. Debian's nvidia built
and works OK. One caveat is that hal kicks out all the dma and 32-bit disk
accesses but they can be immediately set back so I put that in my startup
stuff as well.