slow in user space?

Hi all,
I have a MPC8241 board and running ppc kernel 2.4.21-pre7 on it.
Serial console is enabled and a small ramdisk is mounted as root. The board is running at 200M Hz. The kernel seems to be ok during bootup (just a few seconds). But after the root filesystem is mounted and /sbin/init is started, the system becomes very slow. I need to wait several minutes for the login console.
My board has no rtc. So I assume that tb_ticks_per_jiffy is equal
to be 25M/HZ (25M is the memory clock frequency). tb_ticks_per_jiffy will set the decrementer register which will control how long the timer interrupt occurs. is it correct to set this value?
I have ever tried some smaller values for it and I found that the
speed becomes faster. But the time on the board becomes faster also (uptime on the board is several hours but I power on it just several minutes).
Does anyone have suggestions on it?

Thanks.

Best Regards
John

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Your DUART interrupts aren't routed/initialized correctly. The serial driver has timeouts that slowly poll the driver if interrupts aren't showing up.

	-- Dan

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Hi

nor settled properly. After mounting the ramdisk console driver (serial port in ur case)starts working in interrupt mode. If serial port interrupt are not set properly, It will work on timer based & system will be slow.

It may help......................

Bhupi
www.gdatech.com
Linux+Hypertransport -> Silicon
www.gdatech.com
Good after beer -- Linux

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