On Jan 21 2007 00:14, Ralf Baechle wrote:

On Sat, Jan 20, 2007 at 11:42:37PM +0000, sathesh babu wrote:

quoted

  I am trying to run Linux-2.6.18.2 ( with preemption enable)
  kernel on FPGA board which has MIPS24KE processor runs at 12
  MHZ. Programmed the timer to give interrupt at every 10msec. I
  am seeing some inconsistence behavior during boot up processor.
  Some times it stops after "NET: Registered protocol family 17"
  and "VFS: Mounted root (jffs2 filesystem).". Could some give
  some pointers why the behavior is random. Is it OK to program
  the timer to 10 msec? or should it be more.

The overhead of timer interrupts at this low clockrate is
significant so I recommend to minimize the timer interrupt rate as
far as possible. This is really a tradeoff between latency and
overhead and matters much less on hardcores which run at hundreds of
MHz.

Hm I've been running 2.6.13 on a 10/20 MHz (switchable) i386 @ 100 Hz
before without any hangs during boot or operation.


	-`J'
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