On Jan 21 2007 00:14, Ralf Baechle wrote: >On Sat, Jan 20, 2007 at 11:42:37PM +0000, sathesh babu wrote: > >> 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' --
