ok, part of the mystery is solved and i'm just being an idiot:
On Wed, 7 Jul 2010, Robert P. J. Day wrote:
> and this is also weird:
>
> (gdb) p loops_per_jiffy
> $16 = 4096
>
> huh? that value is way too low for this system. on my old 32-bit
> system, that value would be around 2 million or so.
in fact, that's exactly the right value based on this snippet from
init/main.c:
unsigned long loops_per_jiffy = (1<<12);
which is, of course, 4096.
but i still don't know why i can't print the changing value of
jiffies if i clear the cache with:
(gdb) core-file /proc/kcore
rday
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