Steven Rostedt wrote:
On Thu, 17 Apr 2008, john stultz wrote:
Anyway, I wanted to hit the list with this so folks could look at it and
let me know if such severe jitter was expected from just compile
options?
I think this may simply be a simple case of cache misses.
Attached is two files: sched_jitter-test.c and do_work.S. I found that by
switching the positions of do_work1 and do_work2, which ever one is first
performs better. do_work1 is me copying the output of objdump of -O1 of
do_work, and do_work2 is copying the output from objdump of -O2.
So jitter going down might simply be a case of the
faster cases actually slowing down, right - and
making things uniformly slow?
Do we know if the whole kaboodle is getting faster?
thanks,
Nivedita
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