Re: Staircase test patch

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Con Kolivas wrote:
On Saturday 01 April 2006 10:22, Peter Williams wrote:
Con Kolivas wrote:
On Saturday 01 April 2006 07:31, Thorsten Will wrote:
On Friday 31 March 2006 23:07 +1000, Con Kolivas wrote:
Hi Thorsten et al
Hi, Con.

Thorsten could you please test to see if this fixes the problem for
you?
Oh boy, oh boy, oh boy.

Against a bash loop:
|# dd bs=1M count=2048 </dev/hdb >/dev/null
|2048+0 records in
|2048+0 records out
|2147483648 bytes transferred in 35.497603 seconds (60496582 bytes/sec)

Yes! Success! And the crowd goes wild! :-)

I think you finally nailed it. Thank you so much!
No, thank _you_ for bringing it to my attention and testing :)
Should I apply this to staircase in PlugSched?
I plan to make staircase v15 which is just this change, which would then need
to be resunc with plugsched. Unfortunately this needs code in
account_system_time which is not open to the schedulers in plugsched
currently so it needs more plugsched code to go in. I suspect other
schedulers may want to hook into this function, but I know you're currently
busy with smp nice to hack this in. I may look at doing it myself when I have
time if you don't have time.
OK. I'm currently porting PlugSched to 2.6.16-mm2 which requires adding
priority inheritance to each scheduler. I'm modifying staircase and
nicksched myself but would appreciate a code review after I release it.
Peter
--
Peter Williams                                   [email protected]

"Learning, n. The kind of ignorance distinguishing the studious."
 -- Ambrose Bierce
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