[PATCH] for SCHED_ULE & libpthread issue (was Re: I like SCHED_4BSD)

[Peter Schultz]

Taku YAMAMOTO wrote:
> Unfortunately, due to over-optimization in sched_switch(), SCHED_ULE doesn't
> give reasonable CPU time to the threads which are using scheduler activation.
> 
> Detailed analisis is described in my previous message posted to current@:
> 	"SCHED_ULE sometimes puts P_SA processes into ksq_next unnecessarily"
> 	<20040213063139.71298ea9.taku at cent.saitama-u.ac.jp>
>  or
> 	http://docs.freebsd.org/cgi/mid.cgi?20040213063139.71298ea9.taku
> , which didn't get broader audience :(
> 
> Until the problem is fully addressed, I will propose following patch
> to be applied. (the least intrusive one attached in the former message)
> 

This patch improves interactivity under heavy load very much.

Thanks,
Pete...