Re: Make yield_task_fair more efficient

[Ingo Molnar]

* Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx> wrote:

> I have an alternate approach in mind (that I need to find time for), 
> threaded-rbtrees. Walking the tree is really efficient, specially 
> finding successor of a node.

sure, feel free to experiment with those details.

But if you want to improve Java workloads then you should probably start 
by converting them to futexes instead of sched_yield(), that will 
probably give far more performance than micro-optimizing the 
sys_sched_yield() codepath. (especially when it happens at the expense 
of other workloads, which is not acceptable for mainline) You can 
rebuild your JVM easily and re-test with its locking fixed, right?

	Ingo
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