Re: [PATCH] proc: Avoid a thundering herd of threads freeing proc dentries

[Junxiao Bi]

On 6/22/20 8:20 AM, ebiederm@xxxxxxxxxxxx wrote:

> If I understand correctly, the Java VM is not exiting.  Just some of
> it's threads.
>
> That is a very different problem to deal with.  That are many
> optimizations that are possible when_all_  of the threads are exiting
> that are not possible when_many_  threads are exiting.
>
> Do you know if it is simply the cpu time or if it is the lock contention
> that is the problem?  If it is simply the cpu time we should consider if
> some of the locks that can be highly contended should become mutexes.
> Or perhaps something like Matthew's cpu pinning idea.

The problem is high %sys time.

Thanks,

Junxiao.