Re: [PATCH] RCU for low latency (experimental)

Takashi Iwai
2004-03-29T10:43:50Z

At Sun, 28 Mar 2004 19:28:41 +0200,
I wrote:
>
> > > anyway, i confirmed that with the original krcud patch the latency
> > > with dcache flood can be eliminated.
> >
> > Does the throttle-rcu patch also help eliminate dcache flood ? You
> > can try by just changing count >= rcumaxbatch to ++count > rcumaxbatch.
>
> i'll try it later.

the throttle-rcu patch does work indeed well even without preemption.
i've tested maxbatch=16 and plugticks=0. in the older version, there
was 20ms long latency, while in the patched version, no measurable
latency more than 1ms.

thanks for your work!

Takashi