Re: 8-CPU (SMP) #s for lockfree rtcache

Robert Love
2002-05-28T15:50:10Z

On Tue, 2002-05-28 at 05:58, Dipankar Sarma wrote:

> > Thanks, I am convinced RCU is the way to go.

I am not. :P

> Well, the last time RCU was discussed, Linus said that he would
> like to see someplace where RCU clearly helps.

I agree the numbers posted are nice, but I remain skeptical like Linus.
Sure, the locking overhead is nearly gone in the profiled function where
RCU is used. But the overhead has just been _moved_ to wherever the RCU
work is now done. Any benchmark needs to include the damage done there,
too.

I also balk at implicit locking...

Robert Love