[lkml]   [2001]   [Sep]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.4.10pre10aa1 (first spin to the vm rewrite included)
In article <20010917180914.I713@athlon.random> wrote:
> Some of the the main features of 2.4.10pre10aa1 are:

> o rcu core included (thought it will be rewritten, I agreed with
> Dipankar that the per-cpu scheduling sequence number seems
> the best approch, such number can serve also as a statistic
> to usespace infact, it is very similar to Rusty's patch but it
> doesn't add any branch to the schedule fast path, he's rewriting
> the patch at the moment and I'll include it in the next release)

Sorry, in the latest patch I folded the per-cpu context switch counter into
per-cpu counters for other quiescent states - user mode code and idle loop
in order to save on an extra compare making a single counter :-)
So, it is not much of a user space statistics anymore.

I can put that counter back, but I think eventually it may anyway
make sense to start using per-cpu statistics counters. As a matter
of fact we are working on a framework to support these. If we do
use per-cpu statistics counters later, RCU can make use of the
per-cpu context switch statistics counter.

Dipankar Sarma <> Project:
Linux Technology Center, IBM Software Lab, Bangalore, India.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:03    [W:0.044 / U:0.844 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site