lkml.org 
[lkml]   [2006]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [discuss] Re: 2.6.19-rc5: known regressions (v3)
Date

> What other purposes do you see the performance counters useful for?

Export one to user space as a cycle counter for benchmarking. RDTSC doesn't
do this job anymore.

> To collect information on process characteristics so they can be scheduled more efficiently?

That might happen at some point in the future, but i would expect
us to wait for CPUs with more performance counters first.

> Is this going to require sharing the nmi interrupt and knowing which perfcounter
> register triggered the interrupt to get the correct action? Currently the
> oprofile interrupt handler assumes any performance monitoring counter it sees
> overflowing is something it should count.

Yes. That needs to be fixed.

-Andi

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-16 16:51    [W:0.070 / U:51.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site