lkml.org 
[lkml]   [2007]   [Mar]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [patch] sched: accurate user accounting
Date
On Sunday 25 March 2007 17:51, Ingo Molnar wrote:
> * Con Kolivas <kernel@kolivas.org> wrote:
> > For an rsdl 0.33 patched kernel. Comments? Overhead worth it?
>
> we want to do this - and we should do this to the vanilla scheduler
> first and check the results. I've back-merged the patch to before RSDL
> and have tested it - find the patch below. Vale, could you try this
> patch against a 2.6.21-rc4-ish kernel and re-test your testcase?

Great. That should fix a lot of misconceptions about cpu usage and HZ.

However-

> +/*
> + * Some helpers for converting nanosecond timing to jiffy resolution
> + */
> +#define NS_TO_JIFFIES(TIME) ((TIME) / (1000000000 / HZ))
> +#define JIFFIES_TO_NS(TIME) ((TIME) * (1000000000 / HZ))
> +

This hunk is already in mainline so it will be double defined now.

Thanks.

--
-ck
-
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: 2007-03-25 10:43    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site