lkml.org 
[lkml]   [2007]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: CPU load
Date
On Monday 12 February 2007 18:10, malc wrote:
> On Mon, 12 Feb 2007, Con Kolivas wrote:
> > Lots of confusion comes from this, and often people think their pc
> > suddenly uses a lot less cpu when they change from 1000HZ to 100HZ and
> > use this as an argument/reason for changing to 100HZ when in fact the
> > massive _reported_ difference is simply worse accounting. Of course there
> > is more overhead going from 100 to 1000 but it doesn't suddenly make your
> > apps use 10 times more cpu.
>
> Yep. This, i belive, what made the mplayer developers incorrectly conclude
> that utilizing RTC suddenly made the code run slower, after all /proc/stat
> now claims that CPU load is higher, while in reality it stayed the same -
> it's the accuracy that has improved (somewhat)
>
> But back to the original question, does it look at what's running on timer
> interrupt only or any IRQ? (something which is more in line with my own
> observations)

During the timer interrupt only. However if you create any form of timer, they
will of course have some periodicity relationship with the timer interrupt.

--
-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: 2007-02-12 08:33    [W:0.105 / U:0.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site