Re: Top No CPU Stats


Subject: Re: Top No CPU Stats
From: Ben Stanley (bds02@uow.edu.au)
Date: Tue Mar 05 2002 - 04:34:29 MST


Hmmm... I tried building a 2.4.18 kernel, but now the mol kernel module
won't run or compile against it...

I see people here use a patch by benh. Why is this patch useful? Where
do you get it? Does it fix problems with mol?

Curious,
Ben.

Bill Fink wrote:

>On Wed Feb 20 2002, Duane wrote:
>
>>My top does not display the "CPU states: 0.0% user, 0.3% system, 0.0% nice,
>>99.6% idle" information. I tried starting it up with the -C switch. This
>>brings up the CPU stats line, but everything shows as 0.0% no mater what
>>I am doing.
>>
>>This is a 7200/120 YD2.1 2.4.18-rc1 benh kernel (this also happened with
>>the original kernel). Has anyone had this happen or know of a fix?
>>
>
>Hi Duane,
>
>I had the same thing happen when I upgraded from a 2.4.6 to a
>2.4.18-ben0 kernel. I tracked this down to the following code
>in top.c (top is part of the procps-2.0.7-4 RPM on YDL 2.1):
>
> nr_cpu = sysconf (_SC_NPROCESSORS_ONLN);
>
>The problem is that sysconf is returning 0 for _SC_NPROCESSORS_ONLN.
>As a simple workaround, I added the following line immediately after
>the call to sysconf:
>
> if (nr_cpu < 1) nr_cpu = 1;
>
>Now I once again get the "CPU states" line that includes the idle time.
>This is obviously not the proper solution, but I don't have time to dig
>any further into why the sysconf call isn't working. I assume sysconf
>is part of glibc. Besides upgrading the kernel from 2.4.6 to 2.4.18-ben0,
>I had also recently done a yup update which update glibc from glibc-2.2.1-0f
>to glibc-2.2.4-19k, so I'm not sure which change is the culprit.
>
>Perhaps someone else might have a clue as to why the sysconf call is
>returning 0 for _SC_NPROCESSORS_ONLN, but at least the quick hack above
>will get you a working top.
>
> -Bill
>



This archive was generated by hypermail 2a24 : Tue Mar 05 2002 - 04:46:53 MST