YDL/RedHat difference in "top"

[Bill Fink]

On Sat Aug 3 2002, Chris Ruprecht wrote:

> I have noticed, that the CPU state line in 'top' is missing in under YDL.=
>  Can=20
> anybody explain to me in simple words <grin> why that would be like that?

Hi Chris,

Here is a patch for procps (which contains top) that provides a
workaround for this:

diff -ur procps-2.0.7.dist/top.c procps-2.0.7.mod/top.c
--- procps-2.0.7.dist/top.c	Thu Jul 13 16:19:21 2000
+++ procps-2.0.7.mod/top.c	Tue Mar  5 01:12:25 2002
@@ -244,6 +244,7 @@
     int i;
 
     nr_cpu = sysconf (_SC_NPROCESSORS_ONLN);
+    if (nr_cpu < 1) nr_cpu = 1;
     cpu_mapping = (int *) xmalloc (sizeof (int) * nr_cpu);
     /* read cpuname */
     for (i=0; i< nr_cpu; i++) cpu_mapping[i]=i;

The problem is that on a UP kernel, sysconf (_SC_NPROCESSORS_ONLN)
returns 0.  My workaround patch just sets nr_cpu to 1 in this
eventuality and top now works fine for me.  Note I am using procps-2.0.7
on a 2.4.19-pre8-ben0 kernel.

						-Regards

						-Bill