[Orca-users] re: more info: dead zone on all graphs at same time

[Blair Zajac]

jeffrey.p.miller at kodak.com wrote:
> 
> >> jeffrey.p.miller at kodak.com wrote:
> >>
> >> I seem to have missed these responses to the thread (which I
> initiated!).
> >> Can someone re-cap
> >> what the recommended solution is?  Should I stop/start orcallator (on
> the
> >> clients that
> >> have the dead zones in the graphs) a few minutes prior to when the
> >> "server" runs orca?
> >> Should I load a patch?
> >
> >Depends upon the symptoms.  Is it all plots that show the problem or
> >just the CPU usage one?
> >
> >Best,
> >Blair
> 
> It appears to be only the CPU plots, and mostly (with one exception) on
> the systems that have very low (almost nill) CPU usage (newly set-up
> systems).
> 
> In another other case, the blank space (again on the CPU plot) only
> appears at the top of the graph.  Usually, the white blank space extends
> from the top to the bottom of the graph and appears to last for a few
> minutes.

Jeff,

Try this patch to live_rules.se in the SE include directory.  It
prevents a problem where the total CPU time is greater than 100%,
causing Orca not to plot the data:

--- include/live_rules.se.0     2002-07-16 18:02:54.000000000 -0700
+++ include/live_rules.se       2002-12-28 21:39:26.000000000 -0800
@@ -121,7 +121,7 @@
 /* function to total up global per_cpu data into vmstat form */
 p_vmstat vmglobal_total() {
   int i;
-  int total;
+  double total;
   p_vmstat pvm;

   pvm = GLOBAL_pvm[0];
@@ -151,8 +151,15 @@
 #endif
   }
   total = pvm.user_time + pvm.system_time + pvm.wait_time + pvm.idle_time;
-  if (total < 100) {
-    pvm.idle_time += (100 - total);
+  if (total < 100.0) {
+    pvm.idle_time += (100.0 - total);
+  }
+
+  /* Make sure that total is never greater than 100%.  Better less
+   * than 100% than greater than 100%.  */
+  total = pvm.user_time + pvm.system_time + pvm.wait_time + pvm.idle_time;
+  if (total > 100.0) {
+    pvm.idle_time -= (total - 100.0);
   }
   return pvm;
 }


Best,
Blair

-- 
Blair Zajac <blair at orcaware.com>
Plots of your system's performance - http://www.orcaware.com/orca/