[observer] Improve measurement of CPU utilization in etop

Now using scheduler_wall_time instead of runtime/wall_clock to get cpu
utilization. The old version could give CPU utilization far beyond 100%.

Also, a bug which sometimes gave a badarith when calculating the CPU
utilization is corrected.

1 files changed, 12 insertions, 11 deletions

diff --git a/lib/runtime_tools/include/observer_backend.hrl b/lib/runtime_tools/include/observer_backend.hrl
index 4be9baca5b..91647a4468 100644
--- a/lib/runtime_tools/include/observer_backend.hrl
+++ b/lib/runtime_tools/include/observer_backend.hrl
@@ -1,26 +1,27 @@
-%% ``The contents of this file are subject to the Erlang Public License,
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2002-2013. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
 %% compliance with the License. You should have received a copy of the
 %% Erlang Public License along with this software. If not, it can be
-%% retrieved via the world wide web at http://www.erlang.org/.
-%% 
+%% retrieved online at http://www.erlang.org/.
+%%
 %% Software distributed under the License is distributed on an "AS IS"
 %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 %% the License for the specific language governing rights and limitations
 %% under the License.
-%% 
-%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
-%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
-%% AB. All Rights Reserved.''
-%% 
-%%     $Id$
+%%
+%% %CopyrightEnd%
 %%
 
 -record(etop_info, 
 	{now = {0, 0, 0},
 	 n_procs = 0,
-	 wall_clock = {0, 0},
-	 runtime = {0, 0},
+	 wall_clock,
+	 runtime,
 	 run_queue = 0,
 	 alloc_areas = [],
 	 memi = [{total, 0},