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-rw-r--r--lib/observer/src/etop.erl24
-rw-r--r--lib/observer/src/etop_txt.erl24
-rw-r--r--lib/observer/src/observer_pro_wx.erl8
-rw-r--r--lib/runtime_tools/src/observer_backend.erl7
4 files changed, 38 insertions, 25 deletions
diff --git a/lib/observer/src/etop.erl b/lib/observer/src/etop.erl
index fcb900960b..925f4456bb 100644
--- a/lib/observer/src/etop.erl
+++ b/lib/observer/src/etop.erl
@@ -23,7 +23,7 @@
-export([start/0, start/1, config/2, stop/0, dump/1, help/0]).
%% Internal
-export([update/1]).
--export([loadinfo/1, meminfo/2, getopt/2]).
+-export([loadinfo/2, meminfo/2, getopt/2]).
-include("etop.hrl").
-include("etop_defs.hrl").
@@ -319,18 +319,18 @@ output(graphical) -> exit({deprecated, "Use observer instead"});
output(text) -> etop_txt.
-loadinfo(SysI) ->
+loadinfo(SysI,Prev) ->
#etop_info{n_procs = Procs,
run_queue = RQ,
now = Now,
wall_clock = WC,
runtime = RT} = SysI,
- Cpu = calculate_cpu_utilization(WC,RT),
+ Cpu = calculate_cpu_utilization(WC,RT,Prev#etop_info.runtime),
Clock = io_lib:format("~2.2.0w:~2.2.0w:~2.2.0w",
tuple_to_list(element(2,calendar:now_to_datetime(Now)))),
{Cpu,Procs,RQ,Clock}.
-calculate_cpu_utilization({_,WC},{_,RT}) ->
+calculate_cpu_utilization({_,WC},{_,RT},_) ->
%% Old version of observer_backend, using statistics(wall_clock)
%% and statistics(runtime)
case {WC,RT} of
@@ -341,15 +341,23 @@ calculate_cpu_utilization({_,WC},{_,RT}) ->
_ ->
round(100*RT/WC)
end;
-calculate_cpu_utilization(_,undefined) ->
+calculate_cpu_utilization(_,undefined,_) ->
%% First time collecting - no cpu utilization has been measured
%% since scheduler_wall_time flag is not yet on
0;
-calculate_cpu_utilization(_,RTInfo) ->
+calculate_cpu_utilization(WC,RTInfo,undefined) ->
+ %% Second time collecting - RTInfo shows scheduler_wall_time since
+ %% flag was set to true. Faking previous values by setting
+ %% everything to zero.
+ ZeroRT = [{Id,0,0} || {Id,_,_} <- RTInfo],
+ calculate_cpu_utilization(WC,RTInfo,ZeroRT);
+calculate_cpu_utilization(_,RTInfo,PrevRTInfo) ->
%% New version of observer_backend, using statistics(scheduler_wall_time)
- Sum = lists:foldl(fun({_,A,T},{AAcc,TAcc}) -> {A+AAcc,T+TAcc} end,
+ Sum = lists:foldl(fun({{_, A0, T0}, {_, A1, T1}},{AAcc,TAcc}) ->
+ {(A1 - A0)+AAcc,(T1 - T0)+TAcc}
+ end,
{0,0},
- RTInfo),
+ lists:zip(PrevRTInfo,RTInfo)),
case Sum of
{0,0} ->
0;
diff --git a/lib/observer/src/etop_txt.erl b/lib/observer/src/etop_txt.erl
index 3b4c176478..6b8f9df24f 100644
--- a/lib/observer/src/etop_txt.erl
+++ b/lib/observer/src/etop_txt.erl
@@ -22,35 +22,35 @@
%%-compile(export_all).
-export([init/1,stop/1]).
--export([do_update/3]).
+-export([do_update/4]).
-include("etop.hrl").
-include("etop_defs.hrl").
--import(etop,[loadinfo/1,meminfo/2]).
+-import(etop,[loadinfo/2,meminfo/2]).
-define(PROCFORM,"~-15w~-20s~8w~8w~8w~8w ~-20s~n").
stop(Pid) -> Pid ! stop.
init(Config) ->
- loop(Config).
+ loop(#etop_info{},Config).
-loop(Config) ->
- Info = do_update(Config),
+loop(Prev,Config) ->
+ Info = do_update(Prev,Config),
receive
stop -> stopped;
- {dump,Fd} -> do_update(Fd,Info,Config), loop(Config);
- {config,_,Config1} -> loop(Config1)
- after Config#opts.intv -> loop(Config)
+ {dump,Fd} -> do_update(Fd,Info,Prev,Config), loop(Info,Config);
+ {config,_,Config1} -> loop(Info,Config1)
+ after Config#opts.intv -> loop(Info,Config)
end.
-do_update(Config) ->
+do_update(Prev,Config) ->
Info = etop:update(Config),
- do_update(standard_io,Info,Config).
+ do_update(standard_io,Info,Prev,Config).
-do_update(Fd,Info,Config) ->
- {Cpu,NProcs,RQ,Clock} = loadinfo(Info),
+do_update(Fd,Info,Prev,Config) ->
+ {Cpu,NProcs,RQ,Clock} = loadinfo(Info,Prev),
io:nl(Fd),
writedoubleline(Fd),
case Info#etop_info.memi of
diff --git a/lib/observer/src/observer_pro_wx.erl b/lib/observer/src/observer_pro_wx.erl
index ee6829b847..f07b9e295a 100644
--- a/lib/observer/src/observer_pro_wx.erl
+++ b/lib/observer/src/observer_pro_wx.erl
@@ -511,7 +511,13 @@ table_holder(#holder{info=Info, attrs=Attrs,
table_holder(S0);
{dump, Fd} ->
EtopInfo = (S0#holder.etop)#etop_info{procinfo=array:to_list(Info)},
- etop_txt:do_update(Fd, EtopInfo, #opts{node=Node}),
+ %% The empty #etop_info{} below is a dummy previous info
+ %% value. It is used by etop to calculate the scheduler
+ %% utilization since last update. When dumping to file,
+ %% there is no previous measurement to use, so we just add
+ %% a dummy here, and the value shown will be since the
+ %% tool was started.
+ etop_txt:do_update(Fd, EtopInfo, #etop_info{}, #opts{node=Node}),
file:close(Fd),
table_holder(S0);
stop ->
diff --git a/lib/runtime_tools/src/observer_backend.erl b/lib/runtime_tools/src/observer_backend.erl
index e943fb4a3e..b27bc63d15 100644
--- a/lib/runtime_tools/src/observer_backend.erl
+++ b/lib/runtime_tools/src/observer_backend.erl
@@ -314,13 +314,12 @@ etop_collect(Collector) ->
case SchedulerWallTime of
undefined ->
- spawn(fun() -> flag_holder_proc(Collector) end),
+ erlang:system_flag(scheduler_wall_time,true),
+ spawn(fun() -> flag_holder_proc(Collector) end),
ok;
_ ->
ok
- end,
-
- erlang:system_flag(scheduler_wall_time,true).
+ end.
flag_holder_proc(Collector) ->
Ref = erlang:monitor(process,Collector),