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authorSverker Eriksson <[email protected]>2017-08-30 21:00:35 +0200
committerSverker Eriksson <[email protected]>2017-08-30 21:00:35 +0200
commit44a83c8860bbd00878c720a7b9d940b4630bab8a (patch)
tree101b3c52ec505a94f56c8f70e078ecb8a2e8c6cd /lib/observer/src/etop.erl
parent7c67bbddb53c364086f66260701bc54a61c9659c (diff)
parent040bdce67f88d833bfb59adae130a4ffb4c180f0 (diff)
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Merge tag 'OTP-20.0' into sverker/20/binary_to_atom-utf8-crash/ERL-474/OTP-14590
Diffstat (limited to 'lib/observer/src/etop.erl')
-rw-r--r--lib/observer/src/etop.erl40
1 files changed, 27 insertions, 13 deletions
diff --git a/lib/observer/src/etop.erl b/lib/observer/src/etop.erl
index fcb900960b..f0990f1f25 100644
--- a/lib/observer/src/etop.erl
+++ b/lib/observer/src/etop.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2002-2016. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2017. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -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").
@@ -81,7 +81,7 @@ check_runtime_config(accumulate,A) when A=:=true; A=:=false -> ok;
check_runtime_config(_Key,_Value) -> error.
dump(File) ->
- case file:open(File,[write]) of
+ case file:open(File,[write,{encoding,utf8}]) of
{ok,Fd} -> etop_server ! {dump,Fd};
Error -> Error
end.
@@ -161,7 +161,7 @@ data_handler(Reader, Opts) ->
{'EXIT', EPid, Reason} when EPid == Opts#opts.out_proc ->
case Reason of
normal -> ok;
- _ -> io:format("Output server crashed: ~p~n",[Reason])
+ _ -> io:format("Output server crashed: ~tp~n",[Reason])
end,
stop(Opts),
out_proc_stopped;
@@ -180,10 +180,16 @@ stop(Opts) ->
end,
unregister(etop_server).
-update(#opts{store=Store,node=Node,tracing=Tracing}=Opts) ->
+update(#opts{store=Store,node=Node,tracing=Tracing,intv=Interval}=Opts) ->
Pid = spawn_link(Node,observer_backend,etop_collect,[self()]),
Info = receive {Pid,I} -> I
- after 1000 -> exit(connection_lost)
+ after Interval ->
+ %% Took more than the update interval to fetch
+ %% data. Either the connection is lost or the
+ %% fetching took too long...
+ io:format("Timeout when waiting for process info from "
+ "node ~p; exiting~n", [Node]),
+ exit(timeout)
end,
#etop_info{procinfo=ProcInfo} = Info,
ProcInfo1 =
@@ -319,18 +325,18 @@ 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 +347,23 @@ 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;