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%%
%% %CopyrightBegin%
%%
%% 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.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(etop_txt).
-author('siri@erix.ericsson.se').
%%-compile(export_all).
-export([init/1,stop/1]).
-export([do_update/4]).
-include("etop.hrl").
-include("etop_defs.hrl").
-define(DEFAULT_WIDTH, 89).
-record(field_widths, {cols :: pos_integer(),
used_cols :: pos_integer(),
init_func :: pos_integer(),
reds :: pos_integer(),
mem :: pos_integer(),
msgq :: pos_integer(),
curr_func :: pos_integer()}).
-import(etop,[loadinfo/2,meminfo/2]).
stop(Pid) -> Pid ! stop.
init(Config) ->
loop(#etop_info{},Config).
loop(Prev,Config) ->
Info = do_update(Prev,Config),
receive
stop -> stopped;
{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(Prev,Config) ->
Info = etop:update(Config),
do_update(standard_io,Info,Prev,Config).
do_update(Fd,Info,Prev,Config) ->
{Cpu,NProcs,RQ,Clock} = loadinfo(Info,Prev),
FieldWidths = calc_field_widths(Info#etop_info.procinfo),
io:nl(Fd),
writedoubleline(Fd, FieldWidths),
case Info#etop_info.memi of
undefined ->
io:fwrite(Fd, " ~-72w~10s~n"
" Load: cpu ~8w~n"
" procs~8w~n"
" runq ~8w~n",
[Config#opts.node,Clock,
Cpu,NProcs,RQ]);
Memi ->
[Tot,Procs,Atom,Bin,Code,Ets] =
meminfo(Memi, [total,processes,atom,binary,code,ets]),
io:fwrite(Fd, ?SYSFORM,
[Config#opts.node,Clock,
Cpu,Tot,Bin,
NProcs,Procs,Code,
RQ,Atom,Ets])
end,
io:nl(Fd),
writepinfo_header(Fd, FieldWidths),
writesingleline(Fd, FieldWidths),
writepinfo(Fd, Info#etop_info.procinfo, modifier(Fd), FieldWidths),
writedoubleline(Fd, FieldWidths),
io:nl(Fd),
Info.
calc_field_widths(ProcInfoL) ->
Cols = case io:columns() of
{ok, IoCols} -> max(IoCols, ?DEFAULT_WIDTH);
{error, enotsup} -> ?DEFAULT_WIDTH
end,
%% There is a priority with the field calculation since it's done
%% sequential with all fields deducted with their default values from
%% start. If any field eventually exceed the column budget, the rest of the
%% columns will get their default widths.
%% Calculate columns left. NOTE: The extra spaces between reds/mem/msgq.
%% Subsequent calculations adds default width then deducts calculated width.
%% See proc_format/2 for fields format.
%% Columns: pid, init_func, time, reds, mem, msgq, curr_func.
ColsLeft0 = Cols - 15 - 20 - 8 - 8 - 1 - 8 - 1 - 8 - 20,
RedsWidth = get_width(reds, ProcInfoL, ColsLeft0),
ColsLeft1 = ColsLeft0 + 8 - RedsWidth,
MemWidth = get_width(mem, ProcInfoL, ColsLeft1),
ColsLeft2 = ColsLeft1 + 8 - MemWidth,
MsgQWidth= get_width(msgq, ProcInfoL, ColsLeft2),
ColsLeft3 = ColsLeft2 + 8 - MsgQWidth,
%% Use the rest for initial and current function fields
if ColsLeft3 > 0 ->
%% compensate field start width for rounding
FieldSize = 19 + round((ColsLeft3 - 1) / 2),
InitFuncWidth = FieldSize,
CurrFuncWidth = FieldSize;
true ->
InitFuncWidth = 20,
CurrFuncWidth = 20
end,
%% Extra space between reds/mem, extra space due to rounding
UsedCols =
15 + InitFuncWidth + 8 + RedsWidth + 1 + MemWidth + 1
+ MsgQWidth + CurrFuncWidth + 1,
#field_widths{cols = Cols,
used_cols = UsedCols,
init_func = InitFuncWidth,
reds = RedsWidth,
mem = MemWidth,
msgq = MsgQWidth,
curr_func = CurrFuncWidth}.
get_width(reds, ProcInfoL, ColsLeft) ->
get_width(4, ProcInfoL, ColsLeft);
get_width(mem, ProcInfoL, ColsLeft) ->
get_width(3, ProcInfoL, ColsLeft);
get_width(msgq, ProcInfoL, ColsLeft) ->
get_width(8, ProcInfoL, ColsLeft);
%% Get the maximum width of the field at place N in #sysinfo{}.
%% Calculate the maximum width by taking the maximum width (by taking common
%% logarithm of largest number) then check if is larger than 8 and that it
%% fits the column budget, if so return that value; otherwise return 8.
get_width(N, ProcInfoL, ColsLeft) ->
MaxNum = lists:foldr(fun(Info, Acc)
when element(N, Info) > Acc ->
element(N, Info);
(_, Acc) ->
Acc
end,
0,
ProcInfoL),
MaxWidth =
if MaxNum > 0 -> round(math:log10(MaxNum)) + 1;
true -> 1 %% logarithm defined in R_n, n > 0.
end,
if MaxWidth > 8 andalso ColsLeft - MaxWidth > 0 ->
MaxWidth;
true ->
8
end.
writepinfo_header(Fd, #field_widths{init_func = InitFunc, reds = Reds,
mem = Mem, msgq = MsgQ}) ->
%% Add spaces between variable width columns.
Header =
"Pid Name or Initial Func"
++ lists:duplicate(max(InitFunc - 16, 4), $\s) ++
"Time"
++ lists:duplicate(max(Reds - 4, 4), $\s) ++
"Reds"
++ lists:duplicate(max(Mem - 5, 3), $\s) ++
"Memory"
++ lists:duplicate(max(MsgQ - 3, 5), $\s) ++
"MsgQ Current Function\n",
io:fwrite(Fd, Header, []).
writesingleline(Fd, FieldWidths) -> writedupline(Fd, $-, FieldWidths).
writedoubleline(Fd, FieldWidths) -> writedupline(Fd, $=, FieldWidths).
writedupline(Fd, Char, #field_widths{used_cols = UsedCols}) ->
Line = lists:duplicate(UsedCols, Char) ++ "\n",
io:fwrite(Fd, Line, []).
writepinfo(Fd,[#etop_proc_info{pid=Pid,
mem=Mem,
reds=Reds,
name=Name,
runtime=Time,
cf=MFA,
mq=MQ}
|T],
Modifier, FieldWidths) ->
io:fwrite(Fd,proc_format(Modifier, FieldWidths),
[Pid,to_string(Name,Modifier),Time,Reds,Mem,MQ,
to_string(MFA,Modifier)]),
writepinfo(Fd,T,Modifier, FieldWidths);
writepinfo(_Fd,[],_,_) ->
ok.
proc_format(Modifier, #field_widths{init_func = InitFunc, reds = Reds,
mem = Mem, msgq = MsgQ,
curr_func = CurrFunc}) ->
"~-15w"
"~-" ++ i2l(InitFunc) ++ Modifier ++ "s"
"~8w"
"~" ++ i2l(Reds) ++ "w "
"~" ++ i2l(Mem) ++"w "
"~" ++ i2l(MsgQ) ++ "w "
"~-" ++ i2l(CurrFunc) ++ Modifier ++ "s~n".
to_string({M,F,A},Modifier) ->
io_lib:format("~w:~"++Modifier++"w/~w",[M,F,A]);
to_string(Other,Modifier) ->
io_lib:format("~"++Modifier++"w",[Other]).
i2l(I) -> integer_to_list(I).
modifier(Device) ->
case encoding(Device) of
latin1 -> "";
_ -> "t"
end.
encoding(Device) ->
case io:getopts(Device) of
List when is_list(List) ->
proplists:get_value(encoding,List,latin1);
_ ->
latin1
end.
|
