1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2021-2021. 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(perf_SUITE).
-export([all/0, suite/0, init_per_suite/1, end_per_suite/1]).
-export([symbols/1, annotate/1]).
suite() ->
[{timetrap, {minutes, 4}}].
all() ->
[symbols, annotate].
init_per_suite(Config) ->
case erlang:system_info(emu_flavor) =:= jit andalso
os:find_executable("perf") =/= false of
false ->
{skip, "perf not found"};
_Perf ->
PerfVsn = os:cmd("perf version"),
case re:run(PerfVsn, "perf version ([^.])",
[{capture,all_but_first,list}]) of
{match,[Vsn]} ->
case list_to_integer(Vsn) >= 5 of
true ->
BuildIdDir = "--buildid-dir " ++
filename:join(
proplists:get_value(priv_dir, Config),
".debug"),
DataFile = filename:join(
proplists:get_value(priv_dir, Config),
"init_test.data"),
Cmd = "perf " ++ BuildIdDir ++ " record -q -o " ++ DataFile ++ " ls",
os:cmd(Cmd),
Script = os:cmd("perf " ++ BuildIdDir ++ " script -i " ++ DataFile),
ct:log("~ts",[Script]),
case re:run(Script, "^\\W+ls",[multiline]) of
{match, _} ->
[{sobefore,get_tmp_so_files()},
{buildiddir,BuildIdDir}|Config];
nomatch ->
{skip, "could not run `"++ Cmd ++"`"}
end;
false ->
{skip,"too old perf version: " ++ PerfVsn}
end;
_ ->
{skip,"unknown old perf version: " ++ PerfVsn}
end
end.
end_per_suite(Config) ->
%% perf inject writes data to /tmp and ~/.debug/tmp so we need to clean
%% that up after the tests are done.
SoToDelete = get_tmp_so_files() -- proplists:get_value(sobefore, Config),
lists:foreach(
fun(File) ->
case file:delete(File) of
{error,eperm} ->
ok = file:del_dir_r(File);
ok ->
ok
end
end, SoToDelete),
ok.
get_tmp_so_files() ->
{ok, Home} = init:get_argument(home),
filelib:wildcard("/tmp/jitted-*.so") ++
filelib:wildcard(filename:join([Home,".debug","tmp","jitted-*.so"])).
symbols(Config) ->
BuildIdDir = proplists:get_value(buildiddir, Config),
DataFile = filename:join(
proplists:get_value(priv_dir, Config),
atom_to_list(?FUNCTION_NAME) ++ ".data"),
os:cmd("perf "++ BuildIdDir ++" record -q -o " ++ DataFile ++ " " ++
"erl +S 1 +JPperf true -noshell -eval '[lists:seq(1,10000) || _ <- lists:seq(1,1000)].' -s init stop"),
Script = os:cmd("perf "++ BuildIdDir ++" script -i " ++ DataFile),
case re:run(Script,"\\$lists:seq[^/]+/[0-9]",[global,{capture,first,list}]) of
{match,Matches} ->
ct:log("Found these symbols: ~p",[lists:usort(Matches)]),
ok;
nomatch ->
ct:fail("Did not find lists:seq symbol in:~n~ts",[Script])
end.
annotate(Config) ->
BuildIdDir = proplists:get_value(buildiddir, Config),
DataFile = filename:join(
proplists:get_value(priv_dir, Config),
atom_to_list(?FUNCTION_NAME) ++ ".data"),
os:cmd("perf "++ BuildIdDir ++" record -k mono -q -o " ++ DataFile ++ " " ++
"erl +S 1 +JPperf true -noshell -eval '[lists:seq(1,10000) || _ <- lists:seq(1,1000)].' -s init stop"),
Script = os:cmd("perf "++ BuildIdDir ++" script -i " ++ DataFile),
%% When doing "perf inject" the symbol of each function is changed
%% from $lists:seq_loop/3 to lists:seq_loop/3. I don't know why that
%% is, seems like a very odd bug in perf... so we only include it
%% in our match if it exists
{match, Symbols} = re:run(Script, "\\$?lists:seq[^/]+/[0-9]+",
[global,{capture,first,list}]),
[Symbol|_] = lists:usort(Symbols),
JitFile = DataFile ++ ".jit.data",
"" = os:cmd("perf "++ BuildIdDir ++" inject -j -i " ++ DataFile ++ " -o " ++ JitFile),
Anno = os:cmd("perf "++ BuildIdDir ++" annotate --stdio -i " ++ JitFile ++ " " ++ Symbol ++ ""),
case re:run(Anno,"Disassembly of section .text:") of
{match,_} ->
ok;
nomatch ->
ct:log("Did not find disassembly test for ~ts.~n~ts",
[Symbol, Anno])
end.
|
