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authorBjörn Gustavsson <bjorn@erlang.org>2014-02-05 14:40:15 +0100
committerBjörn Gustavsson <bjorn@erlang.org>2014-02-20 12:42:59 +0100
commit1c8a57ce030907596bcddf14ce4b676f6adb3a57 (patch)
tree207f3debbfb6f4040fd56b53355e7b8834169769 /lib
parentc0667d05f1295930dacc80f82b985183fd800961 (diff)
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Speed up bs_construct_SUITE:dynamic/1
The original test comes from the emulator test suite for testing binary syntax in the run-time system. Running interpreted it can be quite slow, especially when the system has been compiled with the configure option --enable-native-libs (probably because of very many context switches between native code and BEAM code). Speed up the test by scaling down the size of binaries from 128 bits to 64 bits. That should speed up the test roughly four times. By running the little and big endian tests in parallel we will cut that time in half. Thus all in all the test will run roughly 8 times faster.
Diffstat (limited to 'lib')
-rw-r--r--lib/debugger/test/bs_construct_SUITE.erl40
1 files changed, 24 insertions, 16 deletions
diff --git a/lib/debugger/test/bs_construct_SUITE.erl b/lib/debugger/test/bs_construct_SUITE.erl
index 4870c87d74..8a6798c6ad 100644
--- a/lib/debugger/test/bs_construct_SUITE.erl
+++ b/lib/debugger/test/bs_construct_SUITE.erl
@@ -647,19 +647,27 @@ make_sub_bin(Bin0) ->
%% give the same result.
dynamic(Config) when is_list(Config) ->
- ?line dynamic_1(fun dynamic_big/5),
- ?line dynamic_1(fun dynamic_little/5),
+ Ps = [spawn_monitor(fun() ->
+ dynamic_1(Fun)
+ end) || Fun <- [fun dynamic_big/5,
+ fun dynamic_little/5]],
+ [receive
+ {'DOWN',Ref,process,Pid,normal} ->
+ ok;
+ {'DOWN',Ref,process,Pid,Exit} ->
+ ?t:fail({Pid,Exit})
+ end || {Pid,Ref} <- Ps],
ok.
dynamic_1(Dynamic) ->
- <<Lpad:128>> = erlang:md5([0]),
- <<Rpad:128>> = erlang:md5([1]),
- <<Int:128>> = erlang:md5([2]),
- 8385 = dynamic_2(0, {Int,Lpad,Rpad,Dynamic}, 0).
+ <<Lpad:64,_/binary>> = erlang:md5([0]),
+ <<Rpad:64,_/binary>> = erlang:md5([1]),
+ <<Int:64,_/binary>> = erlang:md5([2]),
+ 2145 = dynamic_2(0, {Int,Lpad,Rpad,Dynamic}, 0).
-dynamic_2(129, _, Count) -> Count;
+dynamic_2(64+1, _, Count) -> Count;
dynamic_2(Bef, Data, Count0) ->
- Count = dynamic_3(Bef, 128-Bef, Data, Count0),
+ Count = dynamic_3(Bef, 64-Bef, Data, Count0),
dynamic_2(Bef+1, Data, Count).
dynamic_3(_, -1, _, Count) -> Count;
@@ -680,13 +688,13 @@ dynamic_big(Bef, N, Int, Lpad, Rpad) ->
<<MaskedInt:N>> = NumBin,
%% Construct the binary in two different ways.
- Bin = id(<<Lpad:Bef,NumBin/bitstring,Rpad:(128-Bef-N)>>),
- Bin = <<Lpad:Bef,Int:N,Rpad:(128-Bef-N)>>,
+ Bin = id(<<Lpad:Bef,NumBin/bitstring,Rpad:(64-Bef-N)>>),
+ Bin = <<Lpad:Bef,Int:N,Rpad:(64-Bef-N)>>,
%% Further verify the result by matching.
LpadMasked = Lpad band ((1 bsl Bef) - 1),
- RpadMasked = Rpad band ((1 bsl (128-Bef-N)) - 1),
- Rbits = (128-Bef-N),
+ RpadMasked = Rpad band ((1 bsl (64-Bef-N)) - 1),
+ Rbits = (64-Bef-N),
<<LpadMasked:Bef,MaskedInt:N,RpadMasked:Rbits>> = id(Bin),
ok.
@@ -696,13 +704,13 @@ dynamic_little(Bef, N, Int, Lpad, Rpad) ->
<<MaskedInt:N/little>> = NumBin,
%% Construct the binary in two different ways.
- Bin = id(<<Lpad:Bef/little,NumBin/bitstring,Rpad:(128-Bef-N)/little>>),
- Bin = <<Lpad:Bef/little,Int:N/little,Rpad:(128-Bef-N)/little>>,
+ Bin = id(<<Lpad:Bef/little,NumBin/bitstring,Rpad:(64-Bef-N)/little>>),
+ Bin = <<Lpad:Bef/little,Int:N/little,Rpad:(64-Bef-N)/little>>,
%% Further verify the result by matching.
LpadMasked = Lpad band ((1 bsl Bef) - 1),
- RpadMasked = Rpad band ((1 bsl (128-Bef-N)) - 1),
- Rbits = (128-Bef-N),
+ RpadMasked = Rpad band ((1 bsl (64-Bef-N)) - 1),
+ Rbits = (64-Bef-N),
<<LpadMasked:Bef/little,MaskedInt:N/little,RpadMasked:Rbits/little>> = id(Bin),
ok.