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-rw-r--r--lib/compiler/test/test_lib.erl23
1 files changed, 17 insertions, 6 deletions
diff --git a/lib/compiler/test/test_lib.erl b/lib/compiler/test/test_lib.erl
index a8befbecd9..a5e2855f8c 100644
--- a/lib/compiler/test/test_lib.erl
+++ b/lib/compiler/test/test_lib.erl
@@ -18,11 +18,13 @@
%%
-module(test_lib).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
-compile({no_auto_import,[binary_part/2]}).
--export([recompile/1,parallel/0,uniq/0,opt_opts/1,get_data_dir/1,
+-export([id/1,recompile/1,parallel/0,uniq/0,opt_opts/1,get_data_dir/1,
smoke_disasm/1,p_run/2,binary_part/2]).
+id(I) -> I.
+
recompile(Mod) when is_atom(Mod) ->
case whereis(cover_server) of
undefined -> ok;
@@ -44,6 +46,10 @@ smoke_disasm(File) when is_list(File) ->
Res = beam_disasm:file(File),
{beam_file,_Mod} = {element(1, Res),element(2, Res)}.
+%% If we are running cover, we don't want to run test cases that
+%% invokes the compiler in parallel, as doing so would probably
+%% be slower than running them sequentially.
+
parallel() ->
case ?t:is_cover() orelse erlang:system_info(schedulers) =:= 1 of
true -> [];
@@ -90,13 +96,18 @@ get_data_dir(Config) ->
%% Will fail the test case if there were any errors.
p_run(Test, List) ->
+ S = erlang:system_info(schedulers),
N = case ?t:is_cover() of
false ->
- erlang:system_info(schedulers);
+ S + 1;
true ->
- %% Cover is running. Using more than one process
- %% will probably only slow down compilation.
- 1
+ %% Cover is running. Using too many processes
+ %% could slow us down. Measurements on my computer
+ %% showed that using 4 parallel processes was
+ %% slightly faster than using 3. Using more than
+ %% 4 would not buy us much and could actually be
+ %% slower.
+ max(S, 4)
end,
p_run_loop(Test, List, N, [], 0, 0).