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-rw-r--r--erts/emulator/test/time_SUITE.erl46
1 files changed, 40 insertions, 6 deletions
diff --git a/erts/emulator/test/time_SUITE.erl b/erts/emulator/test/time_SUITE.erl
index 3bd28a6d20..9bf3b90d91 100644
--- a/erts/emulator/test/time_SUITE.erl
+++ b/erts/emulator/test/time_SUITE.erl
@@ -320,7 +320,41 @@ timestamp(suite) ->
timestamp(doc) ->
["Test that os:timestamp works."];
timestamp(Config) when is_list(Config) ->
- repeating_timestamp_check(100000).
+ try
+ repeating_timestamp_check(100000)
+ catch
+ throw : {fail, Failure} ->
+ %%
+ %% Our time warping test machines currently warps
+ %% time every 6:th second. If we get a warp during
+ %% 10 seconds, assume this is a time warping test
+ %% and ignore the failure.
+ %%
+ case had_time_warp(10) of
+ true ->
+ {skip, "Seems to be time warp test run..."};
+ false ->
+ test_server:fail(Failure)
+ end
+ end.
+
+os_system_time_offset() ->
+ erlang:convert_time_unit(os:system_time() - erlang:monotonic_time(),
+ native, micro_seconds).
+
+had_time_warp(Secs) ->
+ had_time_warp(os_system_time_offset(), Secs).
+
+had_time_warp(OrigOffs, 0) ->
+ false;
+had_time_warp(OrigOffs, N) ->
+ receive after 1000 -> ok end,
+ case OrigOffs - os_system_time_offset() of
+ Diff when Diff > 500000; Diff < -500000 ->
+ true;
+ _Diff ->
+ had_time_warp(OrigOffs, N-1)
+ end.
repeating_timestamp_check(0) ->
ok;
@@ -346,15 +380,15 @@ repeating_timestamp_check(N) ->
NSecs = NA*1000000+NB+round(NC/1000000),
case Secs - NSecs of
TooLarge when TooLarge > 3600 ->
- test_server:fail(
- lists:flatten(
+ throw({fail,
+ lists:flatten(
io_lib:format("os:timestamp/0 is ~w s more than erlang:now/0",
- [TooLarge])));
+ [TooLarge]))});
TooSmall when TooSmall < -3600 ->
- test_server:fail(
+ throw({fail,
lists:flatten(
io_lib:format("os:timestamp/0 is ~w s less than erlang:now/0",
- [-TooSmall])));
+ [-TooSmall]))});
_ ->
ok
end,