diff options
Diffstat (limited to 'lib/stdlib/test/ets_SUITE.erl')
| -rw-r--r-- | lib/stdlib/test/ets_SUITE.erl | 57 |
1 files changed, 51 insertions, 6 deletions
diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl index c9d82ec5f5..9341300f90 100644 --- a/lib/stdlib/test/ets_SUITE.erl +++ b/lib/stdlib/test/ets_SUITE.erl @@ -72,6 +72,7 @@ exit_many_many_tables_owner/1]). -export([write_concurrency/1, heir/1, give_away/1, setopts/1]). -export([bad_table/1, types/1]). +-export([otp_9423/1]). -export([init_per_testcase/2, end_per_testcase/2]). %% Convenience for manual testing @@ -143,7 +144,8 @@ all() -> otp_8166, exit_large_table_owner, exit_many_large_table_owner, exit_many_tables_owner, exit_many_many_tables_owner, write_concurrency, heir, - give_away, setopts, bad_table, types]. + give_away, setopts, bad_table, types, + otp_9423]. groups() -> [{new, [], @@ -5420,7 +5422,39 @@ types_do(Opts) -> ?line verify_etsmem(EtsMem). - +otp_9423(doc) -> ["vm-deadlock caused by race between ets:delete and others on write_concurrency table"]; +otp_9423(Config) when is_list(Config) -> + InitF = fun(_) -> {0,0} end, + ExecF = fun({S,F}) -> + receive + stop -> + io:format("~p got stop\n", [self()]), + [end_of_work | {"Succeded=",S,"Failed=",F}] + after 0 -> + %%io:format("~p (~p) doing lookup\n", [self(), {S,F}]), + try ets:lookup(otp_9423, key) of + [] -> {S+1,F} + catch + error:badarg -> {S,F+1} + end + end + end, + FiniF = fun(R) -> R end, + case run_workers(InitF, ExecF, FiniF, infinite, 1) of + Pids when is_list(Pids) -> + %%[P ! start || P <- Pids], + repeat(fun() -> ets:new(otp_9423, [named_table, public, {write_concurrency,true}]), + ets:delete(otp_9423) + end, 10000), + [P ! stop || P <- Pids], + wait_pids(Pids), + ok; + + Skipped -> Skipped + end. + + + % % Utility functions: @@ -5434,21 +5468,30 @@ add_lists([E1|T1], [E2|T2], Acc) -> add_lists(T1, T2, [E1+E2 | Acc]). run_workers(InitF,ExecF,FiniF,Laps) -> + run_workers(InitF,ExecF,FiniF,Laps, 0). +run_workers(InitF,ExecF,FiniF,Laps, Exclude) -> case erlang:system_info(smp_support) of true -> - run_workers_do(InitF,ExecF,FiniF,Laps); + run_workers_do(InitF,ExecF,FiniF,Laps, Exclude); false -> {skipped,"No smp support"} end. - + run_workers_do(InitF,ExecF,FiniF,Laps) -> - NumOfProcs = erlang:system_info(schedulers), + run_workers_do(InitF,ExecF,FiniF,Laps, 0). +run_workers_do(InitF,ExecF,FiniF,Laps, Exclude) -> + ?line NumOfProcs = case erlang:system_info(schedulers) of + N when (N > Exclude) -> N - Exclude + end, io:format("smp starting ~p workers\n",[NumOfProcs]), Seeds = [{ProcN,random:uniform(9999)} || ProcN <- lists:seq(1,NumOfProcs)], Parent = self(), Pids = [spawn_link(fun()-> worker(Seed,InitF,ExecF,FiniF,Laps,Parent,NumOfProcs) end) || Seed <- Seeds], - wait_pids(Pids). + case Laps of + infinite -> Pids; + _ -> wait_pids(Pids) + end. worker({ProcN,Seed}, InitF, ExecF, FiniF, Laps, Parent, NumOfProcs) -> io:format("smp worker ~p, seed=~p~n",[self(),Seed]), @@ -5463,6 +5506,8 @@ worker_loop(0, _, State) -> State; worker_loop(_, _, [end_of_work|State]) -> State; +worker_loop(infinite, ExecF, State) -> + worker_loop(infinite,ExecF,ExecF(State)); worker_loop(N, ExecF, State) -> worker_loop(N-1,ExecF,ExecF(State)). |