bdberl/int_test/bug200_SUITE.erl

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%% -------------------------------------------------------------------
%%
%% bdberl: Port Driver Bug200 tests
%% Copyright (c) 2008 The Hive. All rights reserved.
%%
%% -------------------------------------------------------------------
-module(bug200_SUITE).
-compile(export_all).
-define(PROCS, 32).
all() ->
[bug200].
bug200(_Config) ->
%% Spin up 15 processes (async thread pool is 10)
start_procs(?PROCS),
wait_for_finish(?PROCS).
start_procs(0) ->
ok;
start_procs(Count) ->
spawn_link(?MODULE, bug200_run, [self()]),
start_procs(Count-1).
wait_for_finish(0) ->
ok;
wait_for_finish(Count) ->
receive
{finished, Pid} ->
ct:print("~p is done; ~p remaining.\n", [Pid, Count-1]),
wait_for_finish(Count-1)
end.
bug200_run(Owner) ->
%% Seed the RNG
{A1, A2, A3} = now(),
random:seed(A1, A2, A3),
%% Start bug200ing
bug200_incr_loop(Owner, 1000).
bug200_incr_loop(Owner, 0) ->
Owner ! {finished, self()};
bug200_incr_loop(Owner, Count) ->
% ct:print("~p", [Count]),
%% Choose random key
Key = random:uniform(1200),
File = "bug200_" ++ integer_to_list(random:uniform(16)) ++ ".bdb",
%% Start a txn that will read the current value of the key and increment by 1
F = fun(_Key, Value) ->
case Value of
not_found -> 0;
Value -> Value + 1
end
end,
%% Open up a port and database
{ok, DbRef} = bdberl:open(File, btree),
{ok, _} = bdberl:update(DbRef, Key, F),
ok = bdberl:close(DbRef),
bug200_incr_loop(Owner, Count-1).