bdberl/test/thrash_SUITE.erl
2008-12-12 14:43:09 -06:00

80 lines
2 KiB
Erlang

%% -------------------------------------------------------------------
%%
%% bdberl: Port Driver Thrash tests
%% Copyright (c) 2008 The Hive. All rights reserved.
%%
%% -------------------------------------------------------------------
-module(thrash_SUITE).
-compile(export_all).
all() ->
[test_thrash].
-define(PROCS, 10).
test_thrash(_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, thrash_run, [self()]),
start_procs(Count-1).
wait_for_finish(0) ->
ok;
wait_for_finish(Count) ->
receive
{finished, Pid} ->
io:format("~p is done; ~p remaining.\n", [Pid, Count-1]),
wait_for_finish(Count-1)
end.
thrash_run(Owner) ->
%% Seed the RNG
{A1, A2, A3} = now(),
random:seed(A1, A2, A3),
%% Open up a port and database
{ok, 0} = bdberl:open("thrash", btree),
%% Start thrashing
thrash_incr_loop(Owner, 1000).
thrash_incr_loop(Owner, 0) ->
Owner ! {finished, self()};
thrash_incr_loop(Owner, Count) ->
ct:print("~p\n", [Count]),
%% Choose random key
Key = random:uniform(1200),
%% Start a txn that will read the current value of the key and increment by 1
F = fun() ->
case bdberl:get(0, Key, [rmw]) of
not_found ->
Value = 0;
{ok, Value} ->
Value
end,
ok = bdberl:put(0, Key, Value)
end,
ok = do_txn(F, 0),
thrash_incr_loop(Owner, Count-1).
do_txn(F, Count) ->
case bdberl:txn_begin() of
ok ->
case catch(F()) of
{'EXIT', _Reason} ->
io:format("Txn attempt ~p failed; retrying", [Count]),
do_txn(F, Count+1);
_Other ->
ok = bdberl:txn_commit()
end;
{error, _Reason} ->
do_txn(F, Count+1)
end.