bdberl/test/thrash_SUITE.erl

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2011-07-17 19:50:40 +00:00
%% -------------------------------------------------------------------
%%
%% bdberl: Port Driver Thrash tests
%% Copyright (c) 2008 The Hive. All rights reserved.
%%
%% Permission is hereby granted, free of charge, to any person obtaining a copy
%% of this software and associated documentation files (the "Software"), to deal
%% in the Software without restriction, including without limitation the rights
%% to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
%% copies of the Software, and to permit persons to whom the Software is
%% furnished to do so, subject to the following conditions:
%%
%% The above copyright notice and this permission notice shall be included in
%% all copies or substantial portions of the Software.
%%
%% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
%% IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
%% FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
%% AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
%% LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
%% OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
%% THE SOFTWARE.
%%
%% -------------------------------------------------------------------
-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} ->
ct:print("~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", [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(_Key, Value) ->
case Value of
not_found -> 0;
Value -> Value + 1
end
end,
{ok, _} = bdberl:update(0, Key, F),
thrash_incr_loop(Owner, Count-1).