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% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(couch_index_tests).
-include_lib("couch/include/couch_eunit.hrl").
-include_lib("couch/include/couch_db.hrl").
-include_lib("couch_mrview/include/couch_mrview.hrl").
-include_lib("stdlib/include/ms_transform.hrl").
-define(TIMEOUT, 1000).
setup() ->
DbName = ?tempdb(),
{ok, Db} = couch_db:create(DbName, [?ADMIN_CTX]),
ok = couch_db:close(Db),
create_design_doc(DbName, <<"_design/foo">>, <<"bar">>),
tracer_new(),
DbName.
teardown(DbName) ->
tracer_delete(),
couch_server:delete(DbName, [?ADMIN_CTX]).
couch_index_ioq_priority_test_() ->
{
"Test ioq_priority for views",
{
setup,
fun test_util:start_couch/0, fun test_util:stop_couch/1,
{
foreach,
fun setup/0, fun teardown/1,
[
fun check_io_priority_for_updater/1,
fun check_io_priority_for_compactor/1
]
}
}
}.
check_io_priority_for_updater(DbName) ->
?_test(begin
{ok, IndexerPid} = couch_index_server:get_index(
couch_mrview_index, DbName, <<"_design/foo">>),
CouchIndexUpdaterPid = updater_pid(IndexerPid),
tracer_record(CouchIndexUpdaterPid),
create_docs(DbName),
CommittedSeq = couch_util:with_db(DbName, fun(Db) -> couch_db:get_update_seq(Db) end),
couch_index:get_state(IndexerPid, CommittedSeq),
[UpdaterPid] = wait_spawn_event_for_pid(CouchIndexUpdaterPid),
[UpdaterMapProcess] = wait_spawn_by_anonymous_fun(
UpdaterPid, '-start_update/4-fun-0-'),
?assert(wait_set_io_priority(
UpdaterMapProcess, {view_update, DbName, <<"_design/foo">>})),
[UpdaterWriterProcess] = wait_spawn_by_anonymous_fun(
UpdaterPid, '-start_update/4-fun-1-'),
?assert(wait_set_io_priority(
UpdaterWriterProcess, {view_update, DbName, <<"_design/foo">>})),
ok
end).
check_io_priority_for_compactor(DbName) ->
?_test(begin
{ok, IndexerPid} = couch_index_server:get_index(
couch_mrview_index, DbName, <<"_design/foo">>),
{ok, CompactorPid} = couch_index:get_compactor_pid(IndexerPid),
tracer_record(CompactorPid),
create_docs(DbName),
couch_index:compact(IndexerPid),
wait_spawn_event_for_pid(CompactorPid),
[CompactorProcess] = wait_spawn_by_anonymous_fun(
CompactorPid, '-handle_call/3-fun-0-'),
?assert(wait_set_io_priority(
CompactorProcess, {view_compact, DbName, <<"_design/foo">>})),
ok
end).
create_docs(DbName) ->
{ok, Db} = couch_db:open(DbName, [?ADMIN_CTX]),
Doc1 = couch_doc:from_json_obj({[
{<<"_id">>, <<"doc1">>},
{<<"value">>, 1}
]}),
Doc2 = couch_doc:from_json_obj({[
{<<"_id">>, <<"doc2">>},
{<<"value">>, 2}
]}),
Doc3 = couch_doc:from_json_obj({[
{<<"_id">>, <<"doc3">>},
{<<"value">>, 3}
]}),
{ok, _} = couch_db:update_docs(Db, [Doc1, Doc2, Doc3]),
couch_db:ensure_full_commit(Db),
couch_db:close(Db).
create_design_doc(DbName, DDName, ViewName) ->
{ok, Db} = couch_db:open(DbName, [?ADMIN_CTX]),
DDoc = couch_doc:from_json_obj({[
{<<"_id">>, DDName},
{<<"language">>, <<"javascript">>},
{<<"views">>, {[
{ViewName, {[
{<<"map">>, <<"function(doc) { emit(doc.value, null); }">>}
]}}
]}}
]}),
{ok, Rev} = couch_db:update_doc(Db, DDoc, []),
couch_db:ensure_full_commit(Db),
couch_db:close(Db),
Rev.
wait_set_io_priority(Pid, IOPriority) ->
test_util:wait_value(fun() ->
does_process_set_io_priority(Pid, IOPriority)
end, true).
does_process_set_io_priority(Pid, IOPriority) ->
PutCallsArgs = find_calls_to_fun(Pid, {erlang, put, 2}),
lists:any(fun([_, Priority]) -> Priority =:= IOPriority end, PutCallsArgs).
wait_events(MatchSpec) ->
test_util:wait_other_value(fun() -> select(MatchSpec) end, []).
find_spawned_by_anonymous_fun(ParentPid, Name) ->
AnonymousFuns = select(ets:fun2ms(fun
({spawned, Pid, _TS, _Name, _Dict, [PPid, {erlang, apply, [Fun, _]}]})
when is_function(Fun) andalso PPid =:= ParentPid -> {Pid, Fun}
end)),
lists:filtermap(fun({Pid, Fun}) ->
case erlang:fun_info(Fun, name) of
{name, Name} -> {true, Pid};
_ -> false
end
end, AnonymousFuns).
find_calls_to_fun(Pid, {Module, Function, Arity}) ->
select(ets:fun2ms(fun
({call, P, _TS, _Name, _Dict, [{M, F, Args}]})
when length(Args) =:= Arity
andalso M =:= Module
andalso F =:= Function
andalso P =:= Pid
-> Args
end)).
wait_spawn_event_for_pid(ParentPid) ->
wait_events(ets:fun2ms(fun
({spawned, Pid, _TS, _Name, _Dict, [P, _]}) when P =:= ParentPid -> Pid
end)).
wait_spawn_by_anonymous_fun(ParentPid, Name) ->
test_util:wait_other_value(fun() ->
find_spawned_by_anonymous_fun(ParentPid, Name)
end, []).
updater_pid(IndexerPid) ->
{links, Links} = process_info(IndexerPid, links),
[Pid] = select_process_by_name_prefix(Links, "couch_index_updater:init/1"),
Pid.
select_process_by_name_prefix(Pids, Name) ->
lists:filter(fun(Pid) ->
Key = couch_debug:process_name(Pid),
string:str(Key, Name) =:= 1
end, Pids).
select(MatchSpec) ->
lists:filtermap(fun(Event) ->
case ets:test_ms(Event, MatchSpec) of
{ok, false} -> false;
{ok, Result} -> {true, Result};
_ -> false
end
end, tracer_events()).
%% ========================
%% Tracer related functions
%% ------------------------
tracer_new() ->
ets:new(?MODULE, [public, named_table]),
{ok, _Tracer} = dbg:tracer(process, {fun tracer_collector/2, 0}),
ok.
tracer_delete() ->
dbg:stop_clear(),
(catch ets:delete(?MODULE)),
ok.
tracer_record(Pid) ->
{ok, _} = dbg:tp(erlang, put, x),
{ok, _} = dbg:p(Pid, [c, p, sos]),
ok.
tracer_events() ->
Events = [{Idx, E} || [Idx, E] <- ets:match(?MODULE, {{trace, '$1'}, '$2'})],
{_, Sorted} = lists:unzip(lists:keysort(1, Events)),
Sorted.
tracer_collector(Msg, Seq) ->
ets:insert(?MODULE, {{trace, Seq}, normalize_trace_msg(Msg)}),
Seq + 1.
normalize_trace_msg(TraceMsg) ->
case tuple_to_list(TraceMsg) of
[trace_ts, Pid, Type | Info] ->
{TraceInfo, [Timestamp]} = lists:split(length(Info)-1, Info),
{Type, Pid, Timestamp, couch_debug:process_name(Pid), process_info(Pid), TraceInfo};
[trace, Pid, Type | TraceInfo] ->
{Type, Pid, os:timestamp(), couch_debug:process_name(Pid), process_info(Pid), TraceInfo}
end.
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