%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2016. All Rights Reserved.
%%
%% 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.
%%
%% %CopyrightEnd%
%%
%%%-------------------------------------------------------------------
%%% File : scheduler_SUITE.erl
%%% Author : Rickard Green
%%% Description :
%%%
%%% Created : 27 Oct 2008 by Rickard Green
%%%-------------------------------------------------------------------
-module(scheduler_SUITE).
%-define(line_trace, 1).
-include_lib("common_test/include/ct.hrl").
%-compile(export_all).
-export([all/0, suite/0, groups/0,
init_per_suite/1, end_per_suite/1,
init_per_testcase/2, end_per_testcase/2]).
-export([equal/1,
few_low/1,
many_low/1,
equal_with_part_time_high/1,
equal_with_part_time_max/1,
equal_and_high_with_part_time_max/1,
equal_with_high/1,
equal_with_high_max/1,
bound_process/1,
scheduler_bind_types/1,
cpu_topology/1,
update_cpu_info/1,
sct_cmd/1,
sbt_cmd/1,
scheduler_threads/1,
scheduler_suspend_basic/1,
scheduler_suspend/1,
dirty_scheduler_threads/1,
reader_groups/1]).
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap, {minutes, 15}}].
all() ->
[equal, few_low, many_low, equal_with_part_time_high,
equal_with_part_time_max,
equal_and_high_with_part_time_max, equal_with_high,
equal_with_high_max,
bound_process,
{group, scheduler_bind}, scheduler_threads,
scheduler_suspend_basic, scheduler_suspend,
dirty_scheduler_threads,
reader_groups].
groups() ->
[{scheduler_bind, [],
[scheduler_bind_types, cpu_topology, update_cpu_info,
sct_cmd, sbt_cmd]}].
init_per_suite(Config) ->
Config.
end_per_suite(Config) ->
catch erts_debug:set_internal_state(available_internal_state, false),
Config.
init_per_testcase(update_cpu_info, Config) ->
case os:find_executable("taskset") of
false ->
{skip,"Could not find 'taskset' in path"};
_ ->
init_per_tc(update_cpu_info, Config)
end;
init_per_testcase(Case, Config) when is_list(Config) ->
init_per_tc(Case, Config).
init_per_tc(Case, Config) ->
process_flag(priority, max),
erlang:display({'------------', ?MODULE, Case, '------------'}),
OkRes = ok,
[{testcase, Case}, {ok_res, OkRes} |Config].
end_per_testcase(_Case, Config) when is_list(Config) ->
ok.
-define(ERTS_RUNQ_CHECK_BALANCE_REDS_PER_SCHED, (2000*2000)).
-define(DEFAULT_TEST_REDS_PER_SCHED, 200000000).
%%
%% Test cases
%%
equal(Config) when is_list(Config) ->
low_normal_test(Config, 500, 500).
few_low(Config) when is_list(Config) ->
low_normal_test(Config, 1000, 2*active_schedulers()).
many_low(Config) when is_list(Config) ->
low_normal_test(Config, 2*active_schedulers(), 1000).
low_normal_test(Config, NW, LW) ->
Tracer = start_tracer(),
Low = workers(LW, low),
Normal = workers(NW, normal),
Res = do_it(Tracer, Low, Normal, [], []),
chk_result(Res, LW, NW, 0, 0, true, false, false),
workers_exit([Low, Normal]),
ok(Res, Config).
equal_with_part_time_high(Config) when is_list(Config) ->
NW = 500,
LW = 500,
HW = 1,
Tracer = start_tracer(),
Normal = workers(NW, normal),
Low = workers(LW, low),
High = part_time_workers(HW, high),
Res = do_it(Tracer, Low, Normal, High, []),
chk_result(Res, LW, NW, HW, 0, true, true, false),
workers_exit([Low, Normal, High]),
ok(Res, Config).
equal_and_high_with_part_time_max(Config) when is_list(Config) ->
NW = 500,
LW = 500,
HW = 500,
MW = 1,
Tracer = start_tracer(),
Low = workers(LW, low),
Normal = workers(NW, normal),
High = workers(HW, high),
Max = part_time_workers(MW, max),
Res = do_it(Tracer, Low, Normal, High, Max),
chk_result(Res, LW, NW, HW, MW, false, true, true),
workers_exit([Low, Normal, Max]),
ok(Res, Config).
equal_with_part_time_max(Config) when is_list(Config) ->
NW = 500,
LW = 500,
MW = 1,
Tracer = start_tracer(),
Low = workers(LW, low),
Normal = workers(NW, normal),
Max = part_time_workers(MW, max),
Res = do_it(Tracer, Low, Normal, [], Max),
chk_result(Res, LW, NW, 0, MW, true, false, true),
workers_exit([Low, Normal, Max]),
ok(Res, Config).
equal_with_high(Config) when is_list(Config) ->
NW = 500,
LW = 500,
HW = 1,
Tracer = start_tracer(),
Low = workers(LW, low),
Normal = workers(NW, normal),
High = workers(HW, high),
Res = do_it(Tracer, Low, Normal, High, []),
LNExe = case active_schedulers() of
S when S =< HW -> false;
_ -> true
end,
chk_result(Res, LW, NW, HW, 0, LNExe, true, false),
workers_exit([Low, Normal, High]),
ok(Res, Config).
equal_with_high_max(Config) when is_list(Config) ->
NW = 500,
LW = 500,
HW = 1,
MW = 1,
Tracer = start_tracer(),
Normal = workers(NW, normal),
Low = workers(LW, low),
High = workers(HW, high),
Max = workers(MW, max),
Res = do_it(Tracer, Low, Normal, High, Max),
{LNExe, HExe} = case active_schedulers() of
S when S =< MW -> {false, false};
S when S =< (MW + HW) -> {false, true};
_ -> {true, true}
end,
chk_result(Res, LW, NW, HW, MW, LNExe, HExe, true),
workers_exit([Low, Normal, Max]),
ok(Res, Config).
bound_process(Config) when is_list(Config) ->
case erlang:system_info(run_queues) == erlang:system_info(schedulers) of
true ->
NStartBase = 20000,
NStart = case {erlang:system_info(debug_compiled),
erlang:system_info(lock_checking)} of
{true, true} -> NStartBase div 100;
{_, true} -> NStartBase div 10;
_ -> NStartBase
end,
MStart = 100,
Seq = lists:seq(1, 100),
Tester = self(),
Procs = lists:map(
fun (N) when N rem 2 == 0 ->
spawn_opt(fun () ->
bound_loop(NStart,
NStart,
MStart,
1),
Tester ! {self(), done}
end,
[{scheduler, 1}, link]);
(_N) ->
spawn_link(fun () ->
bound_loop(NStart,
NStart,
MStart,
false),
Tester ! {self(), done}
end)
end,
Seq),
lists:foreach(fun (P) -> receive {P, done} -> ok end end,
Procs),
ok;
false ->
{skipped, "Functionality not supported"}
end.
bound_loop(_, 0, 0, _) ->
ok;
bound_loop(NS, 0, M, false) ->
bound_loop(NS, NS, M-1, false);
bound_loop(NS, N, M, false) ->
erlang:system_info(scheduler_id),
bound_loop(NS, N-1, M, false);
bound_loop(NS, 0, M, Sched) ->
NewSched = (Sched rem erlang:system_info(schedulers_online)) + 1,
Sched = process_flag(scheduler, NewSched),
NewSched = erlang:system_info(scheduler_id),
bound_loop(NS, NS, M-1, NewSched);
bound_loop(NS, N, M, Sched) ->
Sched = erlang:system_info(scheduler_id),
bound_loop(NS, N-1, M, Sched).
-define(TOPOLOGY_A_CMD,
"+sct"
"L0-1t0-1c0p0n0"
":L2-3t0-1c1p0n0"
":L4-5t0-1c0p1n0"
":L6-7t0-1c1p1n0"
":L8-9t0-1c0p2n1"
":L10-11t0-1c1p2n1"
":L12-13t0-1c0p3n1"
":L14-15t0-1c1p3n1").
-define(TOPOLOGY_A_TERM,
[{node,[{processor,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]}]},
{processor,[{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]}]},
{node,[{processor,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]}]},
{processor,[{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]}]}]).
-define(TOPOLOGY_B_CMD,
"+sct"
"L0-1t0-1c0n0p0"
":L2-3t0-1c1n0p0"
":L4-5t0-1c2n1p0"
":L6-7t0-1c3n1p0"
":L8-9t0-1c0n2p1"
":L10-11t0-1c1n2p1"
":L12-13t0-1c2n3p1"
":L14-15t0-1c3n3p1").
-define(TOPOLOGY_B_TERM,
[{processor,[{node,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]}]},
{node,[{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]}]},
{processor,[{node,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]}]},
{node,[{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]}]}]).
-define(TOPOLOGY_C_TERM,
[{node,[{processor,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]}]},
{processor,[{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]}]},
{processor,[{node,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]}]},
{node,[{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]}]},
{node,[{processor,[{core,[{thread,{logical,16}},
{thread,{logical,17}}]},
{core,[{thread,{logical,18}},
{thread,{logical,19}}]}]},
{processor,[{core,[{thread,{logical,20}},
{thread,{logical,21}}]},
{core,[{thread,{logical,22}},
{thread,{logical,23}}]}]}]},
{processor,[{node,[{core,[{thread,{logical,24}},
{thread,{logical,25}}]},
{core,[{thread,{logical,26}},
{thread,{logical,27}}]}]},
{node,[{core,[{thread,{logical,28}},
{thread,{logical,29}}]},
{core,[{thread,{logical,30}},
{thread,{logical,31}}]}]}]}]).
-define(TOPOLOGY_C_CMD,
"+sct"
"L0-1t0-1c0p0n0"
":L2-3t0-1c1p0n0"
":L4-5t0-1c0p1n0"
":L6-7t0-1c1p1n0"
":L8-9t0-1c0n1p2"
":L10-11t0-1c1n1p2"
":L12-13t0-1c2n2p2"
":L14-15t0-1c3n2p2"
":L16-17t0-1c0p3n3"
":L18-19t0-1c1p3n3"
":L20-21t0-1c0p4n3"
":L22-23t0-1c1p4n3"
":L24-25t0-1c0n4p5"
":L26-27t0-1c1n4p5"
":L28-29t0-1c2n5p5"
":L30-31t0-1c3n5p5").
-define(TOPOLOGY_D_TERM,
[{processor,[{node,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]}]},
{node,[{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]}]},
{node,[{processor,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]}]},
{processor,[{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]}]},
{processor,[{node,[{core,[{thread,{logical,16}},
{thread,{logical,17}}]},
{core,[{thread,{logical,18}},
{thread,{logical,19}}]}]},
{node,[{core,[{thread,{logical,20}},
{thread,{logical,21}}]},
{core,[{thread,{logical,22}},
{thread,{logical,23}}]}]}]},
{node,[{processor,[{core,[{thread,{logical,24}},
{thread,{logical,25}}]},
{core,[{thread,{logical,26}},
{thread,{logical,27}}]}]},
{processor,[{core,[{thread,{logical,28}},
{thread,{logical,29}}]},
{core,[{thread,{logical,30}},
{thread,{logical,31}}]}]}]}]).
-define(TOPOLOGY_D_CMD,
"+sct"
"L0-1t0-1c0n0p0"
":L2-3t0-1c1n0p0"
":L4-5t0-1c2n1p0"
":L6-7t0-1c3n1p0"
":L8-9t0-1c0p1n2"
":L10-11t0-1c1p1n2"
":L12-13t0-1c0p2n2"
":L14-15t0-1c1p2n2"
":L16-17t0-1c0n3p3"
":L18-19t0-1c1n3p3"
":L20-21t0-1c2n4p3"
":L22-23t0-1c3n4p3"
":L24-25t0-1c0p4n5"
":L26-27t0-1c1p4n5"
":L28-29t0-1c0p5n5"
":L30-31t0-1c1p5n5").
-define(TOPOLOGY_E_CMD,
"+sct"
"L0-1t0-1c0p0n0"
":L2-3t0-1c1p0n0"
":L4-5t0-1c2p0n0"
":L6-7t0-1c3p0n0"
":L8-9t0-1c0p1n1"
":L10-11t0-1c1p1n1"
":L12-13t0-1c2p1n1"
":L14-15t0-1c3p1n1").
-define(TOPOLOGY_E_TERM,
[{node,[{processor,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]},
{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]}]},
{node,[{processor,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]},
{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]}]}]).
-define(TOPOLOGY_F_CMD,
"+sct"
"L0-1t0-1c0n0p0"
":L2-3t0-1c1n0p0"
":L4-5t0-1c2n0p0"
":L6-7t0-1c3n0p0"
":L8-9t0-1c4n1p0"
":L10-11t0-1c5n1p0"
":L12-13t0-1c6n1p0"
":L14-15t0-1c7n1p0"
":L16-17t0-1c8n2p0"
":L18-19t0-1c9n2p0"
":L20-21t0-1c10n2p0"
":L22-23t0-1c11n2p0"
":L24-25t0-1c12n3p0"
":L26-27t0-1c13n3p0"
":L28-29t0-1c14n3p0"
":L30-31t0-1c15n3p0").
-define(TOPOLOGY_F_TERM,
[{processor,[{node,[{core,[{thread,{logical,0}},
{thread,{logical,1}}]},
{core,[{thread,{logical,2}},
{thread,{logical,3}}]},
{core,[{thread,{logical,4}},
{thread,{logical,5}}]},
{core,[{thread,{logical,6}},
{thread,{logical,7}}]}]},
{node,[{core,[{thread,{logical,8}},
{thread,{logical,9}}]},
{core,[{thread,{logical,10}},
{thread,{logical,11}}]},
{core,[{thread,{logical,12}},
{thread,{logical,13}}]},
{core,[{thread,{logical,14}},
{thread,{logical,15}}]}]},
{node,[{core,[{thread,{logical,16}},
{thread,{logical,17}}]},
{core,[{thread,{logical,18}},
{thread,{logical,19}}]},
{core,[{thread,{logical,20}},
{thread,{logical,21}}]},
{core,[{thread,{logical,22}},
{thread,{logical,23}}]}]},
{node,[{core,[{thread,{logical,24}},
{thread,{logical,25}}]},
{core,[{thread,{logical,26}},
{thread,{logical,27}}]},
{core,[{thread,{logical,28}},
{thread,{logical,29}}]},
{core,[{thread,{logical,30}},
{thread,{logical,31}}]}]}]}]).
bindings(Node, BindType) ->
Parent = self(),
Ref = make_ref(),
Pid = spawn_link(Node,
fun () ->
enable_internal_state(),
Res = (catch erts_debug:get_internal_state(
{fake_scheduler_bindings,
BindType})),
Parent ! {Ref, Res}
end),
receive
{Ref, Res} ->
io:format("~p: ~p~n", [BindType, Res]),
unlink(Pid),
Res
end.
scheduler_bind_types(Config) when is_list(Config) ->
OldRelFlags = clear_erl_rel_flags(),
try
scheduler_bind_types_test(Config,
?TOPOLOGY_A_TERM,
?TOPOLOGY_A_CMD,
a),
scheduler_bind_types_test(Config,
?TOPOLOGY_B_TERM,
?TOPOLOGY_B_CMD,
b),
scheduler_bind_types_test(Config,
?TOPOLOGY_C_TERM,
?TOPOLOGY_C_CMD,
c),
scheduler_bind_types_test(Config,
?TOPOLOGY_D_TERM,
?TOPOLOGY_D_CMD,
d),
scheduler_bind_types_test(Config,
?TOPOLOGY_E_TERM,
?TOPOLOGY_E_CMD,
e),
scheduler_bind_types_test(Config,
?TOPOLOGY_F_TERM,
?TOPOLOGY_F_CMD,
f)
after
restore_erl_rel_flags(OldRelFlags)
end,
ok.
scheduler_bind_types_test(Config, Topology, CmdLine, TermLetter) ->
io:format("Testing (~p): ~p~n", [TermLetter, Topology]),
{ok, Node0} = start_node(Config),
_ = rpc:call(Node0, erlang, system_flag, [cpu_topology, Topology]),
cmp(Topology, rpc:call(Node0, erlang, system_info, [cpu_topology])),
check_bind_types(Node0, TermLetter),
stop_node(Node0),
{ok, Node1} = start_node(Config, CmdLine),
cmp(Topology, rpc:call(Node1, erlang, system_info, [cpu_topology])),
check_bind_types(Node1, TermLetter),
stop_node(Node1).
check_bind_types(Node, a) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
= bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, thread_spread),
{0,4,8,12,2,6,10,14,1,5,9,13,3,7,11,15}
= bindings(Node, processor_spread),
{0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15}
= bindings(Node, spread),
{0,2,4,6,1,3,5,7,8,10,12,14,9,11,13,15}
= bindings(Node, no_node_thread_spread),
{0,4,2,6,1,5,3,7,8,12,10,14,9,13,11,15}
= bindings(Node, no_node_processor_spread),
{0,4,2,6,8,12,10,14,1,5,3,7,9,13,11,15}
= bindings(Node, thread_no_node_processor_spread),
{0,4,2,6,8,12,10,14,1,5,3,7,9,13,11,15}
= bindings(Node, default_bind),
ok;
check_bind_types(Node, b) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
= bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, thread_spread),
{0,8,2,10,4,12,6,14,1,9,3,11,5,13,7,15}
= bindings(Node, processor_spread),
{0,8,4,12,2,10,6,14,1,9,5,13,3,11,7,15}
= bindings(Node, spread),
{0,2,1,3,4,6,5,7,8,10,9,11,12,14,13,15}
= bindings(Node, no_node_thread_spread),
{0,2,1,3,4,6,5,7,8,10,9,11,12,14,13,15}
= bindings(Node, no_node_processor_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, thread_no_node_processor_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, default_bind),
ok;
check_bind_types(Node, c) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
25,26,27,28,29,30,31} = bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,15,
17,19,21,23,25,27,29,31} = bindings(Node, thread_spread),
{0,4,8,16,20,24,2,6,10,18,22,26,12,28,14,30,1,5,9,17,21,25,
3,7,11,19,23,27,13,29,15,31} = bindings(Node, processor_spread),
{0,8,16,24,4,20,12,28,2,10,18,26,6,22,14,30,1,9,17,25,5,21,13,29,3,11,
19,27,7,23,15,31} = bindings(Node, spread),
{0,2,4,6,1,3,5,7,8,10,9,11,12,14,13,15,16,18,20,22,17,19,21,23,24,26,
25,27,28,30,29,31} = bindings(Node, no_node_thread_spread),
{0,4,2,6,1,5,3,7,8,10,9,11,12,14,13,15,16,20,18,22,17,21,19,23,24,26,
25,27,28,30,29,31} = bindings(Node, no_node_processor_spread),
{0,4,2,6,8,10,12,14,16,20,18,22,24,26,28,30,1,5,3,7,9,11,13,15,17,21,
19,23,25,27,29,31} = bindings(Node, thread_no_node_processor_spread),
{0,4,2,6,8,10,12,14,16,20,18,22,24,26,28,30,1,5,3,7,9,11,13,15,17,21,
19,23,25,27,29,31} = bindings(Node, default_bind),
ok;
check_bind_types(Node, d) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
25,26,27,28,29,30,31} = bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,15,
17,19,21,23,25,27,29,31} = bindings(Node, thread_spread),
{0,8,12,16,24,28,2,10,14,18,26,30,4,20,6,22,1,9,13,17,25,29,3,11,15,
19,27,31,5,21,7,23} = bindings(Node, processor_spread),
{0,8,16,24,12,28,4,20,2,10,18,26,14,30,6,22,1,9,17,25,13,29,5,21,3,11,
19,27,15,31,7,23} = bindings(Node, spread),
{0,2,1,3,4,6,5,7,8,10,12,14,9,11,13,15,16,18,17,19,20,22,21,23,24,26,
28,30,25,27,29,31} = bindings(Node, no_node_thread_spread),
{0,2,1,3,4,6,5,7,8,12,10,14,9,13,11,15,16,18,17,19,20,22,21,23,24,28,
26,30,25,29,27,31} = bindings(Node, no_node_processor_spread),
{0,2,4,6,8,12,10,14,16,18,20,22,24,28,26,30,1,3,5,7,9,13,11,15,17,19,
21,23,25,29,27,31} = bindings(Node, thread_no_node_processor_spread),
{0,2,4,6,8,12,10,14,16,18,20,22,24,28,26,30,1,3,5,7,9,13,11,15,17,19,
21,23,25,29,27,31} = bindings(Node, default_bind),
ok;
check_bind_types(Node, e) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
= bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, thread_spread),
{0,8,2,10,4,12,6,14,1,9,3,11,5,13,7,15}
= bindings(Node, processor_spread),
{0,8,2,10,4,12,6,14,1,9,3,11,5,13,7,15}
= bindings(Node, spread),
{0,2,4,6,1,3,5,7,8,10,12,14,9,11,13,15}
= bindings(Node, no_node_thread_spread),
{0,2,4,6,1,3,5,7,8,10,12,14,9,11,13,15}
= bindings(Node, no_node_processor_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, thread_no_node_processor_spread),
{0,2,4,6,8,10,12,14,1,3,5,7,9,11,13,15}
= bindings(Node, default_bind),
ok;
check_bind_types(Node, f) ->
{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
25,26,27,28,29,30,31} = bindings(Node, no_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,15,
17,19,21,23,25,27,29,31} = bindings(Node, thread_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,
15,17,19,21,23,25,27,29,31} = bindings(Node, processor_spread),
{0,8,16,24,2,10,18,26,4,12,20,28,6,14,22,30,1,9,17,25,3,11,19,27,5,13,
21,29,7,15,23,31} = bindings(Node, spread),
{0,2,4,6,1,3,5,7,8,10,12,14,9,11,13,15,16,18,20,22,17,19,21,23,24,26,
28,30,25,27,29,31} = bindings(Node, no_node_thread_spread),
{0,2,4,6,1,3,5,7,8,10,12,14,9,11,13,15,16,18,20,22,17,19,21,23,24,26,
28,30,25,27,29,31} = bindings(Node, no_node_processor_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,15,17,19,
21,23,25,27,29,31} = bindings(Node, thread_no_node_processor_spread),
{0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,1,3,5,7,9,11,13,15,17,19,
21,23,25,27,29,31} = bindings(Node, default_bind),
ok;
check_bind_types(Node, _) ->
bindings(Node, no_spread),
bindings(Node, thread_spread),
bindings(Node, processor_spread),
bindings(Node, spread),
bindings(Node, no_node_thread_spread),
bindings(Node, no_node_processor_spread),
bindings(Node, thread_no_node_processor_spread),
bindings(Node, default_bind),
ok.
cpu_topology(Config) when is_list(Config) ->
OldRelFlags = clear_erl_rel_flags(),
try
cpu_topology_test(
Config,
[{node,[{processor,[{core,{logical,0}},
{core,{logical,1}}]}]},
{processor,[{node,[{core,{logical,2}},
{core,{logical,3}}]}]},
{node,[{processor,[{core,{logical,4}},
{core,{logical,5}}]}]},
{processor,[{node,[{core,{logical,6}},
{core,{logical,7}}]}]}],
"+sct "
"L0-1c0-1p0n0"
":L2-3c0-1n1p1"
":L4-5c0-1p2n2"
":L6-7c0-1n3p3"),
cpu_topology_test(
Config,
[{node,[{processor,[{core,{logical,0}},
{core,{logical,1}}]},
{processor,[{core,{logical,2}},
{core,{logical,3}}]}]},
{processor,[{node,[{core,{logical,4}},
{core,{logical,5}}]},
{node,[{core,{logical,6}},
{core,{logical,7}}]}]},
{node,[{processor,[{core,{logical,8}},
{core,{logical,9}}]},
{processor,[{core,{logical,10}},
{core,{logical,11}}]}]},
{processor,[{node,[{core,{logical,12}},
{core,{logical,13}}]},
{node,[{core,{logical,14}},
{core,{logical,15}}]}]}],
"+sct "
"L0-1c0-1p0n0"
":L2-3c0-1p1n0"
":L4-5c0-1n1p2"
":L6-7c2-3n2p2"
":L8-9c0-1p3n3"
":L10-11c0-1p4n3"
":L12-13c0-1n4p5"
":L14-15c2-3n5p5"),
cpu_topology_test(
Config,
[{node,[{processor,[{core,{logical,0}},
{core,{logical,1}}]}]},
{processor,[{node,[{core,{logical,2}},
{core,{logical,3}}]}]},
{processor,[{node,[{core,{logical,4}},
{core,{logical,5}}]}]},
{node,[{processor,[{core,{logical,6}},
{core,{logical,7}}]}]},
{node,[{processor,[{core,{logical,8}},
{core,{logical,9}}]}]},
{processor,[{node,[{core,{logical,10}},
{core,{logical,11}}]}]}],
"+sct "
"L0-1c0-1p0n0"
":L2-3c0-1n1p1"
":L4-5c0-1n2p2"
":L6-7c0-1p3n3"
":L8-9c0-1p4n4"
":L10-11c0-1n5p5")
after
restore_erl_rel_flags(OldRelFlags)
end,
ok.
cpu_topology_test(Config, Topology, Cmd) ->
io:format("Testing~n ~p~n ~p~n", [Topology, Cmd]),
cpu_topology_bif_test(Config, Topology),
cpu_topology_cmdline_test(Config, Topology, Cmd),
ok.
cpu_topology_bif_test(_Config, false) ->
ok;
cpu_topology_bif_test(Config, Topology) ->
{ok, Node} = start_node(Config),
_ = rpc:call(Node, erlang, system_flag, [cpu_topology, Topology]),
cmp(Topology, rpc:call(Node, erlang, system_info, [cpu_topology])),
stop_node(Node),
ok.
cpu_topology_cmdline_test(_Config, _Topology, false) ->
ok;
cpu_topology_cmdline_test(Config, Topology, Cmd) ->
{ok, Node} = start_node(Config, Cmd),
cmp(Topology, rpc:call(Node, erlang, system_info, [cpu_topology])),
stop_node(Node),
ok.
update_cpu_info(Config) when is_list(Config) ->
OldOnline = erlang:system_info(schedulers_online),
OldAff = get_affinity_mask(),
io:format("START - Affinity mask: ~p - Schedulers online: ~p - Scheduler bindings: ~p~n",
[OldAff, OldOnline, erlang:system_info(scheduler_bindings)]),
case {erlang:system_info(logical_processors_available), OldAff} of
{Avail, _} when Avail == unknown; OldAff == unknown; OldAff == 1 ->
%% Nothing much to test; just a smoke test
case erlang:system_info(update_cpu_info) of
unchanged -> ok;
changed -> ok
end;
{Avail, _} ->
try
adjust_schedulers_online(),
case erlang:system_info(schedulers_online) of
1 ->
%% Nothing much to test; just a smoke test
ok;
Onln0 ->
Cpus = bits_in_mask(OldAff),
RmCpus = case Cpus > Onln0 of
true -> Cpus - Onln0 + 1;
false -> Onln0 - Cpus + 1
end,
Onln1 = Cpus - RmCpus,
case Onln1 > 0 of
false ->
%% Nothing much to test; just a smoke test
ok;
true ->
Aff = restrict_affinity_mask(OldAff, RmCpus),
set_affinity_mask(Aff),
case adjust_schedulers_online() of
{Onln0, Onln1} ->
Onln1 = erlang:system_info(schedulers_online),
receive after 500 -> ok end,
io:format("TEST - Affinity mask: ~p - Schedulers online: ~p - Scheduler bindings: ~p~n",
[Aff, Onln1, erlang:system_info(scheduler_bindings)]),
unchanged = adjust_schedulers_online(),
ok;
Fail ->
ct:fail(Fail)
end
end
end
after
set_affinity_mask(OldAff),
adjust_schedulers_online(),
erlang:system_flag(schedulers_online, OldOnline),
receive after 500 -> ok end,
io:format("END - Affinity mask: ~p - Schedulers online: ~p - Scheduler bindings: ~p~n",
[get_affinity_mask(),
erlang:system_info(schedulers_online),
erlang:system_info(scheduler_bindings)])
end
end.
bits_in_mask(Mask) ->
bits_in_mask(Mask, 0, 0).
bits_in_mask(0, Shift, N) ->
N;
bits_in_mask(Mask, Shift, N) ->
case Mask band (1 bsl Shift) of
0 -> bits_in_mask(Mask, Shift+1, N);
_ -> bits_in_mask(Mask band (bnot (1 bsl Shift)),
Shift+1, N+1)
end.
restrict_affinity_mask(Mask, N) ->
try
restrict_affinity_mask(Mask, 0, N)
catch
throw : Reason ->
exit({Reason, Mask, N})
end.
restrict_affinity_mask(Mask, _Shift, 0) ->
Mask;
restrict_affinity_mask(0, _Shift, _N) ->
throw(overresticted_affinity_mask);
restrict_affinity_mask(Mask, Shift, N) ->
case Mask band (1 bsl Shift) of
0 -> restrict_affinity_mask(Mask, Shift+1, N);
_ -> restrict_affinity_mask(Mask band (bnot (1 bsl Shift)),
Shift+1, N-1)
end.
adjust_schedulers_online() ->
case erlang:system_info(update_cpu_info) of
unchanged ->
unchanged;
changed ->
Avail = erlang:system_info(logical_processors_available),
Scheds = erlang:system_info(schedulers),
SOnln = case Avail > Scheds of
true -> Scheds;
false -> Avail
end,
{erlang:system_flag(schedulers_online, SOnln), SOnln}
end.
read_affinity(Data) ->
Exp = "pid " ++ os:getpid() ++ "'s current affinity mask",
case string:tokens(Data, ":") of
[Exp, DirtyAffinityStr] ->
AffinityStr = string:strip(string:strip(DirtyAffinityStr,
both, $ ),
both, $\n),
case catch erlang:list_to_integer(AffinityStr, 16) of
Affinity when is_integer(Affinity) ->
Affinity;
_ ->
bad
end;
_ ->
bad
end.
get_affinity_mask(Port, Status, Affinity) when Status == unknown;
Affinity == unknown ->
receive
{Port,{data, Data}} ->
get_affinity_mask(Port, Status, read_affinity(Data));
{Port,{exit_status,S}} ->
get_affinity_mask(Port, S, Affinity)
end;
get_affinity_mask(_Port, _Status, bad) ->
unknown;
get_affinity_mask(_Port, _Status, Affinity) ->
Affinity.
get_affinity_mask() ->
case os:type() of
{unix, linux} ->
case catch open_port({spawn, "taskset -p " ++ os:getpid()},
[exit_status]) of
Port when is_port(Port) ->
get_affinity_mask(Port, unknown, unknown);
_ ->
unknown
end;
_ ->
unknown
end.
set_affinity_mask(Port, unknown) ->
receive
{Port,{data, _}} ->
set_affinity_mask(Port, unknown);
{Port,{exit_status,Status}} ->
set_affinity_mask(Port, Status)
end;
set_affinity_mask(Port, Status) ->
receive
{Port,{data, _}} ->
set_affinity_mask(Port, unknown)
after 0 ->
Status
end.
set_affinity_mask(Mask) ->
Cmd = lists:flatten(["taskset -p ",
io_lib:format("~.16b", [Mask]),
" ",
os:getpid()]),
case catch open_port({spawn, Cmd}, [exit_status]) of
Port when is_port(Port) ->
case set_affinity_mask(Port, unknown) of
0 -> ok;
_ -> exit(failed_to_set_affinity)
end;
_ ->
exit(failed_to_set_affinity)
end.
sct_cmd(Config) when is_list(Config) ->
Topology = ?TOPOLOGY_A_TERM,
OldRelFlags = clear_erl_rel_flags(),
try
{ok, Node} = start_node(Config, ?TOPOLOGY_A_CMD),
cmp(Topology,
rpc:call(Node, erlang, system_info, [cpu_topology])),
cmp(Topology,
rpc:call(Node, erlang, system_flag, [cpu_topology, Topology])),
cmp(Topology,
rpc:call(Node, erlang, system_info, [cpu_topology])),
stop_node(Node)
after
restore_erl_rel_flags(OldRelFlags)
end,
ok.
-define(BIND_TYPES,
[{"u", unbound},
{"ns", no_spread},
{"ts", thread_spread},
{"ps", processor_spread},
{"s", spread},
{"nnts", no_node_thread_spread},
{"nnps", no_node_processor_spread},
{"tnnps", thread_no_node_processor_spread},
{"db", thread_no_node_processor_spread}]).
sbt_cmd(Config) when is_list(Config) ->
Bind = try
OldVal = erlang:system_flag(scheduler_bind_type, default_bind),
erlang:system_flag(scheduler_bind_type, OldVal),
go_for_it
catch
error:notsup -> notsup;
error:_ -> go_for_it
end,
case Bind of
notsup ->
{skipped, "Binding of schedulers not supported"};
go_for_it ->
CpuTCmd = case erlang:system_info({cpu_topology,detected}) of
undefined ->
case os:type() of
linux ->
case erlang:system_info(logical_processors) of
1 ->
"+sctL0";
N when is_integer(N) ->
NS = integer_to_list(N-1),
"+sctL0-"++NS++"p0-"++NS;
_ ->
false
end;
_ ->
false
end;
_ ->
""
end,
case CpuTCmd of
false ->
{skipped, "Don't know how to create cpu topology"};
_ ->
case erlang:system_info(logical_processors) of
LP when is_integer(LP) ->
OldRelFlags = clear_erl_rel_flags(),
try
lists:foreach(fun ({ClBt, Bt}) ->
sbt_test(Config,
CpuTCmd,
ClBt,
Bt,
LP)
end,
?BIND_TYPES)
after
restore_erl_rel_flags(OldRelFlags)
end,
ok;
_ ->
{skipped,
"Don't know the amount of logical processors"}
end
end
end.
sbt_test(Config, CpuTCmd, ClBt, Bt, LP) ->
io:format("Testing +sbt ~s (~p)~n", [ClBt, Bt]),
LPS = integer_to_list(LP),
Cmd = CpuTCmd++" +sbt "++ClBt++" +S"++LPS++":"++LPS,
{ok, Node} = start_node(Config, Cmd),
Bt = rpc:call(Node,
erlang,
system_info,
[scheduler_bind_type]),
SB = rpc:call(Node,
erlang,
system_info,
[scheduler_bindings]),
io:format("scheduler bindings: ~p~n", [SB]),
BS = case {Bt, erlang:system_info(logical_processors_available)} of
{unbound, _} -> 0;
{_, Int} when is_integer(Int) -> Int;
{_, _} -> LP
end,
lists:foldl(fun (S, 0) ->
unbound = S,
0;
(S, N) ->
true = is_integer(S),
N-1
end,
BS,
tuple_to_list(SB)),
stop_node(Node),
ok.
scheduler_threads(Config) when is_list(Config) ->
SmpSupport = erlang:system_info(smp_support),
{Sched, SchedOnln, _} = get_sstate(Config, ""),
%% Configure half the number of both the scheduler threads and
%% the scheduler threads online.
{HalfSched, HalfSchedOnln} = case SmpSupport of
false -> {1,1};
true ->
{Sched div 2,
SchedOnln div 2}
end,
{HalfSched, HalfSchedOnln, _} = get_sstate(Config, "+SP 50:50"),
%% Use +S to configure 4x the number of scheduler threads and
%% 4x the number of scheduler threads online, but alter that
%% setting using +SP to 50% scheduler threads and 25% scheduler
%% threads online. The result should be 2x scheduler threads and
%% 1x scheduler threads online.
TwiceSched = case SmpSupport of
false -> 1;
true -> Sched*2
end,
FourSched = integer_to_list(Sched*4),
FourSchedOnln = integer_to_list(SchedOnln*4),
CombinedCmd1 = "+S "++FourSched++":"++FourSchedOnln++" +SP50:25",
{TwiceSched, SchedOnln, _} = get_sstate(Config, CombinedCmd1),
%% Now do the same test but with the +S and +SP options in the
%% opposite order, since order shouldn't matter.
CombinedCmd2 = "+SP50:25 +S "++FourSched++":"++FourSchedOnln,
{TwiceSched, SchedOnln, _} = get_sstate(Config, CombinedCmd2),
%% Apply two +SP options to make sure the second overrides the first
TwoCmd = "+SP 25:25 +SP 100:100",
{Sched, SchedOnln, _} = get_sstate(Config, TwoCmd),
%% Configure 50% of scheduler threads online only
{Sched, HalfSchedOnln, _} = get_sstate(Config, "+SP:50"),
%% Configure 2x scheduler threads only
{TwiceSched, SchedOnln, _} = get_sstate(Config, "+SP 200"),
case {erlang:system_info(logical_processors),
erlang:system_info(logical_processors_available)} of
{LProc, LProcAvail} when is_integer(LProc), is_integer(LProcAvail) ->
%% Test resetting the scheduler counts
ResetCmd = "+S "++FourSched++":"++FourSchedOnln++" +S 0:0",
{LProc, LProcAvail, _} = get_sstate(Config, ResetCmd),
%% Test negative +S settings, but only for SMP-enabled emulators
case {SmpSupport, LProc > 1, LProcAvail > 1} of
{true, true, true} ->
SchedMinus1 = LProc-1,
SchedOnlnMinus1 = LProcAvail-1,
{SchedMinus1, SchedOnlnMinus1, _} = get_sstate(Config, "+S -1"),
{LProc, SchedOnlnMinus1, _} = get_sstate(Config, "+S :-1"),
{SchedMinus1, SchedOnlnMinus1, _} = get_sstate(Config, "+S -1:-1"),
ok;
_ ->
{comment, "Skipped reduced amount of schedulers test due to too few logical processors"}
end;
_ -> %% Skipped when missing info about logical processors...
{comment, "Skipped reset amount of schedulers test, and reduced amount of schedulers test due to too unknown amount of logical processors"}
end.
dirty_scheduler_threads(Config) when is_list(Config) ->
case erlang:system_info(dirty_cpu_schedulers) of
0 -> {skipped, "No dirty scheduler support"};
_ -> dirty_scheduler_threads_test(Config)
end.
dirty_scheduler_threads_test(Config) ->
SmpSupport = erlang:system_info(smp_support),
{Sched, SchedOnln, _} = get_dsstate(Config, ""),
{HalfSched, HalfSchedOnln} = case SmpSupport of
false -> {1,1};
true ->
{Sched div 2,
SchedOnln div 2}
end,
Cmd1 = "+SDcpu "++integer_to_list(HalfSched)++":"++
integer_to_list(HalfSchedOnln),
{HalfSched, HalfSchedOnln, _} = get_dsstate(Config, Cmd1),
{HalfSched, HalfSchedOnln, _} = get_dsstate(Config, "+SDPcpu 50:50"),
IOSched = 20,
{_, _, IOSched} = get_dsstate(Config, "+SDio "++integer_to_list(IOSched)),
{ok, Node} = start_node(Config, ""),
[ok] = mcall(Node, [fun() -> dirty_schedulers_online_test() end]),
ok.
dirty_schedulers_online_test() ->
dirty_schedulers_online_test(erlang:system_info(smp_support)).
dirty_schedulers_online_test(false) -> ok;
dirty_schedulers_online_test(true) ->
dirty_schedulers_online_smp_test(erlang:system_info(schedulers_online)).
dirty_schedulers_online_smp_test(SchedOnln) when SchedOnln < 4 -> ok;
dirty_schedulers_online_smp_test(SchedOnln) ->
receive after 500 -> ok end,
DirtyCPUSchedOnln = erlang:system_info(dirty_cpu_schedulers_online),
SchedOnln = DirtyCPUSchedOnln,
HalfSchedOnln = SchedOnln div 2,
SchedOnln = erlang:system_flag(schedulers_online, HalfSchedOnln),
HalfDirtyCPUSchedOnln = DirtyCPUSchedOnln div 2,
HalfDirtyCPUSchedOnln = erlang:system_flag(schedulers_online, SchedOnln),
DirtyCPUSchedOnln = erlang:system_flag(dirty_cpu_schedulers_online,
HalfDirtyCPUSchedOnln),
receive after 500 -> ok end,
HalfDirtyCPUSchedOnln = erlang:system_info(dirty_cpu_schedulers_online),
QrtrDirtyCPUSchedOnln = HalfDirtyCPUSchedOnln div 2,
SchedOnln = erlang:system_flag(schedulers_online, HalfSchedOnln),
receive after 500 -> ok end,
QrtrDirtyCPUSchedOnln = erlang:system_info(dirty_cpu_schedulers_online),
ok.
get_sstate(Config, Cmd) ->
{ok, Node} = start_node(Config, Cmd),
[SState] = mcall(Node, [fun () ->
erlang:system_info(schedulers_state)
end]),
stop_node(Node),
SState.
get_dsstate(Config, Cmd) ->
{ok, Node} = start_node(Config, Cmd),
[DSCPU] = mcall(Node, [fun () ->
erlang:system_info(dirty_cpu_schedulers)
end]),
[DSCPUOnln] = mcall(Node, [fun () ->
erlang:system_info(dirty_cpu_schedulers_online)
end]),
[DSIO] = mcall(Node, [fun () ->
erlang:system_info(dirty_io_schedulers)
end]),
stop_node(Node),
{DSCPU, DSCPUOnln, DSIO}.
scheduler_suspend_basic(Config) when is_list(Config) ->
case erlang:system_info(multi_scheduling) of
disabled ->
{skip, "Nothing to test"};
_ ->
Onln = erlang:system_info(schedulers_online),
try
scheduler_suspend_basic_test()
after
erlang:system_flag(schedulers_online, Onln)
end
end.
scheduler_suspend_basic_test() ->
%% The receives after setting scheduler states are there
%% since the operation is not fully synchronous. For example,
%% we do not wait for dirty cpu schedulers online to complete
%% before returning from erlang:system_flag(schedulers_online, _).
erlang:system_flag(schedulers_online,
erlang:system_info(schedulers)),
try
erlang:system_flag(dirty_cpu_schedulers_online,
erlang:system_info(dirty_cpu_schedulers)),
receive after 500 -> ok end
catch
_ : _ ->
ok
end,
S0 = sched_state(),
io:format("~p~n", [S0]),
{{normal,NTot0,NOnln0,NAct0},
{dirty_cpu,DCTot0,DCOnln0,DCAct0},
{dirty_io,DITot0,DIOnln0,DIAct0}} = S0,
enabled = erlang:system_info(multi_scheduling),
DCOne = case DCTot0 of
0 -> 0;
_ -> 1
end,
blocked_normal = erlang:system_flag(multi_scheduling, block_normal),
blocked_normal = erlang:system_info(multi_scheduling),
{{normal,NTot0,NOnln0,1},
{dirty_cpu,DCTot0,DCOnln0,DCAct0},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
NOnln0 = erlang:system_flag(schedulers_online, 1),
receive after 500 -> ok end,
{{normal,NTot0,1,1},
{dirty_cpu,DCTot0,DCOne,DCOne},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
1 = erlang:system_flag(schedulers_online, NOnln0),
receive after 500 -> ok end,
{{normal,NTot0,NOnln0,1},
{dirty_cpu,DCTot0,DCOnln0,DCAct0},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
blocked = erlang:system_flag(multi_scheduling, block),
blocked = erlang:system_info(multi_scheduling),
receive after 500 -> ok end,
{{normal,NTot0,NOnln0,1},
{dirty_cpu,DCTot0,DCOnln0,0},
{dirty_io,DITot0,DIOnln0,0}} = sched_state(),
NOnln0 = erlang:system_flag(schedulers_online, 1),
receive after 500 -> ok end,
{{normal,NTot0,1,1},
{dirty_cpu,DCTot0,DCOne,0},
{dirty_io,DITot0,DIOnln0,0}} = sched_state(),
1 = erlang:system_flag(schedulers_online, NOnln0),
receive after 500 -> ok end,
{{normal,NTot0,NOnln0,1},
{dirty_cpu,DCTot0,DCOnln0,0},
{dirty_io,DITot0,DIOnln0,0}} = sched_state(),
blocked = erlang:system_flag(multi_scheduling, unblock_normal),
blocked = erlang:system_info(multi_scheduling),
{{normal,NTot0,NOnln0,1},
{dirty_cpu,DCTot0,DCOnln0,0},
{dirty_io,DITot0,DIOnln0,0}} = sched_state(),
enabled = erlang:system_flag(multi_scheduling, unblock),
enabled = erlang:system_info(multi_scheduling),
receive after 500 -> ok end,
{{normal,NTot0,NOnln0,NAct0},
{dirty_cpu,DCTot0,DCOnln0,DCAct0},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
NOnln0 = erlang:system_flag(schedulers_online, 1),
receive after 500 -> ok end,
{{normal,NTot0,1,1},
{dirty_cpu,DCTot0,DCOne,DCOne},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
1 = erlang:system_flag(schedulers_online, NOnln0),
receive after 500 -> ok end,
{{normal,NTot0,NOnln0,NAct0},
{dirty_cpu,DCTot0,DCOnln0,DCAct0},
{dirty_io,DITot0,DIOnln0,DIAct0}} = sched_state(),
ok.
scheduler_suspend(Config) when is_list(Config) ->
ct:timetrap({minutes, 5}),
lists:foreach(fun (S) -> scheduler_suspend_test(Config, S) end,
[64, 32, 16, default]),
ok.
scheduler_suspend_test(Config, Schedulers) ->
Cmd = case Schedulers of
default ->
"";
_ ->
S = integer_to_list(Schedulers),
"+S"++S++":"++S
end,
{ok, Node} = start_node(Config, Cmd),
[SState] = mcall(Node, [fun () ->
erlang:system_info(schedulers_state)
end]),
io:format("SState=~p~n", [SState]),
{Sched, SchedOnln, _SchedAvail} = SState,
true = is_integer(Sched),
[ok] = mcall(Node, [fun () -> sst0_loop(300) end]),
[ok] = mcall(Node, [fun () -> sst1_loop(300) end]),
[ok] = mcall(Node, [fun () -> sst2_loop(300) end]),
[ok] = mcall(Node, [fun () -> sst4_loop(300) end]),
[ok] = mcall(Node, [fun () -> sst5_loop(300) end]),
[ok, ok, ok, ok,
ok, ok, ok] = mcall(Node,
[fun () -> sst0_loop(200) end,
fun () -> sst1_loop(200) end,
fun () -> sst2_loop(200) end,
fun () -> sst2_loop(200) end,
fun () -> sst3_loop(Sched, 200) end,
fun () -> sst4_loop(200) end,
fun () -> sst5_loop(200) end]),
[SState] = mcall(Node, [fun () ->
case Sched == SchedOnln of
false ->
Sched = erlang:system_flag(
schedulers_online,
SchedOnln);
true ->
ok
end,
until(fun () ->
{_A, B, C} = erlang:system_info(
schedulers_state),
B == C
end,
erlang:monotonic_time()
+ erlang:convert_time_unit(1,
seconds,
native)),
erlang:system_info(schedulers_state)
end]),
stop_node(Node),
ok.
until(Pred, MaxTime) ->
case Pred() of
true ->
true;
false ->
case erlang:monotonic_time() > MaxTime of
true ->
false;
false ->
receive after 100 -> ok end,
until(Pred, MaxTime)
end
end.
sst0_loop(0) ->
ok;
sst0_loop(N) ->
erlang:system_flag(multi_scheduling, block),
erlang:system_flag(multi_scheduling, unblock),
erlang:yield(),
sst0_loop(N-1).
sst1_loop(0) ->
ok;
sst1_loop(N) ->
erlang:system_flag(multi_scheduling, block),
erlang:system_flag(multi_scheduling, unblock),
sst1_loop(N-1).
sst2_loop(0) ->
ok;
sst2_loop(N) ->
erlang:system_flag(multi_scheduling, block),
erlang:system_flag(multi_scheduling, block),
erlang:system_flag(multi_scheduling, block),
erlang:system_flag(multi_scheduling, unblock),
erlang:system_flag(multi_scheduling, unblock),
erlang:system_flag(multi_scheduling, unblock),
sst2_loop(N-1).
sst3_loop(S, N) ->
case erlang:system_info(dirty_cpu_schedulers) of
0 -> sst3_loop_normal_schedulers_only(S, N);
DS -> sst3_loop_with_dirty_schedulers(S, DS, N)
end.
sst3_loop_normal_schedulers_only(_S, 0) ->
ok;
sst3_loop_normal_schedulers_only(S, N) ->
erlang:system_flag(schedulers_online, (S div 2)+1),
erlang:system_flag(schedulers_online, 1),
erlang:system_flag(schedulers_online, (S div 2)+1),
erlang:system_flag(schedulers_online, S),
erlang:system_flag(schedulers_online, 1),
erlang:system_flag(schedulers_online, S),
sst3_loop_normal_schedulers_only(S, N-1).
sst3_loop_with_dirty_schedulers(_S, _DS, 0) ->
ok;
sst3_loop_with_dirty_schedulers(S, DS, N) ->
erlang:system_flag(schedulers_online, (S div 2)+1),
erlang:system_flag(dirty_cpu_schedulers_online, (DS div 2)+1),
erlang:system_flag(schedulers_online, 1),
erlang:system_flag(schedulers_online, (S div 2)+1),
erlang:system_flag(dirty_cpu_schedulers_online, 1),
erlang:system_flag(schedulers_online, S),
erlang:system_flag(dirty_cpu_schedulers_online, DS),
erlang:system_flag(schedulers_online, 1),
erlang:system_flag(schedulers_online, S),
erlang:system_flag(dirty_cpu_schedulers_online, DS),
sst3_loop_with_dirty_schedulers(S, DS, N-1).
sst4_loop(0) ->
ok;
sst4_loop(N) ->
erlang:system_flag(multi_scheduling, block_normal),
erlang:system_flag(multi_scheduling, unblock_normal),
sst4_loop(N-1).
sst5_loop(0) ->
ok;
sst5_loop(N) ->
erlang:system_flag(multi_scheduling, block_normal),
erlang:system_flag(multi_scheduling, unblock_normal),
sst5_loop(N-1).
reader_groups(Config) when is_list(Config) ->
%% White box testing. These results are correct, but other results
%% could be too...
%% The actual tilepro64 topology
CPUT0 = [{processor,[{node,[{core,{logical,0}},
{core,{logical,1}},
{core,{logical,2}},
{core,{logical,8}},
{core,{logical,9}},
{core,{logical,10}},
{core,{logical,11}},
{core,{logical,16}},
{core,{logical,17}},
{core,{logical,18}},
{core,{logical,19}},
{core,{logical,24}},
{core,{logical,25}},
{core,{logical,27}},
{core,{logical,29}}]},
{node,[{core,{logical,3}},
{core,{logical,4}},
{core,{logical,5}},
{core,{logical,6}},
{core,{logical,7}},
{core,{logical,12}},
{core,{logical,13}},
{core,{logical,14}},
{core,{logical,15}},
{core,{logical,20}},
{core,{logical,21}},
{core,{logical,22}},
{core,{logical,23}},
{core,{logical,28}},
{core,{logical,30}}]},
{node,[{core,{logical,31}},
{core,{logical,36}},
{core,{logical,37}},
{core,{logical,38}},
{core,{logical,44}},
{core,{logical,45}},
{core,{logical,46}},
{core,{logical,47}},
{core,{logical,51}},
{core,{logical,52}},
{core,{logical,53}},
{core,{logical,54}},
{core,{logical,55}},
{core,{logical,60}},
{core,{logical,61}}]},
{node,[{core,{logical,26}},
{core,{logical,32}},
{core,{logical,33}},
{core,{logical,34}},
{core,{logical,35}},
{core,{logical,39}},
{core,{logical,40}},
{core,{logical,41}},
{core,{logical,42}},
{core,{logical,43}},
{core,{logical,48}},
{core,{logical,49}},
{core,{logical,50}},
{core,{logical,58}}]}]}],
[{0,1},{1,1},{2,1},{3,3},{4,3},{5,3},{6,3},{7,3},{8,1},{9,1},{10,1},
{11,1},{12,3},{13,3},{14,4},{15,4},{16,2},{17,2},{18,2},{19,2},
{20,4},{21,4},{22,4},{23,4},{24,2},{25,2},{26,7},{27,2},{28,4},
{29,2},{30,4},{31,5},{32,7},{33,7},{34,7},{35,7},{36,5},{37,5},
{38,5},{39,7},{40,7},{41,8},{42,8},{43,8},{44,5},{45,5},{46,5},
{47,6},{48,8},{49,8},{50,8},{51,6},{52,6},{53,6},{54,6},{55,6},
{58,8},{60,6},{61,6}]
= reader_groups_map(CPUT0, 8),
CPUT1 = [n([p([c([t(l(0)),t(l(1)),t(l(2)),t(l(3))]),
c([t(l(4)),t(l(5)),t(l(6)),t(l(7))]),
c([t(l(8)),t(l(9)),t(l(10)),t(l(11))]),
c([t(l(12)),t(l(13)),t(l(14)),t(l(15))])]),
p([c([t(l(16)),t(l(17)),t(l(18)),t(l(19))]),
c([t(l(20)),t(l(21)),t(l(22)),t(l(23))]),
c([t(l(24)),t(l(25)),t(l(26)),t(l(27))]),
c([t(l(28)),t(l(29)),t(l(30)),t(l(31))])])]),
n([p([c([t(l(32)),t(l(33)),t(l(34)),t(l(35))]),
c([t(l(36)),t(l(37)),t(l(38)),t(l(39))]),
c([t(l(40)),t(l(41)),t(l(42)),t(l(43))]),
c([t(l(44)),t(l(45)),t(l(46)),t(l(47))])]),
p([c([t(l(48)),t(l(49)),t(l(50)),t(l(51))]),
c([t(l(52)),t(l(53)),t(l(54)),t(l(55))]),
c([t(l(56)),t(l(57)),t(l(58)),t(l(59))]),
c([t(l(60)),t(l(61)),t(l(62)),t(l(63))])])]),
n([p([c([t(l(64)),t(l(65)),t(l(66)),t(l(67))]),
c([t(l(68)),t(l(69)),t(l(70)),t(l(71))]),
c([t(l(72)),t(l(73)),t(l(74)),t(l(75))]),
c([t(l(76)),t(l(77)),t(l(78)),t(l(79))])]),
p([c([t(l(80)),t(l(81)),t(l(82)),t(l(83))]),
c([t(l(84)),t(l(85)),t(l(86)),t(l(87))]),
c([t(l(88)),t(l(89)),t(l(90)),t(l(91))]),
c([t(l(92)),t(l(93)),t(l(94)),t(l(95))])])]),
n([p([c([t(l(96)),t(l(97)),t(l(98)),t(l(99))]),
c([t(l(100)),t(l(101)),t(l(102)),t(l(103))]),
c([t(l(104)),t(l(105)),t(l(106)),t(l(107))]),
c([t(l(108)),t(l(109)),t(l(110)),t(l(111))])]),
p([c([t(l(112)),t(l(113)),t(l(114)),t(l(115))]),
c([t(l(116)),t(l(117)),t(l(118)),t(l(119))]),
c([t(l(120)),t(l(121)),t(l(122)),t(l(123))]),
c([t(l(124)),t(l(125)),t(l(126)),t(l(127))])])])],
[{0,1},{1,1},{2,1},{3,1},{4,2},{5,2},{6,2},{7,2},{8,3},{9,3},
{10,3},{11,3},{12,4},{13,4},{14,4},{15,4},{16,5},{17,5},{18,5},
{19,5},{20,6},{21,6},{22,6},{23,6},{24,7},{25,7},{26,7},{27,7},
{28,8},{29,8},{30,8},{31,8},{32,9},{33,9},{34,9},{35,9},{36,10},
{37,10},{38,10},{39,10},{40,11},{41,11},{42,11},{43,11},{44,12},
{45,12},{46,12},{47,12},{48,13},{49,13},{50,13},{51,13},{52,14},
{53,14},{54,14},{55,14},{56,15},{57,15},{58,15},{59,15},{60,16},
{61,16},{62,16},{63,16},{64,17},{65,17},{66,17},{67,17},{68,18},
{69,18},{70,18},{71,18},{72,19},{73,19},{74,19},{75,19},{76,20},
{77,20},{78,20},{79,20},{80,21},{81,21},{82,21},{83,21},{84,22},
{85,22},{86,22},{87,22},{88,23},{89,23},{90,23},{91,23},{92,24},
{93,24},{94,24},{95,24},{96,25},{97,25},{98,25},{99,25},{100,26},
{101,26},{102,26},{103,26},{104,27},{105,27},{106,27},{107,27},
{108,28},{109,28},{110,28},{111,28},{112,29},{113,29},{114,29},
{115,29},{116,30},{117,30},{118,30},{119,30},{120,31},{121,31},
{122,31},{123,31},{124,32},{125,32},{126,32},{127,32}]
= reader_groups_map(CPUT1, 128),
[{0,1},{1,1},{2,1},{3,1},{4,1},{5,1},{6,1},{7,1},{8,1},{9,1},{10,1},
{11,1},{12,1},{13,1},{14,1},{15,1},{16,1},{17,1},{18,1},{19,1},
{20,1},{21,1},{22,1},{23,1},{24,1},{25,1},{26,1},{27,1},{28,1},
{29,1},{30,1},{31,1},{32,1},{33,1},{34,1},{35,1},{36,1},{37,1},
{38,1},{39,1},{40,1},{41,1},{42,1},{43,1},{44,1},{45,1},{46,1},
{47,1},{48,1},{49,1},{50,1},{51,1},{52,1},{53,1},{54,1},{55,1},
{56,1},{57,1},{58,1},{59,1},{60,1},{61,1},{62,1},{63,1},{64,2},
{65,2},{66,2},{67,2},{68,2},{69,2},{70,2},{71,2},{72,2},{73,2},
{74,2},{75,2},{76,2},{77,2},{78,2},{79,2},{80,2},{81,2},{82,2},
{83,2},{84,2},{85,2},{86,2},{87,2},{88,2},{89,2},{90,2},{91,2},
{92,2},{93,2},{94,2},{95,2},{96,2},{97,2},{98,2},{99,2},{100,2},
{101,2},{102,2},{103,2},{104,2},{105,2},{106,2},{107,2},{108,2},
{109,2},{110,2},{111,2},{112,2},{113,2},{114,2},{115,2},{116,2},
{117,2},{118,2},{119,2},{120,2},{121,2},{122,2},{123,2},{124,2},
{125,2},{126,2},{127,2}]
= reader_groups_map(CPUT1, 2),
[{0,1},{1,1},{2,1},{3,1},{4,2},{5,2},{6,2},{7,2},{8,3},{9,3},{10,3},
{11,3},{12,3},{13,3},{14,3},{15,3},{16,4},{17,4},{18,4},{19,4},
{20,4},{21,4},{22,4},{23,4},{24,5},{25,5},{26,5},{27,5},{28,5},
{29,5},{30,5},{31,5},{32,6},{33,6},{34,6},{35,6},{36,6},{37,6},
{38,6},{39,6},{40,7},{41,7},{42,7},{43,7},{44,7},{45,7},{46,7},
{47,7},{48,8},{49,8},{50,8},{51,8},{52,8},{53,8},{54,8},{55,8},
{56,9},{57,9},{58,9},{59,9},{60,9},{61,9},{62,9},{63,9},{64,10},
{65,10},{66,10},{67,10},{68,10},{69,10},{70,10},{71,10},{72,11},
{73,11},{74,11},{75,11},{76,11},{77,11},{78,11},{79,11},{80,12},
{81,12},{82,12},{83,12},{84,12},{85,12},{86,12},{87,12},{88,13},
{89,13},{90,13},{91,13},{92,13},{93,13},{94,13},{95,13},{96,14},
{97,14},{98,14},{99,14},{100,14},{101,14},{102,14},{103,14},
{104,15},{105,15},{106,15},{107,15},{108,15},{109,15},{110,15},
{111,15},{112,16},{113,16},{114,16},{115,16},{116,16},{117,16},
{118,16},{119,16},{120,17},{121,17},{122,17},{123,17},{124,17},
{125,17},{126,17},{127,17}]
= reader_groups_map(CPUT1, 17),
[{0,1},{1,1},{2,1},{3,1},{4,1},{5,1},{6,1},{7,1},{8,1},{9,1},{10,1},
{11,1},{12,1},{13,1},{14,1},{15,1},{16,2},{17,2},{18,2},{19,2},
{20,2},{21,2},{22,2},{23,2},{24,2},{25,2},{26,2},{27,2},{28,2},
{29,2},{30,2},{31,2},{32,3},{33,3},{34,3},{35,3},{36,3},{37,3},
{38,3},{39,3},{40,3},{41,3},{42,3},{43,3},{44,3},{45,3},{46,3},
{47,3},{48,4},{49,4},{50,4},{51,4},{52,4},{53,4},{54,4},{55,4},
{56,4},{57,4},{58,4},{59,4},{60,4},{61,4},{62,4},{63,4},{64,5},
{65,5},{66,5},{67,5},{68,5},{69,5},{70,5},{71,5},{72,5},{73,5},
{74,5},{75,5},{76,5},{77,5},{78,5},{79,5},{80,6},{81,6},{82,6},
{83,6},{84,6},{85,6},{86,6},{87,6},{88,6},{89,6},{90,6},{91,6},
{92,6},{93,6},{94,6},{95,6},{96,7},{97,7},{98,7},{99,7},{100,7},
{101,7},{102,7},{103,7},{104,7},{105,7},{106,7},{107,7},{108,7},
{109,7},{110,7},{111,7},{112,7},{113,7},{114,7},{115,7},{116,7},
{117,7},{118,7},{119,7},{120,7},{121,7},{122,7},{123,7},{124,7},
{125,7},{126,7},{127,7}]
= reader_groups_map(CPUT1, 7),
CPUT2 = [p([c(l(0)),c(l(1)),c(l(2)),c(l(3)),c(l(4))]),
p([t(l(5)),t(l(6)),t(l(7)),t(l(8)),t(l(9))]),
p([t(l(10))]),
p([c(l(11)),c(l(12)),c(l(13))]),
p([c(l(14)),c(l(15))])],
[{0,1},{1,1},{2,1},{3,1},{4,1},
{5,2},{6,2},{7,2},{8,2},{9,2},
{10,3},
{11,4},{12,4},{13,4},
{14,5},{15,5}] = reader_groups_map(CPUT2, 5),
[{0,1},{1,1},{2,2},{3,2},{4,2},
{5,3},{6,3},{7,3},{8,3},{9,3},
{10,4},
{11,5},{12,5},{13,5},
{14,6},{15,6}] = reader_groups_map(CPUT2, 6),
[{0,1},{1,1},{2,2},{3,2},{4,2},
{5,3},{6,3},{7,3},{8,3},{9,3},
{10,4},
{11,5},{12,6},{13,6},
{14,7},{15,7}] = reader_groups_map(CPUT2, 7),
[{0,1},{1,1},{2,2},{3,2},{4,2},
{5,3},{6,3},{7,3},{8,3},{9,3},
{10,4},
{11,5},{12,6},{13,6},
{14,7},{15,8}] = reader_groups_map(CPUT2, 8),
[{0,1},{1,2},{2,2},{3,3},{4,3},
{5,4},{6,4},{7,4},{8,4},{9,4},
{10,5},
{11,6},{12,7},{13,7},
{14,8},{15,9}] = reader_groups_map(CPUT2, 9),
[{0,1},{1,2},{2,2},{3,3},{4,3},
{5,4},{6,4},{7,4},{8,4},{9,4},
{10,5},
{11,6},{12,7},{13,8},
{14,9},{15,10}] = reader_groups_map(CPUT2, 10),
[{0,1},{1,2},{2,3},{3,4},{4,4},
{5,5},{6,5},{7,5},{8,5},{9,5},
{10,6},
{11,7},{12,8},{13,9},
{14,10},{15,11}] = reader_groups_map(CPUT2, 11),
[{0,1},{1,2},{2,3},{3,4},{4,5},
{5,6},{6,6},{7,6},{8,6},{9,6},
{10,7},
{11,8},{12,9},{13,10},
{14,11},{15,12}] = reader_groups_map(CPUT2, 100),
CPUT3 = [p([t(l(5)),t(l(6)),t(l(7)),t(l(8)),t(l(9))]),
p([t(l(10))]),
p([c(l(11)),c(l(12)),c(l(13))]),
p([c(l(14)),c(l(15))]),
p([c(l(0)),c(l(1)),c(l(2)),c(l(3)),c(l(4))])],
[{0,5},{1,5},{2,6},{3,6},{4,6},
{5,1},{6,1},{7,1},{8,1},{9,1},
{10,2},{11,3},{12,3},{13,3},
{14,4},{15,4}] = reader_groups_map(CPUT3, 6),
CPUT4 = [p([t(l(0)),t(l(1)),t(l(2)),t(l(3)),t(l(4))]),
p([t(l(5))]),
p([c(l(6)),c(l(7)),c(l(8))]),
p([c(l(9)),c(l(10))]),
p([c(l(11)),c(l(12)),c(l(13)),c(l(14)),c(l(15))])],
[{0,1},{1,1},{2,1},{3,1},{4,1},
{5,2},
{6,3},{7,3},{8,3},
{9,4},{10,4},
{11,5},{12,5},{13,6},{14,6},{15,6}] = reader_groups_map(CPUT4, 6),
[{0,1},{1,1},{2,1},{3,1},{4,1},
{5,2},
{6,3},{7,4},{8,4},
{9,5},{10,5},
{11,6},{12,6},{13,7},{14,7},{15,7}] = reader_groups_map(CPUT4, 7),
[{0,1},{65535,2}] = reader_groups_map([c(l(0)),c(l(65535))], 10),
ok.
reader_groups_map(CPUT, Groups) ->
Old = erlang:system_info({cpu_topology, defined}),
erlang:system_flag(cpu_topology, CPUT),
enable_internal_state(),
Res = erts_debug:get_internal_state({reader_groups_map, Groups}),
erlang:system_flag(cpu_topology, Old),
lists:sort(Res).
%%
%% Utils
%%
sched_state() ->
sched_state(erlang:system_info(all_schedulers_state),
undefined,
{dirty_cpu,0,0,0},
{dirty_io,0,0,0}).
sched_state([], N, DC, DI) ->
try
chk_basic(N),
chk_basic(DC),
chk_basic(DI),
{N, DC, DI}
catch
_ : _ ->
ct:fail({inconsisten_scheduler_state, {N, DC, DI}})
end;
sched_state([{normal, _, _, _} = S | Rest], _S, DC, DI) ->
sched_state(Rest, S, DC, DI);
sched_state([{dirty_cpu, _, _, _} = DC | Rest], S, _DC, DI) ->
sched_state(Rest, S, DC, DI);
sched_state([{dirty_io, _, _, _} = DI | Rest], S, DC, _DI) ->
sched_state(Rest, S, DC, DI).
chk_basic({_Type, Tot, Onln, Act}) ->
true = Tot >= Onln,
true = Onln >= Act.
l(Id) ->
{logical, Id}.
t(X) ->
{thread, X}.
c(X) ->
{core, X}.
p(X) ->
{processor, X}.
n(X) ->
{node, X}.
mcall(Node, Funs) ->
Parent = self(),
Refs = lists:map(fun (Fun) ->
Ref = make_ref(),
spawn_link(Node,
fun () ->
Res = Fun(),
unlink(Parent),
Parent ! {Ref, Res}
end),
Ref
end, Funs),
lists:map(fun (Ref) ->
receive
{Ref, Res} ->
Res
end
end, Refs).
erl_rel_flag_var() ->
"ERL_OTP"++erlang:system_info(otp_release)++"_FLAGS".
clear_erl_rel_flags() ->
EnvVar = erl_rel_flag_var(),
case os:getenv(EnvVar) of
false ->
false;
Value ->
os:putenv(EnvVar, ""),
Value
end.
restore_erl_rel_flags(false) ->
ok;
restore_erl_rel_flags(OldValue) ->
os:putenv(erl_rel_flag_var(), OldValue),
ok.
ok(too_slow, _Config) ->
{comment, "Too slow system to do any actual testing..."};
ok(_Res, Config) ->
proplists:get_value(ok_res, Config).
chk_result(too_slow,
_LWorkers,
_NWorkers,
_HWorkers,
_MWorkers,
_LNShouldWork,
_HShouldWork,
_MShouldWork) ->
ok;
chk_result([{low, L, Lmin, _Lmax},
{normal, N, Nmin, _Nmax},
{high, H, Hmin, _Hmax},
{max, M, Mmin, _Mmax}] = Res,
LWorkers,
NWorkers,
HWorkers,
MWorkers,
LNShouldWork,
HShouldWork,
MShouldWork) ->
io:format("~p~n", [Res]),
Relax = relax_limits(),
case {L, N} of
{0, 0} ->
false = LNShouldWork;
_ ->
{LminRatioLim,
NminRatioLim,
LNRatioLimMin,
LNRatioLimMax} = case Relax of
false -> {0.5, 0.5, 0.05, 0.25};
true -> {0.05, 0.05, 0.01, 0.4}
end,
Lavg = L/LWorkers,
Navg = N/NWorkers,
Ratio = Lavg/Navg,
LminRatio = Lmin/Lavg,
NminRatio = Nmin/Navg,
io:format("low min ratio=~p~n"
"normal min ratio=~p~n"
"low avg=~p~n"
"normal avg=~p~n"
"low/normal ratio=~p~n",
[LminRatio, NminRatio, Lavg, Navg, Ratio]),
erlang:display({low_min_ratio, LminRatio}),
erlang:display({normal_min_ratio, NminRatio}),
erlang:display({low_avg, Lavg}),
erlang:display({normal_avg, Navg}),
erlang:display({low_normal_ratio, Ratio}),
chk_lim(LminRatioLim, LminRatio, 1.0, low_min_ratio),
chk_lim(NminRatioLim, NminRatio, 1.0, normal_min_ratio),
chk_lim(LNRatioLimMin, Ratio, LNRatioLimMax, low_normal_ratio),
true = LNShouldWork,
ok
end,
case H of
0 ->
false = HShouldWork;
_ ->
HminRatioLim = case Relax of
false -> 0.5;
true -> 0.1
end,
Havg = H/HWorkers,
HminRatio = Hmin/Havg,
erlang:display({high_min_ratio, HminRatio}),
chk_lim(HminRatioLim, HminRatio, 1.0, high_min_ratio),
true = HShouldWork,
ok
end,
case M of
0 ->
false = MShouldWork;
_ ->
MminRatioLim = case Relax of
false -> 0.5;
true -> 0.1
end,
Mavg = M/MWorkers,
MminRatio = Mmin/Mavg,
erlang:display({max_min_ratio, MminRatio}),
chk_lim(MminRatioLim, MminRatio, 1.0, max_min_ratio),
true = MShouldWork,
ok
end,
ok.
chk_lim(Min, V, Max, _What) when Min =< V, V =< Max ->
ok;
chk_lim(_Min, V, _Max, What) ->
ct:fail({bad, What, V}).
snd(_Msg, []) ->
[];
snd(Msg, [P|Ps]) ->
P ! Msg,
Ps.
relax_limits() ->
case strange_system_scale() of
Scale when Scale > 1 ->
io:format("Relaxing limits~n", []),
true;
_ ->
false
end.
strange_system_scale() ->
S0 = 1,
S1 = case erlang:system_info(schedulers_online)
> erlang:system_info(logical_processors) of
true -> S0*2;
false -> S0
end,
S2 = case erlang:system_info(debug_compiled) of
true -> S1*10;
false ->
case erlang:system_info(lock_checking) of
true -> S1*2;
false -> S1
end
end,
S3 = case lock_counting() of
true -> S2*2;
false -> S2
end,
S3.
lock_counting() ->
lock_counting(erlang:system_info(system_version)).
lock_counting([]) ->
false;
lock_counting([$[,$l,$o,$c,$k,$-,$c,$o,$u,$n,$t,$i,$n,$g,$],_]) ->
true;
lock_counting([_C|Cs]) ->
lock_counting(Cs).
go_work([], [], [], []) ->
[];
go_work(L, N, [], []) ->
go_work(snd(go_work, L), snd(go_work, N), [], []);
go_work(L, N, H, []) ->
go_work(L, N, snd(go_work, H), []);
go_work(L, N, H, M) ->
go_work(L, N, H, snd(go_work, M)).
stop_work([], [], [], []) ->
[];
stop_work([], [], [], M) ->
stop_work([], [], [], snd(stop_work, M));
stop_work([], [], H, M) ->
stop_work([], [], snd(stop_work, H), M);
stop_work(L, N, H, M) ->
stop_work(snd(stop_work, L), snd(stop_work, N), H, M).
wait_balance(N) when is_integer(N) ->
case erlang:system_info(schedulers_active) of
1 ->
done;
_ ->
erts_debug:set_internal_state(available_internal_state,true),
Start = erts_debug:get_internal_state(nbalance),
End = (Start + N) band ((1 bsl (8*erlang:system_info(wordsize)))-1),
wait_balance(Start, End),
erts_debug:set_internal_state(available_internal_state,false)
end.
wait_balance(Start, End) ->
X = erts_debug:get_internal_state(nbalance),
case End =< X of
true ->
case Start =< End of
true ->
done;
false ->
case X < Start of
true ->
done;
false ->
receive after 250 -> ok end,
wait_balance(Start, End)
end
end;
false ->
receive after 250 -> ok end,
wait_balance(Start, End)
end.
wait_reds(RedsLimit, Timeout) ->
Stop = erlang:start_timer(Timeout, self(), stop),
statistics(reductions),
wait_reds(0, RedsLimit, Stop).
wait_reds(Reds, RedsLimit, Stop) when Reds < RedsLimit ->
receive
{timeout, Stop, stop} ->
erlang:display(timeout),
erlang:display({reduction_limit, RedsLimit}),
erlang:display({reductions, Reds}),
done
after 10000 ->
{_, NewReds} = statistics(reductions),
wait_reds(NewReds+Reds, RedsLimit, Stop)
end;
wait_reds(Reds, RedsLimit, Stop) when is_reference(Stop) ->
erlang:cancel_timer(Stop),
receive {timeout, Stop, stop} -> ok after 0 -> ok end,
wait_reds(Reds, RedsLimit, false);
wait_reds(Reds, RedsLimit, _Stop) ->
erlang:display({reduction_limit, RedsLimit}),
erlang:display({reductions, Reds}),
done.
do_it(Tracer, Low, Normal, High, Max) ->
do_it(Tracer, Low, Normal, High, Max, ?DEFAULT_TEST_REDS_PER_SCHED).
do_it(Tracer, Low, Normal, High, Max, RedsPerSchedLimit) ->
OldPrio = process_flag(priority, max),
go_work(Low, Normal, High, Max),
StartWait = erlang:monotonic_time(millisecond),
%% Give the emulator a chance to balance the load...
wait_balance(5),
EndWait = erlang:monotonic_time(millisecond),
BalanceWait = EndWait-StartWait,
erlang:display({balance_wait, BalanceWait}),
Timeout = (15 - 4)*60*1000 - BalanceWait,
Res = case Timeout < 60*1000 of
true ->
stop_work(Low, Normal, High, Max),
too_slow;
false ->
set_tracing(true, Tracer, normal, Normal),
set_tracing(true, Tracer, low, Low),
set_tracing(true, Tracer, high, High),
set_tracing(true, Tracer, max, Max),
wait_reds(RedsPerSchedLimit
* erlang:system_info(schedulers_online),
Timeout),
set_tracing(false, Tracer, normal, Normal),
set_tracing(false, Tracer, low, Low),
set_tracing(false, Tracer, high, High),
set_tracing(false, Tracer, max, Max),
stop_work(Low, Normal, High, Max),
get_trace_result(Tracer)
end,
process_flag(priority, OldPrio),
Res.
workers_exit([]) ->
ok;
workers_exit([P|Ps]) when is_pid(P) ->
Mon = erlang:monitor(process, P),
unlink(P),
exit(P, kill),
workers_exit(Ps),
receive {'DOWN', Mon, process, P, _} -> ok end,
ok;
workers_exit([[]]) ->
ok;
workers_exit([Ps|Pss]) ->
workers_exit(Ps),
workers_exit(Pss).
do_work(PartTime) ->
lists:reverse(lists:seq(1, 50)),
receive stop_work -> receive after infinity -> ok end after 0 -> ok end,
case PartTime of
true -> receive after 1 -> ok end;
false -> ok
end,
do_work(PartTime).
workers(N, _Prio, _PartTime) when N =< 0 ->
[];
workers(N, Prio, PartTime) ->
Parent = self(),
W = spawn_opt(fun () ->
Parent ! {ready, self()},
receive
go_work ->
do_work(PartTime)
end
end,
[{priority, Prio}, link]),
Ws = workers(N-1, Prio, PartTime),
receive {ready, W} -> ok end,
[W|Ws].
workers(N, Prio) ->
workers(N, Prio, false).
part_time_workers(N, Prio) ->
workers(N, Prio, true).
tracer(Low, Normal, High, Max) ->
receive
{tracees, Prio, Tracees} ->
save_tracees(Prio, Tracees),
case Prio of
low -> tracer(Tracees++Low, Normal, High, Max);
normal -> tracer(Low, Tracees++Normal, High, Max);
high -> tracer(Low, Normal, Tracees++High, Max);
max -> tracer(Low, Normal, High, Tracees++Max)
end;
{get_result, Ref, Who} ->
Delivered = erlang:trace_delivered(all),
receive
{trace_delivered, all, Delivered} ->
ok
end,
{Lc, Nc, Hc, Mc} = read_trace(),
GetMinMax
= fun (Prio, Procs) ->
LargeNum = 1 bsl 64,
case lists:foldl(fun (P, {Mn, Mx} = MnMx) ->
{Prio, C} = get(P),
case C < Mn of
true ->
case C > Mx of
true ->
{C, C};
false ->
{C, Mx}
end;
false ->
case C > Mx of
true -> {Mn, C};
false -> MnMx
end
end
end,
{LargeNum, 0},
Procs) of
{LargeNum, 0} -> {0, 0};
Res -> Res
end
end,
{Lmin, Lmax} = GetMinMax(low, Low),
{Nmin, Nmax} = GetMinMax(normal, Normal),
{Hmin, Hmax} = GetMinMax(high, High),
{Mmin, Mmax} = GetMinMax(max, Max),
Who ! {trace_result, Ref, [{low, Lc, Lmin, Lmax},
{normal, Nc, Nmin, Nmax},
{high, Hc, Hmin, Hmax},
{max, Mc, Mmin, Mmax}]}
end.
read_trace() ->
read_trace(0,0,0,0).
read_trace(Low, Normal, High, Max) ->
receive
{trace, Proc, in, _} ->
{Prio, Count} = get(Proc),
put(Proc, {Prio, Count+1}),
case Prio of
low -> read_trace(Low+1, Normal, High, Max);
normal -> read_trace(Low, Normal+1, High, Max);
high -> read_trace(Low, Normal, High+1, Max);
max -> read_trace(Low, Normal, High, Max+1)
end;
{trace, _Proc, out, _} ->
read_trace(Low, Normal, High, Max)
after 0 ->
{Low, Normal, High, Max}
end.
save_tracees(_Prio, []) ->
ok;
save_tracees(Prio, [T|Ts]) ->
put(T, {Prio, 0}),
save_tracees(Prio, Ts).
start_tracer() ->
Tracer = spawn_link(fun () -> tracer([], [], [], []) end),
true = erlang:suspend_process(Tracer),
Tracer.
get_trace_result(Tracer) ->
erlang:resume_process(Tracer),
Ref = make_ref(),
Tracer ! {get_result, Ref, self()},
receive
{trace_result, Ref, Res} ->
Res
end.
set_tracing(_On, _Tracer, _Prio, []) ->
ok;
set_tracing(true, Tracer, Prio, Pids) ->
Tracer ! {tracees, Prio, Pids},
set_tracing(true, Tracer, Pids);
set_tracing(false, Tracer, _Prio, Pids) ->
set_tracing(false, Tracer, Pids).
set_tracing(_On, _Tracer, []) ->
ok;
set_tracing(On, Tracer, [Pid|Pids]) ->
1 = erlang:trace(Pid, On, [running, {tracer, Tracer}]),
set_tracing(On, Tracer, Pids).
active_schedulers() ->
case erlang:system_info(schedulers_online) of
1 ->
1;
N ->
case erlang:system_info(multi_scheduling) of
blocked -> 1;
enabled -> N
end
end.
start_node(Config) ->
start_node(Config, "").
start_node(Config, Args) when is_list(Config) ->
Pa = filename:dirname(code:which(?MODULE)),
Name = list_to_atom(atom_to_list(?MODULE)
++ "-"
++ atom_to_list(proplists:get_value(testcase, Config))
++ "-"
++ integer_to_list(erlang:system_time(second))
++ "-"
++ integer_to_list(erlang:unique_integer([positive]))),
test_server:start_node(Name, slave, [{args, "-pa "++Pa++" "++Args}]).
stop_node(Node) ->
test_server:stop_node(Node).
enable_internal_state() ->
case catch erts_debug:get_internal_state(available_internal_state) of
true -> true;
_ -> erts_debug:set_internal_state(available_internal_state, true)
end.
cmp(X, X) ->
ok;
cmp(X, Y) ->
io:format("cmp failed:~n X=~p~n Y=~p~n", [X,Y]),
cmp_aux(X, Y).
cmp_aux([X0|Y0], [X1|Y1]) ->
cmp_aux(X0, X1),
cmp_aux(Y0, Y1);
cmp_aux(T0, T1) when is_tuple(T0), is_tuple(T1), size(T0) == size(T1) ->
cmp_tuple(T0, T1, 1, size(T0));
cmp_aux(X, X) ->
ok;
cmp_aux(F0, F1) ->
ct:fail({no_match, F0, F1}).
cmp_tuple(_T0, _T1, N, Sz) when N > Sz ->
ok;
cmp_tuple(T0, T1, N, Sz) ->
cmp_aux(element(N, T0), element(N, T1)),
cmp_tuple(T0, T1, N+1, Sz).
