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-rw-r--r--erts/emulator/test/driver_SUITE.erl325
-rw-r--r--erts/emulator/test/driver_SUITE_data/Makefile.src3
-rw-r--r--erts/emulator/test/driver_SUITE_data/consume_timeslice_drv.c172
3 files changed, 497 insertions, 3 deletions
diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl
index dae36fed8f..dfba7d098f 100644
--- a/erts/emulator/test/driver_SUITE.erl
+++ b/erts/emulator/test/driver_SUITE.erl
@@ -78,7 +78,8 @@
otp_9302/1,
thr_free_drv/1,
async_blast/1,
- thr_msg_blast/1]).
+ thr_msg_blast/1,
+ consume_timeslice/1]).
-export([bin_prefix/2]).
@@ -149,7 +150,8 @@ all() ->
otp_9302,
thr_free_drv,
async_blast,
- thr_msg_blast].
+ thr_msg_blast,
+ consume_timeslice].
groups() ->
[{timer, [],
@@ -2073,10 +2075,329 @@ thr_msg_blast(Config) when is_list(Config) ->
Res
end.
+consume_timeslice(Config) when is_list(Config) ->
+ %%
+ %% Verify that erl_drv_consume_timeslice() works.
+ %%
+ %% The first four cases expect that the command signal is
+ %% delivered immediately, i.e., isn't scheduled. Since there
+ %% are no conflicts these signals should normally be delivered
+ %% immediately. However some builds and configurations may
+ %% schedule these ops anyway, in these cases we do not verify
+ %% scheduling counts.
+ %%
+ %% When signal is delivered immediately we must take into account
+ %% that process and port are "virtualy" scheduled out and in
+ %% in the trace generated.
+ %%
+ %% Port ! {_, {command, _}, and port_command() differs. The send
+ %% instruction needs to check if the caller is out of reductions
+ %% at the end of the instruction, since no erlang function call
+ %% is involved. Otherwise, a sequence of send instructions would
+ %% not be scheduled out even when out of reductions. port_commond()
+ %% doesn't do that since it will always (since R16A) be called via
+ %% the erlang wrappers in the erlang module.
+ %%
+ %% The last two cases tests scheduled operations. We create
+ %% a conflict by executing at the same time on different
+ %% schedulers. When only one scheduler we enable parallelism on
+ %% the port instead.
+ %%
+
+ Path = ?config(data_dir, Config),
+ erl_ddll:start(),
+ ok = load_driver(Path, consume_timeslice_drv),
+ Port = open_port({spawn, consume_timeslice_drv}, [{parallelism, false}]),
+
+ Parent = self(),
+ Go = make_ref(),
+
+ "enabled" = port_control(Port, $E, ""),
+ Proc1 = spawn_link(fun () ->
+ receive Go -> ok end,
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}}
+ end),
+ receive after 100 -> ok end,
+ count_pp_sched_start(),
+ Proc1 ! Go,
+ wait_command_msgs(Port, 10),
+ [{Port, Sprt1}, {Proc1, Sproc1}] = count_pp_sched_stop([Port, Proc1]),
+ case Sprt1 of
+ 10 ->
+ true = in_range(5, Sproc1-10, 7);
+ _ ->
+ case erlang:system_info(lock_checking) of
+ true -> ?t:format("Ignore bad sched count due to lock checking", []);
+ false -> ?t:fail({unexpected_sched_counts, Sprt1, Sproc1})
+ end
+ end,
+
+ "disabled" = port_control(Port, $D, ""),
+ Proc2 = spawn_link(fun () ->
+ receive Go -> ok end,
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}},
+ Port ! {Parent, {command, ""}}
+ end),
+ receive after 100 -> ok end,
+ count_pp_sched_start(),
+ Proc2 ! Go,
+ wait_command_msgs(Port, 10),
+ [{Port, Sprt2}, {Proc2, Sproc2}] = count_pp_sched_stop([Port, Proc2]),
+ case Sprt2 of
+ 10 ->
+ true = in_range(1, Sproc2-10, 2);
+ _ ->
+ case erlang:system_info(lock_checking) of
+ true -> ?t:format("Ignore bad sched count due to lock checking", []);
+ false -> ?t:fail({unexpected_sched_counts, Sprt2, Sproc2})
+ end
+ end,
+
+ "enabled" = port_control(Port, $E, ""),
+ Proc3 = spawn_link(fun () ->
+ receive Go -> ok end,
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, "")
+ end),
+ count_pp_sched_start(),
+ Proc3 ! Go,
+ wait_command_msgs(Port, 10),
+ [{Port, Sprt3}, {Proc3, Sproc3}] = count_pp_sched_stop([Port, Proc3]),
+ case Sprt3 of
+ 10 ->
+ true = in_range(5, Sproc3-10, 7);
+ _ ->
+ case erlang:system_info(lock_checking) of
+ true -> ?t:format("Ignore bad sched count due to lock checking", []);
+ false -> ?t:fail({unexpected_sched_counts, Sprt3, Sproc3})
+ end
+ end,
+
+ "disabled" = port_control(Port, $D, ""),
+ Proc4 = spawn_link(fun () ->
+ receive Go -> ok end,
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, ""),
+ port_command(Port, "")
+ end),
+ count_pp_sched_start(),
+ Proc4 ! Go,
+ wait_command_msgs(Port, 10),
+ [{Port, Sprt4}, {Proc4, Sproc4}] = count_pp_sched_stop([Port, Proc4]),
+ case Sprt4 of
+ 10 ->
+ true = in_range(1, Sproc4-10, 2);
+ _ ->
+ case erlang:system_info(lock_checking) of
+ true -> ?t:format("Ignore bad sched count due to lock checking", []);
+ false -> ?t:fail({unexpected_sched_counts, Sprt4, Sproc4})
+ end
+ end,
+
+ SOnl = erlang:system_info(schedulers_online),
+ %% If only one scheduler use port with parallelism set to true,
+ %% in order to trigger scheduling of command signals
+ Port2 = case SOnl of
+ 1 ->
+ Port ! {self(), close},
+ receive {Port, closed} -> ok end,
+ open_port({spawn, consume_timeslice_drv},
+ [{parallelism, true}]);
+ _ ->
+ process_flag(scheduler, 1),
+ 1 = erlang:system_info(scheduler_id),
+ Port
+ end,
+ count_pp_sched_start(),
+ "enabled" = port_control(Port2, $E, ""),
+ W5 = case SOnl of
+ 1 ->
+ false;
+ _ ->
+ W1= spawn_opt(fun () ->
+ 2 = erlang:system_info(scheduler_id),
+ "sleeped" = port_control(Port2, $S, "")
+ end, [link,{scheduler,2}]),
+ receive after 100 -> ok end,
+ W1
+ end,
+ Proc5 = spawn_opt(fun () ->
+ receive Go -> ok end,
+ 1 = erlang:system_info(scheduler_id),
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}}
+ end, [link,{scheduler,1}]),
+ receive after 100 -> ok end,
+ Proc5 ! Go,
+ wait_procs_exit([W5, Proc5]),
+ wait_command_msgs(Port2, 10),
+ [{Port2, Sprt5}, {Proc5, Sproc5}] = count_pp_sched_stop([Port2, Proc5]),
+ true = in_range(2, Sproc5, 3),
+ true = in_range(7, Sprt5, 20),
+
+ count_pp_sched_start(),
+ "disabled" = port_control(Port2, $D, ""),
+ W6 = case SOnl of
+ 1 ->
+ false;
+ _ ->
+ W2= spawn_opt(fun () ->
+ 2 = erlang:system_info(scheduler_id),
+ "sleeped" = port_control(Port2, $S, "")
+ end, [link,{scheduler,2}]),
+ receive after 100 -> ok end,
+ W2
+ end,
+ Proc6 = spawn_opt(fun () ->
+ receive Go -> ok end,
+ 1 = erlang:system_info(scheduler_id),
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}},
+ Port2 ! {Parent, {command, ""}}
+ end, [link,{scheduler,1}]),
+ receive after 100 -> ok end,
+ Proc6 ! Go,
+ wait_procs_exit([W6, Proc6]),
+ wait_command_msgs(Port2, 10),
+ [{Port2, Sprt6}, {Proc6, Sproc6}] = count_pp_sched_stop([Port2, Proc6]),
+ true = in_range(2, Sproc6, 3),
+ true = in_range(3, Sprt6, 6),
+
+ process_flag(scheduler, 0),
+
+ Port2 ! {self(), close},
+ receive {Port2, closed} -> ok end,
+ ok.
+
+wait_command_msgs(_, 0) ->
+ ok;
+wait_command_msgs(Port, N) ->
+ receive
+ {Port, command} ->
+ wait_command_msgs(Port, N-1)
+ end.
+
+in_range(Low, Val, High) when is_integer(Low),
+ is_integer(Val),
+ is_integer(High),
+ Low =< Val,
+ Val =< High ->
+ true;
+in_range(Low, Val, High) when is_integer(Low),
+ is_integer(Val),
+ is_integer(High) ->
+ false.
+
+count_pp_sched_start() ->
+ erlang:trace(all, true, [running_procs, running_ports, {tracer, self()}]),
+ ok.
+
+count_pp_sched_stop(Ps) ->
+ Td = erlang:trace_delivered(all),
+ erlang:trace(all, false, [running_procs, running_ports, {tracer, self()}]),
+ PNs = lists:map(fun (P) -> {P, 0} end, Ps),
+ receive {trace_delivered, all, Td} -> ok end,
+ Res = count_proc_sched(Ps, PNs),
+ ?t:format("Scheduling counts: ~p~n", [Res]),
+ erlang:display({scheduling_counts, Res}),
+ Res.
+
+do_inc_pn(_P, []) ->
+ throw(undefined);
+do_inc_pn(P, [{P,N}|PNs]) ->
+ [{P,N+1}|PNs];
+do_inc_pn(P, [PN|PNs]) ->
+ [PN|do_inc_pn(P, PNs)].
+
+inc_pn(P, PNs) ->
+ try
+ do_inc_pn(P, PNs)
+ catch
+ throw:undefined -> PNs
+ end.
+
+count_proc_sched(Ps, PNs) ->
+ receive
+ TT when element(1, TT) == trace, element(3, TT) == in ->
+% erlang:display(TT),
+ count_proc_sched(Ps, inc_pn(element(2, TT), PNs));
+ TT when element(1, TT) == trace, element(3, TT) == out ->
+ count_proc_sched(Ps, PNs)
+ after 0 ->
+ PNs
+ end.
+
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Utilities
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%flush_msgs() ->
+% receive
+% M ->
+% erlang:display(M),
+% flush_msgs()
+% after 0 ->
+% ok
+% end.
+
+wait_procs_exit([]) ->
+ ok;
+wait_procs_exit([P|Ps]) when is_pid(P) ->
+ Mon = erlang:monitor(process, P),
+ receive
+ {'DOWN', Mon, process, P, _} ->
+ wait_procs_exit(Ps)
+ end;
+wait_procs_exit([_|Ps]) ->
+ wait_procs_exit(Ps).
+
get_port_msg(Port, Timeout) ->
receive
{Port, What} ->
diff --git a/erts/emulator/test/driver_SUITE_data/Makefile.src b/erts/emulator/test/driver_SUITE_data/Makefile.src
index b667dff6b6..1fedd72200 100644
--- a/erts/emulator/test/driver_SUITE_data/Makefile.src
+++ b/erts/emulator/test/driver_SUITE_data/Makefile.src
@@ -15,7 +15,8 @@ MISC_DRVS = outputv_drv@dll@ \
otp_9302_drv@dll@ \
thr_free_drv@dll@ \
async_blast_drv@dll@ \
- thr_msg_blast_drv@dll@
+ thr_msg_blast_drv@dll@ \
+ consume_timeslice_drv@dll@
SYS_INFO_DRVS = sys_info_base_drv@dll@ \
sys_info_prev_drv@dll@ \
diff --git a/erts/emulator/test/driver_SUITE_data/consume_timeslice_drv.c b/erts/emulator/test/driver_SUITE_data/consume_timeslice_drv.c
new file mode 100644
index 0000000000..6b0c4cf37d
--- /dev/null
+++ b/erts/emulator/test/driver_SUITE_data/consume_timeslice_drv.c
@@ -0,0 +1,172 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2012. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#include "erl_driver.h"
+#ifdef __WIN32__
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+#include <stdio.h>
+#include <string.h>
+
+static void stop(ErlDrvData drv_data);
+static ErlDrvData start(ErlDrvPort port,
+ char *command);
+static void output(ErlDrvData drv_data,
+ char *buf, ErlDrvSizeT len);
+static ErlDrvSSizeT control(ErlDrvData drv_data,
+ unsigned int command,
+ char *buf, ErlDrvSizeT len,
+ char **rbuf, ErlDrvSizeT rlen);
+
+static ErlDrvEntry consume_timeslice_drv_entry = {
+ NULL /* init */,
+ start,
+ stop,
+ output,
+ NULL /* ready_input */,
+ NULL /* ready_output */,
+ "consume_timeslice_drv",
+ NULL /* finish */,
+ NULL /* handle */,
+ control,
+ NULL /* timeout */,
+ NULL /* outputv */,
+ NULL /* ready_async */,
+ NULL /* flush */,
+ NULL /* call */,
+ NULL /* event */,
+ ERL_DRV_EXTENDED_MARKER,
+ ERL_DRV_EXTENDED_MAJOR_VERSION,
+ ERL_DRV_EXTENDED_MINOR_VERSION,
+ ERL_DRV_FLAG_USE_PORT_LOCKING,
+ NULL /* handle2 */,
+ NULL /* handle_monitor */
+};
+
+typedef struct {
+ ErlDrvPort port;
+ ErlDrvTermData tport;
+ ErlDrvTermData cmd_msg[6];
+ int consume_timeslice;
+} consume_timeslice_data_t;
+
+
+DRIVER_INIT(consume_timeslice_drv)
+{
+ return &consume_timeslice_drv_entry;
+}
+
+static void stop(ErlDrvData drv_data)
+{
+ driver_free((void *) drv_data);
+}
+
+static ErlDrvData start(ErlDrvPort port,
+ char *command)
+{
+ consume_timeslice_data_t *ctsd;
+
+ ctsd = driver_alloc(sizeof(consume_timeslice_data_t));
+ if (!ctsd)
+ return ERL_DRV_ERROR_GENERAL;
+
+ ctsd->port = port;
+ ctsd->tport = driver_mk_port(port);
+ ctsd->consume_timeslice = 0;
+
+ ctsd->cmd_msg[0] = ERL_DRV_PORT;
+ ctsd->cmd_msg[1] = ctsd->tport;
+ ctsd->cmd_msg[2] = ERL_DRV_ATOM;
+ ctsd->cmd_msg[3] = driver_mk_atom("command");
+ ctsd->cmd_msg[4] = ERL_DRV_TUPLE;
+ ctsd->cmd_msg[5] = (ErlDrvTermData) 2;
+
+ return (ErlDrvData) ctsd;
+}
+
+static void output(ErlDrvData drv_data,
+ char *buf, ErlDrvSizeT len)
+{
+ consume_timeslice_data_t *ctsd = (consume_timeslice_data_t *) drv_data;
+ int res;
+
+ if (ctsd->consume_timeslice) {
+ int res = erl_drv_consume_timeslice(ctsd->port, 50);
+ if (res < 0) {
+ driver_failure_atom(ctsd->port, "erl_drv_consume_timeslice() failed");
+ return;
+ }
+ }
+
+ res = erl_drv_output_term(ctsd->tport,
+ ctsd->cmd_msg,
+ sizeof(ctsd->cmd_msg)/sizeof(ErlDrvTermData));
+ if (res <= 0) {
+ driver_failure_atom(ctsd->port, "erl_drv_output_term() failed");
+ return;
+ }
+}
+static ErlDrvSSizeT control(ErlDrvData drv_data,
+ unsigned int command,
+ char *buf, ErlDrvSizeT len,
+ char **rbuf, ErlDrvSizeT rlen)
+{
+ consume_timeslice_data_t *ctsd = (consume_timeslice_data_t *) drv_data;
+ int res;
+ char *res_str;
+ ErlDrvSSizeT res_len;
+
+ switch (command) {
+ case 'E':
+ ctsd->consume_timeslice = 1;
+ res_str = "enabled";
+ break;
+ case 'D':
+ ctsd->consume_timeslice = 0;
+ res_str = "disabled";
+ break;
+ case 'S':
+#ifdef __WIN32__
+ Sleep((DWORD) 1000);
+#else
+ sleep(1);
+#endif
+ res_str = "sleeped";
+ break;
+ default:
+ res_str = "what?";
+ break;
+ }
+
+ res_len = strlen(res_str);
+ if (res_len > rlen) {
+ char *abuf = driver_alloc(sizeof(char)*res_len);
+ if (!abuf) {
+ driver_failure_atom(ctsd->port, "driver_alloc() failed");
+ return 0;
+ }
+ *rbuf = abuf;
+ }
+
+ memcpy((void *) *rbuf, (void *) res_str, res_len);
+
+ return res_len;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 13:48:48 +0000