event: adopt static scheduler to the new API

Move current scheduler to it's own module
and make use of new API.

Change-Id: I4928aed82603d51de01194c9650709e814f7f61b
Signed-off-by: Vitaliy Mysak <vitaliy.mysak@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4054
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

include/spdk_internal/event.h

@@ -245,7 +245,7 @@ void _spdk_scheduler_period_set(uint32_t period);
 #define SPDK_SCHEDULER_REGISTER(scheduler) \
 static void __attribute__((constructor)) _spdk_scheduler_register_##name(void) \
 { \
-	spdk_scheduler_list_add(scheduler); \
+	_spdk_scheduler_list_add(scheduler); \
 } \
 
 /**

lib/event/Makefile

@@ -39,7 +39,7 @@ SO_MINOR := 0
 
 LIBNAME = event
 C_SRCS = app.c reactor.c rpc.c subsystem.c json_config.c log_rpc.c \
-	 app_rpc.c subsystem_rpc.c
+	 app_rpc.c subsystem_rpc.c scheduler_static.c
 
 SPDK_MAP_FILE = $(abspath $(CURDIR)/spdk_event.map)
 

lib/event/reactor.c

@@ -92,9 +92,14 @@ _spdk_scheduler_set(char *name)
 
 	scheduler = _scheduler_find(name);
 	if (scheduler == NULL) {
+		SPDK_ERRLOG("Requested scheduler is missing\n");
 		return -ENOENT;
 	}
 
+	if (scheduler->init != NULL) {
+		scheduler->init();
+	}
+
 	g_scheduler = scheduler;
 	return 0;
 }
@@ -163,6 +168,12 @@ spdk_reactors_init(void)
 	uint32_t i, last_core;
 	char mempool_name[32];
 
+	rc = _spdk_scheduler_set("static");
+	if (rc != 0) {
+		SPDK_ERRLOG("Failed setting up scheduler\n");
+		return rc;
+	}
+
 	snprintf(mempool_name, sizeof(mempool_name), "evtpool_%d", getpid());
 	g_spdk_event_mempool = spdk_mempool_create(mempool_name,
 			       262144 - 1, /* Power of 2 minus 1 is optimal for memory consumption */
@@ -210,6 +221,10 @@ spdk_reactors_fini(void)
 		return;
 	}
 
+	if (g_scheduler->deinit != NULL) {
+		g_scheduler->deinit();
+	}
+
 	spdk_thread_lib_fini();
 
 	SPDK_ENV_FOREACH_CORE(i) {

lib/event/scheduler_static.c

@@ -0,0 +1,48 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "spdk/stdinc.h"
+#include "spdk/likely.h"
+#include "spdk/event.h"
+#include "spdk/log.h"
+#include "spdk/env.h"
+
+#include "spdk_internal/event.h"
+
+static struct spdk_scheduler scheduler = {
+	.name = "static",
+	.init = NULL,
+	.deinit = NULL,
+	.balance = NULL,
+};
+SPDK_SCHEDULER_REGISTER(&scheduler);

test/unit/lib/event/reactor.c/reactor_ut.c

@@ -37,6 +37,7 @@
 #include "common/lib/test_env.c"
 #include "event/reactor.c"
 #include "spdk_internal/thread.h"
+#include "event/scheduler_static.c"
 
 static void
 test_create_reactor(void)