From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56477) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cnPLH-0004Mv-WE for qemu-devel@nongnu.org; Mon, 13 Mar 2017 08:44:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cnPLG-0005uU-Ov for qemu-devel@nongnu.org; Mon, 13 Mar 2017 08:44:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33564) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cnPLG-0005u6-Go for qemu-devel@nongnu.org; Mon, 13 Mar 2017 08:44:50 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A4CAF61BB9 for ; Mon, 13 Mar 2017 12:44:50 +0000 (UTC) From: Juan Quintela Date: Mon, 13 Mar 2017 13:44:26 +0100 Message-Id: <20170313124434.1043-9-quintela@redhat.com> In-Reply-To: <20170313124434.1043-1-quintela@redhat.com> References: <20170313124434.1043-1-quintela@redhat.com> Subject: [Qemu-devel] [PATCH 08/16] migration: Create multifd migration threads List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: amit.shah@redhat.com, dgilbert@redhat.com Creation of the threads, nothing inside yet. Signed-off-by: Juan Quintela -- Use pointers instead of long array names Move to use semaphores instead of conditions as paolo suggestion Put all the state inside one struct. Use a counter for the number of threads created. Needed during cancellation. Add error return to thread creation Add id field Signed-off-by: Juan Quintela --- include/migration/migration.h | 4 + migration/migration.c | 15 ++++ migration/ram.c | 188 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 207 insertions(+) diff --git a/include/migration/migration.h b/include/migration/migration.h index bacde15..e8b9fcb 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -267,6 +267,10 @@ MigrationState *migrate_get_current(void); int migrate_multifd_threads(void); int migrate_multifd_group(void); +int migrate_multifd_send_threads_create(void); +void migrate_multifd_send_threads_join(void); +int migrate_multifd_recv_threads_create(void); +void migrate_multifd_recv_threads_join(void); void migrate_compress_threads_create(void); void migrate_compress_threads_join(void); diff --git a/migration/migration.c b/migration/migration.c index 4cc45a4..5bbd688 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -348,6 +348,7 @@ static void process_incoming_migration_bh(void *opaque) MIGRATION_STATUS_FAILED); error_report_err(local_err); migrate_decompress_threads_join(); + migrate_multifd_recv_threads_join(); exit(EXIT_FAILURE); } @@ -372,6 +373,7 @@ static void process_incoming_migration_bh(void *opaque) runstate_set(global_state_get_runstate()); } migrate_decompress_threads_join(); + migrate_multifd_recv_threads_join(); /* * This must happen after any state changes since as soon as an external * observer sees this event they might start to prod at the VM assuming @@ -438,6 +440,7 @@ static void process_incoming_migration_co(void *opaque) MIGRATION_STATUS_FAILED); error_report("load of migration failed: %s", strerror(-ret)); migrate_decompress_threads_join(); + migrate_multifd_recv_threads_join(); exit(EXIT_FAILURE); } @@ -450,6 +453,11 @@ void migration_fd_process_incoming(QEMUFile *f) Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, f); migrate_decompress_threads_create(); + if (migrate_multifd_recv_threads_create() != 0) { + /* We haven't been able to create multifd threads + nothing better to do */ + exit(EXIT_FAILURE); + } qemu_file_set_blocking(f, false); qemu_coroutine_enter(co); } @@ -983,6 +991,7 @@ static void migrate_fd_cleanup(void *opaque) qemu_mutex_lock_iothread(); migrate_compress_threads_join(); + migrate_multifd_send_threads_join(); qemu_fclose(s->to_dst_file); s->to_dst_file = NULL; } @@ -2144,6 +2153,12 @@ void migrate_fd_connect(MigrationState *s) } migrate_compress_threads_create(); + if (migrate_multifd_send_threads_create() != 0) { + migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, + MIGRATION_STATUS_FAILED); + migrate_fd_cleanup(s); + return; + } qemu_thread_create(&s->thread, "live_migration", migration_thread, s, QEMU_THREAD_JOINABLE); s->migration_thread_running = true; diff --git a/migration/ram.c b/migration/ram.c index aa51dbd..ee32fa8 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -382,6 +382,194 @@ void migrate_compress_threads_create(void) } } +/* Multiple fd's */ + +struct MultiFDSendParams { + int id; + QemuThread thread; + QemuSemaphore sem; + QemuMutex mutex; + bool quit; +}; +typedef struct MultiFDSendParams MultiFDSendParams; + +struct { + MultiFDSendParams *params; + /* number o6 created threads */ + int count; +} *multifd_send_state; + +static void terminate_multifd_send_threads(void) +{ + int i; + + for (i = 0; i < multifd_send_state->count; i++) { + MultiFDSendParams *p = &multifd_send_state->params[i]; + + qemu_mutex_lock(&p->mutex); + p->quit = true; + qemu_sem_post(&p->sem); + qemu_mutex_unlock(&p->mutex); + } +} + +void migrate_multifd_send_threads_join(void) +{ + int i; + + if (!migrate_use_multifd()) { + return; + } + terminate_multifd_send_threads(); + for (i = 0; i < multifd_send_state->count; i++) { + MultiFDSendParams *p = &multifd_send_state->params[i]; + + qemu_thread_join(&p->thread); + qemu_mutex_destroy(&p->mutex); + qemu_sem_destroy(&p->sem); + } + g_free(multifd_send_state->params); + multifd_send_state->params = NULL; + g_free(multifd_send_state); + multifd_send_state = NULL; +} + +static void *multifd_send_thread(void *opaque) +{ + MultiFDSendParams *p = opaque; + + while (true) { + qemu_mutex_lock(&p->mutex); + if (p->quit) { + qemu_mutex_unlock(&p->mutex); + break; + } + qemu_mutex_unlock(&p->mutex); + qemu_sem_wait(&p->sem); + } + + return NULL; +} + +int migrate_multifd_send_threads_create(void) +{ + int i, thread_count; + + if (!migrate_use_multifd()) { + return 0; + } + thread_count = migrate_multifd_threads(); + multifd_send_state = g_malloc0(sizeof(*multifd_send_state)); + multifd_send_state->params = g_new0(MultiFDSendParams, thread_count); + multifd_send_state->count = 0; + for (i = 0; i < thread_count; i++) { + char thread_name[15]; + MultiFDSendParams *p = &multifd_send_state->params[i]; + + qemu_mutex_init(&p->mutex); + qemu_sem_init(&p->sem, 0); + p->quit = false; + p->id = i; + snprintf(thread_name, 15, "multifd_send_%d", i); + qemu_thread_create(&p->thread, thread_name, multifd_send_thread, p, + QEMU_THREAD_JOINABLE); + multifd_send_state->count++; + } + return 0; +} + +struct MultiFDRecvParams { + int id; + QemuThread thread; + QemuSemaphore sem; + QemuMutex mutex; + bool quit; +}; +typedef struct MultiFDRecvParams MultiFDRecvParams; + +struct { + MultiFDRecvParams *params; + /* number o6 created threads */ + int count; +} *multifd_recv_state; + +static void terminate_multifd_recv_threads(void) +{ + int i; + + for (i = 0; i < multifd_recv_state->count; i++) { + MultiFDRecvParams *p = &multifd_recv_state->params[i]; + + qemu_mutex_lock(&p->mutex); + p->quit = true; + qemu_sem_post(&p->sem); + qemu_mutex_unlock(&p->mutex); + } +} + +void migrate_multifd_recv_threads_join(void) +{ + int i; + + if (!migrate_use_multifd()) { + return; + } + terminate_multifd_recv_threads(); + for (i = 0; i < multifd_recv_state->count; i++) { + MultiFDRecvParams *p = &multifd_recv_state->params[i]; + + qemu_thread_join(&p->thread); + qemu_mutex_destroy(&p->mutex); + qemu_sem_destroy(&p->sem); + } + g_free(multifd_recv_state->params); + multifd_recv_state->params = NULL; + g_free(multifd_recv_state); + multifd_recv_state = NULL; +} + +static void *multifd_recv_thread(void *opaque) +{ + MultiFDRecvParams *p = opaque; + + while (true) { + qemu_mutex_lock(&p->mutex); + if (p->quit) { + qemu_mutex_unlock(&p->mutex); + break; + } + qemu_mutex_unlock(&p->mutex); + qemu_sem_wait(&p->sem); + } + + return NULL; +} + +int migrate_multifd_recv_threads_create(void) +{ + int i, thread_count; + + if (!migrate_use_multifd()) { + return 0; + } + thread_count = migrate_multifd_threads(); + multifd_recv_state = g_malloc0(sizeof(*multifd_recv_state)); + multifd_recv_state->params = g_new0(MultiFDRecvParams, thread_count); + multifd_recv_state->count = 0; + for (i = 0; i < thread_count; i++) { + MultiFDRecvParams *p = &multifd_recv_state->params[i]; + + qemu_mutex_init(&p->mutex); + qemu_sem_init(&p->sem, 0); + p->quit = false; + p->id = i; + qemu_thread_create(&p->thread, "multifd_recv", multifd_recv_thread, p, + QEMU_THREAD_JOINABLE); + multifd_recv_state->count++; + } + return 0; +} + /** * save_page_header: Write page header to wire * -- 2.9.3