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Fri, 21 Aug 2020 10:13:07 +0000 (UTC) Received: from localhost (ovpn-113-166.ams2.redhat.com [10.36.113.166]) by smtp.corp.redhat.com (Postfix) with ESMTP id 60EB37E318; Fri, 21 Aug 2020 10:13:04 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH 2/2] tests: add test-fdmon-epoll Date: Fri, 21 Aug 2020 11:12:52 +0100 Message-Id: <20200821101252.203056-3-stefanha@redhat.com> In-Reply-To: <20200821101252.203056-1-stefanha@redhat.com> References: <20200821101252.203056-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.120; envelope-from=stefanha@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/20 23:41:39 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MIME_BASE64_TEXT=1.741, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fam Zheng , qemu-block@nongnu.org, qemu-stable@nongnu.org, Stefan Hajnoczi Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Test aio_disable_external(), which switches from fdmon-epoll back to fdmon-poll. This resulted in an assertion failure that was fixed in the previous patch. Signed-off-by: Stefan Hajnoczi --- MAINTAINERS | 1 + tests/Makefile.include | 4 +++ tests/test-fdmon-epoll.c | 73 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 78 insertions(+) create mode 100644 tests/test-fdmon-epoll.c diff --git a/MAINTAINERS b/MAINTAINERS index 0886eb3d2b..6d2e99b94f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2109,6 +2109,7 @@ F: migration/block* F: include/block/aio.h F: include/block/aio-wait.h F: scripts/qemugdb/aio.py +F: tests/test-fdmon-epoll.c T: git https://github.com/stefanha/qemu.git block Block SCSI subsystem diff --git a/tests/Makefile.include b/tests/Makefile.include index c7e4646ded..b785e487b7 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -78,6 +78,9 @@ check-unit-$(CONFIG_SOFTMMU) += tests/test-iov$(EXESUF) check-unit-y += tests/test-bitmap$(EXESUF) check-unit-$(CONFIG_BLOCK) += tests/test-aio$(EXESUF) check-unit-$(CONFIG_BLOCK) += tests/test-aio-multithread$(EXESUF) +ifeq ($(CONFIG_EPOLL_CREATE1),y) +check-unit-$(CONFIG_BLOCK) += tests/test-fdmon-epoll$(EXESUF) +endif check-unit-$(CONFIG_BLOCK) += tests/test-throttle$(EXESUF) check-unit-$(CONFIG_BLOCK) += tests/test-thread-pool$(EXESUF) check-unit-$(CONFIG_BLOCK) += tests/test-hbitmap$(EXESUF) @@ -408,6 +411,7 @@ tests/test-char$(EXESUF): tests/test-char.o $(test-util-obj-y) $(test-io-obj-y) tests/test-coroutine$(EXESUF): tests/test-coroutine.o $(test-block-obj-y) tests/test-aio$(EXESUF): tests/test-aio.o $(test-block-obj-y) tests/test-aio-multithread$(EXESUF): tests/test-aio-multithread.o $(test-block-obj-y) +tests/test-fdmon-epoll$(EXESUF): tests/test-fdmon-epoll.o $(test-block-obj-y) tests/test-throttle$(EXESUF): tests/test-throttle.o $(test-block-obj-y) tests/test-bdrv-drain$(EXESUF): tests/test-bdrv-drain.o $(test-block-obj-y) $(test-util-obj-y) tests/test-bdrv-graph-mod$(EXESUF): tests/test-bdrv-graph-mod.o $(test-block-obj-y) $(test-util-obj-y) diff --git a/tests/test-fdmon-epoll.c b/tests/test-fdmon-epoll.c new file mode 100644 index 0000000000..11fd8a2fa9 --- /dev/null +++ b/tests/test-fdmon-epoll.c @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * fdmon-epoll tests + * + * Copyright (c) 2020 Red Hat, Inc. + */ + +#include "qemu/osdep.h" +#include "block/aio.h" +#include "qapi/error.h" +#include "qemu/main-loop.h" + +static AioContext *ctx; + +static void dummy_fd_handler(EventNotifier *notifier) +{ + event_notifier_test_and_clear(notifier); +} + +static void add_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + event_notifier_init(¬ifiers[i], false); + aio_set_event_notifier(ctx, ¬ifiers[i], false, + dummy_fd_handler, NULL); + } +} + +static void remove_event_notifiers(EventNotifier *notifiers, size_t n) +{ + for (size_t i = 0; i < n; i++) { + aio_set_event_notifier(ctx, ¬ifiers[i], false, NULL, NULL); + event_notifier_cleanup(¬ifiers[i]); + } +} + +/* Check that fd handlers work when external clients are disabled */ +static void test_external_disabled(void) +{ + EventNotifier notifiers[100]; + + /* fdmon-epoll is only enabled when many fd handlers are registered */ + add_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); + + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + + aio_disable_external(ctx); + event_notifier_set(¬ifiers[0]); + assert(aio_poll(ctx, true)); + aio_enable_external(ctx); + + remove_event_notifiers(notifiers, G_N_ELEMENTS(notifiers)); +} + +int main(int argc, char **argv) +{ + /* + * This code relies on the fact that fdmon-io_uring disables itself when + * the glib main loop is in use. The main loop uses fdmon-poll and upgrades + * to fdmon-epoll when the number of fds exceeds a threshold. + */ + qemu_init_main_loop(&error_fatal); + ctx = qemu_get_aio_context(); + + while (g_main_context_iteration(NULL, false)) { + /* Do nothing */ + } + + g_test_init(&argc, &argv, NULL); + g_test_add_func("/fdmon-epoll/external-disabled", test_external_disabled); + return g_test_run(); +}