From patchwork Tue Oct 29 14:58:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Maciej S. Szmigiero" X-Patchwork-Id: 13854998 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D3285D3A66B for ; Tue, 29 Oct 2024 15:00:32 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t5ngP-0006E8-HI; Tue, 29 Oct 2024 10:58:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5ngM-0006Bw-6r for qemu-devel@nongnu.org; Tue, 29 Oct 2024 10:58:54 -0400 Received: from vps-ovh.mhejs.net ([145.239.82.108]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5ngJ-0004ey-Fs for qemu-devel@nongnu.org; Tue, 29 Oct 2024 10:58:53 -0400 Received: from MUA by vps-ovh.mhejs.net with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.98) (envelope-from ) id 1t5nfv-000000014CZ-38fu; Tue, 29 Oct 2024 15:58:27 +0100 From: "Maciej S. Szmigiero" To: Peter Xu , Fabiano Rosas Cc: Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= , Eric Blake , Markus Armbruster , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Avihai Horon , Joao Martins , qemu-devel@nongnu.org Subject: [PATCH 1/4] vfio/migration: Add save_{iterate, complete_precopy}_started trace events Date: Tue, 29 Oct 2024 15:58:13 +0100 Message-ID: <68f51cf0eb3daf448ae80219dded4b10984e32db.1730203967.git.maciej.szmigiero@oracle.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: none client-ip=145.239.82.108; envelope-from=mhej@vps-ovh.mhejs.net; helo=vps-ovh.mhejs.net X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: "Maciej S. Szmigiero" This way both the start and end points of migrating a particular VFIO device are known. Add also a vfio_save_iterate_empty_hit trace event so it is known when there's no more data to send for that device. Signed-off-by: Maciej S. Szmigiero --- hw/vfio/migration.c | 13 +++++++++++++ hw/vfio/trace-events | 3 +++ include/hw/vfio/vfio-common.h | 3 +++ 3 files changed, 19 insertions(+) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 992dc3b10257..1b1ddf527d69 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -472,6 +472,9 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp) return -ENOMEM; } + migration->save_iterate_started = false; + migration->save_iterate_empty_hit = false; + if (vfio_precopy_supported(vbasedev)) { switch (migration->device_state) { case VFIO_DEVICE_STATE_RUNNING: @@ -602,9 +605,17 @@ static int vfio_save_iterate(QEMUFile *f, void *opaque) VFIOMigration *migration = vbasedev->migration; ssize_t data_size; + if (!migration->save_iterate_started) { + trace_vfio_save_iterate_started(vbasedev->name); + migration->save_iterate_started = true; + } + data_size = vfio_save_block(f, migration); if (data_size < 0) { return data_size; + } else if (data_size == 0 && !migration->save_iterate_empty_hit) { + trace_vfio_save_iterate_empty_hit(vbasedev->name); + migration->save_iterate_empty_hit = true; } vfio_update_estimated_pending_data(migration, data_size); @@ -630,6 +641,8 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) int ret; Error *local_err = NULL; + trace_vfio_save_complete_precopy_started(vbasedev->name); + /* We reach here with device state STOP or STOP_COPY only */ ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP_COPY, VFIO_DEVICE_STATE_STOP, &local_err); diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 29789e8d276d..e58deab232ed 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -159,8 +159,11 @@ vfio_migration_state_notifier(const char *name, int state) " (%s) state %d" vfio_save_block(const char *name, int data_size) " (%s) data_size %d" vfio_save_cleanup(const char *name) " (%s)" vfio_save_complete_precopy(const char *name, int ret) " (%s) ret %d" +vfio_save_complete_precopy_started(const char *name) " (%s)" vfio_save_device_config_state(const char *name) " (%s)" vfio_save_iterate(const char *name, uint64_t precopy_init_size, uint64_t precopy_dirty_size) " (%s) precopy initial size %"PRIu64" precopy dirty size %"PRIu64 +vfio_save_iterate_empty_hit(const char *name) " (%s)" +vfio_save_iterate_started(const char *name) " (%s)" vfio_save_setup(const char *name, uint64_t data_buffer_size) " (%s) data buffer size %"PRIu64 vfio_state_pending_estimate(const char *name, uint64_t precopy, uint64_t postcopy, uint64_t precopy_init_size, uint64_t precopy_dirty_size) " (%s) precopy %"PRIu64" postcopy %"PRIu64" precopy initial size %"PRIu64" precopy dirty size %"PRIu64 vfio_state_pending_exact(const char *name, uint64_t precopy, uint64_t postcopy, uint64_t stopcopy_size, uint64_t precopy_init_size, uint64_t precopy_dirty_size) " (%s) precopy %"PRIu64" postcopy %"PRIu64" stopcopy size %"PRIu64" precopy initial size %"PRIu64" precopy dirty size %"PRIu64 diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index fed499b199f0..997ee5af2d5b 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -73,6 +73,9 @@ typedef struct VFIOMigration { uint64_t precopy_init_size; uint64_t precopy_dirty_size; bool initial_data_sent; + + bool save_iterate_started; + bool save_iterate_empty_hit; } VFIOMigration; struct VFIOGroup;