{"id":2225307,"url":"http://patchwork.ozlabs.org/api/patches/2225307/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420200339.708640-23-vsementsov@yandex-team.ru/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260420200339.708640-23-vsementsov@yandex-team.ru>","list_archive_url":null,"date":"2026-04-20T20:03:37","name":"[v6,22/22] vhost: add some useful trace-points","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"1e2db32080baf809c2352e2d85b78644f1486fc8","submitter":{"id":84116,"url":"http://patchwork.ozlabs.org/api/people/84116/?format=json","name":"Vladimir Sementsov-Ogievskiy","email":"vsementsov@yandex-team.ru"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420200339.708640-23-vsementsov@yandex-team.ru/mbox/","series":[{"id":500672,"url":"http://patchwork.ozlabs.org/api/series/500672/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500672","date":"2026-04-20T20:03:18","name":"vhost refactoring and fixes","version":6,"mbox":"http://patchwork.ozlabs.org/series/500672/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225307/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225307/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=yandex-team.ru header.i=@yandex-team.ru\n header.a=rsa-sha256 header.s=default header.b=OsBuvADr;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Mon, 20 Apr 2026 16:04:39 -0400","from mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net\n (mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net\n [IPv6:2a02:6b8:c42:94a9:0:640:a3fa:0])\n by forwardcorp1d.mail.yandex.net (Yandex) with ESMTPS id 261FD80663;\n Mon, 20 Apr 2026 23:04:25 +0300 (MSK)","from vsementsov-lin (unknown [2a02:6bf:8080:54b::1:34])\n by mail-nwsmtp-smtp-corp-main-68.klg.yp-c.yandex.net (smtpcorp) with ESMTPSA\n id f3YMX10K1Sw0-FCTIqPKv; Mon, 20 Apr 2026 23:04:24 +0300"],"Precedence":"bulk","X-Yandex-Fwd":"1","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru;\n s=default; t=1776715464;\n bh=cHNUGQYHpBInLb95ZLOID6Q1Am1IdFzgTlHbpH702Ng=;\n h=Message-ID:Date:In-Reply-To:Cc:Subject:References:To:From;\n b=OsBuvADris3zqqRHIH3z73AvSRZgrGE4rY+d5p0L0zkbOTEbObwJ5WJItzQ7x/9Gd\n DtAPLZ52AUOeuF677k9CTnaf83tLawf0NOxVgTSTCKVbCb+f63qkDSCdZ2cJcW3cK9\n kE8Cu5pfhviLU3MOga/tHV7pgHoDGOPxdb1+BhIY=","From":"Vladimir Sementsov-Ogievskiy ","To":"mst@redhat.com","Cc":"sgarzare@redhat.com, raphael@enfabrica.net, qemu-devel@nongnu.org,\n vsementsov@yandex-team.ru, yc-core@yandex-team.ru,\n d-tatianin@yandex-team.ru, Raphael Norwitz ","Subject":"[PATCH v6 22/22] vhost: add some useful trace-points","Date":"Mon, 20 Apr 2026 23:03:37 +0300","Message-ID":"<20260420200339.708640-23-vsementsov@yandex-team.ru>","X-Mailer":"git-send-email 2.52.0","In-Reply-To":"<20260420200339.708640-1-vsementsov@yandex-team.ru>","References":"<20260420200339.708640-1-vsementsov@yandex-team.ru>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=178.154.239.200;\n envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1d.mail.yandex.net","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Signed-off-by: Vladimir Sementsov-Ogievskiy \nReviewed-by: Daniil Tatianin \nReviewed-by: Raphael Norwitz \n---\n hw/virtio/trace-events | 12 ++++++++++--\n hw/virtio/vhost.c | 20 ++++++++++++++++++--\n 2 files changed, 28 insertions(+), 4 deletions(-)","diff":"diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events\nindex aa1ffa5e949..2a57edc21e3 100644\n--- a/hw/virtio/trace-events\n+++ b/hw/virtio/trace-events\n@@ -9,8 +9,16 @@ vhost_section(const char *name) \"%s\"\n vhost_reject_section(const char *name, int d) \"%s:%d\"\n vhost_iotlb_miss(void *dev, int step) \"%p step %d\"\n vhost_dev_cleanup(void *dev) \"%p\"\n-vhost_dev_start(void *dev, const char *name, bool vrings) \"%p:%s vrings:%d\"\n-vhost_dev_stop(void *dev, const char *name, bool vrings) \"%p:%s vrings:%d\"\n+vhost_dev_start_in(void *dev, const char *name, bool vrings) \"%p:%s vrings:%d\"\n+vhost_dev_start_out(void *dev, const char *name) \"%p:%s\"\n+vhost_dev_stop_in(void *dev, const char *name, bool vrings) \"%p:%s vrings:%d\"\n+vhost_dev_stop_out(void *dev, const char *name) \"%p:%s\"\n+vhost_virtqueue_start_in(void *dev, const char *name, int idx) \"%p:%s %d\"\n+vhost_virtqueue_start_out(void *dev, const char *name, int idx) \"%p:%s %d\"\n+vhost_virtqueue_stop_in(void *dev, const char *name, int idx) \"%p:%s %d\"\n+vhost_virtqueue_stop_out(void *dev, const char *name, int idx) \"%p:%s %d\"\n+vhost_dev_init_in(void *dev) \"%p\"\n+vhost_dev_init_out(void *dev) \"%p\"\n \n \n # vhost-user.c\ndiff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c\nindex 93c6a5f5e9a..c610007e812 100644\n--- a/hw/virtio/vhost.c\n+++ b/hw/virtio/vhost.c\n@@ -1337,6 +1337,8 @@ int vhost_virtqueue_start(struct vhost_dev *dev,\n };\n struct VirtQueue *vvq = virtio_get_queue(vdev, idx);\n \n+ trace_vhost_virtqueue_start_in(dev, vdev->name, idx);\n+\n r = vhost_vrings_map(dev, vdev, vq, idx);\n if (r <= 0) {\n return r;\n@@ -1397,6 +1399,8 @@ int vhost_virtqueue_start(struct vhost_dev *dev,\n }\n }\n \n+ trace_vhost_virtqueue_start_out(dev, vdev->name, idx);\n+\n return 0;\n \n fail:\n@@ -1415,6 +1419,8 @@ static int do_vhost_virtqueue_stop(struct vhost_dev *dev,\n };\n int r = 0;\n \n+ trace_vhost_virtqueue_stop_in(dev, vdev->name, idx);\n+\n if (virtio_queue_get_desc_addr(vdev, idx) == 0) {\n /* Don't stop the virtqueue which might have not been started */\n return 0;\n@@ -1448,6 +1454,8 @@ static int do_vhost_virtqueue_stop(struct vhost_dev *dev,\n }\n \n vhost_vrings_unmap(dev, vq, true);\n+\n+ trace_vhost_virtqueue_stop_out(dev, vdev->name, idx);\n return r;\n }\n \n@@ -1581,6 +1589,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,\n unsigned int used, reserved, limit;\n int i, r, n_initialized_vqs = 0;\n \n+ trace_vhost_dev_init_in(hdev);\n+\n hdev->vdev = NULL;\n hdev->migration_blocker = NULL;\n \n@@ -1694,6 +1704,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,\n goto fail;\n }\n \n+ trace_vhost_dev_init_out(hdev);\n+\n return 0;\n \n fail:\n@@ -2098,7 +2110,7 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev, bool vrings)\n /* should only be called after backend is connected */\n assert(hdev->vhost_ops);\n \n- trace_vhost_dev_start(hdev, vdev->name, vrings);\n+ trace_vhost_dev_start_in(hdev, vdev->name, vrings);\n \n vdev->vhost_started = true;\n hdev->started = true;\n@@ -2183,6 +2195,8 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev, bool vrings)\n }\n }\n vhost_start_config_intr(hdev);\n+\n+ trace_vhost_dev_start_out(hdev, vdev->name);\n return 0;\n fail_iotlb:\n if (vhost_dev_has_iommu(hdev) &&\n@@ -2232,7 +2246,7 @@ static int do_vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev,\n event_notifier_cleanup(\n &hdev->vqs[VHOST_QUEUE_NUM_CONFIG_INR].masked_config_notifier);\n \n- trace_vhost_dev_stop(hdev, vdev->name, vrings);\n+ trace_vhost_dev_stop_in(hdev, vdev->name, vrings);\n \n if (hdev->vhost_ops->vhost_dev_start) {\n hdev->vhost_ops->vhost_dev_start(hdev, false);\n@@ -2262,6 +2276,8 @@ static int do_vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev,\n hdev->started = false;\n vdev->vhost_started = false;\n hdev->vdev = NULL;\n+\n+ trace_vhost_dev_stop_out(hdev, vdev->name);\n return rc;\n }\n \n","prefixes":["v6","22/22"]}