From patchwork Tue Nov 5 16:58:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 2007019 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=KOBL3agW; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4XjZRd6Qk0z1xyM for ; Wed, 6 Nov 2024 04:03:41 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t8Mwz-0001ni-2x; Tue, 05 Nov 2024 12:02:41 -0500 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 1t8Mww-0001f3-CS for qemu-devel@nongnu.org; Tue, 05 Nov 2024 12:02:39 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t8Mwt-0005si-0j for qemu-devel@nongnu.org; Tue, 05 Nov 2024 12:02:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1730826153; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pcSD8D0A1jUOrgR7TmdU9oL1/rBS5lIAGlGLO3nzwnc=; b=KOBL3agWZuBCnOISfX779uCbzxmmBe+jXftJcNKw+8XiWxQKF7cCCD3ZylK1jMxKKUWDfF GF2MhDc1CQ5CWbCDOaEIlT0CGvWLo6z/kCJaoo1nSCDnqU+2GzAIXBlHsx2MOiVP78Ivuu RgjQXCSEedShDSnQ9oW9+83sqaKLwAk= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-580-qZJRSIKdOXCMCvc0M_hl3A-1; Tue, 05 Nov 2024 11:58:49 -0500 X-MC-Unique: qZJRSIKdOXCMCvc0M_hl3A-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CDA6A1955EE8; Tue, 5 Nov 2024 16:58:48 +0000 (UTC) Received: from corto.redhat.com (unknown [10.39.193.244]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 9FBC9300018D; Tue, 5 Nov 2024 16:58:47 +0000 (UTC) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , "Maciej S. Szmigiero" Subject: [PULL 2/2] vfio/migration: Add vfio_save_block_precopy_empty_hit trace event Date: Tue, 5 Nov 2024 17:58:41 +0100 Message-ID: <20241105165841.3086136-3-clg@redhat.com> In-Reply-To: <20241105165841.3086136-1-clg@redhat.com> References: <20241105165841.3086136-1-clg@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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=-0.34, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, 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 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: "Maciej S. Szmigiero" This way it is clearly known when there's no more data to send for that device. Signed-off-by: Maciej S. Szmigiero --- include/hw/vfio/vfio-common.h | 1 + hw/vfio/migration.c | 8 ++++++++ hw/vfio/trace-events | 1 + 3 files changed, 10 insertions(+) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 282eadf4ebf5a27a3f7168868fbc2a20d94252c0..e0ce6ec3a9b3245e36811a3383f1d642c5536f3d 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -75,6 +75,7 @@ typedef struct VFIOMigration { bool initial_data_sent; bool event_save_iterate_started; + bool event_precopy_empty_hit; } VFIOMigration; struct VFIOGroup; diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 87ddc210578f4ecbaf30fa5d8816ce182cbcbcb0..01aa11013e42b06696e6af28068f8048d5bfe29a 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -370,6 +370,10 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) * please refer to the Linux kernel VFIO uAPI. */ if (errno == ENOMSG) { + if (!migration->event_precopy_empty_hit) { + trace_vfio_save_block_precopy_empty_hit(migration->vbasedev->name); + migration->event_precopy_empty_hit = true; + } return 0; } @@ -379,6 +383,9 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) return 0; } + /* Non-empty read: re-arm the trace event */ + migration->event_precopy_empty_hit = false; + qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE); qemu_put_be64(f, data_size); qemu_put_buffer(f, migration->data_buffer, data_size); @@ -473,6 +480,7 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp) } migration->event_save_iterate_started = false; + migration->event_precopy_empty_hit = false; if (vfio_precopy_supported(vbasedev)) { switch (migration->device_state) { diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 032a51a10592fdab3dd9b2be6506d034275678e7..cab1cf1de0a2955efbcf4390d6881fa628eb3f14 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -157,6 +157,7 @@ vfio_migration_set_device_state(const char *name, const char *state) " (%s) stat vfio_migration_set_state(const char *name, const char *new_state, const char *recover_state) " (%s) new state %s, recover state %s" 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_block_precopy_empty_hit(const char *name) " (%s)" vfio_save_cleanup(const char *name) " (%s)" vfio_save_complete_precopy(const char *name, int ret) " (%s) ret %d" vfio_save_complete_precopy_start(const char *name) " (%s)"