From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A580F2D6E53 for ; Mon, 20 Oct 2025 07:10:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760944220; cv=none; b=ZTd8p9rhPQFuUu6jbchZgLZqvG+kB1/1FKN+CdpSCzKzbL++bB2N0ARwZIO52Ww7NrOe4BpwIJmL51fe9dbmb01hELCIvKGFHykYSm8nYOI6s/HB+2Z6YWzPyf+iF4ppDddD7IS7QK5OB8xZY0oHA9eygPUHZJZQ/WGwJ3e0V0Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760944220; c=relaxed/simple; bh=KOU9GyDaASWKisx8BmLM99cBgeucuzjzt0jChLtWuNw=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=bnZ6fFPbBGP4l/KuesSap9ho0rdskLLKq3BHUCYkGcvV5efhaA5AzPSzsPZ19/TyKIRwdQVS+dZoH89kPwLAXpb4diyeFNEehGemdcArOx7Ab69JQDOD+iyZ91Iz13e3qEJOCjxeB3fA94fxUAk+bVtwE2wt0rIrmJ7hEg6+944= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=K+SXB1Tg; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="K+SXB1Tg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1760944217; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=hJbazs23YnXcdtzatFb21nkxkEatw0SF03fWxtNheFs=; b=K+SXB1Tg1NFtdvQz8Yr54Y3au7Nn3L7o/AdyW/lBjSpzEB/dBcR1cSNw14pfkXqu3Nm6fO K+rpdEgr32lNdmlBmTaVsITTUbE00rdVlAmdRWPQMg2X43XGAe/JiApR23JiSf0MbYNlqY LJpP2HfM7FwyiBWVV2jueQC6pNQWmAk= Received: from mx-prod-mc-01.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-680-JVnNU5PBPJunJIjy0olk-g-1; Mon, 20 Oct 2025 03:10:14 -0400 X-MC-Unique: JVnNU5PBPJunJIjy0olk-g-1 X-Mimecast-MFC-AGG-ID: JVnNU5PBPJunJIjy0olk-g_1760944213 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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0250F1956089; Mon, 20 Oct 2025 07:10:13 +0000 (UTC) Received: from localhost.localdomain (unknown [10.72.113.29]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 1C90530001A2; Mon, 20 Oct 2025 07:10:09 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH V8 00/19] virtio_ring in order support Date: Mon, 20 Oct 2025 15:09:44 +0800 Message-ID: <20251020071003.28834-1-jasowang@redhat.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Hello all: This sereis tries to implement the VIRTIO_F_IN_ORDER to virtio_ring. This is done by introducing virtqueue ops so we can implement separate helpers for different virtqueue layout/features then the in-order were implemented on top. Tests shows 2%-19% imporvment with packed virtqueue PPS with KVM guest vhost-net/testpmd on the host. Changes since v7: - Rebase on vhost.git linux-next branch - Tweak the comment to explain the usage of free_head Changes since V6: - Rebase on vhost.git linux-next branch - Fix poking packed virtqueue in more_used_split_in_order() - Fix calling detach_buf_packed_in_order() unconditonally in virtqueue_detach_unused_buf_packed() - Typo and indentation fixes - Fix wrong changelog of patch 7 Changes since V5: - rebase on vhost.git linux-next branch - reorder the total_len to reduce memory comsuming Changes since V4: - Fix build error when DEBUG is enabled - Fix function duplications - Remove unnecessary new lines Changes since V3: - Re-benchmark with the recent vhost-net in order support - Rename the batched used id and length - Other minor tweaks Changes since V2: - Fix build warning when DEBUG is enabled Changes since V1: - use const global array of function pointers to avoid indirect branches to eliminate retpoline when mitigation is enabled - fix used length calculation when processing used ids in a batch - fix sparse warnings Jason Wang (19): virtio_ring: rename virtqueue_reinit_xxx to virtqueue_reset_xxx() virtio_ring: switch to use vring_virtqueue in virtqueue_poll variants virtio_ring: unify logic of virtqueue_poll() and more_used() virtio_ring: switch to use vring_virtqueue for virtqueue resize variants virtio_ring: switch to use vring_virtqueue for virtqueue_kick_prepare variants virtio_ring: switch to use vring_virtqueue for virtqueue_add variants virtio: switch to use vring_virtqueue for virtqueue_get variants virtio_ring: switch to use vring_virtqueue for enable_cb_prepare variants virtio_ring: use vring_virtqueue for enable_cb_delayed variants virtio_ring: switch to use vring_virtqueue for disable_cb variants virtio_ring: switch to use vring_virtqueue for detach_unused_buf variants virtio_ring: switch to use unsigned int for virtqueue_poll_packed() virtio_ring: introduce virtqueue ops virtio_ring: determine descriptor flags at one time virtio_ring: factor out core logic of buffer detaching virtio_ring: factor out core logic for updating last_used_idx virtio_ring: factor out split indirect detaching logic virtio_ring: factor out split detaching logic virtio_ring: add in order support drivers/virtio/virtio_ring.c | 905 ++++++++++++++++++++++++++--------- 1 file changed, 692 insertions(+), 213 deletions(-) -- 2.31.1