From patchwork Wed May 27 10:29:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 11572559 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8167514B7 for ; Wed, 27 May 2020 10:30:45 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 484C220C09 for ; Wed, 27 May 2020 10:30:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bE6Km2X8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 484C220C09 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:38376 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jdtKe-0000Sh-AV for patchwork-qemu-devel@patchwork.kernel.org; Wed, 27 May 2020 06:30:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55886) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jdtJp-0007E3-LC for qemu-devel@nongnu.org; Wed, 27 May 2020 06:29:53 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:49143 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jdtJo-00015H-Il for qemu-devel@nongnu.org; Wed, 27 May 2020 06:29:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1590575391; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=usjgcK4ieh7qbqDCCOkh8ZUC9u7x9zQVwUy7FgggqbY=; b=bE6Km2X8CJwcIBMrx6mEbc15N/TpkXRPTemSHXo9Ypi1k5JZ1GU5DpVguNV/TuBg5ff0Iy 3440DO2uDll5+Y6RgE5T1ZMStshagQbDblqfyVbr6ljHgE3QHNoe7wak3jFUFPnpgNea/k 6LihfEAMg0AHfaF3e5WenbcMevCGY84= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-190-Mj0Xbs-EOoW_Rym1Q6MyYQ-1; Wed, 27 May 2020 06:29:50 -0400 X-MC-Unique: Mj0Xbs-EOoW_Rym1Q6MyYQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0730383DB38; Wed, 27 May 2020 10:29:49 +0000 (UTC) Received: from localhost (ovpn-114-250.ams2.redhat.com [10.36.114.250]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0D91B5D9E5; Wed, 27 May 2020 10:29:42 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v4 3/5] virtio-scsi: default num_queues to -smp N Date: Wed, 27 May 2020 11:29:23 +0100 Message-Id: <20200527102925.128013-4-stefanha@redhat.com> In-Reply-To: <20200527102925.128013-1-stefanha@redhat.com> References: <20200527102925.128013-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/27 05:46:19 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, 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=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: Kevin Wolf , Pankaj Gupta , Eduardo Habkost , qemu-block@nongnu.org, "Michael S. Tsirkin" , cohuck@redhat.com, Max Reitz , Stefan Hajnoczi , Paolo Bonzini , Fam Zheng , Raphael Norwitz Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Automatically size the number of virtio-scsi-pci, vhost-scsi-pci, and vhost-user-scsi-pci request virtqueues to match the number of vCPUs. Other transports continue to default to 1 request virtqueue. A 1:1 virtqueue:vCPU mapping ensures that completion interrupts are handled on the same vCPU that submitted the request. No IPI is necessary to complete an I/O request and performance is improved. Signed-off-by: Stefan Hajnoczi --- include/hw/virtio/virtio-scsi.h | 2 ++ hw/core/machine.c | 6 +++++- hw/scsi/vhost-scsi.c | 3 ++- hw/scsi/vhost-user-scsi.c | 3 ++- hw/scsi/virtio-scsi.c | 6 +++++- hw/virtio/vhost-scsi-pci.c | 10 +++++++--- hw/virtio/vhost-user-scsi-pci.c | 10 +++++++--- hw/virtio/virtio-scsi-pci.c | 10 +++++++--- 8 files changed, 37 insertions(+), 13 deletions(-) diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index 9f293bcb80..c0b8e4dd7e 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -39,6 +39,8 @@ /* Number of virtqueues that are always present */ #define VIRTIO_SCSI_VQ_NUM_FIXED 2 +#define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX + typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq; typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp; typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq; diff --git a/hw/core/machine.c b/hw/core/machine.c index bb3a7b18b1..df7664bc8d 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -28,7 +28,11 @@ #include "hw/mem/nvdimm.h" #include "migration/vmstate.h" -GlobalProperty hw_compat_5_0[] = {}; +GlobalProperty hw_compat_5_0[] = { + { "virtio-scsi-device", "num_queues", "1"}, + { "vhost-scsi", "num_queues", "1"}, + { "vhost-user-scsi", "num_queues", "1"}, +}; const size_t hw_compat_5_0_len = G_N_ELEMENTS(hw_compat_5_0); GlobalProperty hw_compat_4_2[] = { diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c index c1b012aea4..5e3bc319ab 100644 --- a/hw/scsi/vhost-scsi.c +++ b/hw/scsi/vhost-scsi.c @@ -272,7 +272,8 @@ static Property vhost_scsi_properties[] = { DEFINE_PROP_STRING("vhostfd", VirtIOSCSICommon, conf.vhostfd), DEFINE_PROP_STRING("wwpn", VirtIOSCSICommon, conf.wwpn), DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0), - DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1), + DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, + VIRTIO_SCSI_AUTO_NUM_QUEUES), DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size, 128), DEFINE_PROP_BOOL("seg_max_adjust", VirtIOSCSICommon, conf.seg_max_adjust, diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c index f8bd158c31..4b56de97a8 100644 --- a/hw/scsi/vhost-user-scsi.c +++ b/hw/scsi/vhost-user-scsi.c @@ -163,7 +163,8 @@ static void vhost_user_scsi_unrealize(DeviceState *dev) static Property vhost_user_scsi_properties[] = { DEFINE_PROP_CHR("chardev", VirtIOSCSICommon, conf.chardev), DEFINE_PROP_UINT32("boot_tpgt", VirtIOSCSICommon, conf.boot_tpgt, 0), - DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, 1), + DEFINE_PROP_UINT32("num_queues", VirtIOSCSICommon, conf.num_queues, + VIRTIO_SCSI_AUTO_NUM_QUEUES), DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSICommon, conf.virtqueue_size, 128), DEFINE_PROP_UINT32("max_sectors", VirtIOSCSICommon, conf.max_sectors, diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index f3d60683bd..f055ae7389 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -891,6 +891,9 @@ void virtio_scsi_common_realize(DeviceState *dev, virtio_init(vdev, "virtio-scsi", VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig)); + if (s->conf.num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { + s->conf.num_queues = 1; + } if (s->conf.num_queues == 0 || s->conf.num_queues > VIRTIO_QUEUE_MAX - VIRTIO_SCSI_VQ_NUM_FIXED) { error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " @@ -964,7 +967,8 @@ static void virtio_scsi_device_unrealize(DeviceState *dev) } static Property virtio_scsi_properties[] = { - DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues, 1), + DEFINE_PROP_UINT32("num_queues", VirtIOSCSI, parent_obj.conf.num_queues, + VIRTIO_SCSI_AUTO_NUM_QUEUES), DEFINE_PROP_UINT32("virtqueue_size", VirtIOSCSI, parent_obj.conf.virtqueue_size, 256), DEFINE_PROP_BOOL("seg_max_adjust", VirtIOSCSI, diff --git a/hw/virtio/vhost-scsi-pci.c b/hw/virtio/vhost-scsi-pci.c index 2b25db9a3c..9f377a84cf 100644 --- a/hw/virtio/vhost-scsi-pci.c +++ b/hw/virtio/vhost-scsi-pci.c @@ -47,11 +47,15 @@ static void vhost_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostSCSIPCI *dev = VHOST_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf; + + if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { + conf->num_queues = + virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); + } if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { - vpci_dev->nvectors = vs->conf.num_queues + - VIRTIO_SCSI_VQ_NUM_FIXED + 1; + vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); diff --git a/hw/virtio/vhost-user-scsi-pci.c b/hw/virtio/vhost-user-scsi-pci.c index 80710ab170..2a4c0d27f1 100644 --- a/hw/virtio/vhost-user-scsi-pci.c +++ b/hw/virtio/vhost-user-scsi-pci.c @@ -53,11 +53,15 @@ static void vhost_user_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VHostUserSCSIPCI *dev = VHOST_USER_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + VirtIOSCSIConf *conf = &dev->vdev.parent_obj.parent_obj.conf; + + if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { + conf->num_queues = + virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); + } if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { - vpci_dev->nvectors = vs->conf.num_queues + - VIRTIO_SCSI_VQ_NUM_FIXED + 1; + vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; } qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus)); diff --git a/hw/virtio/virtio-scsi-pci.c b/hw/virtio/virtio-scsi-pci.c index c52d68053a..c3e2f8625a 100644 --- a/hw/virtio/virtio-scsi-pci.c +++ b/hw/virtio/virtio-scsi-pci.c @@ -46,13 +46,17 @@ static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) { VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev); DeviceState *vdev = DEVICE(&dev->vdev); - VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); DeviceState *proxy = DEVICE(vpci_dev); + VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf; char *bus_name; + if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) { + conf->num_queues = + virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED); + } + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { - vpci_dev->nvectors = vs->conf.num_queues + - VIRTIO_SCSI_VQ_NUM_FIXED + 1; + vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1; } /*