From nobody Mon May 6 16:13:44 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1516366264170420.2120173899564; Fri, 19 Jan 2018 04:51:04 -0800 (PST) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A03984E90A; Fri, 19 Jan 2018 12:51:01 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B62B719152; Fri, 19 Jan 2018 12:50:59 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 412F162CEB; Fri, 19 Jan 2018 12:50:57 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id w0JCouNj022473 for ; Fri, 19 Jan 2018 07:50:56 -0500 Received: by smtp.corp.redhat.com (Postfix) id 2FFFA5D970; Fri, 19 Jan 2018 12:50:56 +0000 (UTC) Received: from moe.brq.redhat.com (unknown [10.43.2.192]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8956A7E0B1 for ; Fri, 19 Jan 2018 12:50:52 +0000 (UTC) From: Michal Privoznik To: libvir-list@redhat.com Date: Fri, 19 Jan 2018 13:50:49 +0100 Message-Id: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH] qemu: Expose rx/tx_queue_size in qemu.conf too X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 19 Jan 2018 12:51:03 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" In 2074ef6cd4a2 and c56cdf259 (and friends) we've added two attributes to virtio NICs: rx_queue_size and tx_queue_size. However, sysadmins might want to set these on per-host basis but don't necessarily have an access to domain XML (e.g. because they are generated by some other app). So let's expose them under qemu.conf (the settings from domain XML still take precedence as they are more specific ones). Signed-off-by: Michal Privoznik --- docs/formatdomain.html.in | 12 +++++++++-- src/qemu/libvirtd_qemu.aug | 4 ++++ src/qemu/qemu.conf | 7 +++++++ src/qemu/qemu_command.c | 42 ++++++++++++++++++++++++++++++----= ---- src/qemu/qemu_command.h | 3 ++- src/qemu/qemu_conf.c | 4 ++++ src/qemu/qemu_conf.h | 3 +++ src/qemu/qemu_hotplug.c | 2 +- src/qemu/test_libvirtd_qemu.aug.in | 2 ++ 9 files changed, 66 insertions(+), 13 deletions(-) diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in index d272cc1ba..c0107ab4b 100644 --- a/docs/formatdomain.html.in +++ b/docs/formatdomain.html.in @@ -5373,7 +5373,11 @@ qemu-kvm -net nic,model=3D? /dev/null some restrictions on actual value. For instance, latest QEMU (as of 2016-09-01) requires value to be a power of two from [256, 1024] range. - Since 2.3.0 (QEMU and KVM only)
<= br/> + Since 2.3.0 (QEMU and KVM only) + Then, Since 4.1.0 the default value c= an be + set in qemu.conf file and thus overrides hypervisor + default. +

=20 In general you should leave this option alone, unless you are very certain you know what you are doing. @@ -5389,7 +5393,11 @@ qemu-kvm -net nic,model=3D? /dev/null range. In addition to that, this may work only for a subset of interface types, e.g. aforementioned QEMU enables this option only for vhostuser type. - Since 3.7.0 (QEMU and KVM only)
<= br/> + Since 3.7.0 (QEMU and KVM only) + Then, Since 4.1.0 the default value c= an be + set in qemu.conf file and thus overrides hypervisor + default. +

=20 In general you should leave this option alone, unless you are very certain you know what you are doing. diff --git a/src/qemu/libvirtd_qemu.aug b/src/qemu/libvirtd_qemu.aug index c19bf3a43..084290296 100644 --- a/src/qemu/libvirtd_qemu.aug +++ b/src/qemu/libvirtd_qemu.aug @@ -118,6 +118,9 @@ module Libvirtd_qemu =3D let vxhs_entry =3D bool_entry "vxhs_tls" | str_entry "vxhs_tls_x509_cert_dir" =20 + let virtio_entry =3D int_entry "rx_queue_size" + | int_entry "tx_queue_size" + (* Each entry in the config is one of the following ... *) let entry =3D default_tls_entry | vnc_entry @@ -137,6 +140,7 @@ module Libvirtd_qemu =3D | gluster_debug_level_entry | memory_entry | vxhs_entry + | virtio_entry =20 let comment =3D [ label "#comment" . del /#[ \t]*/ "# " . store /([^ \= t\n][^\n]*)?/ . del /\n/ "\n" ] let empty =3D [ label "#empty" . eol ] diff --git a/src/qemu/qemu.conf b/src/qemu/qemu.conf index 43dd561cc..a945ebdd5 100644 --- a/src/qemu/qemu.conf +++ b/src/qemu/qemu.conf @@ -775,3 +775,10 @@ # This directory is used for memoryBacking source if configured as file. # NOTE: big files will be stored here #memory_backing_dir =3D "/var/lib/libvirt/qemu/ram" + +# The following two values set the default RX/TX ring buffer size for virt= io +# interfaces. These values are taken unless overridden in domain XML. Plea= se +# note that QEMU accepts 256, 512 and 1024 only. These values correspond to +# those from domain XML. +#rx_queue_size =3D 1024 +#tx_queue_size =3D 1024 diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index b8aede32d..771c12445 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -3693,7 +3693,8 @@ qemuBuildNicStr(virDomainNetDefPtr net, =20 =20 char * -qemuBuildNicDevStr(virDomainDefPtr def, +qemuBuildNicDevStr(virQEMUDriverConfigPtr cfg, + virDomainDefPtr def, virDomainNetDefPtr net, int vlan, unsigned int bootindex, @@ -3813,21 +3814,40 @@ qemuBuildNicDevStr(virDomainDefPtr def, virBufferAsprintf(&buf, ",mq=3Don,vectors=3D%zu", 2 * vhostfdS= ize + 2); } } - if (usingVirtio && net->driver.virtio.rx_queue_size) { - if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_RX_QUEUE_SIZE))= { + if (usingVirtio) { + unsigned int rx_queue_size =3D net->driver.virtio.rx_queue_size; + + if (rx_queue_size =3D=3D 0 && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_RX_QUEUE_SIZE)) + rx_queue_size =3D cfg->rx_queue_size; + + + if (rx_queue_size && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_RX_QUEUE_SIZE)) { + net->driver.virtio.rx_queue_size =3D rx_queue_size; + virBufferAsprintf(&buf, ",rx_queue_size=3D%u", rx_queue_size); + } else if (rx_queue_size) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("virtio rx_queue_size option is not supported= with this QEMU binary")); goto error; } - virBufferAsprintf(&buf, ",rx_queue_size=3D%u", net->driver.virtio.= rx_queue_size); } - if (usingVirtio && net->driver.virtio.tx_queue_size) { - if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_TX_QUEUE_SIZE))= { + if (usingVirtio) { + unsigned int tx_queue_size =3D net->driver.virtio.tx_queue_size; + + if (tx_queue_size =3D=3D 0 && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_TX_QUEUE_SIZE)) + tx_queue_size =3D cfg->tx_queue_size; + + if (tx_queue_size && + virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_NET_TX_QUEUE_SIZE)) { + net->driver.virtio.tx_queue_size =3D tx_queue_size; + virBufferAsprintf(&buf, ",tx_queue_size=3D%u", tx_queue_size); + } else if (tx_queue_size) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("virtio tx_queue_size option is not supported= with this QEMU binary")); goto error; } - virBufferAsprintf(&buf, ",tx_queue_size=3D%u", net->driver.virtio.= tx_queue_size); } =20 if (usingVirtio && net->mtu) { @@ -8489,7 +8509,7 @@ qemuBuildVhostuserCommandLine(virQEMUDriverPtr driver, virCommandAddArg(cmd, netdev); VIR_FREE(netdev); =20 - if (!(nic =3D qemuBuildNicDevStr(def, net, -1, bootindex, + if (!(nic =3D qemuBuildNicDevStr(cfg, def, net, -1, bootindex, queues, qemuCaps))) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Error generating NIC -device string")); @@ -8526,6 +8546,7 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, int **nicindexes, bool chardevStdioLogd) { + virQEMUDriverConfigPtr cfg; int ret =3D -1; char *nic =3D NULL, *host =3D NULL; int *tapfd =3D NULL; @@ -8587,6 +8608,8 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, return -1; } =20 + cfg =3D virQEMUDriverGetConfig(driver); + switch (actualType) { case VIR_DOMAIN_NET_TYPE_NETWORK: case VIR_DOMAIN_NET_TYPE_BRIDGE: @@ -8782,7 +8805,7 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, virCommandAddArgList(cmd, "-netdev", host, NULL); } if (qemuDomainSupportsNicdev(def, net)) { - if (!(nic =3D qemuBuildNicDevStr(def, net, vlan, bootindex, + if (!(nic =3D qemuBuildNicDevStr(cfg, def, net, vlan, bootindex, vhostfdSize, qemuCaps))) goto cleanup; virCommandAddArgList(cmd, "-device", nic, NULL); @@ -8826,6 +8849,7 @@ qemuBuildInterfaceCommandLine(virQEMUDriverPtr driver, VIR_FREE(host); VIR_FREE(tapfdName); VIR_FREE(vhostfdName); + virObjectUnref(cfg); return ret; } =20 diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index bdde6f918..85f7bd1b4 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -90,7 +90,8 @@ char *qemuBuildNicStr(virDomainNetDefPtr net, int vlan); =20 /* Current, best practice */ -char *qemuBuildNicDevStr(virDomainDefPtr def, +char *qemuBuildNicDevStr(virQEMUDriverConfigPtr cfg, + virDomainDefPtr def, virDomainNetDefPtr net, int vlan, unsigned int bootindex, diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index af503d31c..2fa96431f 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -912,6 +912,10 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr= cfg, if (virConfGetValueString(conf, "memory_backing_dir", &cfg->memoryBack= ingDir) < 0) goto cleanup; =20 + if (virConfGetValueUInt(conf, "rx_queue_size", &cfg->rx_queue_size) < = 0 || + virConfGetValueUInt(conf, "tx_queue_size", &cfg->tx_queue_size) < = 0) + goto cleanup; + ret =3D 0; =20 cleanup: diff --git a/src/qemu/qemu_conf.h b/src/qemu/qemu_conf.h index a553e30e2..3f38a76c2 100644 --- a/src/qemu/qemu_conf.h +++ b/src/qemu/qemu_conf.h @@ -206,6 +206,9 @@ struct _virQEMUDriverConfig { =20 bool vxhsTLS; char *vxhsTLSx509certdir; + + unsigned int rx_queue_size; + unsigned int tx_queue_size; }; =20 /* Main driver state */ diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 6b245bd6a..18b460704 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1116,7 +1116,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver, for (i =3D 0; i < vhostfdSize; i++) VIR_FORCE_CLOSE(vhostfd[i]); =20 - if (!(nicstr =3D qemuBuildNicDevStr(vm->def, net, vlan, 0, + if (!(nicstr =3D qemuBuildNicDevStr(cfg, vm->def, net, vlan, 0, queueSize, priv->qemuCaps))) goto try_remove; =20 diff --git a/src/qemu/test_libvirtd_qemu.aug.in b/src/qemu/test_libvirtd_qe= mu.aug.in index 688e5b9fd..4fc4e2f4e 100644 --- a/src/qemu/test_libvirtd_qemu.aug.in +++ b/src/qemu/test_libvirtd_qemu.aug.in @@ -100,3 +100,5 @@ module Test_libvirtd_qemu =3D { "1" =3D "mount" } } { "memory_backing_dir" =3D "/var/lib/libvirt/qemu/ram" } +{ "rx_queue_size" =3D "1024" } +{ "tx_queue_size" =3D "1024" } --=20 2.13.6 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list