virtio-net: increase defaults rx|tx-queue-size to 1024

This is reducing packet drop on high pps, and also needed for dpdk.

Redhat already have use it by default in rhev and his openstack platform too
since 2019.

I'm using it in production since 6 months, I don't have seen performance regression.

fix: (which ask for custom option, but setting it by default seem fine for me)

https://bugzilla.proxmox.com/show_bug.cgi?id=1546
https://bugzilla.proxmox.com/show_bug.cgi?id=2349
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 033d549178474619d9587025ba7c18b854094851..51e9a5198fb64a46abfc47c995a2abfd46a7e967 100644 (file)
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1766,6 +1766,11 @@ sub print_netdevice_full {
            $tmpstr .= ",packed=on";
        }
     }
+
+    if (min_version($machine_version, 7, 1) && $net->{model} eq 'virtio'){
+       $tmpstr .= ",rx_queue_size=1024,tx_queue_size=1024";
+    }
+
     $tmpstr .= ",bootindex=$net->{bootindex}" if $net->{bootindex} ;
 
     if (my $mtu = $net->{mtu}) {

diff --git a/test/cfg2cmd/efidisk-on-rbd.conf.cmd b/test/cfg2cmd/efidisk-on-rbd.conf.cmd
index b312d8030c3c1b2cc9849fc57bc9f6c0cb27d23f..7112c14258d7c80d94eac9fb4189e0e5fcc13fbb 100644 (file)
--- a/test/cfg2cmd/efidisk-on-rbd.conf.cmd
+++ b/test/cfg2cmd/efidisk-on-rbd.conf.cmd
@@ -28,5 +28,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=pc+pve0'

diff --git a/test/cfg2cmd/q35-linux-hostpci-multifunction.conf.cmd b/test/cfg2cmd/q35-linux-hostpci-multifunction.conf.cmd
index 9b69d0210fa0f575bce06ddd3ed977e4e4a3022f..83d44269f3ff4bf44ebafafbd497793da372c9a8 100644 (file)
--- a/test/cfg2cmd/q35-linux-hostpci-multifunction.conf.cmd
+++ b/test/cfg2cmd/q35-linux-hostpci-multifunction.conf.cmd
@@ -32,5 +32,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=q35+pve0'

diff --git a/test/cfg2cmd/q35-linux-hostpci-x-pci-overrides.conf.cmd b/test/cfg2cmd/q35-linux-hostpci-x-pci-overrides.conf.cmd
index 30de58f2d8900a9250e2f2be66cb4b8b6729c902..c323a2199cceb62911a96d0faebb37de554eec1e 100644 (file)
--- a/test/cfg2cmd/q35-linux-hostpci-x-pci-overrides.conf.cmd
+++ b/test/cfg2cmd/q35-linux-hostpci-x-pci-overrides.conf.cmd
@@ -31,5 +31,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=q35+pve0'

diff --git a/test/cfg2cmd/q35-linux-hostpci.conf.cmd b/test/cfg2cmd/q35-linux-hostpci.conf.cmd
index 96bb2df40ff9a2094e624f0c6aab4eda76236613..9cec8c990fa39c78a918420f27fd12240c620cab 100644 (file)
--- a/test/cfg2cmd/q35-linux-hostpci.conf.cmd
+++ b/test/cfg2cmd/q35-linux-hostpci.conf.cmd
@@ -37,5 +37,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=q35+pve0'

diff --git a/test/cfg2cmd/q35-simple.conf.cmd b/test/cfg2cmd/q35-simple.conf.cmd
index faccdca38c2b56e1acf2ada272d78b4aac3aab3a..882cc781a1415d0190c3a634d8eb24fac4e5d631 100644 (file)
--- a/test/cfg2cmd/q35-simple.conf.cmd
+++ b/test/cfg2cmd/q35-simple.conf.cmd
@@ -25,5 +25,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=2E:01:68:F9:9C:87,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=q35+pve0'

diff --git a/test/cfg2cmd/qemu-xhci-7.1.conf.cmd b/test/cfg2cmd/qemu-xhci-7.1.conf.cmd
index da1ad22b2b09bed17e0e79120f1eddb4c18b3be8..df4c7030b19e61b497258d82cf71883c24740bd1 100644 (file)
--- a/test/cfg2cmd/qemu-xhci-7.1.conf.cmd
+++ b/test/cfg2cmd/qemu-xhci-7.1.conf.cmd
@@ -33,5 +33,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A1,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A1,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=pc+pve0'

diff --git a/test/cfg2cmd/qemu-xhci-q35-7.1.conf.cmd b/test/cfg2cmd/qemu-xhci-q35-7.1.conf.cmd
index 1c9f7d52a259a47f8d766067545cf3e68c463540..9b45ae9b0e8d7a7bbfac83121bdcc6360667b8c9 100644 (file)
--- a/test/cfg2cmd/qemu-xhci-q35-7.1.conf.cmd
+++ b/test/cfg2cmd/qemu-xhci-q35-7.1.conf.cmd
@@ -25,5 +25,5 @@
   -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3,free-page-reporting=on' \
   -iscsi 'initiator-name=iqn.1993-08.org.debian:01:aabbccddeeff' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A1,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A1,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'type=pc-q35-7.1+pve0'

diff --git a/test/cfg2cmd/seabios_serial.conf.cmd b/test/cfg2cmd/seabios_serial.conf.cmd
index 68061577326c460d42a86a21f56a26008220a061..0c3e3ed497ccca780911ee2f66cc5823d14c3485 100644 (file)
--- a/test/cfg2cmd/seabios_serial.conf.cmd
+++ b/test/cfg2cmd/seabios_serial.conf.cmd
@@ -29,5 +29,5 @@
   -drive 'file=/var/lib/vz/images/8006/vm-8006-disk-0.qcow2,if=none,id=drive-scsi0,discard=on,format=qcow2,cache=none,aio=io_uring,detect-zeroes=unmap' \
   -device 'scsi-hd,bus=scsihw0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0,bootindex=100' \
   -netdev 'type=tap,id=net0,ifname=tap8006i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' \
-  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A0,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300' \
+  -device 'virtio-net-pci,mac=A2:C0:43:77:08:A0,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=1024,bootindex=300' \
   -machine 'smm=off,type=pc+pve0'