search for: xmit

...nt trees. In the hope to get everyone on the same page, I created several variants of this patch so they can be compared. Whoever's interested, please check out the following, and tell me how these compare: kernel: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git virtio-net-limit-xmit-polling/base - this is net-next baseline to test against virtio-net-limit-xmit-polling/v0 - fixes checks on out of capacity virtio-net-limit-xmit-polling/v1 - previous revision of the patch this does xmit,free,xmit,2*free,free virtio-net-limit-xmit-polling/v2 - new revision of the patch this do...

...nt trees. In the hope to get everyone on the same page, I created several variants of this patch so they can be compared. Whoever's interested, please check out the following, and tell me how these compare: kernel: git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git virtio-net-limit-xmit-polling/base - this is net-next baseline to test against virtio-net-limit-xmit-polling/v0 - fixes checks on out of capacity virtio-net-limit-xmit-polling/v1 - previous revision of the patch this does xmit,free,xmit,2*free,free virtio-net-limit-xmit-polling/v2 - new revision of the patch this do...

Hi, On Tue, 2023-03-07 at 09:49 +0800, Xuan Zhuo wrote: > On Mon, 6 Mar 2023 12:58:22 -0500, "Michael S. Tsirkin" <mst at redhat.com> wrote: > > On Mon, Mar 06, 2023 at 12:15:33PM +0800, Xuan Zhuo wrote: > > > If the queue of xdp xmit is not an independent queue, then when the xdp > > > xmit used all the desc, the xmit from the __dev_queue_xmit() may encounter > > > the following error. > > > > > > net ens4: Unexpected TXQ (0) queue failure: -28 > > > > > > This patch adds...

If the queue of xdp xmit is not an independent queue, then when the xdp xmit used all the desc, the xmit from the __dev_queue_xmit() may encounter the following error. net ens4: Unexpected TXQ (0) queue failure: -28 This patch adds a check whether sq is full in XDP Xmit. Thanks. Xuan Zhuo (2): virtio_net: separate th...

The virtio_net driver is complicated by the two methods of freeing old xmit buffers (in addition to freeing old ones at the start of the xmit path). The original code used a 1/10 second timer attached to xmit_free(), reset on every xmit. Before we orphaned skbs on xmit, the transmitting userspace could block with a full socket until the timer fired, the skb destructor wa...

The virtio_net driver is complicated by the two methods of freeing old xmit buffers (in addition to freeing old ones at the start of the xmit path). The original code used a 1/10 second timer attached to xmit_free(), reset on every xmit. Before we orphaned skbs on xmit, the transmitting userspace could block with a full socket until the timer fired, the skb destructor wa...

If the queue of xdp xmit is not an independent queue, then when the xdp xmit used all the desc, the xmit from the __dev_queue_xmit() may encounter the following error. net ens4: Unexpected TXQ (0) queue failure: -28 This patch adds a check whether sq is full in XDP Xmit. Thanks. v1: 1. rename to check_sq_full_and_d...

On Wed, Mar 08, 2023 at 04:13:12PM +0800, Yunsheng Lin wrote: > On 2023/3/8 15:14, Xuan Zhuo wrote: > > On Wed, 8 Mar 2023 14:59:36 +0800, Yunsheng Lin <linyunsheng at huawei.com> wrote: > >> On 2023/3/8 10:49, Xuan Zhuo wrote: > >>> If the queue of xdp xmit is not an independent queue, then when the xdp > >>> xmit used all the desc, the xmit from the __dev_queue_xmit() may encounter > >>> the following error. > >>> > >>> net ens4: Unexpected TXQ (0) queue failure: -28 > >>> > >>>...

----- Original Message Header ----- Subject: Re: [PATCH 5/5] tun: vringfd xmit support. From: rusty at rustcorp.com.au; To: akpm at linux-foundation.org; Cc: netdev at vger.kernel.org; maxk at qualcomm.com; virtualization at lists.linux-foundation.org; linux-kernel at vger.kernel.org; ----------------------------------- Warning: Attachment contains virus code or meets the f...

The patch virtio_net: limit xmit polling got the logic reversed: it polled while we had capacity not while ring was empty. Fix it up and clean up a bit by using a for loop. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- OK, turns out that patch was borken. Here's a fix that survived stress test on my box. P...

The patch virtio_net: limit xmit polling got the logic reversed: it polled while we had capacity not while ring was empty. Fix it up and clean up a bit by using a for loop. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- OK, turns out that patch was borken. Here's a fix that survived stress test on my box. P...

If we fail to transmit a packet, we assume the queue is full and put the skb into last_xmit_skb. However, if more space frees up before we xmit it, we loop, and the result can be transmitting the same skb twice. Fix is simple: set skb to NULL if we've used it in some way, and check before sending. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/net/virtio...

If we fail to transmit a packet, we assume the queue is full and put the skb into last_xmit_skb. However, if more space frees up before we xmit it, we loop, and the result can be transmitting the same skb twice. Fix is simple: set skb to NULL if we've used it in some way, and check before sending. Signed-off-by: Rusty Russell <rusty at rustcorp.com.au> --- drivers/net/virtio...

After we linearize page, we should xmit this page instead of the page of first buffer which may lead unexpected result. With this patch, we can see correct packet during XDP_TX. Cc: John Fastabend <john.r.fastabend at intel.com> Signed-off-by: Jason Wang <jasowang at redhat.com> --- drivers/net/virtio_net.c | 2 +- 1 file c...

Author: danice Repository: /hg/zfs-crypto/gate Revision: 23a634d2405ff5c1e9e1ecf200708d8159060505 Log message: 6364698 Add /etc/system tunable support for XMITS'' UPPER_RTRY counter registers Files: update: usr/src/uts/sun4u/io/pci/pci_space.c update: usr/src/uts/sun4u/io/pci/pcisch.c update: usr/src/uts/sun4u/sys/pci/pci_pbm.h update: usr/src/uts/sun4u/sys/pci/pci_space.h update: usr/src/uts/sun4u/sys/pci/pcisch.h

On Mon, 28 Jun 2004 20:21:59 +0530 (IST) <ravivsn@www.rocsys.com> wrote: > > Hi, > I wrote a module to create dummy ethernet device, the intention is to > add it to a bridge and transmit modified packets. I get ethernet device > created but its xmit function is not called when the bridge receives a > packet. The interface has to go through the Spanning Tree Protocol (STP) initialization process to get into the forwarding state which takes a while (and it has to be marked up). Use 'brctl showstp br0' to see. > I feel I have mis...

...value, my bow to the Samba team :) If I change the block size to 65488 or more, then the writing speed falls down to 3 MB/s, which is not what I expect from a 100Mbit network :\ Samba behaves this way even if SO_RCVBUF and SO_SNDBUF are set to 8192 and "read size" to 16384 and "max xmit" to 16384. The corresponding part of my smb.conf looks like this: client code page = 852 preserve case = yes socket options = TCP_NODELAY IPTOS_LOWDELAY IPTOS_THROUGHPUT SO_KEEPALIVE SO_RCVBUF=65535 SO_SNDBUF=65535 oplocks = True getwd cache = Yes null passwords = no rea...

...t Content-Disposition: inline Message-Id: <200807151340.00446.rusty at rustcorp.com.au> From: Mark McLoughlin <markmc at redhat.com> On Mon, 2008-05-26 at 17:42 +1000, Rusty Russell wrote: > If we fail to transmit a packet, we assume the queue is full and put > the skb into last_xmit_skb. However, if more space frees up before we > xmit it, we loop, and the result can be transmitting the same skb twice. > > Fix is simple: set skb to NULL if we've used it in some way, and check > before sending. ... > diff -r 564237b31993 drivers/net/virtio_net.c > --- a/...

...t Content-Disposition: inline Message-Id: <200807151340.00446.rusty at rustcorp.com.au> From: Mark McLoughlin <markmc at redhat.com> On Mon, 2008-05-26 at 17:42 +1000, Rusty Russell wrote: > If we fail to transmit a packet, we assume the queue is full and put > the skb into last_xmit_skb. However, if more space frees up before we > xmit it, we loop, and the result can be transmitting the same skb twice. > > Fix is simple: set skb to NULL if we've used it in some way, and check > before sending. ... > diff -r 564237b31993 drivers/net/virtio_net.c > --- a/...

We check for finished xmit skbs on every xmit, or on a timer (unless the host promises to force an interrupt when the xmit ring is empty). This can penalize userspace tasks which fill their sockbuf. Not much difference with TSO, but measurable with large numbers of packets. There are a finite number of packets which can be...