Opened 13 years ago
Last modified 8 years ago
#8683 closed defect
TSO broken with 82540EM — at Version 12
| Reported by: | Christian Spann | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 4.0.4 |
| Keywords: | networking TSO loss dup ack | Cc: | |
| Guest type: | Linux | Host type: | Linux |
Description (last modified by )
DiskDumps to a NFS Share on the host via a bridged network are super slow due to heavy loss, dup acks and out of order packets.
Disabling TSO with ethtool --offload eth0 tso off fixes the issue
Change History (15)
by , 13 years ago
by , 13 years ago
| Attachment: | slownfs_small.pcap added |
|---|
Pcap network log of the slow discdump showing the dup acks and retransmissions
comment:1 by , 13 years ago
Same behaviour occurs when using the virtio drivers.
The PCNET Drivers have the TSO automatically disabled in Scientific Linux 5.5 so everything works fine here.
comment:2 by , 13 years ago
I noticed that you are using the latest kernel on the host from not-yet-released 5.6. Could you try if the same problem appears with 2.6.18-194? Also could you check if disabling TSO on host's interface solves the problem?
comment:3 by , 13 years ago
I was able to reproduce the problem locally. No need to try older kernels nor disable TSO on the host. Thanks!
comment:5 by , 13 years ago
I'm not sure that #7182 is duplicated of this one. Disabling tso on hosts doesn't solves the problem, works fine disabling tso on the guests.
comment:6 by , 13 years ago
Could you apply the attached patch to see if it fixes the problem for you? You can apply the patch in the VirtualBox directory (most likely /usr/share/virtualbox) with
patch -p0 -i <path_to_downloaded_patch_file>
Then you need to rebuild modules with
/etc/init.d/vboxdrv setup
comment:7 by , 13 years ago
The patch doesn't fix the problem. Nor for windows or linux guests.
Results using scp:
remote_server -> guest 64MB 21.5MB/s 00:03
guest -> remote_server 64MB 5.0MB/s 00:13
host -> guest 64MB 21.5MB/s 00:03
guest -> host 64MB 59.3KB/s 18:31 !!!
comment:8 by , 13 years ago
Could you please attach VM log and send me at aleksey dot ilyushin at oracle dot com the capture file of 'guest->host' case obtained as described in http://www.virtualbox.org/wiki/Network_tips ?
comment:9 by , 12 years ago
Sorry for such long pauses in replying, we are limited in resources. Thank you for providing the packet capture file, we will definitely investigate the problem further. Does the problem still appear in more recent versions of VirtualBox?
comment:10 by , 12 years ago
With VBox version 4.1.4r74291 is working better
host -> guest: 70MB 35.0MB/s 00:02
guest -> host: 70MB 17.5MB/s 00:04
comment:11 by , 12 years ago
Is there a way to add myself to the CC: field of this ticket? I'd like to be kept informed of any fixes for this issue. Thank you.
comment:12 by , 12 years ago
| Description: | modified (diff) |
|---|
hoeferbe, just adding a comment like you did will add you on the cc list.
Logfile of the corresponding vm