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IIRCA2
Beginner
1,378 Views

Problem setting rx ring size using ixgbe on vSphere ESXi 5.1

I have a high throughput UDP application running on vSphere 5.1 and I am dropping packets due to rx_dma_no_resources (ethtool -S vmnic4). I have attempted to change the rx ring buffer size to 4096, but no matter what I do the highest I can seem to get is 456 (according to ethtool -G). Ethtool says the highest supported value is 4096, so does anyone know how I can increase the ring buffer size to that amount? I am using driver 3.1.32.

Thanks!

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2 Replies
Patrick_K_Intel1
Employee
126 Views

The version of the driver you have is a bit dated. I would try the latest which available from VMware at:

http://www.vmware.com/resources/compatibility/detail.php?deviceCategory=io&productid=12665&deviceCat... - IO Devices&page=1&display_interval=10&sortColumn=Partner&sortOrder=Asc http://www.vmware.com/resources/compatibility/detail.php?deviceCategory=io&productid=12665&deviceCat... - IO Devices&page=1&display_interval=10&sortColumn=Partner&sortOrder=Asc - IO Devices&page=1&display_interval=10&sortColumn=Partner&sortOrder=Asc

If this still does not work, I am afraid you will need to open a customer case with VMware, they actually own this driver. If in turn VMware needs Intel's assistance, they will contact us.

Best of luck,

Patrick

IIRCA2
Beginner
126 Views

Updating to the latest driver worked and allowed me to tune the ring size. I was using the driver that came with an HP custom image. Thanks for your help!

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