1 Reply Latest reply on Nov 9, 2015 6:29 AM by giladber

    How to enable extended tag on ConnectX-3 ?

    jwb

      Hi all,

       

      I'm using DPDK with a Mellanox ConnectX-3. Performance is quite good but I was wondering if it is possible to enable extended tag to increase performance for small packets ?

      In DPDK docs (5. Enabling Additional Functionality — DPDK 2.2.0-rc0 documentation) some addresses are specified to be used with setpci but I am not sure if these are the same on the Mellanox Card ?

      Furthermore, I cant seem to change the data on those addresses even if I wanted to ;-)

       

      Using the config option in DPDK does not seem to yield a performance difference... probably because it only applies to adapters using the igb_uio driver.

       

      I have successfully changed the max read request using setpci and register 68.w... So my question is: Is there a similar way to enable extended tag ?