1 Reply Latest reply on Nov 25, 2014 12:15 AM by vavc

    Packets per Xfer vs. Xfers to queue trade off

    pietro.troi

       Hi

         

       

         

      when transferring data from FPGA to PC using Cypress Streamer and changing those 2 parameters i see different speeds. It happens that keeping Packets per Xfer at a fixed value and changing Xfers to queue from 64 to 32 i see a grater speed i would expect that queueing more packets reduces CPU overhead and this results in a greater speed...Why this is not happening ?

         

       

         

      can anybody give me an explanation ?

         

       

         

      regards

         

       

         

      Pietro

        • 1. Re: Packets per Xfer vs. Xfers to queue trade off
          vavc

           Hi,

             

           

             

          When changing the xfers in queue from 64 to 32 the speed should decrease.Please let me know when the data rate is decreasing or not.

             

           

             

          In your response "changing Xfers to queue from 64 to 32 i see a grater speed" it seems  that it is happening in the other way.i.e speed is increasing when xfers per queue is reduced.

             

           

             

          Regards,

             

          Vikas.