Firas- >> From: Jeff Brower <jbro...@signalogic.com> >> >> Firas- >> A couple of brief comments: >> 1) Sounds like this was a >> high-speed data acq card, optimized for streaming, not an accelerator >> card. How big was the >> FIFO? > > The FIFO was 64MByte.
That's huge... and you mentioned a 64k block transfer, much smaller, but still more than 40 times a large Ethernet packet. It sounds to me like this particular card mfg was focused on very high rate streaming (without gaps or drops) and not on low-latency, small transfers. I would guess they didn't set up their driver to optimize small transfer sizes. Maybe even the board didn't support a small size, for example if the FIFO had to contain a minimum number of channels and/or data length before it could assert "not empty". -Jeff _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
