On Fri, Jul 2, 2010 at 22:40, Marcus D. Leech <[email protected]> wrote: > I suspect that my GiGE NIC may be dropping packets. It's an > RTL8168d-type chip, according to "dmesg". > > Are there known-to-be-good-with-GnuRadio NICs for PCI with low-profile > brackets out there? This is for > a 2U server platform. I have the same problem that some packets from the USRP2 are getting dropped.
I tested this with a USRP2 with the latest UHD fpga image (u2_rev3-udp-ise12-20100615.bin) and firmware (txrx_uhd_20100621.bin). The host computers were running the latest uhd host code (a34f930a79a0c626706a5f7532d8f692446d3c35). The first test machine is a Phenom X4 with Windows XP and two cards (i tested both), a Realtek onboard chipset (RTL8111/8168B PCI Express Gigabit Ethernet controller) and an Intel PCI Card (82541GI Gigabit Ethernet Controller). I even tested with a third card (Intel Dual-Port PCI Express card) but it also had the same problems. Second test machine is a Core2 Duo running Debian/squeeze and has a Broadcom BCM5787M PCI Express onboard. Test was made using "rx_timed_samples --rxrate 25000000 --nsamps 1000000" and "rx_timed_samples --rxrate 62500000 --nsamps 1000000" (on Windows built as release target) but it often indicates dropped packets (SX) on both platforms. Capturing with wireshark (or ulogd with pcap target) and decoding the VRT packets afterwards (using some python scripts) shows the same result. I tried using the benchmark_rx example but it fails because even after sending "STREAM_MODE_STOP_CONTINUOUS". I also tried increasing the buffer sized but this didn't solve the problem. Thanks in advance, Manuel _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
