Manuel, On Mon, Jul 5, 2010 at 7:33 AM, Manuel Fuhr <manuel.f...@student.kit.edu> wrote: > On Fri, Jul 2, 2010 at 22:40, Marcus D. Leech <mle...@ripnet.com> 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 can think of a nicer way to print the error messages SX, but dropped packets are a fact of life; especially running at 25 Msps. On my linux box, running benchmark at full rate, i usually see a few dropped packets initially and at the end when it finishes. AMD Athlon(tm) II X4 620 Processor Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10) > 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". > see http://code.ettus.com/redmine/ettus/projects/public/wiki/U2binaries#UHD-Firmware-and-FPGA-Images > I also tried increasing the buffer sized but this didn't solve the problem. > > Thanks in advance, > Manuel > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
