On Apr 29, 2017, at 9:20 AM, Lonnie Abelbeck <li...@lonnie.abelbeck.com> wrote:
> Testing Update, --- snip --- > There is a lot to like with this box, excellent value, excellent performer, > though in my testing I found an obscure issue related to network traffic and > libpcap related NetStat (darkstat) monitoring where my box can be made to > lock-up tight with a specific iperf network test while darkstat is running. > I shared my "trigger" test with Michael Keuter and his box is fine, so it may > be a unique one-off related to my board. I expect to get a response from > Qotom this coming week. > > The issue I see is very deterministic and repeatable, and related to commands > that use libpcap, though "iftop" and "tcpdump" do not trigger the issue, but > "darkstat", "sngrep" and "ngrep" together with extreme iperf data demonstrate > the issue on my Qotom. I was hoping keeping the i211 NIC's at full power as > intended was the problem, that made no difference. I found a fix ! If I disable "gro" (generic-receive-offload) on any interface that libpcap could listen on (ie. all interfaces) -- ethtool -K eth0 gro off ethtool -K eth1 gro off ethtool -K eth2 gro off ethtool -K eth3 gro off -- That fixes the issue. The Qotom can still route at Gb speeds, but instead of only taking 40% of one core to do so, it now takes 75% of one core. The Qotom still out-performs the Jetway NF9HG-2930 for network routing. I'll see what Qotom has to say about it. Lonnie ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to pay...@krisk.org.
