I think we can, might take us a day or two to get time to do it. Thanks, Ben
On 03/16/2017 08:05 PM, Alexander Duyck wrote: > I'm not really interested in installing a custom version of pktgen. > Any chance you can recreate the issue with standard pktgen? > > You might try running perf to get a snapshot of what is using CPU time > on the system. It will probably give you a pretty good idea where the > code is that is eating up all your CPU time. > > - Alex > > On Thu, Mar 16, 2017 at 7:46 PM, Ben Greear <gree...@candelatech.com> wrote: >> I'm actually using a hacked up version of pktgen nicely driven by our >> GUI tool, but the crux is that you need to set min and max src IP to some >> large >> range. >> >> We are driving pktgen from a separate machine. Stock pktgen isn't good at >> reporting >> received pkts last I checked, so it may be more difficult to easily view the >> problem. >> >> I'll be happy to set up my tool on your Fedora 24 or similar VM or machine >> if you >> want. >> >> Thanks, >> Ben >> >> >> On 03/16/2017 07:35 PM, Alexander Duyck wrote: >>> >>> Can you include the pktgen script you are running? >>> >>> Also when you say you are driving traffic through the bridge are you >>> sending from something external on the system or are you actually >>> directing the traffic from pktgen into the bridge directly? >>> >>> - Alex >>> >>> On Thu, Mar 16, 2017 at 3:49 PM, Ben Greear <gree...@candelatech.com> >>> wrote: >>>> >>>> Hello, >>>> >>>> We notice that when using two igb ports as a bridge, if we use pktgen to >>>> drive traffic through the bridge and randomize (or use a very large >>>> range) >>>> for the source IP addr in pktgen, then performance of igb is very poor >>>> (like >>>> 150Mbps >>>> throughput instead of 1Gbps). It runs right at line speed if we use same >>>> src/dest >>>> IP addr in pktgen. So, seems it is related to lots of src/dest IP >>>> addresses. >>>> >>>> We see same problem when using pktgen to send to itself, and we see this >>>> in >>>> several different kernels. We specifically tested bridge mode in this >>>> stock >>>> Fedora kernel: >>>> >>>> Linux lfo350-59cc 4.9.13-101.fc24.x86_64 #1 SMP Tue Mar 7 23:48:32 UTC >>>> 2017 >>>> x86_64 x86_64 x86_64 GNU/Linux >>>> >>>> e1000e does not show this problem in our testing. >>>> >>>> Any ideas what the issue might be and how to fix it? >>>> >>>> Thanks, >>>> Ben >>>> >>>> -- >>>> Ben Greear <gree...@candelatech.com> >>>> Candela Technologies Inc http://www.candelatech.com >>>> >>> >> >> -- >> Ben Greear <gree...@candelatech.com> >> Candela Technologies Inc http://www.candelatech.com > -- Ben Greear <gree...@candelatech.com> Candela Technologies Inc http://www.candelatech.com ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
