No luck reproducing the problem w/ multiple threads and 20 MPPS worth of traffic. The code involved doesn’t look trivially broken.
You might try setting a breakpoint in nsim_configure(...) and walk through it when you try to reconfigure the simulator with traffic flowing. I suppose an munmap accident might be involved, but I don’t see the problem. HTH... Dave From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Dave Barach via Lists.Fd.Io Sent: Wednesday, October 3, 2018 6:10 PM To: Brendan Kelly <brendanake...@yahoo.com> Cc: vpp-dev@lists.fd.io Subject: Re: [vpp-dev] WRED OK, let me see if I can repro it... From: Brendan Kelly <brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>> Sent: Wednesday, October 3, 2018 6:03 PM To: Dave Barach (dbarach) <dbar...@cisco.com<mailto:dbar...@cisco.com>> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] WRED This is what I gathered. I need to figure out how to get on Jira. vpp# show version verbose Version: v18.10-rc0~553-g2f54c27 Compiled by: root Compile host: o2.opiehome.com Compile date: Tue Oct 2 16:58:15 MDT 2018 Compile location: /root/source/vpp/vpp Compiler: GCC 7.3.1 20180303 (Red Hat 7.3.1-5) Current PID: 5871 vpp# create bridge-domain 1 bridge-domain 1 vpp# show interface Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count TenGigabitEthernet82/0/0 1 down 9000/0/0/0 TenGigabitEthernet82/0/1 2 down 9000/0/0/0 local0 0 down 0/0/0/0 vpp# set interface state TenGigabitEthernet82/0/0 up vpp# set interface state TenGigabitEthernet82/0/1 up vpp# set interface l2 bridge TenGigabitEthernet82/0/0 1 vpp# set interface l2 bridge TenGigabitEthernet82/0/1 1 vpp# set nsim delay 10 ms bandwidth 10.1 gbit packet-size 128 Configured link delay 10.00 ms, 20.00 ms round-trip Sim uses 26304512 bytes per thread, 157827072 bytes total vpp# nsim enable-disable TenGigabitEthernet82/0/0 TenGigabitEthernet82/0/1 vpp# show nsim Network simulator cross-connects TenGigabitEthernet82/0/0 and TenGigabitEthernet82/0/1 ...inserting link delay of 10.00 ms, 20.00 ms round-trip vpp# show interface Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count TenGigabitEthernet82/0/0 1 up 9000/0/0/0 rx packets 16299 rx bytes 20247116 tx packets 23927 tx bytes 22969807 drops 2407 TenGigabitEthernet82/0/1 2 up 9000/0/0/0 rx packets 23946 rx bytes 22972583 tx packets 16239 tx bytes 20206975 drops 3549 local0 0 down 0/0/0/0 vpp# set nsim delay 50 ms bandwidth 10.1 gbit packet-size 128 Program received signal SIGSEGV, Segmentation fault. _dl_fixup (l=0x6df680, reloc_arg=28) at ../elf/dl-runtime.c:71 71 const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]); (gdb) On Wednesday, October 3, 2018, 8:48:01 AM MDT, Dave Barach via Lists.Fd.Io <dbarach=cisco....@lists.fd.io<mailto:dbarach=cisco....@lists.fd.io>> wrote: Please send a backtrace. Here are some general bug reporting suggestions: https://wiki.fd.io/view/VPP/BugReports. I’ve certainly reconfigured the simulator with traffic flowing without having the wheels fall off, but the code is brand-new. Thanks... Dave From: Brendan Kelly <brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>> Sent: Wednesday, October 3, 2018 10:39 AM To: brendanake...@yahoo.com<mailto:brendanake...@yahoo.com> Cc: Dave Barach (dbarach) <dbar...@cisco.com<mailto:dbar...@cisco.com>>; vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] WRED Hello Dave, if you change the nsim delay values on the fly it appears vpp crashes and all the state is lost. Is this supported? Should I file a bug? If so what logs should I attach? On Oct 3, 2018, at 08:07, Brendan Kelly via Lists.Fd.Io <brendanakelly=yahoo....@lists.fd.io<mailto:brendanakelly=yahoo....@lists.fd.io>> wrote: Ok, thanks for the input. I have it working. vpp# create bridge-domain 1 bridge-domain 1 vpp# show b bfd bier bond bridge-domain buffers vpp# show bridge-domain 1 BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding ARP-Term BVI-Intf 1 1 0 off on on flood on off N/A vpp# set interface l2 bridge TenGigabitEthernet82/0/0 1 vpp# set interface l2 bridge TenGigabitEthernet82/0/1 1 vpp# set nsim delay 10 ms bandwidth 10.1 gbit packet-size 128 Configured link delay 10.00 ms, 20.00 ms round-trip Sim uses 26304512 bytes per thread, 157827072 bytes total vpp# nsim enable-disable TenGigabitEthernet82/0/0 TenGigabitEthernet82/0/1 vpp# show nsim Network simulator cross-connects TenGigabitEthernet82/0/0 and TenGigabitEthernet82/0/1 ...inserting link delay of 10.00 ms, 20.00 ms round-trip On Wednesday, October 3, 2018, 7:19:00 AM MDT, Dave Barach via Lists.Fd.Io <dbarach=cisco....@lists.fd.io<mailto:dbarach=cisco....@lists.fd.io>> wrote: It would be easy enough for the delay simulator to enable/disable promiscuous mode. But it’s handy to bridge the pipes: traffic flows whether or not the delay simulation is enabled. D. From: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> On Behalf Of Dave Barach via Lists.Fd.Io Sent: Wednesday, October 3, 2018 9:09 AM To: Brendan Kelly <brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>>; vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: Re: [vpp-dev] WRED Put the interfaces in an L2 bridge group, or they won’t be in promiscuous mode... Here’s a config that I use a bunch: set int l2 bridge FortyGigabitEthernet86/0/1 1 set int state FortyGigabitEthernet86/0/1 up set int l2 bridge TenGigabitEthernetd/0/0 1 set int state TenGigabitEthernetd/0/0 up bin nsim_configure delay 10 ms bandwidth 10.1 gbit packet-size 128 bin nsim_enable_disable FortyGigabitEthernet86/0/1 TenGigabitEthernetd/0/0 HTH... Dave From: Brendan Kelly <brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>> Sent: Tuesday, October 2, 2018 10:03 PM To: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>; Dave Barach (dbarach) <dbar...@cisco.com<mailto:dbar...@cisco.com>> Subject: Re: [vpp-dev] WRED Hello Dave, doesn't appear to forward. My ARP packets are not being forwarded. I assume in this cross connect any packet in an interface is sent out the other interface and vice versa? Anything special needed in the startup.conf? vpp# show nsim Network simulator cross-connects TenGigabitEthernet82/0/0 and TenGigabitEthernet82/0/1 ...inserting link delay of 200.00 ms, 400.00 ms round-trip On Tuesday, October 2, 2018, 6:00:42 AM MDT, Dave Barach via Lists.Fd.Io <dbarach=cisco....@lists.fd.io<mailto:dbarach=cisco....@lists.fd.io>> wrote: With respect to delay / loss impairments, please have a look at the “nsim” plugin: src/plugins/nsim. From: <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> on behalf of "brendanakelly via Lists.Fd.Io" <brendanakelly=yahoo....@lists.fd.io<mailto:yahoo....@lists.fd.io>> Reply-To: "brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>" <brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>> Date: Monday, October 1, 2018 at 6:18 PM To: "vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>" <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Cc: "vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>" <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Subject: [vpp-dev] WRED I am looking to setup vpp with WRED. I am not sure how the WRED profiles are configured. I have hqos with 2 interfaces working in a bridge-domain and now want to enable WRED. My overall goal is to simulate the Linux tc "traffic control" application to run impairments such as delay and packet loss. -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10730): https://lists.fd.io/g/vpp-dev/message/10730 Mute This Topic: https://lists.fd.io/mt/26596674/1432032 Group Owner: vpp-dev+ow...@lists.fd.io<mailto:ow...@lists.fd.io> Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub <https://lists.fd.io/g/vpp-dev/unsub%20> [brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>] -=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10741): https://lists.fd.io/g/vpp-dev/message/10741 Mute This Topic: https://lists.fd.io/mt/26596674/1432032 Group Owner: vpp-dev+ow...@lists.fd.io<mailto:ow...@lists.fd.io> Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub <https://lists.fd.io/g/vpp-dev/unsub%20> [brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>] -=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10742): https://lists.fd.io/g/vpp-dev/message/10742 Mute This Topic: https://lists.fd.io/mt/26596674/1432032 Group Owner: vpp-dev+ow...@lists.fd.io<mailto:vpp-dev+ow...@lists.fd.io> Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>] -=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10744): https://lists.fd.io/g/vpp-dev/message/10744 Mute This Topic: https://lists.fd.io/mt/26596674/1432032 Group Owner: vpp-dev+ow...@lists.fd.io<mailto:ow...@lists.fd.io> Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub <https://lists.fd.io/g/vpp-dev/unsub%20> [brendanake...@yahoo.com<mailto:brendanake...@yahoo.com>] -=-=-=-=-=-=-=-=-=-=-=-
-=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10755): https://lists.fd.io/g/vpp-dev/message/10755 Mute This Topic: https://lists.fd.io/mt/26596674/21656 Group Owner: vpp-dev+ow...@lists.fd.io Unsubscribe: https://lists.fd.io/g/vpp-dev/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
