Hi, Since the segmentation fault is occurring in the DPDK vhost code, it might be a good idea to post this information to the d...@dpdk.org mailing list where you might be able to get more feedback on the root cause.
Thanks, Ciara > > • What you did that make the problem appear. > We have an openstack kilo setup. it has 3 controllers and 3 computes. 1 of > the controllers runs an ODL, which manages the OVS on each compute host. > The compute hosts are running an hlinux OS, which is HPE's Debian8-based > OS. > each host has 2 numa nodes, each with 12 cores (24 Hyper Threaded). each > numa with 64GB. > We patched neutron to create vhostuser ports (which is not available in > stable kilo), in order to work with dpdk in order to achieve highest > throughput possible. > OVS was running with "-c 4" and pmd-core-mask 0x38. all these cores were > isolated. > nova was configured with vcpu_pin_set=6-11, and the flavor had 6 vCPUs. > flavor had 16 1GB huge pages, backed up by real 1GB huge pages in host. > Then running a traffic generator inside 2 VMs, using DPDK, in order to > generate traffic. sending directly to the other VMs mac and IP. > • What you expected to happen. > We expected traffic to flow. > • What actually happened. > OVS crashed (in dpdk code). Attached BT. > • The Open vSwitch version number (as output by ovs-vswitchd --version) > root@BASE-CCP-CPN-N0001-NETCLM:~# ovs-vswitchd --version > ovs-vswitchd (Open vSwitch) 2.5.0 > Compiled Apr 4 2016 08:51:09 > • Any local patches or changes you have applied (if any). > applied ce179f1163f947fe8dc5afa35a2cdd0756bb53a0 > The following are also handy sometimes: > • The kernel version on which Open vSwitch is running (from /proc/version) > and the distribution and version number of your OS (e.g. "Centos 5.0"). > root@BASE-CCP-CPN-N0001-NETCLM:~# cat /proc/version > Linux version 3.14.48-1-amd64-hlinux (pbuilder@build) (gcc version 4.9.2 > (Debian 4.9.2-10) ) #hlinux1 SMP Thu Aug 6 16:02:22 UTC 2015 > • If you have Open vSwitch configured to connect to an OpenFlow controller, > the output of ovs-ofctl show <bridge> for each <bridge> configured in the > vswitchd configuration database. > We are using odl. attached outputs. > • A fix or workaround, if you have one > We disabled mrg_rxbuf (mrg_rxbuf=off) in qemu > > We can supply more info if necessary, like our exact build process etc. _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
