During CSIT tests with vpp 20.05 rc1 and rc2 [0] as well as with vpp 20.09 rc0 [1] we can see vpp crash after starting the traffic in performance ipsec tests with 10k interfaces (tests with 1k ipsec interfaces run without failure) on haswell while these tests run well on skylake.

VPP version: 20.05-rc2~b13
sudo -E -S dpkg -l | grep vpp
ii libvppinfra 20.05-rc2~b13 amd64 Vector Packet Processing--runtime libraries
ii libvppinfra-dev 20.05-rc2~b13 amd64 Vector Packet Processing--runtime libraries
ii python3-vpp-api 20.05-rc2~b13 amd64 VPP Python3 API bindings
ii vpp 20.05-rc2~b13 amd64 Vector Packet Processing--executables
ii vpp-api-python 20.05-rc2~b13 amd64 VPP Python API bindings
ii vpp-dbg 20.05-rc2~b13 amd64 Vector Packet Processing--debug symbols
ii vpp-dev 20.05-rc2~b13 amd64 Vector Packet Processing--development support
ii vpp-plugin-core 20.05-rc2~b13 amd64 Vector Packet Processing--runtime core plugins
ii vpp-plugin-dpdk 20.05-rc2~b13 amd64 Vector Packet Processing--runtime dpdk plugin

Traceback and startup.conf files from test attached.

[0] https://logs.fd.io/production/vex-yul-rot-jenkins-1/csit-vpp-perf-report-iterative-2005-3n-hsw/2/archives/log.html.gz#s1-s1-s1-s1

[1] https://logs.fd.io/production/vex-yul-rot-jenkins-1/csit-vpp-perf-mrr-daily-master/1182/archives/log.html.gz#s1-s1-s1-s1