Hi All,

This regarding running worker threads with af_packet interface on VM ubuntu
16.10.

I have tried configuring the af_packet interface with cpu worker thread
support but I am getting assertion fail not sure if it is due to worker
thread getting scheduled on core 0.

Config :
-----------

startup config:
cpu {
  workers 1
}

DBGvpp# sh threads
ID     Name                Type        LWP     Sched Policy (Priority)
lcore  Core   Socket State
0      vpp_main                        23372   other (0)
0      0      0
1      vpp_wk_0            workers     23376   other (0)
1      1      0
2                          stats       23377   other (0)
0      0      0
DBGvpp# create host-interface name enp0s9 hw-addr 08:00:27:06:00:de
host-enp0s9
DBGvpp# sh int
              Name               Idx       State          Counter
Count
host-enp0s9                       1        down
local0                            0        down
DBGvpp# set int ip address host-enp0s9 192.168.56.104/24

*DBGvpp# set int state host-enp0s9 up*
GDB:
---------

1: 
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib*/buffer_funcs.h:224
(vlib_buffer_set_known_state) assertion `vlib_get_thread_index () == 0'
fails*
Failed to save post-mortem API trace to /tmp/api_post_mortem.23372

Thread 2 "vpp_wk_0" received signal SIGABRT, Aborted.
[Switching to Thread 0x7fff93493700 (LWP 23376)]
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
58    ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb)
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
#1  0x00007ffff5e203ea in __GI_abort () at abort.c:89
#2  0x000055555555c29c in os_panic () at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vpp/vnet/main.c:263
#3  0x00007ffff6601959 in debugger () at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vppinfra/error.c:84
#4  0x00007ffff6601d61 in _clib_error (how_to_die=2, function_name=0x0,
line_number=0, fmt=0x7ffff797b000 "%s:%d (%s) assertion `%s' fails")
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vppinfra/error.c:143
#*5  0x00007ffff78b58d2 in vlib_buffer_set_known_state (vm=0x7fffb5f046f8,
buffer_index=68, state=VLIB_BUFFER_KNOWN_FREE)*
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/buffer_funcs.h:224
#6  0x00007ffff78b87e8 in fill_free_list (vm=0x7fffb5f046f8,
fl=0x7fffb6072140, min_free_buffers=256)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/buffer.c:556
#7  0x00007ffff78b8938 in alloc_from_free_list (vm=0x7fffb5f046f8,
free_list=0x7fffb6072140, alloc_buffers=0x7fffb6483464, n_alloc_buffers=256)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/buffer.c:592
#8  0x00007ffff78b8b7c in vlib_buffer_alloc_internal (vm=0x7fffb5f046f8,
buffers=0x7fffb6483464, n_buffers=256)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/buffer.c:620
#9  0x00007ffff73c15b4 in vlib_buffer_alloc (vm=0x7fffb5f046f8,
buffers=0x7fffb6483464, n_buffers=256)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/buffer_funcs.h:251
#10 0x00007ffff73c2be0 in af_packet_device_input_fn (vm=0x7fffb5f046f8,
node=0x7fffb6079d9c, frame=0x0, apif=0x7fffb5495a80)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vnet/devices/af_packet/node.c:141
#11 0x00007ffff73c3337 in af_packet_input_fn (vm=0x7fffb5f046f8,
node=0x7fffb6079d9c, frame=0x0)
    at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vnet/devices/af_packet/node.c:259
#12 0x00007ffff78f2fe6 in dispatch_node (vm=0x7fffb5f046f8,
node=0x7fffb6079d9c, type=VLIB_NODE_TYPE_INPUT,
dispatch_state=VLIB_NODE_STATE_INTERRUPT, frame=0x0,
    last_time_stamp=237041860335868) at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/main.c:1016
#13 0x00007ffff78f4f5f in vlib_main_or_worker_loop (vm=0x7fffb5f046f8,
is_main=0) at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/main.c:1552
#14 0x00007ffff78f570f in vlib_worker_loop (vm=0x7fffb5f046f8) at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/main.c:1650
#15 0x00007ffff793ef94 in vlib_worker_thread_fn (arg=0x7fffb5694e40) at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/threads.c:1378
#16 0x00007ffff6624edc in clib_calljmp () at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vppinfra/longjmp.S:110
#17 0x00007fff93492ed0 in ?? ()
#18 0x00007ffff793a4a5 in vlib_worker_thread_bootstrap_fn
(arg=0x7fffb5694e40) at
/home/sreejith/Downloads/sachin_odp4vpp/odp4vpp/build-data/../src/vlib/threads.c:464
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)


It is not clear if I missed any needed config in the startup file
configuration or an issue with an environment.  I also tried on different
Centos native machine but saw assertion.

If possible could you please suggest if anything I missed out.

Thanks & Regards,
Sreejith
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