[dpdk-dev] Debug crash in bucket_enqueue ()

[Ravi Kerur]

DPDK team,

I have a simple multi process setup with OVS/DPDK as primary and another
process as secondary. OVS/DPDK sets up mempool and rings with MP/MC flags
and secondary process attaches to it. I have used
example/multi-process/simple_mp as an example. I have disabled 'ASLR' and
made sure primary and secondary use distinct EAL lcores.

test case is that for every 10/12 packets OVS/DPDK does
rte_mempool_get() and rte_ring_enqueue()
with information about the packets

secondary process does
rte_ring_dequeue() and rte_mempool_put()

Couple of minutes into the test secondary process crashes with following
baktrace.

Any other system level settings need to be set or inputs on debugging
bucket_enqueue?

#0  0x0000555555734160 in bucket_enqueue ()
#1  0x00005555555edf06 in rte_mempool_ops_enqueue_bulk (mp=0x17fa9ac80,
obj_table=0x17fac8210, n=16) at
/home/rkerur/dpdk-stable-18.11.2//x86_64-native-linuxapp-gcc/include/rte_mempool.h:704
#2  0x00005555555f072a in __mempool_generic_put (cache=0x17fac8100, n=1,
obj_table=0x7ffff4e09050, mp=0x17fa9ac80) at
/home/rkerur/dpdk-stable-18.11.2//x86_64-native-linuxapp-gcc/include/rte_mempool.h:1249
#3  rte_mempool_generic_put (cache=0x17fac8100, n=1,
obj_table=0x7ffff4e09050, mp=0x17fa9ac80) at
/home/rkerur/dpdk-stable-18.11.2//x86_64-native-linuxapp-gcc/include/rte_mempool.h:1285
#4  rte_mempool_put_bulk (n=1, obj_table=0x7ffff4e09050, mp=0x17fa9ac80) at
/home/rkerur/dpdk-stable-18.11.2//x86_64-native-linuxapp-gcc/include/rte_mempool.h:1308
#5  rte_mempool_put (obj=0x17f994300, mp=0x17fa9ac80) at
/home/rkerur/dpdk-stable-18.11.2//x86_64-native-linuxapp-gcc/include/rte_mempool.h:1326
#6  lcore_recv (arg=0x7fffffffd5b3) at /home/rkerur/simple_mp_ovs/main.c:369
#7  0x00005555556df8f1 in eal_thread_loop ()
#8  0x00007ffff72086db in start_thread (arg=0x7ffff4e0b700) at
pthread_create.c:463
#9  0x00007ffff6f3188f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thanks,
Ravi