[dpdk-dev] Debug crash in bucket_enqueue ()

Andrew Rybchenko arybchenko at solarflare.com
Thu Oct 24 18:58:20 CEST 2019


Hello,

please, see note on the following page:
https://doc.dpdk.org/guides/prog_guide/mempool_lib.html#mempool-handlers

Andrew.

On 10/24/19 7:42 PM, Ravi Kerur wrote:
> 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



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