Hi all,
recently I began using "dpdk-17.11-11.el7.x86_64" rpm (RedHat rpm) on
RedHat 7.5 kernel 3.10.0-862.6.3.el7.x86_64 as a porting of an
application from RH6 to RH7. On RH6 I used dpdk-2.2.0.
This application is made up by one or more threads (each one on a
different logical core) reading packets from i40e interfaces.
Each thread can call the following code lines when receiving a specific
packet:
RTE_LCORE_FOREACH(lcore_id)
{
result =
rte_mempool_get(cea_main_lcore_conf[lcore_id].de_conf.cmd_pool, (VOID_P
*) &new_work); // mempools are created one for each logical core
if (((uint64_t)(new_work)) < 0x7f0000000000)
printf("Result %d, lcore di partenza %u, lcore di ricezione
%u, pointer %p\n", result, rte_lcore_id(), lcore_id, new_work); //
debug print, on my server it should never happen but with multi-thread
happens always on the last logical core!!!!
if (result == 0)
{
new_work->command = command; // usage of the memory gotten
from the mempool... <<<<<- here is where the application crashes!!!!
result =
rte_ring_enqueue(cea_main_lcore_conf[lcore_id].de_conf.cmd_ring,
(VOID_P) new_work); // enqueues the gotten buffer on the rings of all
lcores
// check on result value ...
}
else
{
// do something if result != 0 ...
}
}
This code worked perfectly (never had an issue) on dpdk-2.2.0, while if
I use more than 1 thread doing these operations on dpdk-17.11 it happens
that after some times the "new_work" pointer is not a good one, and the
application crashes when using that pointer.
It seems that these lines cannot be used by more than one thread
simultaneously. I also used many 2017 and 2018 dpdk versions without
success.
Is this code possible on the new dpdk versions? Or have I to change my
application so that this code is called just by one lcore at a time?
Matteo
