[dpdk-users] Fwd: rte_mempool_create( ) fails at rte_mempool_set_ops_byname () for name ring_mp_mc

Monika Mails mails.monika at gmail.com
Fri Jun 8 18:04:58 CEST 2018

Hi All,

I am running DPDK version 18.05

While running the binaries I see DPDK is failing in initialization, I
checked after putting some logs and found that it is failing at
API  *rte_mempool_set_ops_byname* () when it tries to read and compare
rte_mempool_ops_table, highlighted below.

/* sets mempool ops previously registered by rte_mempool_register_ops. */
rte_mempool_set_ops_byname(struct rte_mempool *mp, const char *name,
        void *pool_config)
        struct rte_mempool_ops *ops = NULL;
        unsigned i;
           /* too late, the mempool is already populated.
        if (mp->flags & MEMPOOL_F_POOL_CREATED)
                return -EEXIST;

*       for (i = 0; i < rte_mempool_ops_table.num_ops; i++)
{                if (!strcmp(name,
rte_mempool_ops_table.ops[i].name)) {                        ops =
&rte_mempool_ops_table.ops[i];                        break;
}        }*

        if (ops == NULL)
                return -EINVAL;
        mp->ops_index = i;
        mp->pool_config = pool_config;
        return 0;

Can someone from Dev team please explain what is wrong here , why
*rte_mempool_ops_table* is not initialized before using it.

Here are the logs for DPDK run :-

1528317826.271857934 CoordinatorMain.cc:96 in main NOTICE[1]: Command line:
/home/homa/platformlab/RAMCloud/obj.05302018_dpdk/coordinator -C
basic+udp:host=,port=12246 -l NOTICE --logFile
logs/20180606154345/coordinator.homa4.log --dpdkPort 0 --configDir config
1528317826.271878426 CoordinatorMain.cc:97 in main NOTICE[1]: Coordinator
process id: 4426
1528317826.271935304 DpdkDriver.cc:146 in DpdkDriver NOTICE[1]: Using DPDK
version DPDK 18.05.0
1528317826.274933336 FileLogger.cc:100 in write NOTICE[1]: DPDK: EAL:
Detected 32 lcore(s)
1528317826.274950808 FileLogger.cc:100 in write NOTICE[1]: DPDK: EAL:
Detected 4 NUMA nodes
1528317826.275127489 FileLogger.cc:100 in write NOTICE[1]: DPDK: EAL:
Multi-process socket /var/run/dpdk/homa4/mp_socket
1528317826.276794732 FileLogger.cc:100 in write NOTICE[1]: DPDK: EAL:
Probing VFIO support...
1528317826.276839798 FileLogger.cc:100 in write NOTICE[1]: DPDK: EAL: VFIO
support initialized
1528317826.630989301 CoordinatorMain.cc:153 in main ERROR[1]: Fatal error
in coordinator at ???: RAMCloud::DriverException: Failed to allocate memory
for packet buffers: No such file or directory, thrown at DpdkDriver at


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