Re: [dpdk-users] Help with mbuf and mempool

[Suraj R Gupta <surajrgupta@iith.ac.in>]

Also char buf[PATH_MAX] is not initialised or assigned any value. Assign a
name to it.
The PATH_MAX need not be 4096, use a lesser value say 100.

On Wed, Sep 18, 2019 at 8:07 PM Arvind Narayanan <webguru2688@gmail.com>
wrote:

> Not sure, did you try to initialize the EAL first before creating mempool,
> etc.?
> rte_eal_init()
> <https://doc.dpdk.org/api/rte__eal_8h.html#a5c3f4dddc25e38c5a186ecd8a69260e3>
>
> Arvind
>
>
> On Wed, Sep 18, 2019 at 9:31 AM Tran (US), Katherine K <
> katherine.k.tran@boeing.com> wrote:
>
>> Hi,
>>
>> I have allocated hugepages. I still get the same error.
>>
>> I changed the code to the following but I still get the same error:
>>
>> ------------- Code ---------------
>>
>> struct rte_mempool *mempool = NULL;
>> #define NB_MBUF           8192
>> #define PATH_MAX        4096
>>
>> int
>> main(int argc, char **argv)
>> {
>>
>>                struct rte_mbuf *mbuf = NULL;
>>                char buf[PATH_MAX];
>>                struct rte_mempool *mp;
>>                int socket;
>>
>>                socket = SOCKET_ID_ANY;
>>                mp = rte_pktmbuf_pool_create(buf, NB_MBUF, 32, 0,
>> RTE_MBUF_DEFAULT_BUF_SIZE, socket);
>>
>> }
>>
>> regards,
>> Katie
>>
>> From: Suraj R Gupta [mailto:surajrgupta@iith.ac.in]
>> Sent: Tuesday, September 17, 2019 4:33 PM
>> To: Singh, Satish 1. (Nokia - IN/Bangalore) <satish.1.singh@nokia.com>
>> Cc: Tran (US), Katherine K <katherine.k.tran@boeing.com>; users@dpdk.org
>> Subject: Re: [dpdk-users] Help with mbuf and mempool
>>
>> Make sure you have allocated hugepages before running the application
>>
>> On Wed, Sep 18, 2019 at 9:42 AM Singh, Satish 1. (Nokia - IN/Bangalore) <
>> satish.1.singh@nokia.com<mailto:satish.1.singh@nokia.com>> wrote:
>> Hi,
>>
>> You are using Socket 0, and might be there is no memory in this socket or
>> no memory left in this socket 0. Try with SOCKET_ID_ANY.
>>
>> Regards,
>> SATISH SINGH
>>
>> -----Original Message-----
>> From: users <users-bounces@dpdk.org<mailto:users-bounces@dpdk.org>> On
>> Behalf Of Tran (US), Katherine K
>> Sent: Tuesday, September 17, 2019 11:36 PM
>> To: users@dpdk.org<mailto:users@dpdk.org>
>> Subject: [dpdk-users] Help with mbuf and mempool
>>
>> Hello,
>>
>> I am trying to allocate an mbuf to use for IP fragmentation. When
>> instantiating a mempool using rte_pktmbuf_pool_create() function, I keep
>> getting the following error message.
>>
>> Error Message:
>> * MEMPOOL: Cannot allocate tailq entry!
>>
>> Will you please let me know what I am missing?
>>
>> Regards,
>> Katie
>>
>>
>> --------------- Code ---------------------
>>
>> #include <stdio.h>
>> #include <stdlib.h>
>> #include <stdint.h>
>> #include <inttypes.h>
>> #include <sys/types.h>
>> #include <sys/param.h>
>> #include <string.h>
>> #include <sys/queue.h>
>> #include <stdarg.h>
>> #include <errno.h>
>> #include <getopt.h>
>>
>> #include <rte_common.h>
>> #include <rte_byteorder.h>
>> #include <rte_log.h>
>> #include <rte_memory.h>
>> #include <rte_memcpy.h>
>> #include <rte_memzone.h>
>> #include <rte_eal.h>
>> #include <rte_per_lcore.h>
>> #include <rte_launch.h>
>> #include <rte_atomic.h>
>> #include <rte_cycles.h>
>> #include <rte_prefetch.h>
>> #include <rte_lcore.h>
>> #include <rte_per_lcore.h>
>> #include <rte_branch_prediction.h>
>> #include <rte_interrupts.h>
>> #include <rte_pci.h>
>> #include <rte_random.h>
>> #include <rte_debug.h>
>> #include <rte_ether.h>
>> #include <rte_ethdev.h>
>> #include <rte_ring.h>
>> #include <rte_mempool.h>
>> #include <rte_mbuf.h>
>> #include <rte_lpm.h>
>> #include <rte_lpm6.h>
>> #include <rte_ip.h>
>> #include <rte_string_fns.h>
>>
>> #include <rte_ip_frag.h>
>>
>> struct rte_mempool *mempool = NULL;
>> #define NB_MBUF         8192
>> #define AERO_FRAG_SIZE  1024
>> #define PATH_MAX        4096
>>
>> //static struct rte_mempool *socket_direct_pool[RTE_MAX_NUMA_NODES];
>>
>> int
>> main(int argc, char **argv)
>> {
>>
>>         struct rte_mbuf *mbuf = NULL;
>>         struct node_queue_conf *qconf;
>>
>>         char buf[PATH_MAX];
>>         struct rte_mempool *mp;
>>         struct rte_lpm *lpm;
>>         struct rte_lpm6 *lpm6;
>>         struct rte_lpm_config lpm_config; /*KT Readded*/
>>         int socket;
>>         unsigned lcore_id;
>>
>>         unsigned elt_size;
>>
>>         lcore_id = 1;
>>         socket = rte_lcore_to_socket_id(lcore_id);
>>
>>         if (rte_lcore_is_enabled(lcore_id) == 0)
>>                 printf("RTE LCORE is enabled!");
>>
>>         socket = rte_lcore_to_socket_id(lcore_id);
>>         if (socket == SOCKET_ID_ANY)
>>                 socket = 0;
>>
>>         elt_size = sizeof(struct rte_mbuf) +
>> (unsigned)RTE_MBUF_DEFAULT_BUF_SIZE;
>>
>>         //mp = rte_mempool_create_empty(buf, NB_MBUF, elt_size,
>> RTE_MBUF_DEFAULT_BUF_SIZE, sizeof(struct rte_pktmbuf_pool_private), socket,
>> 0);
>>
>>         mp = rte_pktmbuf_pool_create(buf, NB_MBUF, 32, 0,
>> RTE_MBUF_DEFAULT_BUF_SIZE, socket);
>>
>> /*
>>         if (socket_direct_pool[socket] == NULL) {
>>                 RTE_LOG(INFO, IP_FRAG, "Creating direct mempool on socket
>> %i\n",
>>                                 socket);
>>                 snprintf(buf, sizeof(buf), "pool_direct_%i", socket);
>>
>>                 mp = rte_pktmbuf_pool_create(buf, NB_MBUF, 32,
>>                         0, AERO_FRAG_SIZE, socket);
>>
>>                 if (mp == NULL) {
>>                         RTE_LOG(ERR, IP_FRAG, "Cannot create direct
>> mempool\n");
>>                         return -1;
>>                 }
>>                 socket_direct_pool[socket] = mp;
>>
>>         }
>> */
>>         //mbuf = rte_pktmbuf_alloc(mp);
>>
>>         //fragment(mbuf, qconf);
>>
>>
>> }
>>
>> ------------------------------------------
>>
>>
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>> >
>>
>>
>> --
>> Thanks and Regards
>> Suraj R Gupta
>>
>

-- 
Thanks and Regards
Suraj R Gupta