Hello DPDK experts, I am having trouble applying ip fragmentation in multiple cores. *My ultimate questions is whether it is possible to have multiple ip fragmentation table allocated with each different direct and indirect pool. * Really thankful if somebody can point out what I am doing wrong here or provide me with some alternative solutions.
*Purpose* I am trying to apply ip fragmentation in multiple cores, and maximize the throughput performance with messages that are bigger than MTU. for each local & remote host (using 1 to 8 logical cores) 1 ~ 4 for transferring fragmented message 4 ~ 8 for receiving and assemble message *Method of Throughput -testing * Sending 4KB message from local and remote echos the message back to the local. *Problem * If I try to allocate fragmentation table to each of the cores, I get a segmentation error, and this happens no matter I shrink the size of the fragmentation table. The way I have tried to allocate the pools and frag-table are like this below. for each coreid, coreid < allocated cores; coreid++ fragmentation_table[coreid] = rte_ip_frag_table_create(...); direct_pool[coreid] = rte_pktmbuf_pool_create(...); indirect_pool[coreid] rte_pktmbuf_pool_create(...); So alternatively, I have allocated multiple fragmentation table for each lcores but let the direct and indirect pools be shared together. for each coreid, coreid < allocated cores; coreid++ fragmentation_table[coreid] = rte_ip_frag_table_create(...); direct_pool = rte_pktmbuf_pool_create(...); indirect_pool = rte_pktmbuf_pool_create(...); *Situation* Now when I send messages using multiple cores from local to remote host, the remote host only successfully receive the message when I send the message adding a delay such as ( adding sleep(1); for each message send. ) I was able to receive the message from local to remote. But, cannot receive any data when I try to send them without any delay. Personally, I suspect that I should allocate direct pool and indirect pool for each logical cores, and I think that is the main issue. Since I was only able to successfully use the frag-table using only one logical core, I suspect that I am not using the fragmentation table correctly in multiple cores. I really want to hear from the DPDK experts about this issue I am facing, and will be really grateful for any advice on this...