[dpdk-dev] soft lockup calling receive burst

[Joseph Vossen]

hello,

I am working on a dpdk-based app using version 1.6 under RH7.3.  Under varying 
traffic loads, I will intermittently notice a kernel soft lockup and the RIP 
provided by the kernel always points to the same MOV instruction in 
rte_ethdev.h (line #1982).  The stack trace looks like:


                dev = &rte_eth_devices[port_id];
                return (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id], 
rx_pkts, nb_pkts);


                473176: 0f b7 15 a7 68 38 00            movzwl 
0x3868a7(%rip),%edx      # 7f9a24 <max_rx_burst> rte_eth_rx_burst():
                47317d: 0f b6 31                                movzbl 
(%rcx),%esi
                473180: 48 89 f0                                mov %rsi,%rax
                473183: 0f b6 71 01                     movzbl 0x1(%rcx),%esi
                473187: 48 c1 e0 06                     shl $0x6,%rax
                47318b: 48 8b b8 70 ed 83 00            mov 0x83ed70(%rax),%rdi
        ---->   473192: 48 8b 0f                                mov (%rdi),%rcx
                473195: 48 8b 3c f1                             mov 
(%rcx,%rsi,8),%rdi
                473199: 4c 89 ee                                mov %r13,%rsi
                47319c: ff 90 60 ed 83 00               callq *0x83ed60(%rax)


has any one else seen something like this?

thanks