[dpdk-dev] soft lockup calling receive burst
Joseph Vossen
jkvossen at vossen.org
Fri Mar 20 18:53:59 CET 2015
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
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