[dpdk-dev] soft lockup calling receive burst

[Joseph Vossen <jkvossen@vossen.org>]

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