Some interesting suggestions here: http://www.solarisinternals.com/wiki/index.php/Networks
On 19 July 2014 22:16, Nick Perry <[email protected]> wrote: > Hi Chris. > > How much improvement do you get with jumbo frames? > > Can you achieve significantly higher output if you try multiple streams in > parallel? > > During the test are there any CPU cores with very low idle time? > > Depending on the answers to the above it might be interesting to see if > there is any improvement by increasing rx_queue_number and tx_queue_number > on the ixgbe driver. > > Regards, > > Nick > > > On 19 July 2014 14:42, Chris Ferebee via smartos-discuss < > [email protected]> wrote: > >> >> I'm trying to debug a network performance issue. >> >> I have two servers running SmartOS (20140613T024634Z and >> 20140501T225642Z), one is a Supermicro dual Xeon E5649 (64 GB RAM) and the >> other is a dual Xeon E5-2620v2 (128 GB RAM). Each has an Intel X520-DA1 >> 10GbE card, and they are both connected to 10GbE ports on a NetGear >> GS752TXS switch. >> >> The switch reports 10GbE links: >> >> 1/xg49 Enable 10G Full 10G Full Link Up >> Enable 1518 20:0C:C8:46:C8:3E 49 49 >> 1/xg50 Enable 10G Full 10G Full Link Up >> Enable 1518 20:0C:C8:46:C8:3E 50 50 >> >> as do both hosts: >> >> [root@90-e2-ba-00-2a-e2 ~]# dladm show-phys >> LINK MEDIA STATE SPEED DUPLEX DEVICE >> igb0 Ethernet down 0 >> half igb0 >> igb1 Ethernet down 0 >> half igb1 >> ixgbe0 Ethernet up 10000 full >> ixgbe0 >> >> [root@00-1b-21-bf-e1-b4 ~]# dladm show-phys >> LINK MEDIA STATE SPEED DUPLEX DEVICE >> igb0 Ethernet down 0 >> half igb0 >> ixgbe0 Ethernet up 10000 full >> ixgbe0 >> igb1 Ethernet down 0 >> half igb1 >> >> Per dladm show-linkprop, maxbw is not set on either of the net0 vnic >> interfaces. >> >> And yet, as measured via netcat, throughput is just below 1 Gbit/s: >> >> [root@90-e2-ba-00-2a-e2 ~]# time cat /zones/test/10gb | nc -v -v -n >> 192.168.168.5 8888 >> Connection to 192.168.168.5 8888 port [tcp/*] succeeded! >> >> real 1m34.662s >> user 0m11.422s >> sys 1m53.957s >> >> (In this test, 10gb is a test file that is warm in RAM and transfers via >> dd to /dev/null at approx. 2.4 GByte/s.) >> >> What could be causing the slowdown, and how might I go about debugging >> this? >> >> FTR, disk throughput, while not an issue here, appears to be perfectly >> reasonable, approx. 900 MB/s read performance. >> >> Thanks for any pointers! >> >> Chris >> >> >> >> >> ------------------------------------------- >> smartos-discuss >> Archives: https://www.listbox.com/member/archive/184463/=now >> RSS Feed: >> https://www.listbox.com/member/archive/rss/184463/22416839-083bd2e9 >> Modify Your Subscription: >> https://www.listbox.com/member/?&; >> Powered by Listbox: http://www.listbox.com >> > > ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
