ip_squeue_fanout=1 ?
On 27/06/2012 11:32, Sašo Kiselkov wrote:
Hi All,
I'm really struggling to get on top of a networking issue in oi_151a4
involving multicast. I'm building a Video-on-Demand server receiving
tons of multicast traffic (50k pkts/s) in about 100 multicast streams on
a dual 16-core Opteron (Dell R715) system. Looking at mpstat, I can see
something like:
CPU xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl
21 0 1102 33 119 4 23 95 0 853 1 9 0 90
22 0 1063 23 78 1 20 68 0 663 1 5 0 95
23 0 4039 87 5961 2 81 63 0 1999 3 74 0 24 (!!)
24 0 4142 127 6110 4 84 105 0 2902 4 30 0 67
25 0 1152 54 150 2 32 79 0 1435 2 7 0 90
tx_ring_size = 4096;
rx_ring_size = 4096;
rx_group_number = 4;
But nothing helped which leads me to suspect I'm hitting some design
flaw in the way the kernel handles multicast traffic...
--
Dr.Udo Grabowski Inst.f.Meteorology a.Climate Research IMK-ASF-SAT
www-imk.fzk.de/asf/sat/grabowski/ www.imk-asf.kit.edu/english/sat.php
KIT - Karlsruhe Institute of Technology http://www.kit.edu
Postfach 3640,76021 Karlsruhe,Germany T:(+49)721 608-26026 F:-926026
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