Ok, so I manually tweaked the code using the patch info below. I think it
worked, sorta....
I start iperf in server mode (-s) and have a Winblows PC running iperf in
client mode (-c -r ...) . When the client transmits data to the server
(Winblows to RHEL), the CPU for iperf on the server is fine, < 10%. However,
when the server transmits to the client (iperf -r), CPU on the RHEL "server"
(now acting as the "client") is again at 100%. This is only with UDP, when
using tcp CPU is always < 10%.
>From what I recall, when using UDP the CPU on the server (iperf -s) was at
>100% regardless if it was Tx or Rx the data. I'll double-check this though -
>just need to compile the binary with the original source.
I'm finding some other bugs as well, but will review what's been posted to make
sure I don't dupe anything.
I may try hacking some code myself, but that's scary....
G
________________________________
From: Gary Gatten
Sent: Wednesday, March 24, 2010 7:29 PM
To: '[email protected]'
Subject: patch for high CPU with UDP
Hi All, Long time Iperf user, new list member.
Following a number of archive threads I found this patch. Is this still the
correct / current patch for the High CPU load (100%) when using UDP? I
received errors when trying to go directly to the URL: but navigating to it
through sourceforge works and I got the patch below:
http://sourceforge.net/tracker/?func=detail&aid=2006708&group_id=128336&atid=711373
Forgive the basic question, but is there an "easy" way to apply this patch vs.
manually editing the source? Some args to diff?
Thanks! - Gary
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