No versions of iperf I’ve seen use sendto() for UDP…..
And Yes….I modified iperf and took measurements…..
After my UDP application could not achieve the iperf UDP throughput….
which subsequently is really only UDP by the protocol ID in the IP header….
All other protocol layers are connection-oriented…..socket connect/listen/etc…
From: Bob McMahon [mailto:bob.mcma...@broadcom.com]
Sent: Friday, January 13, 2017 1:15 PM
To: Hoshall, Paul
Cc: iperf-users@lists.sourceforge.net; Gibbs, James
Subject: Re: [Iperf-users] When will real UDP, connectionless (sendto(),
recvfrom(), broadcast) be iperf'd?
Which version of iperf are you using? Do you have any measurements for UDP
using sendto() vs send() with bind() and connect()? I haven't seen any
performance difference on my systems but haven't really spent much time profile
it either.
http://man7.org/linux/man-pages/man7/udp.7.html
Bob
On Fri, Jan 13, 2017 at 5:52 AM, Hoshall, Paul
<hos...@textronsystems.com<mailto:hos...@textronsystems.com>> wrote:
Iperf does a connect with the UDP socket first….then sends() to a specific
address
Sendto ( broadcast ) is way slower than send()…..in Linux and Windows
From: Bob McMahon
[mailto:bob.mcma...@broadcom.com<mailto:bob.mcma...@broadcom.com>]
Sent: Thursday, January 12, 2017 5:48 PM
To: Hoshall, Paul
Cc:
iperf-users@lists.sourceforge.net<mailto:iperf-users@lists.sourceforge.net>;
Gibbs, James
Subject: Re: [Iperf-users] When will real UDP, connectionless (sendto(),
recvfrom(), broadcast) be iperf'd?
Not sure why this is needed. I think a UDP socket with bind() using send() is
equivalent to sendto() with respect to both being connectionless at the network
layer. Are you trying to test system or OS calls? If not, I think a bind for
UDP should be fine.
Bob
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