Hi list,
I found this result that [netsend] (tcp) is much faster than [udsend]. It tested on between Mac and Ubuntu connected within eth0. I don't know why udpsend is much slower than netsend.
Normally tcp is slower than udp, but netsend with tcp is faster than udpsend. It's strange.
Who know it, why it causes?
Thanks, Jong
On Fre, 2014-01-17 at 18:48 +0100, Jonghyun Kim wrote:
I found this result that [netsend] (tcp) is much faster than [udsend]. It tested on between Mac and Ubuntu connected within eth0. I don't know why udpsend is much slower than netsend.
What are you measuring: throughput or latency? Maybe you can elaborate on your setup and on how and what you measure.
Roman
I mean latency. I send OSC data in every 10ms over eth0 lan cable. With udpsend and udpreceive there is some latency, but netsend (tcp) was all ok.
Jong
On Fri, Jan 17, 2014 at 10:14 PM, Roman Haefeli reduzent@gmail.com wrote:
On Fre, 2014-01-17 at 18:48 +0100, Jonghyun Kim wrote:
I found this result that [netsend] (tcp) is much faster than [udsend]. It tested on between Mac and Ubuntu connected within eth0. I don't know why udpsend is much slower than netsend.
What are you measuring: throughput or latency? Maybe you can elaborate on your setup and on how and what you measure.
Roman
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On 01/18/2014 03:08 AM, Jonghyun Kim wrote:
I mean latency. I send OSC data in every 10ms over eth0 lan cable. With udpsend and udpreceive there is some latency, but netsend (tcp) was all ok.
could you elaborate? with *anything* that sends data over a network cable you will have "some latency", this is due to the laws of physics (and not something depending on [udpsend] or [netsend]). it is also totally unclear what you mean with "all ok".
so how did you *measure* the (difference in) latency?
i also wonder, why are you comparing udp-transmission with tcp-transmission? wouldn't it make more sense to use [tcpsend] and [netsend] (tcp) OR [udpsend] and [netsend] (udp).
fgamdsr IOhannes
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IOhannes m zmölnig -
Jonghyun Kim -
Roman Haefeli