[erlang-questions] Gen_UDP Packet Loss

[Michael.K.Schmidt@REDACTED]

Don't you want to adjust the UDP (not TCP) settings? something like

sysctl -w net.inet.udp.recvspace=1048576

I don't know if this still applies, but there is a writeup here on how to
increase maxsockbuf:
http://lists.apple.com/archives/darwin-kernel/2012/Apr/msg00042.html

# tell the system to use more than the
# default 32768 mbufclusters via the ncl boot arg
nvram boot-args="ncl=131072"

(reboot)

sysctl -w kern.ipc.maxsockbuf=16777216
sysctl -w net.inet.udp.recvspace=8388608


Hope that helps,
Mike


erlang-questions-bounces@REDACTED wrote on 07/30/2014 02:24:56 PM:

> Lee Sylvester <lee.sylvester@REDACTED>
> Sent by: erlang-questions-bounces@REDACTED
>
> 07/30/2014 02:24 PM
>
> To
>
> Max Lapshin <max.lapshin@REDACTED>,
>
> cc
>
> "Erlang Users' List" <erlang-questions@REDACTED>
>
> Subject
>
> Re: [erlang-questions] Gen_UDP Packet Loss
>
> Okay, so I’m updating them using
>
> sysctl -w kern.ipc.maxsockbuf=16777216
> sysctl -w net.inet.tcp.sendspace=1048576
> sysctl -w net.inet.tcp.recvspace=1048576
>
> Apparently that produces the same result.  16777216 is reported as
> too large for the maxsockbuf, though.  I’m on a Macbook Pro with
> 8Gb.  :rolleyes:
>
> Lee
>
> On 30 Jul 2014, at 20:06, Max Lapshin <max.lapshin@REDACTED> wrote:
>
> I've spent lot of time to make capturing of 600 mbit/s of udp
> traffic without loss.
>
> Don't specify buffer size in erlang, use system variables.
>
>
>
>
> sysctl -w net.core.rmem_max=1048576
> sysctl -w net.core.rmem_default=1048576
> sysctl -w net.ipv4.udp_mem="8388608 12582912 16777216"
>
>
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