On Wed, Mar 09, 2016 at 03:38:30PM +0100, Marko CupaÄ wrote:
> Hi,
>
[... snip ...]
I've also been trying to get help with queuing. Perhaps we can help
each other out.
I'm using queuing to alleviate bufferbloat and make my son's gaming
performance better. I'm on an asymetric cablemodem connection here in
the U.S. My download is 100M and my upload is 40M. I use a queue
definition similar to this:
queue ext_iface on $ext_if bandwidth 1000M max 1000M qlimit 512
queue download parent ext_iface bandwidth 120M max 120M qlimit 128
default
queue ext_extra parent ext_iface bandwidth 880M max 880M qlimit 384
queue int_iface on $int_if bandwidth 1000M max 1000M qlimit 512
queue upload parent int_iface bandwidth 40M max 40M qlimit 48
queue int_internal parent int_iface bandwidth 960M max 960M qlimit 464
I found several things. Firstly, I found that all queues seem to have
an implied parent queue that based on their interface with a bandwidth of
their
interface speed. Thus:
queue download on $ext_if bandwith 120M default
really meant:
queue download on $ext_if bandwidth 120M max 1000M default
hence my specification of the interface queue.
I'm trying to limit the bufferbloat so the depth of the queue is very
important. I chose values for qlimit that keep the amount of time that
a packet would traverse a queue down at the 0.015ms range:
40Mbit/s / ( 8 bit/byte * 1500 byte/packet) * 0.015s = 50 packets
I used 48 because I'm keen on multiples of 16.
Have you tried anything like this?
--
Chris
__o "All I was trying to do was get home from work."
_`\<,_ -Rosa Parks
___(*)/_(*)____.___o____..___..o...________ooO..._____________________
Christopher Sean Hilton [chris/at/vindaloo/dot/com]
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