Re: Congestion Control Modification

2015-05-12 Thread George Neville-Neil

Sounds good.

Best,
George

On 1 May 2015, at 1:21, Karlis Laivins wrote:


Hello George,

Thank you for the tip! I have set up a virtual test environment with 
IMUNES
(interesting tool, by the way) and now I am running validation tests, 
to

see, if the results there are at least similar to those that can be
achieved on a physical testbed.

I will let you know if and when the implementation will be done as I 
will

certainly need objective feedback.

BR,
Karlis

On Fri, May 1, 2015 at 12:06 AM, George Neville-Neil 


wrote:

If you want to run some experiments, though, you could look at 
running PTPd

on 3 servers (master, and two slaves) which will get you decent
synchronization
among the three.  Where decent is less than the typical RTT of a TCP
packet on a
1Gbps LAN.

Best,
George


On 30 Apr 2015, at 14:48, Karlis Laivins wrote:

Yes, you are correct, I meant to write "relative OWD". As David Hayes 
put
it - "Relative OWD measurements are easier, and clock drift is not 
usually

a problem over the time it takes to send and receive an ACK".

Thank you for the correction!

On Thu, Apr 30, 2015 at 4:19 PM, Eggert, Lars  
wrote:


On 2015-4-30, at 15:04, Karlis Laivins  
wrote:



I have yet to solve the issue of
how to get the One Way Delay for the ACK message (the time it 
takes ACK



to


arrive from receiver of the ACK'ed data sender) correctly.



That won't work without synchronized clocks, which you can't really
assume
to be present.

Lars




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[Differential] [Commented On] D1944: PF and VIMAGE fixes

2015-05-12 Thread rodrigc (Craig Rodrigues)
rodrigc added a comment.

In https://reviews.freebsd.org/D1944#46127, @julian wrote:

> in case I didn't point you at this before... 
>  
> http://p4web.freebsd.org/@md=d&cd=//depot/projects/vimage/&cdf=//depot/projects/vimage/porting_to_vimage.txt&c=win@//depot/projects/vimage/porting_to_vimage.txt?ac=22


@julian , I have copied this to:
https://wiki.freebsd.org/VIMAGE/porting-to-vimage

so that this isn't buried in Perforce.


REVISION DETAIL
  https://reviews.freebsd.org/D1944

EMAIL PREFERENCES
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To: nvass-gmx.com, bz, zec, trociny, glebius, rodrigc, kristof, gnn
Cc: julian, robak, freebsd-virtualization, freebsd-pf, freebsd-net
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