Re: [casper] SPEAD examples?

2010-11-29 Thread John Ford
> > > hi John, > > you asked about SPEAD FPGA implementations: > > Jason added SPEAD to the packetized correlator. > i'm appending Jason's November 26 update on correlators, > which includes a section on SPEAD. > > also, i think a recent pocket correlator, developed by Zaki, > uses SPEAD. Zaki an

Re: [casper] SPEAD examples?

2010-11-29 Thread Jouko Ritakari
Hi all, On Mon, 29 Nov 2010, Aaron Parsons wrote: I think it might be appropriate to look a little closer at SPEAD before jumping to conclusions. SPEAD is a self-describing, data-streaming protocol. It has very little in the way of flow management because it is meant to sit on top of other co

Re: [casper] SPEAD examples?

2010-11-29 Thread Aaron Parsons
I think it might be appropriate to look a little closer at SPEAD before jumping to conclusions. SPEAD is a self-describing, data-streaming protocol. It has very little in the way of flow management because it is meant to sit on top of other communications layers (e.g. TCP/UDP/files/unix pipes/MPI

Re: [casper] SPEAD examples?

2010-11-29 Thread Dan Werthimer
hi John, you asked about SPEAD FPGA implementations: Jason added SPEAD to the packetized correlator. i'm appending Jason's November 26 update on correlators, which includes a section on SPEAD. also, i think a recent pocket correlator, developed by Zaki, uses SPEAD. Zaki and Aaron have also

Re: [casper] SPEAD examples?

2010-11-29 Thread Jouko Ritakari
Hi all, Had to look the spead protocol up, found some viewgraphs. IMHO, there were two warning signs: TCP header and small number of header bytes. A rate-based protocol like UDT might be more appropriate. And I have seen so many times what happens when people try to save a few bytes out of 150

[casper] SPEAD examples?

2010-11-29 Thread John Ford
Hi all. Do any of you have any xilinx designs that implement SPEAD protocol packets over 10 GbE? John