Henno, Thanks for the quick reply! I just thought of this, tried it, and it failed :) which is good news!
--Laura On Tue, Jan 29, 2013 at 9:58 AM, Henno Kriel <[email protected]> wrote: > Hi Laura > > Number 2 seems the likely scenario. You could test this by muxing the 2 > channels to a single 10GbE to verify this (and use a register to select the > active channel of the mux). If it still fails, 2 holds true. > > Regards > Henno > > > On Tue, Jan 29, 2013 at 5:12 PM, Laura Vertatschitsch > <[email protected]>wrote: > >> Hey Casper, >> >> I compiled a design for the ROACH board using the 11.x toolset and saw >> the resource usage for DSP48Es was "366 out of 640, 57%." >> >> There are many filters in the design, but can be thought of as having two >> identical signal paths. I built each signal path up into 64 bit words >> ready to transmit. One signal path I transmit off the 10 gbe port, the >> other i simply terminated. >> >> Since the compile worked and seemed to not push too many resources to the >> limit, I decided to add a second 10 gbe port to the design for the second >> signal path. now, my design does not fit with the error of "Too many comps >> of type DSP48E." >> >> 1) Could it be that the 10 gbe port and its registers really use a lot of >> DSP48Es? >> >> 2) Is it possible that since in the first design the second signal path >> was eventually terminated, Xilinx just never built it at all and the >> resource usage was misleading? >> >> 3) After the resource usage is printed to the screen, could there be >> anything else that gets added that takes up logic or DSP48Es? >> >> 4) Any other advice about understanding and utilizing the resource usage >> stats? >> >> --Laura >> > > > > -- > Henno Kriel > > DSP Engineer > Digital Back End > meerKAT > > SKA South Africa > Third Floor > The Park > Park Road (off Alexandra Road) > Pinelands > 7405 > Western Cape > South Africa > > Latitude: -33.94329 (South); Longitude: 18.48945 (East). > > (p) +27 (0)21 506 7300 > (p) +27 (0)21 506 7365 (direct) > (f) +27 (0)21 506 7375 > (m) +27 (0)84 504 5050
