> From: [email protected] [mailto:[email protected]] On Behalf > Of Patrick Cable > > ALSO. I am a giant turkey and should clarify that the FPGA is sending > data out at 4.76 mega*bits* a second (my engineer said bytes... iftop > shows bits, someone else confirms). Still nothing that NFS should > choke over, just the writes aren't fast enough. > > A basic diagram of how this works - > Controlling Electronics ---> Modem FPGA -------> desktop --NFS--> > dataserver
Let's have a little more detail ... You have an FPGA board connected to a workstation via ... USB I guess... and the workstation is reading data from the USB and writing to some file or directory. Right? I have another suggestion ... If either your USB or ethernet are hogging channels, such as IRQ's, then only device might be able to work at a time, and while you might benefit by write buffering in memory of the local disks, you might not have that benefit writing to the Ethernet. You should be able to get a little more information about the cause of the problem ... be it hardware or ethernet specific, or nfs-specific ... by trying something like a pipe to "ssh some machine 'cat > somefile'" ... eliminate nfs as a variable, etc. Or try cifs. (I think somebody suggested that before.) It's all about what your diagnostic process is going to be... What's the logic you're going to follow, to isolate the cause of the problem... Or just try a few things and see if they work. ;-) What kind of workstation is it? You might benefit by going into BIOS and disabling all unnecessary devices. (Sound, parallel port, etc.) You might benefit by adding a newer/better usb card or ethernet card. Which could possibly have some feature such as DMA which the old one could possibly be lacking. _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
