performing {HEAD ~ calibration} on {TAIL ~ flex input output signals} on a first cell processor of said plurality of cell processors and said first input output controller of said plurality of input output controllers, 
on
performing { HEAD ~ calibration } on { TAIL ~ flex input output signals } on a first cell processor of said plurality of cell processors and said first input output controller of said plurality of input output controllers ,
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH