Local Cycle Time + Backward Latency
}Local cycle time
}Shortest time to complete a handshake with its
neighbours
}Cycle may involve three neighbours for half-buffers
}Lower-bound on performance
}Equals FL + BL
}Backward latency (BL)
}Time needed to reset before accepting new tokens
}Time between generated output and earliest time of subsequent input
module
BUF(L, R);
parameter
width = 8;
parameter
FL = 2;
parameter
BL = 4;
`INPORT(L,width);
`OUTPORT(R,width);
`USES_CHANNEL
reg [width-1:0] d;
always
begin
`RECEIVE(L,d);
#FL;
`SEND(R,d);
#BL;
end
endmodule
CE-653 - Asynchronous Pipeline
Performance
11/5/2014
5