Increasing the MON shim bit rate is the easiest method to reduce the potential for throttling of the controller due to status report transmission. Another method is to increase the buffer depth. The MON shim contains two FIFOs, a transmit buffer and a receive buffer.
There is no need for the buffer depths to be symmetric and little advantage is gained from increasing the depth of the receive buffer. However, increasing the depth of the transmit buffer reduces the potential for throttling of the controller due to status report transmission.
The AMD LogiCORE™ IP FIFO Generator can be used to create replacements for the MON shim FIFOs. The FIFO configuration must be for a common clock (that is, fully synchronous to a single clock) with first word fall through enabled. The data width must be eight, with the depth as great as desired.
TIP: When making a FIFO replacement, note that an “empty” flag is the logical inverse of a “data present” flag.