6.5.1 Bandwidth at SBSX and HN-I bridges

Read bandwidth on interconnect at SBSX and HN-I bridges

This event counts the number of received data flits at the SBSX, HN-I, and interconnect:

TXDATNumber of TXDAT flits received. This event is a measure of the read data bandwidth.

Calculate the actual read bandwidth as follows:

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Note:

This event is tracked in the DWM, not in the SBSX or HN-I design.

Write bandwidth at SBSX and HN-I bridges

In a similar way to the read actual bandwidth event, this event monitors the number of data flits that the SBSX and HN-I bridges send out, to measure the actual write bandwidth that is received from the interconnect:

RXDAT Number of RXDAT flits dispatched. This event is a measure of the write bandwidth.

Calculate the write bandwidth as follows:

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Note:

This event is tracked in the DWM, not in the SBSX or HN-I design.

Total requested bandwidth at SBSX and HN-I bridges

To improve efficiency when using PMU events and signals, this event combines the read and write bandwidth estimation in a single event by monitoring the number of request flits that an SBSX or HN-I bridge receive:

RXREQ_TOTALNumber of RXREQ flits dispatched. This event is a measure of the total request bandwidth.

Calculate the total bandwidth as follows:

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Note:

This event is tracked in the DWM, not in the SBSX or HN-I design.
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