Memory Traffic Generator

This message port receives control messages from a connected Memory Controller block that the requested burst transaction completed. Connect the burstDone output signal from the Memory Controller block to this port. For more information on messages, see Messages.

Dependencies

This port is visible when you select the Show Memory Controller ports parameter.

Data Types: BurstRequest2BusObj

This message port sends a message requesting burst access from the memory controller. Connect this port to the burstReq input port of the Memory Controller block. For more information on messages, see Messages.

Dependencies

This port is visible when you select the Show Memory Controller ports parameter.

Data Types: BurstRequest2BusObj

Select this option when using the Memory Traffic Generator block in a system with a Memory Channel block and a Memory Controller block.

Clear this option when using a Memory Traffic Generator block with one of these specialized memory blocks:

When you use a specialized memory block in your design, that block includes a memory controller which the Memory Traffic Generator block communicates with implicitly and ports are not necessary.

Select between processing subsystem (PS) or programming logic (PL) memory.

Dependencies

To enable this parameter, clear the Show Memory Controller ports parameter.

Choose between a write or read request type for the block to generate. Specify Writer or Reader, respectively.

Generate recurring traffic patterns by setting this value to an integer greater than one.

Specify the size of each burst transaction in bytes. This parameter, along with the width of the datapath (as configured in the configuration parameters), controls the burst length.

For example, if burst size is 256 bytes, and the Memory Channel block is configured with Data width (bits) set to 64 (8 bytes), then Burst length is calculated as 256/8 = 32.

Specify simulation time between burst requests, in seconds.

Dependencies

To enable this parameter, clear the Allow simulation only parameters parameter.

Select this parameter to enable configuration of simulation-only parameters.

Specify simulation time, in seconds, for sending the initial burst request. This value must be a positive real scalar.

Dependencies

To enable this parameter, select Allow simulation only parameters parameter.

Specify the range of simulation time between burst requests with a vector of the form [min max].

min and max must be nonnegative, and max must be greater than min.

To specify a deterministic rate, set the minimum and maximum time between requests to the same value. If you want reproducible randomization, specify a seed in the configuration parameters, on the Hardware Implementation pane. For more information on setting the seed value, see Simulation Settings.

Dependencies

To enable this parameter, select the Allow simulation only parameters parameter.

Select this parameter to wait for a burst-done signal from the previous burst before generating the next burst request. Clear this parameter to generate burst requests regardless of other master traffic. To get a known data rate, clear this parameter.

Select this parameter to view diagnostic messages when the Traffic Generator block drops a packet. Clearing this parameter enhances simulation performance.

Clicking the button opens the Performance Plots for Memory Controller window. You can then select to plot bandwidth, bursts, or latencies. For more information about performance graphs, see Memory Controller Latency Plots.

Dependencies

To enable this parameter, clear the Show Memory Controller ports parameter.