The Trace buffer size represents the maximum number of cycles of trace that is stored by your trace capture hardware. Typically, you set this to the maximum value that your trace capture hardware can support, but you can reduce it to speed up trace decompression. By default, this field shows the currently configured trace capture hardware buffer size.

When cycle-accurate tracing is disabled, the trace capture hardware typically captures between one and two processor cycles for each instruction captured. If cycle-accurate tracing is enabled, it captures every cycle for which tracing is enabled.

  Some logic analyzer solutions might not support a variable buffer size. These will always store the maximum number of cycles. Conversely, some logic analyzer solutions might support only certain set buffer sizes. These will select the buffer size closest to that requested. Refer to the documentation that accompanies your analyzer for details.