Intel CONTROLLERS 413808 - Manual (Page 738)

Intel ® 413808 and 413812—PMON Unit
Intel ® 413808 and 413812 I/O Controllers in TPER Mode
Developer’s Manual October 2007
738 Order Number: 317805-001US
Example 10. Queue Depth Histogram Example
This example demonstrates how to measure the current fill level (depth) of a particular
queue.
No block diagram for this example.
Table 484. Queue Depth Histogram Example
Opcode Target Counter Increment Event Decrement Event Trigger Event
Write Threshold (bucket size) in Data
Register
0
Write Event Register 0 Queue Enter Queue Exit
Write Event Register 1 Threshold Event 0
Start (CC is =) 0 Queue Empty
Start 1 Immed (000h)
-- Run Workload --
Sample 1 Immed (000h)
Read Data Register 0
-- Repeat entire sequence with new bucket
size --