Intel CONTROLLERS 413808 - Manual (Page 737)

Intel ® 413808 and 413812 I/O Controllers in TPER Mode
October 2007 Developer’s Manual
Order Number: 317805-001US 737
PMON Unit—Intel ® 413808 and 413812
16.4.4 Queue Analysis
Example 9. Queue Depth Example
This example demonstrates how to measure the current fill level (depth) of a particular
queue.
Gathering queue depth information, as in Example 9 , is probably more useful when it is
presented in a histogram. Example 10 on page 738 outlines the command sequences
required to generate such a histogram. See the Head of Queue Histogram example in
another section for more details on how to create histograms.
Table 483. Hardware Event Based Event Counting Example
Opcode Target Counter Increment Event Decrement Event Trigger Event
Write Event Register 0 Queue enter Queue Exit
Start (CC is =) 0 Immed (000h)
Sample 0 Immed (000h)
Read Data Register 0
Figure 113. Block Diagram & Waveforms of Time Based Sampling Example
B6303-01