PMU Multievent

Table of Contents

• Introduction
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example demonstrates the usage of the R5 PMU Driver. The PMU supports three event counters in additional to the cycle counter. So in total we could profile a block of code / or a function for four metrics. The cycle counter is a dedicated counter, but the other three are configurable for various PMU events. In this example, we configure the counters to count these events:

• ICache Miss
• DCache Miss
• DCache Access

After profiling the above events, we can change events to following events to count these events:

• Branch instructions executed
• Branch Misses
• Instructions executed

Supported Combinations

Parameter	Value
CPU + OS	wkup-r5fss0-0 freertos
Toolchain	ti-arm-clang
Board	am62px-sk
Example folder	examples/drivers/pmu/pmu_multievent

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
• Please select the UART port used for console as mentioned in Setup UART Terminal

See Also

UART

Sample Output

Shown below is a sample output when the application is run, Please note that application prints in both CCS and UART console.

UART Console:

[PMU Multievent] Starting...
Icache miss, Dcache access, Dcache miss...
CRC Value: 37090
Profile Point: Fxn2                            
Cycle Count: 94343
ICache Miss Count: 37
DCache Access Count: 5042
DCache Miss Count: 25
 
Profile Point: Fxn1                            
Cycle Count: 4018
ICache Miss Count: 6
DCache Access Count: 1041
DCache Miss Count: 0
 
Profile Point: Fxn2                            
Cycle Count: 94343
ICache Miss Count: 37
DCache Access Count: 5042
DCache Miss Count: 25
 
Profile Point: Fxn3                            
Cycle Count: 10361
ICache Miss Count: 5
DCache Access Count: 2323
DCache Miss Count: 0
 
Branch instructions executed, Branch Misses, Instructions executed...
CRC Value: 37090
Profile Point: Fxn2                            
Cycle Count: 92352
Branch instructions executed Count: 2709
Branch Misses Count: 347
Instructions executed Count: 15069
 
Profile Point: Fxn1                            
Cycle Count: 3844
Branch instructions executed Count: 531
Branch Misses Count: 15
Instructions executed Count: 3141
 
Profile Point: Fxn2                            
Cycle Count: 92352
Branch instructions executed Count: 2709
Branch Misses Count: 347
Instructions executed Count: 15069
 
Profile Point: Fxn3                            
Cycle Count: 10222
Branch instructions executed Count: 1349
Branch Misses Count: 132
Instructions executed Count: 8237
 
[PMU Multievent] Done...
All tests have passed!!