Traffic monitoring bus probes are deployed at strategic points in
the system interconnect and support the following capabilities:
- MIPI STP-V2 compliant trace messaging support with global
timestamping support
- Latency Statistics Collection: Statistics on the timeliness
of responses to read requests are collected during a sampling window and then read by a profiling entity
(application thread or encoded into a trace message)
- Throughput Statistics Collection: Statistics on the amount of
data moving across an interface are collected during a sampling window and then read by a profiling entity
(application thread or encoded into a trace message)
- Transaction Trace: Information about specific transactions
occurring at a probed location are captured and encoded into a trace message
- Complex filtering support allows discrimination of traffic
being monitored
- Cross-Trigger support for enabling and disabling probe
monitoring
Table 13-11
details the locations in the system interconnect that are probed:
Table 13-11 Bus Probe Points
Probe Point |
Bus Monitoring Details |
A53SS0 Write Initiator |
Provides visibility to all write requests
initiated by A53SS0 |
A53SS0 Read Initiator |
Provides visibility to all read requests
initiated by A53SS0 |
A53SS0 ACP Target |
Monitors traffic to the A53SS0 ACP
port |
DDR Target |
Monitors traffic to DDR |
GMPC Target |
Monitors traffic to GPMC |
FSS Target |
Monitors traffic to FSS0 |