4.11. Synchronization

Trace systems often store trace data in a circular buffer, meaning that the initial output from a PTM might be overwritten before the trace is analyzed. In addition, a trace decompression tool might start decompressing at an arbitrary point in the output trace stream. Therefore, trace decompression tools must determine:

This is done using the following synchronization packets:

A-sync

For alignment synchronization.

I-sync

For instruction synchronization.

T-sync

For timestamp synchronization. T-sync packets are a form of the timestamp packet. See Timestamp synchronization.

The following sections describe the different PFT synchronization operations:

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