2023-02-14 16:38:43 +01:00
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# Paraver trace
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Paraver traces are handled by the top level module `pvt` (Paraver trace), which
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in turn uses the `prv`, `pcf` and `prf` to control the trace events, type
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definitions and row names (in that order).
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Traces must be initialized with the number of rows and a name by calling
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`pvt_open()`.
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The emulation time must be updated with `pvt_advance()` prior to emitting any
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event, so they get the update clock in the trace.
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## Connecting channels
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A channel can be connected to each row in a trace with `prv_register()`, so the
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new values of the channel get written in the trace. Only null and int64 data
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values are supported for now.
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2024-09-13 10:56:50 +02:00
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The emission phase is controlled by the [patch bay](patchbay.md) and runs all
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2023-02-14 16:38:43 +01:00
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the emit callbacks at once for all dirty channels.
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2023-03-21 09:45:03 +01:00
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## Duplicate values
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When a channel feeds a duplicated value, it causes an error by default. The
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behavior of each row when a duplicate value is found can be controlled by the
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`flags` in `prv_register()`:
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- `PRV_EMITDUP` will emit the duplicate values from the channel to the trace.
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- `PRV_SKIPDUP` ignore any duplicate values and don't emit them.
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