Intel® Trace Analyzer and Collector

Aggregation

Aggregation reduces the amount of data by aggregating events into thread groups and into function groups.

The following aggregation types are discussed in this topic:

  • Thread aggregation

  • Function aggregation

Recording Operating System Counters

Similar to recording of process specific counters, Intel® Trace Collector can record operating system counters, which provide information about a node. In contrast to the process specific counters, OS counters are sampled very infrequently by one background thread per node and thus the overhead is very low. The amount of trace data also increases insignificantly.

By default, recording of OS counters is disabled. To enable it, set the configuration option:

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