Intel® Trace Analyzer and Collector

VT_Region Class Reference

Description

This is similar to VT_Function, but should be used to mark regions within a function.

The difference is that source code locations can be provided for the beginning and end of the region, and one instance of this class can be used to mark several regions in one function.

Constructor & Destructor Documentation

VT_Region()

Default constructor. Does not start a region.

CHECK-TIMEOUT

Syntax

CHECK-TIMEOUT <time>

Variable

VT_CHECK_TIMEOUT

Default

5s

Description

After stopping one process because it cannot or is not allowed to continue, the other processes are allowed to continue for this amount of time to see whether they run into other errors.

PCTRACE

Syntax

PCTRACE [on|off|<trace levels>|<skip levels>:<trace levels>]

Variable

VT_PCTRACE

Default

off for performance analysis, on otherwise

SYNCED-CLUSTER

Syntax

SYNCED-CLUSTER [on|off]

Variable

VT_SYNCED_CLUSTER

Default

off

Description

Use this setting to override whether Intel Trace Collector treats the clock of all processes anywhere in the cluster as synchronized or not. Whether Intel Trace Collector makes that assumption depends on the selected time source.

Comparing Two Trace Files

Comparison View calculates the exact differences and speedups between two runs or between two ranges of the same run.

To open a Comparison View for two trace files, open the files and choose View > Compare in one of the trace file views. You can also use the toolbar button.

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