User and Reference Guide

Contents

PCTRACE-FAST

Syntax
PCTRACE-FAST [on|off]
Variable
VT_PCTRACE_FAST
Default
on
for performance tracing,
off
for correctness checking
Description
Controls whether the fast, but less reliable stack unwinding is used or the slower, but less error-prone unwinding through
libunwind
. The fast unwinding relies on frame pointers, therefore all code must be compiled accordingly for it to work correctly.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.