User Guide

Contents

reduce-lock-contention

Examine specified annotated sites for opportunities to reduce lock contention or find deadlocks in a Suitability report.
GUI Equivalent
Suitability
Lock Contention

Syntax

--reduce-lock-contention
=
<string>
Arguments
<string>
is a comma-separated list of annotated sites (no spaces).
Default
No default argument
Actions Modified
report
=suitability
Usage
Lock contention is the time one thread spends waiting for a lock to be released while another thread holds that lock (as opposed to lock overhead, which is the time spent creating, destroying, acquiring, and releasing locks). You can reduce lock contention by using different locks for unrelated data when you convert to a parallel framework.
Usage of this option simulates parallel execution with the assumption that lock contention is zero for a specified site.
Example
Generate a Suitability report. Examine the annotated sites
myAnnotatedSiteJ
and
myAnnotatedSiteX
for opportunities to reduce lock contention. Write the report to
stdout
.
$ advisor --report=suitability --project-dir=./advi --reduce-lock-contention=myAnnotatedSiteJ,myAnnotatedSiteX

Product and Performance Information

1

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