User Guide

  • 2020
  • 06/18/2020
  • Public Content
Contents

memory-access
Command Line Analysis

Memory Access analysis identifies memory-related issues, like NUMA problems and bandwidth-limited accesses, and attributes performance events to memory objects (data structures), which is provided due to instrumentation of memory allocations/de-allocations and getting static/global variables from symbol information.

Syntax

vtune
-collect memory-access [ -knob <
knobName=knobValue
>] [--] <
target
>
For the most current information on available knobs (configuration options) for the Memory Access analysis, enter:
vtune
-help collect memory-access
Example
This example shows how to run the Memory Access analysis on a Linux*
myApplication
app, collect data on dynamic memory objects, and evaluate maximum achievable local DRAM bandwidth before the collection starts:
vtune
-collect memory-access -knob analyze-mem-objects=true -knob dram-bandwidth-limits=true -- home/test/myApplication

What's Next

When the data collection is complete, do one of the following to view the result:

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804