Intel® VTune™ Profiler User Guide

User Guide

Contents

Profile Targets on a Xen* Virtualization Platform

Configure
Intel® VTune™
Profiler
 and your system with a Xen virtualization platform for performance profiling.
You can use the
VTune
Profiler
 for hardware event-based analysis either for a guest OS (DomU), a privileged OS (Dom0), or all the domains at once.

Configure a Target System for Analysis

Before running a
VTune
Profiler
 analysis on a system with a Xen virtualization platform, enable full-platform CPU monitoring required for event-based sampling analysis:
$ echo "all" > /sys/hypervisor/pmu/pmu_mode
To get CPU profiling data on a virtualized system (Dom0 and the hypervisor only), enter:
$ echo "hv" > /sys/hypervisor/pmu/pmu_mode
  • Some configurations do not support the
    all
     mode.
  • CPU events virtualization requires root privileges.
  • Unlike CPU profiling, GPU profiling in the
    hv
     mode is available for all domains (Dom0 and DomU).

Configure
VTune
Profiler
 for Xen Platform-Wide Analysis

Prerequisites
: Make sure the Dom0 remote analysis target is accessible via the Ethernet/SSH connection from your host without any password.
Create a
VTune
Profiler
 project and specify options for your remote target as follows:
  1. Select the
    remote Linux (SSH)
     type of the target system on the
    WHERE
     pane.
  2. Specify
    SSH destination
     details for your Dom0 remote target system.
  3. Select the
    Profile System
     target type to enable platform-wide performance monitoring (
    WHAT
     pane).
    As soon as you set up the target options, the
    VTune
    Profiler
     attempts to automatically install required components on the specified remote system. If, for some reason, the system cannot be reached,
    VTune
    Profiler
     displays an error message. To troubleshoot this potential problem, make sure the default path specified as the
    VTune
    Profiler
     installation on the remote system
     in the
    WHERE
     pane is accessible, writable, and has 200Mb of available space. If not, specify another location, for example:
    /tmp
    .
As soon as the connection is established and the target is configured, select an analysis type supported on the Xen virtualization platform from the
HOW
 pane:

Product and Performance Information

1

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