Intel® VTune™ Profiler User Guide

User Guide

Contents

analyze-kvm-guest

Analyze a KVM guest OS running on your system.
GUI Equivalent
Analyze KVM guest OS
 option in the WHAT pane

Syntax

-analyze-kvm-guest | -no-analyze-kvm-guest
Default
-no-analyze-kvm-guest
Actions Modified
Description
Analyze a KVM guest OS running on your system. For successful analysis, make sure to do the following:
  1. Copy these files from the guest OS to your local file system:
    • /proc/kallsyms
    • /proc/modules
    • any guest OS’s modules of interest (
      vmlinux
      , any
      *.ko
       files, and so on)
  2. Specify a Linux target system for analysis using the option.
  3. Configure your
    VTune
    Profiler
     analysis target by using the, , and options to specify paths to the files copied in step 1 for accurate module resolution.
  4. Configure your collect-with by using the
    knob ftrace-config=<events>
     option to specify Linux FTrace* events tracking IRQ injection process.
Example
Enable a custom hardware event-based sampling collection for the KVM guest OS and collect
irq
,
softirq
,
workq
, and
kvm
 FTrace events: 
vtune --target-system=ssh: user1@172.16.254.1 -collect-with runsa -knob event-config=CPU_CLK_UNHALTED.REF_TSC:sa=3500000,CPU_CLK_UNHALTED.THREAD:sa=3500000,INST_RETIRED.ANY:sa=3500000 –knob enable-stack-collection=true -knob ftrace-config=irq,softirq,workq,kvm -analyze-kvm-guest -kvm-guest-kallsyms=/home/vtune/[guest]/kvm.kallsyms -kvm-guest-modules=/home/vtune/[guest]/kvm.modules --search-dir sym:p=/home/vtune/ --target-pid 9791

Product and Performance Information

1

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