Performance observation short cuts for noobs

Performance observation short cuts for noobs

Introduction

References

http://www.linux-kvm.org/page/Documents

KVM documentation page.

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Installing the packages needed

yum install sysstat

This contains 'sar' and 'iostat'

Tools

Operating Environment

perf

Performance analysis tools for Linux.

• e.g. perf top

Virtualiser

• http://www.xen.org/files/xensummit_intel09/xen-debugging.pdf
• http://xenbits.xensource.com/ext/xenalyze.hg
• http://wiki.xensource.com/xenwiki/XendInternalsDebugging

xentrace

See also: [xentrace example]

xentrace_format

kmv_stat

in qemu-kvm-tools package.

Configuring the xentrace

1. get the xentrace_formats file
   • extract the tools/xentrace/formats file from the source code.
   • Get the source code at: http://www.xen.org/products/xen_archives.html
2. set the masks
   • See also: [Classes (Masks)]
   • ./xen/include/public/trace.h
   • ./xen/include/asm-x86/hvm/trace.h
     • find . | xargs grep HVMTRACE_2D

Scratch pad

INSTALLATION

 yum install sysstat
   sar and iostat

XOSview GKRellM gnuplot

vmstat mpstat -P ALL top sar iostat ps

RAM vmstat -s free

cpu sar -P ALL -u ALL 10 10

NETWORK netstat

-i
-a
-s
-f

iostat ttcp

IO Performance iostat

-x 

vmstat sar nfsstat bonnie++

TUNING MME sysctl and sysctl.conf

Performmance measurements on various virtualization soulutions

• Virtual machines performance comparison: vmware vs virtualbox vs kvm vs xen - I/O benchmarks: Windows 2008 installation time
• Optimizing Network Virtualization in Xen

Key kernel statistics

CPU

Softirqs

Backen interrupt handlers.