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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Dee-Ann LeBlanc of Splunk shows how you can get better performance from your hardware without throwing dollars at it.

Installing the packages needed

yum install sysstat

This contains 'sar' and 'iostat'

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

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

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