From Fedora Project Wiki
Performance observation short cuts for noobs
Introduction
Purpose
Scope
Acronyms, descriptions
References
- http://www.linux-kvm.org/page/Documents
- KVM documentation page.
- [Webcast: When Times Get Tough, The Tough Get Tuning]
- Dee-Ann LeBlanc of Splunk shows how you can get better performance from your hardware without throwing dollars at it.
Open issues
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
Storage
Network
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
- 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
- set the masks
- See also: [Classes (Masks)]
- ./xen/include/public/trace.h
- ./xen/include/asm-x86/hvm/trace.h
- find . | xargs grep HVMTRACE_2D
Administration
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.