Difference between revisions of "Performance"

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apttitude -q -y install iozone3 stress cpuburn sysstat iotop hddtemp
 
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Revision as of 17:04, 26 December 2013


See also

dstat

`dstat` is one of the more valuable tools for monitoring system performance. The output columns can be easily customized for different situations.

The default options are -cdngy. The following are options I commonly use. Many other are described in the manpage.

-c --cpu    system, user, idle, wait, hardware interrupt, software interrupt
-d --disk   disk read, write
-f --full   full listing when using certain options (--cpu, --int, --disk, --net, --swap)
-g --page   page in, out
-i --int    interrupts (see also --full option, --I option, and review /proc/interrupts)
-l --load   load average
-m --mem    memory used, buffers, cache, free
-n --net    network receive, send
-r --io     I/O read, write
-s --swap   swap used, free
-y --sys    system interrupts, context switches
   --vm     vm hard pagefaults, soft pagefaults, allocated, free

`dstat` also has many Python plugins stored in /usr/share/dstat/.

Some statistics require the lm-sensors package. Run `sensors-detect` after installing.

tools

apttitude -q -y install iozone3 stress cpuburn sysstat iotop hddtemp

drive IO testing and stressing

Basic read and write speed testing:

iozone -a -s 1048576 -g 1G -i 0 -i 1 -O

This generates stress on /dev/sda. While this is running you may want to run iostat 1 300 /dev/sda in a different window.

stress --hdd 10 /dev/sda

CPU stress and burn

Install the Ubuntu package cpuburn. For each CPU core your system has run one instance of `burnP6` (for Intel P6 processors). Monitor the CPU usage and system load using `htop` or the tool of your choice. Monitor the temperature using `sensors` or some ACPI tool.

burnP6 &
burnP6 &
burnP6 &
burnP6 &
watch -n1 sensors
killall burnP6