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rpfilomeno/Find Optimal Load Average

Created March 12, 2015 15:31
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Linux Performance Testing
Raw
Find Optimal Load Average
# less /proc/cpuinfo | grep "physical id" | sort|uniq | wc -l
2
# less /proc/cpuinfo | grep "core id" | sort|uniq | wc -l
1
Optimal load average (100% utilization) = 2.0
(The "Red line" load average = 5.0 per processor)
Raw
Process Profiling Using Perf
Profiling a command/script/application:
# perf stat <command>
Profiling a process:
# ps ax | fgrep <process-name>
# perf stat -p <process-id>
(press Ctrl+C to stop and display result)
# perf stat -p <process-id> sleep <x-seconds>
(profiles for X seconds
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