41 lines
696 B
Plaintext
41 lines
696 B
Plaintext
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#!/bin/sh
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#
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# You need to make sure kernel profiling in enabled by adding
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# following line to kernel configuartion and rebuilding the kernel
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# and modules:
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#
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# options LOCK_PROFILING
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#
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OUTFILE=`mktemp -t kernlock`
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if [ $# -lt 1 ]; then
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echo "Syntax: $0 [ wait_seconds ]"
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exit 1
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fi
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WAITTIME=${1}
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get_prof()
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{
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sysctl -q debug.lock.prof.reset=1
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sysctl -q debug.lock.prof.enable=1
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echo "Profiling lock information for ${WAITTIME} seconds..."
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sleep ${WAITTIME}
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sysctl -q debug.lock.prof.enable=0
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sysctl debug.lock.prof.stats > ${OUTFILE}
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}
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show_prof()
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{
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{
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head -2 ${OUTFILE}
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cat ${OUTFILE} | sort -rn -k4
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} | ${PAGER}
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}
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get_prof
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show_prof
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echo "Raw output save to ${OUTFILE}"
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