Tècnica del Kernel de linux per estalviar memòria deduplicant.
Per activar el KSM:
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echo 1 > /sys/kernel/mm/ksm/run |
Script ‘ksm_stat’
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#!/bin/bash if [ "`cat /sys/kernel/mm/ksm/run`" -ne 1 ] ; then echo 'KSM is not enabled. Enabling with: echo 1 > /sys/kernel/mm/ksm/run' echo 1 > /sys/kernel/mm/ksm/run exit 1 fi echo Shared memory is $((`cat /sys/kernel/mm/ksm/pages_shared`*`getconf PAGE_SIZE`/1024/1024)) MB echo Saved memory is $((`cat /sys/kernel/mm/ksm/pages_sharing`*`getconf PAGE_SIZE`/1024/1024)) MB if ! `type bc &>/dev/null` ; then echo "bc is missing or not in path, skipping ratio calculation" exit 1 fi if [ "`cat /sys/kernel/mm/ksm/pages_sharing`" -ne 0 ] ; then echo -n "Shared pages usage ratio is ";echo "scale=2;`cat /sys/kernel/mm/ksm/pages_sharing`/`cat /sys/kernel/mm/ksm/pages_shared`"|bc -q echo -n "Unshared pages usage ratio is ";echo "scale=2;`cat /sys/kernel/mm/ksm/pages_unshared`/`cat /sys/kernel/mm/ksm/pages_sharing`"|bc -q fi |
