29 lines
980 B
Bash
29 lines
980 B
Bash
#!/bin/bash
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MEMORY=24576
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## Calculate number of hugepages to allocate from memory (in MB)
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HUGEPAGES="$(($MEMORY/$(($(grep Hugepagesize /proc/meminfo | awk '{print $2}')/1024))))"
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## Node to allocate on (node1 for this VM)
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NODESPATH=/sys/devices/system/node/node1
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echo "Allocating hugepages..."
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echo $HUGEPAGES > $NODESPATH/hugepages/hugepages-2048kB/nr_hugepages
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ALLOC_PAGES=$(cat $NODESPATH/hugepages/hugepages-2048kB/nr_hugepages)
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TRIES=0
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while (( $ALLOC_PAGES != $HUGEPAGES && $TRIES < 1000 ))
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do
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echo 1 > /proc/sys/vm/compact_memory ## defrag ram
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echo $HUGEPAGES > $NODESPATH/hugepages/hugepages-2048kB/nr_hugepages
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ALLOC_PAGES=$(cat $NODESPATH/hugepages/hugepages-2048kB/nr_hugepages)
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echo "Succesfully allocated $ALLOC_PAGES / $HUGEPAGES"
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let TRIES+=1
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done
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if [ "$ALLOC_PAGES" -ne "$HUGEPAGES" ]
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then
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echo "Not able to allocate all hugepages. Reverting..."
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echo 0 > $NODESPATH/hugepages/hugepages-2048kB/nr_hugepages
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exit 1
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fi
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