65 lines
3.3 KiB
Bash
65 lines
3.3 KiB
Bash
#!/bin/bash
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#set -x
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[ "$1" = '--oneshot' ] && ONESHOT="yes" || ONESHOT="no"
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PAGESIZE=30
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SLEEP_TIME=3
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[ $ONESHOT = "no" ] && printf " Free Shmem Mapped+Cached Anon Pagetables KernelStack Buffers Slab SwpCache HP Used HP Rsvd HP Free Unknown %%\n"
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ROWCOUNTER=0
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while ( true ); do
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# 1 get meminfo
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MEMINFO=$( cat /proc/meminfo )
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# 2 get relevant data
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MEMTOTAL=$( echo "$MEMINFO" | awk '/^MemTotal/ { print $2 }')
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MEMFREE=$( echo "$MEMINFO" | awk '/^MemFree/ { print $2 }')
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KERNELSTACK=$( echo "$MEMINFO" | awk '/^KernelStack/ { print $2 }')
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BUFFERS=$( echo "$MEMINFO" | awk '/^Buffers/ { print $2 }')
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CACHED=$( echo "$MEMINFO" | awk '/^Cached/ { print $2 }')
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PAGETABLES=$( echo "$MEMINFO" | awk '/^PageTables/ { print $2 }')
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SHMEM=$( echo "$MEMINFO" | awk '/^Shmem:/ { print $2 }')
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ANONPAGES=$( echo "$MEMINFO" | awk '/^AnonPages/ { print $2 }')
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SLAB=$( echo "$MEMINFO" | awk '/^Slab/ { print $2 }')
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SWAPCACHED=$( echo "$MEMINFO" | awk '/^SwapCached/ { print $2 }')
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# hugepages are expressed in pages, not KB
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HP_TOTAL=$( echo "$MEMINFO" | awk '/^HugePages_Total/ { print $2 }')
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HP_RSVD=$( echo "$MEMINFO" | awk '/^HugePages_Rsvd/ { print $2 }')
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HP_FREE=$( echo "$MEMINFO" | awk '/^HugePages_Free/ { print $2 }')
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HP_SIZE=$( echo "$MEMINFO" | awk '/^Hugepagesize/ { print $2 }')
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# swap
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SWAP_TOTAL=$( echo "$MEMINFO" | awk '/^SwapTotal/ { print $2 }')
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SWAP_FREE=$( echo "$MEMINFO" | awk '/^SwapFree/ { print $2 }')
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# 3 define final data
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# MEMTOTAL
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# MEMFREE
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# KERNELSTACK
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# BUFFERS
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CACHED=$(( $CACHED-$SHMEM ))
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# PAGETABLES
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# SHMEM
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# ANONPAGES
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# SLAB
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# SWAPCACHED
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HP_USED_KB=$(( ($HP_TOTAL-$HP_FREE)*$HP_SIZE ))
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HP_RSVD_KB=$(( $HP_RSVD*$HP_SIZE ))
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HP_REALFREE_KB=$(( ($HP_FREE-$HP_RSVD)*$HP_SIZE ))
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SWAP_USED=$(( $SWAP_TOTAL-$SWAP_FREE ))
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SWAP_PCT=$(( ($SWAP_USED*100)/$SWAP_TOTAL ))
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#
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ACCT_FOR_MEM_TOTAL=$(( $MEMFREE+$KERNELSTACK+$BUFFERS+$CACHED+$PAGETABLES+$SHMEM+$MAPPED+$ANONPAGES+$SLAB+$SWAPCACHED+$HP_USED_KB+$HP_RSVD_KB+$HP_REALFREE_KB ))
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UNACCT_FOR=$(( $MEMTOTAL-$ACCT_FOR_MEM_TOTAL ))
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UA_PCT=$(( ($UNACCT_FOR*100)/$MEMTOTAL ))
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if [ $ONESHOT = "no" ]; then
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# visualize
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printf "%14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %14d %3d\n" $MEMFREE $SHMEM $CACHED $ANONPAGES $PAGETABLES $KERNELSTACK $BUFFERS $SLAB $SWAPCACHED $HP_USED_KB $HP_RSVD_KB $HP_REALFREE_KB $UNACCT_FOR $UA_PCT
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sleep $SLEEP_TIME
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let ROWCOUNTER++
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if (( $ROWCOUNTER % $PAGESIZE == 0 )); then
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printf " Free Shmem Mapped+Cached Anon Pagetables KernelStack Buffers Slab SwpCache HP Used HP Rsvd HP Free Unknown %%\n"
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fi
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fi
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if [ $ONESHOT = "yes" ]; then
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printf "Free %14d\nShmem %14d\nMapped+Cached%14d\nAnon %14d\nPagetables %14d\nKernelStack %14d\nBuffers %14d\nSlab %14d\nSwpCache %14d\nHP Used %14d\nHP Rsvd %14d\nHP Free %14d\nUnknown %14d (%3d%%)\nTotal memory %14d\n---------------------------\nTotal swp %14d\nUsed swp %14d (%3d%%)\n" $MEMFREE $SHMEM $CACHED $ANONPAGES $PAGETABLES $KERNELSTACK $BUFFERS $SLAB $SWAPCACHED $HP_USED_KB $HP_RSVD_KB $HP_REALFREE_KB $UNACCT_FOR $UA_PCT $MEMTOTAL $SWAP_TOTAL $SWAP_USED $SWAP_PCT
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break
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fi
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done
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