65 lines
1.2 KiB
Bash
65 lines
1.2 KiB
Bash
#!/bin/bash
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##
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# Show stats for all (initialized) zram devices
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# Author: Nitin Gupta
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#
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stats=(
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"disksize"
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"num_reads"
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"num_writes"
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"invalid_io"
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# "discard"
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"notify_free"
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"zero_pages"
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"orig_data_size"
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"compr_data_size"
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"mem_used_total"
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)
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function get_stat()
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{
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local _dev=$1
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local _stat=$2
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cat $dev/$_stat
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}
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function show_stat()
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{
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local _name=$1
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local _val=$2
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local _unit=$3
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printf "%-16s %11d %s\n" "$_name:" "$_val" "$_unit"
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}
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#for dev in `find /sys/block -name 'zram*'`; do
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find /sys/block -name 'zram*' | while read dev; do
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orig=0
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compr=0
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total=0
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is_init=$(get_stat $dev initstate)
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# Show stats only for initialized devices
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[ "$is_init" == 1 ] || continue
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echo "$dev"
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for stat in "${stats[@]}"; do
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val=$(get_stat $dev $stat)
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eval __$stat=$val # ex: __disksize=$disksize
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show_stat $stat $val
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done
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[ "$__orig_data_size" == "0" ] && continue;
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cratio=$(echo "print $__compr_data_size*100/$__orig_data_size" | python | tr -d '\n')
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show_stat "avg_compr_ratio" $cratio "%"
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# Memory wasted due to fragmentation, metadata overhead etc.
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ovhd=$(echo "print ($__mem_used_total - $__compr_data_size) * 100 / \
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$__compr_data_size" | python | tr -d '\n')
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show_stat "mem_overhead" $ovhd "%"
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echo
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done
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