diff options
Diffstat (limited to 'package/system/zram-swap/files/zram.init')
| -rwxr-xr-x | package/system/zram-swap/files/zram.init | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init index 6b5714bb1c..ae432f3b00 100755 --- a/package/system/zram-swap/files/zram.init +++ b/package/system/zram-swap/files/zram.init @@ -2,17 +2,21 @@ START=15 -ram_size() +EXTRA_COMMANDS="compact status" +EXTRA_HELP=" compact trigger compaction for all Z-RAM swap dev's + status print out status information & statistics about Z-RAM swap devices" + +ram_getsize() { local line while read line; do case "$line" in MemTotal:*) set $line; echo "$2"; break ;; esac; done </proc/meminfo } -zram_size() # in megabytes +zram_getsize() # in megabytes { local zram_size="$( uci -q get system.@system[0].zram_size_mb )" - local ram_size="$( ram_size )" + local ram_size="$( ram_getsize )" if [ -z "$zram_size" ]; then # e.g. 6mb for 16mb-routers or 61mb for 128mb-routers @@ -106,9 +110,9 @@ zram_comp_streams() fi } +#print various stats info about zram swap device zram_stats() { - #print various stats info about zram swap device local zdev="/sys/block/$( basename "$1" )" printf "\nGathering stats info for zram device \"$( basename "$1" )\"\n\n" @@ -143,12 +147,16 @@ zram_compact() # compact zram device (reduce memory allocation overhead) local zdev="/sys/block/$( basename "$1" )" - old_mem_used=`awk '{print $3}' <$zdev/mm_stat` - old_overhead=`awk '{print $3-$2}' <$zdev/mm_stat` + local old_mem_used=`awk '{print $3}' <$zdev/mm_stat` + local old_overhead=`awk '{print $3-$2}' <$zdev/mm_stat` - echo "" - echo "Compacting zram device..." echo 1 > $zdev/compact + + # If not running interactively, than just return + [ -z "$PS1" ] && return 0 + + echo "" + echo "Compacting zram device $zdev" awk -v old_mem="$old_mem_used" -v ovr="$old_overhead" 'BEGIN { fmt = "%-25s - %.1f %s\n" } { printf fmt, "Memory usage reduced by ", (old_mem-$3)/1024/1024, "MiB" printf fmt, "Overhead reduced by", (ovr-($3-$2))/ovr*100, "%" }' <$zdev/mm_stat @@ -156,23 +164,13 @@ zram_compact() start() { - local zram_size="$( zram_size )" - local zram_dev - if [ $( grep -cs zram /proc/swaps ) -ne 0 ]; then logger -s -t zram_start -p daemon.notice "[OK] zram swap is already mounted" - # If not running interactively, than just quit - [ -z "$PS1" ] && return 1 - - # show memory stats and compact all zram swaps - for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do { - zram_compact "$zram_dev" - zram_stats "$zram_dev" - } done - return + return 1 fi - zram_dev="$( zram_getdev )" + local zram_size="$( zram_getsize )" + local zram_dev="$( zram_getdev )" zram_applicable "$zram_dev" || return 1 logger -s -t zram_start -p daemon.debug "activating '$zram_dev' for swapping ($zram_size MegaBytes)" @@ -200,3 +198,18 @@ stop() } done } +# show memory stats for all zram swaps +status() +{ + for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do { + zram_stats "$zram_dev" + } done +} + +# trigger compaction for all zram swaps +compact() +{ + for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do { + zram_compact "$zram_dev" + } done +} |