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|
#!/bin/sh
error() {
echo "$@" 1>&2
}
get_procmeminfo() {
for f in "${@}"; do
[ -f "${f}" ] || continue
cat "${f}" | egrep "^MemAvailable:" | while read _ chunks size; do
case "${size}" in
kB)
echo $((chunks * 1024))
;;
*)
error "ignoring unknown size specifier '${size}"
;;
esac
done
done
}
get_sysfs_cgroups() {
for f in "${@}"; do
[ -f "${f}" ] || continue
cat "${f}"
done
}
get_memlimits() {
get_procmeminfo /proc/meminfo
get_sysfs_cgroups /sys/fs/cgroup/memory/memory.limit_in_bytes /sys/fs/cgroup/memory.max
}
filter_memlimits() {
local MB=$((1024*1024))
egrep "^[0-9]*$" | grep . | while read num; do
if [ ${num} -ge ${MB} ]; then
echo $num
error "limit ${num} bytes"
fi
done
}
get_memlimits | filter_memlimits | sort -n | head -1
|
