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rss limiter (bash / linux)
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#!/bin/bash | |
CGROUP_ROOT="/sys/fs/cgroup" | |
CGROUP_NAME="rsslimiter" | |
# CGROUP_CPUSHARES="512" | |
# CGROUP_BLKIO_THROTTLE_READ_BPS="8:0 $((100*1024*1024)),8:16 $((100*1024*1024))" | |
CGROUP_MAXMEM="$((32 * 1024 * 1024))" # in bytes | |
cgroup_init() | |
{ | |
[ -z "${CGROUP_NAME}" ] && return | |
CGROUP_BLK_PATH="$CGROUP_ROOT/blkio/$CGROUP_NAME" | |
CGROUP_CPU_PATH="$CGROUP_ROOT/cpu/$CGROUP_NAME" | |
CGROUP_MEM_PATH="$CGROUP_ROOT/memory/$CGROUP_NAME" | |
# We assume /cgroup is already mounted obviously ;) | |
# Create cgroup if not already created | |
[ -d "$CGROUP_BLK_PATH" ] || mkdir "$CGROUP_BLK_PATH" | |
[ -d "$CGROUP_CPU_PATH" ] || mkdir "$CGROUP_CPU_PATH" | |
[ -d "$CGROUP_MEM_PATH" ] || mkdir "$CGROUP_MEM_PATH" | |
[ ! -f "${CGROUP_BLK_PATH}/tasks" ] && (echo "No cgroup blkio support."; return 1) | |
[ ! -f "${CGROUP_CPU_PATH}/tasks" ] && (echo "No cgroup cpu support."; return 1) | |
[ ! -f "${CGROUP_MEM_PATH}/tasks" ] && (echo "No cgroup mem support."; return 1) | |
# Setup limits | |
if [ ! -z "$CGROUP_CPU_SHARES" ]; then | |
echo $CGROUP_CPU_SHARES > ${CGROUP_CPU_PATH}/cpu.shares | |
fi | |
if [ ! -z "$CGROUP_BLKIO_THROTTLE_READ_BPS" ]; then | |
OIFS="$IFS"; IFS=","; for i in $CGROUP_BLKIO_THROTTLE_READ_BPS; do | |
echo $i > ${CGROUP_BLKIO_PATH}/blkio.throttle.read_bps_device | |
done; IFS=$OIFS | |
fi | |
if [ ! -z "$CGROUP_MAXMEM" ]; then | |
echo $CGROUP_MAXMEM > ${CGROUP_MEM_PATH}/memory.limit_in_bytes | |
fi | |
echo $$ > $CGROUP_CPU_PATH/tasks | |
echo $$ > $CGROUP_BLK_PATH/tasks | |
echo $$ > $CGROUP_MEM_PATH/tasks | |
return 0 | |
} | |
echo "Setting up CGROUP limits..." >&2 | |
cgroup_init | |
python3 -c 'import time; x=bytearray(1024 * 1024 * 28); time.sleep(5) |
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