大页内存统计

#!/bin/bash  

# 大页内存大小（单位 kB）
HUGE_PAGE_SIZE=1048576  # 1048576KB=1024MB=1GB
# 系统所有进程总HUGE_PAGE
TOTAL_HUGE_PAGE_SIZE=0
#KEYWORDS=Kernel
KEYWORDS=Hugetlb

for PID in /proc/[0-9]*; do  
  PID=${PID##*/}
  # 单个进程总HUGE_PAGE
  PROCESS_HUGE_PAGE_TOTAL=0  
  PROCESS_HUGE_PAGE_INFO=$(cat /proc/${PID}/smaps | grep -v " 0 kB" | grep ${KEYWORDS})

  while read line; do
	# 占用HUGE_PAGE
	PROCESS_HUGE_PAGE_USED=$(echo "$line" | awk '{print $2}')
	PROCESS_HUGE_PAGE_TOTAL=$((PROCESS_HUGE_PAGE_TOTAL + PROCESS_HUGE_PAGE_USED))
  done <<<$PROCESS_HUGE_PAGE_INFO 

  if [[ $PROCESS_HUGE_PAGE_TOTAL -gt 0 ]]; then  
    echo "PID ${PID} is using $PROCESS_HUGE_PAGE_TOTAL kB HugePages."  
	TOTAL_HUGE_PAGE_SIZE=$((TOTAL_HUGE_PAGE_SIZE + PROCESS_HUGE_PAGE_TOTAL))  
  fi
done

echo "Total HugePages used by all processes: $TOTAL_HUGE_PAGE_SIZE kB"