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90 lines
3.6 KiB
90 lines
3.6 KiB
4 years ago
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#!/usr/bin/env bash
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pid=$1
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retries="${2:-0}"
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wait="${3:-1}"
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pid_smaps=""
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function get_meminfo() {
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[ ! -f "/proc/${pid}/smaps" ] \
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&& { echo "[Error] not found $pid smaps file."; echo "Usage: bash $0 Pid Retries Wait, like: bash$0 1234 100 5"; exit 1; } \
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|| pid_smaps=$(cat /proc/${pid}/smaps)
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mem_info=$(cat /proc/meminfo)
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mem_total=$(printf "%s" "${mem_info}"| awk '/^MemTotal:/ {print $2}')
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mem_free=$(printf "%s" "${mem_info}"| awk '/^MemFree:/ {print $2}')
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mem_available=$(printf "%s" "${mem_info}"| awk '/^MemAvailable:/ {print $2}')
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size=$(printf "%s" "${pid_smaps}" | awk '/^Size/{sum += $2}END{print sum}')
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rss=$(printf "%s" "${pid_smaps}" | awk '/^Rss/{sum += $2}END{print sum}')
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pss=$(printf "%s" "${pid_smaps}" | awk '/^Pss/{sum += $2}END{print sum}')
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shared_clean=$(printf "%s" "${pid_smaps}" | awk '/^Shared_Clean/{sum += $2}END{print sum}')
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shared_dirty=$(printf "%s" "${pid_smaps}" | awk '/^Shared_Dirty/{sum += $2}END{print sum}')
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private_clean=$(printf "%s" "${pid_smaps}" | awk '/^Private_Clean/{sum += $2}END{print sum}')
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private_dirty=$(printf "%s" "${pid_smaps}" | awk '/^Private_Dirty/{sum += $2}END{print sum}')
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swap=$(printf "%s" "${pid_smaps}" | awk '/^Swap/{sum += $2}END{print sum}')
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swap_pss=$(printf "%s" "${pid_smaps}" | awk '/^SwapPss/{sum += $2}END{print sum}')
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}
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count=0
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while [ $count -lt $retries ] ; do
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get_meminfo
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echo "Date: $(date +'%Y-%m-%d %T') MemTotal: $((mem_total/1024))MB MemFree: $((mem_free/1024))MB MemAvailable: $((mem_available/1024))MB RSS: $((${rss}/1024))MB PSS: $((${pss}/1024))MB USS: $(( (${private_clean} + ${private_dirty}) /1024 ))MB"
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sleep $wait
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count=$(($count + 1))
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done
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get_meminfo
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cat << EOF
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# OS meminfo
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MemTotal：内存总数
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MemFree：空闲内存数
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MemAvailable：可用内存数,包括cache/buffer、slab
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# Process smaps
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Size：表示该映射区域在虚拟内存空间中的大小。
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Rss： 表示该映射区域当前在物理内存中占用了多少空间
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Rss=Shared_Clean+Shared_Dirty+Private_Clean+Private_Dirty
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Pss： 该虚拟内存区域平摊计算后使用的物理内存大小(有些内存会和其他进程共享，例如mmap进来的)
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实际上包含下面private_clean+private_dirty，和按比例均分的shared_clean、shared_dirty。
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Uss: Unique Set Size 进程独自占用的物理内存（不包含共享库占用的内存）
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USS=Private_Clean+Private_Dirty
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Shared_Clean： 和其他进程共享的未被改写的page的大小
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Shared_Dirty： 和其他进程共享的被改写的page的大小
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Private_Clean： 未被改写的私有页面的大小。
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Private_Dirty： 已被改写的私有页面的大小。
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Swap： 存在于交换分区的数据大小(如果物理内存有限，可能存在一部分在主存一部分在交换分区)
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SwapPss: 计算逻辑就跟pss一样，只不过针对的是交换分区的内存。
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Pid: ${pid}
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Cmd: $(tr -d '\0' < /proc/${pid}/cmdline | cut -c1-80)
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User: $(id -nu < /proc/${pid}/loginuid )
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Threads: $(awk '/Threads:/ {print $2}' /proc/${pid}/status)
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File: /proc/${pid}/smaps
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# Os meminfo
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MemTotal: ${mem_total} KB
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MemFree: ${mem_free} KB
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MemAvailable: ${mem_available} KB
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# Process smaps
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Size: ${size} KB
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RSS: ${rss} kB
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PSS: ${pss} kB
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Shared_Clean: ${shared_clean} kB
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Shared_Dirty: ${shared_dirty} kB
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Private_Clean: ${private_clean} kB
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Private_Dirty: ${private_dirty} kB
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Swap: ${swap} kB
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SwapPss: ${swap_pss} kB
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USS: ${private_clean} + ${private_dirty} = $(( ${private_clean} + ${private_dirty} )) kB
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EOF
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