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89 lines
3.6 KiB
89 lines
3.6 KiB
#!/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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