我正在寻找一些工具,它将在结束后通过单个进程转储整个磁盘I / O.
到目前为止,我的发现是： –
> iotop =它实时显示每个进程的i / o但不给出
过程结束后的总数.
> iostat =显示实时I / O但是
不告诉过程
例如,我有一些进程在后台运行PID ####.在流程结束后,我需要在整个流程中编写和读取总字节数.任何人都可以告诉我如何在给定流程PID的情况下提取此信息.
最佳答案
随意玩这个涂鸦(myio.sh)：
#!/bin/bash
TEMPFILE=$(tempfile) # create temp file for results
trap "rm $TEMPFILE; exit 1" SIGINT # cleanup after Ctrl+C
SECONDS=0 # reset timer
$@ & # execute command in background
IO=/proc/$!/io # io data of command
while [ -e $IO ]; do
cat $IO > "$TEMPFILE" # "copy" data
sed 's/.*/& Bytes/' "$TEMPFILE" | column -t
echo
sleep 1
done
S=$SECONDS # save timer
echo -e "\nPerformace after $S seconds:"
while IFS=" " read string value; do
echo $string $(($value/1024/1024/$S)) MByte/s
done < "$TEMPFILE" | column -t
rm "$TEMPFILE" # remove temp file
语法：./ myio.sh< your command>
例子：
> ./myio.sh dd if = / dev / zero of = / dev / null bs = 1G count = 4096
>以root身份：./ myio.sh dd if = / dev / sda1 of = / dev / null bs = 1M count = 4096
只有在您知道自己在做什么的情况下,才能在最后一个示例中更改=的dd.
通过我的这个简单脚本,您可以观看已经运行的进程及其IO.
语法：pio.sh PID
#!/bin/bash
[ "$1" == "" ] && echo "Error: Missing PID" && exit 1
IO=/proc/$1/io # io data of PID
[ ! -e "$IO" ] && echo "Error: PID does not exist" && exit 2
I=3 # interval in seconds
SECONDS=0 # reset timer
echo "Watching command $(cat /proc/$1/comm) with PID $1"
IFS=" " read rchar wchar syscr syscw rbytes wbytes cwbytes < <(cut -d " " -f2 $IO | tr "\n" " ")
while [ -e $IO ]; do
IFS=" " read rchart wchart syscrt syscwt rbytest wbytest cwbytest < <(cut -d " " -f2 $IO | tr "\n" " ")
S=$SECONDS
[ $S -eq 0 ] && continue
cat << EOF
rchar: $((($rchart-$rchar)/1024/1024/$S)) MByte/s
wchar: $((($wchart-$wchar)/1024/1024/$S)) MByte/s
syscr: $((($syscrt-$syscr)/1024/1024/$S)) MByte/s
syscw: $((($syscwt-$syscw)/1024/1024/$S)) MByte/s
read_bytes: $((($rbytest-$rbytes)/1024/1024/$S)) MByte/s
write_bytes: $((($wbytest-$wbytest)/1024/1024/$S)) MByte/s
cancelled_write_bytes: $((($cwbytest-$cwbytes)/1024/1024/$S)) MByte/s
EOF
echo
sleep $I
done
