shell 脚本并发控制

直接上脚本和运行结果

#!/bin/bash
function a_sub {
        sleep 2
}

tmp_fifofile="/tmp/$$.fifo"
mkfifo $tmp_fifofile
exec 6<>$tmp_fifofile
rm $tmp_fifofile

thread=15
for ((i=0;i<$thread;i++));do
        echo
done >&6

for ((i=0;i<50;i++));do
        read -u6
        {
                a_sub && {
                        echo "a_sub is finished"
                } || {
                        echo "sub error"
                }
                echo >&6
        }&
done
wait
exec 6>&-
exit 0

time bash xxx.bash
...
...
...


real    0m8.010s
user    0m0.014s
sys     0m0.054s