grep "recaller=" cxserver.log.2021062415 |grep "reason=510"|awk -F "[" '{print substr($9,2,index($9,"m")-2),substr($3,2,index($3,"m")-2),$0}' | awk '{ if ($1-$2>0) {count += 1;sum+= ($1-$2)}} END {print "count=" count; print "total=" NR; print "sum=" sum; print "average=" sum/count }'