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我很困惑看到netcat和iperf結果之間的巨大差異。我有10 G鏈接連接我的服務器和客戶端。我爲iperf獲得10Gb/s左右的費用,但netcat僅達到約280 MB/s。什麼可能是錯誤?10G鏈接的netcat和iperf結果的巨大差異
對於的Iperf
服務器
iperf -s
客戶
iperf -c 172.79.56.27 -i1 -t 10
結果:
Client connecting to 172.79.56.27, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 172.79.56.28 port 46058 connected with 172.79.56.27 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0- 1.0 sec 1.07 GBytes 9.23 Gbits/sec
[ 3] 1.0- 2.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 2.0- 3.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 3.0- 4.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 4.0- 5.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 5.0- 6.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 6.0- 7.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 7.0- 8.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 8.0- 9.0 sec 1.09 GBytes 9.36 Gbits/sec
[ 3] 9.0-10.0 sec 1.09 GBytes 9.35 Gbits/sec
[ 3] 0.0-10.0 sec 10.9 GBytes 9.34 Gbits/sec
對於netcat的,
服務器
nc -v -v -l -n 2222 >/dev/null
客戶
time dd if=/dev/zero | nc -v -v -n 172.79.56.27 2222
Connection to 172.79.56.27 2222 port [tcp/*] succeeded!
^C6454690+0 records in
6454690+0 records out
3304801280 bytes (3.3 GB) copied, 11.4463 s, 289 MB/s
real 0m11.449s
user 0m6.868s
sys 0m15.372s