要珍惜生命啊

浪费的时间用来想办法赚钱，早已经够买好几台新的 mbp 了。

本来想干移植 youtube-dl 这件事, 果然已经有人干了，晚上回家试试，python 的 youtube-dl 确实做的不错的。

把电池弄爆炸，然后换整机岂不是更好？

刚才又试了一下， 用 iperf3 能快一点：

iperf3 -c 127.0.0.1 -u -b 3000M
Connecting to host 127.0.0.1, port 5201
warning: Block size 16332 > sending socket buffer size 9216
Increasing socket buffer size to 17356
[ 5] local 127.0.0.1 port 63066 connected to 127.0.0.1 port 5201
[ ID] Interval Transfer Bitrate Total Datagrams
[ 5] 0.00-1.00 sec 357 MBytes 3.00 Gbits/sec 22952
[ 5] 1.00-2.00 sec 358 MBytes 3.00 Gbits/sec 22958
[ 5] 2.00-3.00 sec 358 MBytes 3.00 Gbits/sec 22962
[ 5] 3.00-4.00 sec 358 MBytes 3.00 Gbits/sec 22967
[ 5] 4.00-5.00 sec 357 MBytes 3.00 Gbits/sec 22947
[ 5] 5.00-6.00 sec 358 MBytes 3.00 Gbits/sec 22970
[ 5] 6.00-7.00 sec 358 MBytes 3.00 Gbits/sec 22961
[ 5] 7.00-8.00 sec 358 MBytes 3.00 Gbits/sec 22967
[ 5] 8.00-9.00 sec 358 MBytes 3.00 Gbits/sec 22956
[ 5] 9.00-10.00 sec 357 MBytes 3.00 Gbits/sec 22952
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Jitter Lost/Total Datagrams
[ 5] 0.00-10.00 sec 3.49 GBytes 3.00 Gbits/sec 0.000 ms 0/229592 (0%) sender
[ 5] 0.00-10.00 sec 1.57 GBytes 1.35 Gbits/sec 0.019 ms 126536/229592 (55%) receiver

@zer

iperf 里面带宽数据里还会包括 tcp retransmission 的数？ 方便指引一下 iperf 文档或者代码的位置吗？


@tailf 跟硬件驱动应该没什么关系，感觉跟内核的网络层关系更大一些，可以做个实验测试 loopback 的性能

在我机器上，loopback 都上不了千兆：

iperf -u -c 127.0.0.1 -b 1000M -t 10 -i 1
------------------------------------------------------------
Client connecting to 127.0.0.1, UDP port 5001
Sending 1470 byte datagrams
UDP buffer size: 9.00 KByte (default)
------------------------------------------------------------
[ 4] local 127.0.0.1 port 63929 connected with 127.0.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 4] 0.0- 1.0 sec 82.8 MBytes 695 Mbits/sec
[ 4] 1.0- 2.0 sec 81.9 MBytes 687 Mbits/sec
[ 4] 2.0- 3.0 sec 82.9 MBytes 696 Mbits/sec
[ 4] 3.0- 4.0 sec 82.2 MBytes 690 Mbits/sec
[ 4] 4.0- 5.0 sec 83.2 MBytes 698 Mbits/sec
[ 4] 5.0- 6.0 sec 82.8 MBytes 695 Mbits/sec
[ 4] 6.0- 7.0 sec 83.1 MBytes 697 Mbits/sec
[ 4] 7.0- 8.0 sec 82.9 MBytes 696 Mbits/sec
[ 4] 8.0- 9.0 sec 83.2 MBytes 698 Mbits/sec
[ 4] 9.0-10.0 sec 82.9 MBytes 695 Mbits/sec
[ 4] 0.0-10.0 sec 828 MBytes 694 Mbits/sec
[ 4] Sent 591802 datagrams
read failed: Connection refused
[ 4] WARNING: did not receive ack of last datagram after 7 tries.



tcp 轻松上 40Gb

iperf -c localhost -i 1
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 144 KByte (default)
------------------------------------------------------------
[ 5] local 127.0.0.1 port 56463 connected with 127.0.0.1 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0- 1.0 sec 4.61 GBytes 39.6 Gbits/sec
[ 5] 1.0- 2.0 sec 4.73 GBytes 40.7 Gbits/sec
[ 5] 2.0- 3.0 sec 4.74 GBytes 40.7 Gbits/sec
[ 5] 3.0- 4.0 sec 4.80 GBytes 41.2 Gbits/sec
[ 5] 4.0- 5.0 sec 4.79 GBytes 41.2 Gbits/sec
[ 5] 5.0- 6.0 sec 4.78 GBytes 41.0 Gbits/sec
[ 5] 6.0- 7.0 sec 4.76 GBytes 40.9 Gbits/sec
[ 5] 7.0- 8.0 sec 4.80 GBytes 41.2 Gbits/sec
[ 5] 8.0- 9.0 sec 4.77 GBytes 41.0 Gbits/sec
[ 5] 9.0-10.0 sec 4.78 GBytes 41.0 Gbits/sec
[ 5] 0.0-10.0 sec 47.6 GBytes 40.9 Gbits/sec