网络性能
将其中的整理下: https://l8liliang.github.io/2021/08/19/linux-network-performance.html#performance-tuning
https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt
https://github.com/leandromoreira/linux-network-performance-parameters
- https://blog.packagecloud.io/illustrated-guide-monitoring-tuning-linux-networking-stack-receiving-data/
- https://blog.cloudflare.com/how-to-achieve-low-latency/
- 这个作者很厉害，还存在大量的 blog : https://blog.cloudflare.com/author/marek-majkowski/
-
NAPI will poll data from the receive ring buffer until
netdev_budget_usecstimeout ornetdev_budgetanddev_weightpackets - Linux will pass the skb to the kernel stack (
netif_receive_skb)- 如此精确的描述
- soft IRQ (
NET_TX_SOFTIRQ) aftertx-usecstimeout ortx-frames- 我感觉这个，有趣的哇
xps
介绍各种高级技术:
https://docs.kernel.org/networking/scaling.html
如何实现降低 latency
- https://blog.cloudflare.com/how-to-achieve-low-latency/
- https://news.ycombinator.com/item?id=9805412
onload : 有趣的 https://docs.xilinx.com/r/en-US/ug1586-onload-user/Onload-and-NIC-Partitioning
-
https://docs.xilinx.com/r/en-US/ug1586-onload-user/Pre-Test-Configuration?tocId=jsfcwmJFWkO18lAcyNAZHQ
-
https://github.com/penberg/awesome-low-latency
onload 基本知识
iperf3 的各种测试
标准模式，vhost-net ，虚拟机无额外配置，host 中 iperf3 -s
[ ] 虚拟机走自己的 ovs bridege 之后
13900k 中的测试:
似乎是，不太记得了，到时候复现下。
🧀 iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 10.0.0.2, port 34976
[ 5] local 10.0.0.2 port 5201 connected to 10.0.0.2 port 34988
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 338 MBytes 2.83 Gbits/sec
[ 5] 1.00-2.00 sec 350 MBytes 2.93 Gbits/sec
[ 5] 2.00-3.00 sec 350 MBytes 2.93 Gbits/sec
[ 5] 3.00-4.00 sec 351 MBytes 2.95 Gbits/sec
[ 5] 4.00-5.00 sec 344 MBytes 2.89 Gbits/sec
[ 5] 5.00-6.00 sec 352 MBytes 2.96 Gbits/sec
[ 5] 6.00-7.00 sec 352 MBytes 2.95 Gbits/sec
[ 5] 7.00-8.00 sec 347 MBytes 2.91 Gbits/sec
[ 5] 8.00-9.00 sec 351 MBytes 2.94 Gbits/sec
[ 5] 9.00-10.00 sec 345 MBytes 2.90 Gbits/sec
[ 5] 10.00-10.00 sec 512 KBytes 2.90 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 3.40 GBytes 2.92 Gbits/sec receiver
正常的:
Server listening on 5201 (test #4)
-----------------------------------------------------------
Accepted connection from 10.0.88.0, port 49020
[ 5] local 10.0.0.2 port 5201 connected to 10.0.88.0 port 49032
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 11.7 GBytes 101 Gbits/sec
[ 5] 1.00-2.00 sec 12.0 GBytes 103 Gbits/sec
[ 5] 2.00-3.00 sec 12.1 GBytes 104 Gbits/sec
[ 5] 3.00-4.00 sec 12.1 GBytes 104 Gbits/sec
[ 5] 3.00-4.00 sec 12.1 GBytes 104 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-4.00 sec 55.4 GBytes 119 Gbits/sec receiver
iperf3: the client has terminated
-----------------------------------------------------------
Server listening on 5201 (test #5)
-----------------------------------------------------------
asahi m2 中自己 ping 自己
🧀 iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 10.0.0.1, port 48556
[ 5] local 10.0.0.1 port 5201 connected to 10.0.0.1 port 48568
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 17.2 GBytes 147 Gbits/sec
[ 5] 1.00-2.00 sec 16.6 GBytes 142 Gbits/sec
[ 5] 2.00-3.00 sec 17.0 GBytes 146 Gbits/sec
[ 5] 3.00-4.00 sec 17.4 GBytes 150 Gbits/sec
[ 5] 3.00-4.00 sec 17.4 GBytes 150 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-4.00 sec 69.9 GBytes 150 Gbits/sec receiver
iperf3: the client has terminated
-----------------------------------------------------------
Server listening on 5201 (test #2)
-----------------------------------------------------------
asahi m2 中 guest iperf3 to host
居然过了 vhost ，性能反而会更好
➜ ~ iperf3 -c 10.0.0.1 -t 0
Connecting to host 10.0.0.1, port 5201
[ 5] local 10.0.73.0 port 58330 connected to 10.0.0.1 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 19.3 GBytes 166 Gbits/sec 2 1.92 MBytes
[ 5] 1.00-2.00 sec 21.5 GBytes 185 Gbits/sec 0 1.94 MBytes
[ 5] 2.00-3.00 sec 21.6 GBytes 185 Gbits/sec 0 1.96 MBytes
[ 5] 3.00-4.00 sec 21.7 GBytes 186 Gbits/sec 0 1.99 MBytes
[ 5] 4.00-5.00 sec 21.6 GBytes 186 Gbits/sec 0 2.07 MBytes
[ 5] 5.00-6.00 sec 21.7 GBytes 186 Gbits/sec 0 2.12 MBytes
[ 5] 6.00-7.00 sec 21.7 GBytes 186 Gbits/sec 0 2.12 MBytes
[ 5] 7.00-8.00 sec 21.7 GBytes 186 Gbits/sec 0 2.12 MBytes
[ 5] 8.00-9.00 sec 21.6 GBytes 186 Gbits/sec 0 2.25 MBytes
^C[ 5] 9.00-9.32 sec 5.45 GBytes 146 Gbits/sec 0 2.25 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-9.32 sec 198 GBytes 182 Gbits/sec 2 sender
[ 5] 0.00-9.32 sec 0.00 Bytes 0.00 bits/sec receiver
13900k 的 perf 工具
🧀 iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 10.0.0.2, port 36052
[ 5] local 10.0.0.2 port 5201 connected to 10.0.0.2 port 36056
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 14.7 GBytes 126 Gbits/sec
[ 5] 1.00-2.00 sec 14.1 GBytes 121 Gbits/sec
[ 5] 2.00-3.00 sec 14.5 GBytes 124 Gbits/sec
[ 5] 3.00-4.00 sec 14.6 GBytes 126 Gbits/sec
[ 5] 4.00-5.00 sec 14.6 GBytes 125 Gbits/sec
[ 5] 4.00-5.00 sec 14.6 GBytes 125 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-5.00 sec 80.8 GBytes 139 Gbits/sec receiver
想不到和 m2 的性能差别这么大。
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