随笔分类 -  071_网络分析/优化

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从流量控制算法谈网络优化 – 从 CUBIC 到 BBRv2 算法
摘要：https://aws.amazon.com/cn/blogs/china/talking-about-network-optimization-from-the-flow-control-algorithm/ by Lianghong Fei | on 16 MAR 2021 | in Netwo 阅读全文
posted @ 2022-01-27 10:34 张同光 阅读(1204) 评论(0) 推荐(0) 编辑
计算机网络基础 — Smart NIC — TSO、GSO、LRO、GRO 卸载技术
摘要：https://is-cloud.blog.csdn.net/article/details/118858113?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7EC 阅读全文
posted @ 2022-01-02 10:13 张同光 阅读(569) 评论(0) 推荐(0) 编辑
Classification of different congestion control algorithms. Dotted arrows indicate that one was based on the other.
摘要：Loss-based algorithms Tahoe Reno NewReno SCTP HS-TCP H-TCP Hybla BIC Cubic Westwood Westwood+ TCPW-A LogWestwood+Delay-based algorithms DUAL Vegas Veg 阅读全文
posted @ 2022-01-02 09:13 张同光 阅读(28) 评论(0) 推荐(0) 编辑
What is Delayed ACK and how can it be a bottleneck in your network.
摘要：https://www.linkedin.com/pulse/20141113153643-13386347-what-is-delayed-ack-and-how-can-it-be-a-bottleneck-in-your-network Gonzalo MurilloAzure Rapid R 阅读全文
posted @ 2022-01-01 23:03 张同光 阅读(71) 评论(0) 推荐(0) 编辑
Delayed ACK and Nagle's Algorithm
摘要：https://noisy.network/2017/02/06/delayed-ack-and-nagles-algorithm/ mavenetPosted on February 6, 2017Categories BigIP F5, NetworkTags Delayed ACK, Nagl 阅读全文
posted @ 2022-01-01 22:45 张同光 阅读(51) 评论(0) 推荐(0) 编辑
Can I monitor Linux socket buffer fullness? is it sufficiently "real-time"?
摘要：https://stackoverflow.com/questions/12048116/can-i-monitor-linux-socket-buffer-fullness I work in support for a tech company. I'm trying to troublesho 阅读全文
posted @ 2021-12-28 19:14 张同光 阅读(70) 评论(0) 推荐(0) 编辑
How to query tcp buffer sizes for a certain socket?
摘要：https://access.redhat.com/discussions/3624151 The -m switch of ss gives socket memory info.# ss -ntmpState Recv-Q Send-Q Local Address:Port Peer Addre 阅读全文
posted @ 2021-12-28 18:56 张同光 阅读(159) 评论(0) 推荐(0) 编辑
Linux kernel TCP smoothed-RTT estimation
摘要：https://strugglingcoder.info/index.php/linux-kernel-tcp-smoothed-rtt-estimation/ Posted: February 18th, 2018 | Author: hiren | Filed under: Linux, net 阅读全文
posted @ 2021-12-05 20:24 张同光 阅读(153) 评论(0) 推荐(0) 编辑
What is RTT (Round-Trip Time) and How to Reduce it?
摘要：https://www.stormit.cloud/post/what-is-round-trip-time-rtt-meaning-calculation In this article, you will learn:Round-trip time (RTT) meaning and what 阅读全文
posted @ 2021-12-05 19:09 张同光 阅读(311) 评论(0) 推荐(0) 编辑
How can TCP ACKs be used to measure latency to a server?
摘要：https://www.pico.net/kb/how-can-tcp-acks-be-used-to-measure-latency-to-a-server/ TCP ACKs can be used to measure the round-trip time to a TCP receiver 阅读全文
posted @ 2021-12-05 18:33 张同光 阅读(75) 评论(0) 推荐(0) 编辑
How to Fix Packet Loss: Causes, Simple Solutions & Top Tools
摘要：https://getvoip.com/blog/2020/02/13/how-to-fix-packet-loss/ Voice Over Internet Protocol (VoIP) is celebrated for its crystal-clear HD audio via succe 阅读全文
posted @ 2021-12-04 22:22 张同光 阅读(143) 评论(0) 推荐(0) 编辑
CONFIG_NET_SCH_NETEM: to emulate network delay, loss, and packet re-ordering.
摘要：CONFIG_NET_SCH_NETEM: Say Y if you want to emulate network delay, loss, and packet re-ordering. This is often useful to simulate networks when testing 阅读全文
posted @ 2021-03-05 09:24 张同光 阅读(343) 评论(0) 推荐(0) 编辑
Tuning initcwnd for optimum performance
摘要：https://www.cdnplanet.com/blog/tune-tcp-initcwnd-for-optimum-performance/#change-initcwnd Tuning the initial congestion window parameter (initcwnd) on 阅读全文
posted @ 2021-03-04 14:18 张同光 阅读(158) 评论(0) 推荐(0) 编辑
MPTCP协议---Android手机通过 WIFI 和 4G 两条路径同时传输视频数据 --- 抓包分析 --- tcpdump-mptcp-20210304004.txt
摘要：MPTCP协议 Android手机通过 WIFI 和 4G 两条路径同时传输视频数据 12:10:20.909483 IP (tos 0x48, ttl 64, id 58954, offset 0, flags [DF], proto TCP (6), length 120) 172.17.223 阅读全文
posted @ 2021-03-04 12:14 张同光 阅读(3284) 评论(0) 推荐(0) 编辑
the socket buffer size of linux
摘要：# Most versions of UNIX have a very low default buffer limit, which should be increased to at least 2MB. Also, note that UDP recommendations are only 阅读全文
posted @ 2021-03-04 11:36 张同光 阅读(590) 评论(0) 推荐(0) 编辑
编译 netcat for lineage-17.1-20210303-UNOFFICIAL-dipper.zip (ARM)
摘要：external/netcat/netcat.c /* OpenBSD:netcat.c,v1.1032011/10/0408:34:34fgschExp */ /* * Copyright (c) 2001 Eric Jackson <ericj@monkey.org> * * 阅读全文
posted @ 2021-03-03 19:44 张同光 阅读(96) 评论(0) 推荐(0) 编辑
Tcpprobe 在网络中的使用 --- tcp_probe has been removed from the kernel. --- Using ip-tcp_metrics --- Using ss (socket statistics)
摘要：https://elixir.bootlin.com/linux/v4.0/source/net/ipv4/tcp_probe.c https://askubuntu.com/questions/1164562/tcp-probe-could-not-insert-tcp-probe/1164634 阅读全文
posted @ 2021-02-13 21:55 张同光 阅读(804) 评论(1) 推荐(0) 编辑
全面的 iPerf3 Android平台移植编译、运行过程记录
摘要：https://blog.csdn.net/China_Style/article/details/109660170 1. iPerf 简介 iPerf 是什么？无需我多言，官网这条醒目的宣传语，已表达的很简洁、准确，甚至透露着一丝霸气： iPerf——支持TCP、UDP和SCTP的终极测速工具！ 阅读全文
posted @ 2021-02-13 21:22 张同光 阅读(1977) 评论(0) 推荐(0) 编辑
解决 tcpdump 抓包时的丢包问题 - mptcp
摘要：# begin # 因为 M8 接收的数据 (1238×1428÷1024 = 1726 KB) < 3.6M, 因此，再做一次实验，仅对 M1 & M8 抓包 # transmission time: 95 seconds cd /root/tcpdump-on-8-nodes/MPTCP-Mar 阅读全文
posted @ 2018-01-28 18:05 张同光 阅读(1209) 评论(0) 推荐(0) 编辑
(OK) Android 7 中使用 iperf3, 错误解决：error - unable to create a new stream no such file or directory
摘要：修改文件 src/iperf_api.c，否则，执行 iperf3 时，出错：iperf3: error - unable to create a new stream no such file or directory # cd /mnt/vm_ztg_t/paper-8-test-nougat/ 阅读全文
posted @ 2018-01-01 10:40 张同光 阅读(2264) 评论(0) 推荐(0) 编辑

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