Pin 1 GND Ground
Pin 2 L0p Lane 0 positive
Pin 3 L0n Lane 0 negative
Pin 4 ID0 Identification/control 0
Pin 5 PWR Power (charger or battery)
Pin 6 L1n Lane 1 negative
Pin 7 L1p Lane 1 positive
Pin 8 ID1 Identification/control 1

目测少了 3 or 6 是 USB2.0 和 3.0 的区别

客户端 request 并发 limit ，怼回去

6 代 CPU ？

iperf3 at 40Gbps and above
Achieving line rate on a 40G or 100G test host often requires parallel streams. However, using iperf3, it isn't as simple as just adding a -P flag because each iperf3 process is single-threaded, including all streams used by that iperf process for a parallel test. This means all the parallel streams for one test use the same CPU core. If you are core limited (this is often the case for a 40G host and it's usually the case for a 100G host), adding parallel streams won't help you unless you do so by adding additional iperf3 processes which can use additional cores.

Note that it is not possible to do this using pscheduler to manage iperf3 tests, so this is typically better suited to lab or testbed environments.

To run multiple iperf3 processes for a testing a high-speed host, do the following:

Start multiple servers:

iperf3 -s -p 5101&; iperf3 -s -p 5102&; iperf3 -s -p 5103 &
and then run multiple clients, using the "-T" flag to label the output:

iperf3 -c hostname -T s1 -p 5101 &;
iperf3 -c hostname -T s2 -p 5102 &;
iperf3 -c hostname -T s3 -p 5103 &;
Also, there are a number of additional host tuning settings needed for 40/100G hosts. The TCP autotuning settings may not be large enough for 40G, and you may want to try using the iperf3 -w option to set the window even larger (e.g.: -w 128M). Be sure to check your IRQ settings as well.



https://fasterdata.es.net/performance-testing/network-troubleshooting-tools/iperf/multi-stream-iperf3/

极米 h2 在手，不适合游戏，延迟较大

key 只激活一个人，赋予 office365 家庭的授权许可。

家庭版的分发流程其实是建立账号之间的家庭关系，核心操作是将其他成员通行证 [加入]

随后成员就能看到自己的订阅并安装。

有点像掉盘了，正常一瞬后，主控不再报告块设备的描述信息了，导致卷没有继续加载，只留下光秃秃一个主控在哪。

没有详细的日志信息露出表明，但也可以猜测是检测卷不干净，有进入 fsck 修复阶段后锁定了卷，这种情况可能要等几分钟。

你在用 C 转 A 的转接器吗？

关于本机-系统报告-硬件-USB

插入优盘前后 [cmd+R] 刷新界面，有变化么？

有的话，咱们来看看这里显示的 vendor id 等一系列信息，贴出来看看

把问题导向玄学了，我们回过头来看。 你认知的没识别的表现是啥

可以设置不自动连接的

chrome 有 apple silicon 支持的版本，我不知不觉就自动更新到通用版了，937MB 惊人

@tiny1994095
那就 插入优盘后，倒数 20 行
sudo dmesg

看看这个盘插入后返回些什么
diskutil list

降级到 iPadOS15·3 主流版本恢复了，已经充入超过 15%

ios15.4beta 发现 ipad pro 会莫名自动停止充电，多个 pd 充电器和线均如此。我先试试重启

ew3280u 也遇到过，判断是 HDR 引起问题

试过防火墙关闭吗

找个有源的、支持遥控器、新信号接入自动切换的
hdmi2.0 切换器，应该在 100 左右或更少

无源切换器的话，思考下可能供电差异（不足）