環境: Windows 10 Pro Version 1909 (OS Build 18363.535)
C:\>netsh interface tcp show global
Querying active state...
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Receive Window Auto-Tuning Level : normal
Add-On Congestion Control Provider : default
ECN Capability : disabled
RFC 1323 Timestamps : disabled
Initial RTO : 1000
Receive Segment Coalescing State : enabled
Non Sack Rtt Resiliency : disabled
Max SYN Retransmissions : 4
Fast Open : enabled
Fast Open Fallback : enabled
HyStart : enabled
Pacing Profile : off
[1], [2], [3] によると、以前のWindowsでは3秒だったようだ。
Linux のTCP再送タイムアウト時間 (RTO) については [3], [4] が参考となる。
[参考]
[1]
TCP Receive Window Auto-Tuning Level feature in Windows
https://support.microsoft.com/en-us/help/4494445/tcp-receive-auto-tuning-level-feature-in-windows
[2]
How to modify the TCP/IP maximum retransmission time-out
https://support.microsoft.com/en-us/help/170359/how-to-modify-the-tcp-ip-maximum-retransmission-time-out
[3]
TCPの再送時間について | nonbiriEnginnerBLOG
https://blog.hashihei.com/2019/02/02/tcp%E3%81%AE%E5%86%8D%E9%80%81%E6%99%82%E9%96%93%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6/
[4]
TCP再送タイムアウト時間の規格と実装 - co1row’s diary
http://co1row.hatenablog.com/entry/2017/09/26/012335