Params :

Voir :

• https://unix.stackexchange.com/questions/210367/changing-the-tcp-rto-value-in-linux
• https://www.extrahop.com/company/blog/2016/retransmission-timeouts-rtos-application-performance-degradation/
• https://blog.codefarm.me/2023/01/17/tcp-ip-tcp-timeout-and-retransmission/
• https://community.nxp.com/pwmxy87654/attachments/pwmxy87654/MQX-Software-Solutions%40tkb/145/1/TCP%20Retransmission%20Time%20Out.pdf
• https://www.pdl.cmu.edu/PDL-FTP/Storage/sigcomm147-vasudevan.pdf
• https://access.redhat.com/solutions/726753
• https://access.redhat.com/solutions/7041487
• https://stackoverflow.com/questions/5227520/how-many-times-will-tcp-retransmit
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/monitoring_and_managing_system_status_and_performance/tuning-the-network-performance_monitoring-and-managing-system-status-and-performance
• http://sgros.blogspot.com/2012/02/calculating-tcp-rto.html
• https://www.catchpoint.com/blog/tcp-rtt
• https://people.eecs.berkeley.edu/~randy/Courses/CS294.S13/8.1.pdf
• https://arthurchiao.art/blog/customize-tcp-initial-rto-with-bpf/
• https://developers.redhat.com/articles/2024/02/27/network-observability-using-tcp-handshake-round-trip-time

Round-Trip Time (RTT) also called round-trip delay. RTT is the time required for a signal pulse to travel from a specific source to a specific destination and back again. In this context it is the time it takes for an outgoing TCP client packet to be acknowledged by the server.

Le temps d'aller-retour (RTT) est le temps qu'il faut aux données pour aller et revenir d'un certain point sur un réseau.

RTO pour les connexions sur le port 8080 Client

# Sur le client
ss -i -n  | egrep -A1 '[0-9]:8080\s+$' |egrep -o 'rto:\w+'
 
# Sur le serveur
ss -i -n  | egrep -A1 '[0-9]:8080\s+[^$]' |egrep -o 'rto:\w+'