netdev - 10GBE performance drop with net.ipv4.tcp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4FE0EA33.1000309@profihost.ag>
Date:	Tue, 19 Jun 2012 23:08:03 +0200
From:	Stefan Priebe <s.priebe@...fihost.ag>
To:	Linux Netdev List <netdev@...r.kernel.org>
Subject: 10GBE performance drop with net.ipv4.tcp_timestamps=0

Hello List,

i'm testing 10GBE speed with tweo servers. One with 3.5-rc3 nd thoe 
other one whith RHEL 6 (2.6.32 kernel).

I noticed that setting
net.ipv4.tcp_timestamps=0

descreased the performance from 9,7 Full Duplex to 3-4Gb/s.

Is this bahviour fine? What should / could i tet?

Greets
Stefan
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html