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  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Sat, 31 May 2008 09:10:23 +0200
From:	Harald Dunkel <harald.dunkel@...nline.de>
To:	netdev@...r.kernel.org
Subject: increase priority of tcp ACK packages in the kernel?

Hi folks,

AFAICS there is a performance problem for tcp: High volume
outgoing traffic seriously affects throughput for incoming
traffic due to the tcp ACK packages waiting between the
giant packages in the outgoing fifo.

Do you think it would be possible to increase the priority of
outgoing tcp ACK packages in the kernel by default?

The performance improvement on busy lines can be pretty high,
as the before-after images on http://www.benzedrine.cx/ackpri.html
show for OpenBSD.

I have found some solutions for Linux using tc and iptables,
e.g.

     http://www.3e.me.uk/dm/
     http://shearer.org/Linux_Shaping_Template

But maybe there is a more general solution that I haven't seen
yet.


Regards

Harri

--
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

Powered by blists - more mailing lists