netdev - Re: [RFC] New driver API to speed up small packets xmits

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

Message-ID: <4643926D.5020108@hp.com>
Date:	Thu, 10 May 2007 14:45:17 -0700
From:	Rick Jones <rick.jones2@...com>
To:	David Stevens <dlstevens@...ibm.com>
Cc:	Evgeniy Polyakov <johnpol@....mipt.ru>,
	Krishna Kumar2 <krkumar2@...ibm.com>, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org
Subject: Re: [RFC] New driver API to speed up small packets xmits

David Stevens wrote:
> The word "small" is coming up a lot in this discussion, and
> I think packet size really has nothing to do with it. Multiple
> streams generating packets of any size would benefit; the
> key ingredient is a queue length greater than 1.
> 
> I think the intent is to remove queue lock cycles by taking
> the whole list (at least up to the count of free ring buffers)
> when the queue is greater than one packet, thus effectively
> removing the lock expense for n-1 packets.

Which worked _very_ well (the whole list) going in the other direction for the 
netisr queue(s) in HP-UX 10.20.  OK, I promise no more old HP-UX stories for the 
balance of the week :)

Taking some count of the list might be a triffle too complicated.

rick jones
-
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