linux-kernel - Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

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Message-ID: <87siw4xy9i.fsf@tassilo.jf.intel.com>
Date:	Sun, 13 Oct 2013 21:38:33 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Neil Horman <nhorman@...driver.com>
Cc:	linux-kernel@...r.kernel.org, sebastien.dugue@...l.net,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Subject: Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

Neil Horman <nhorman@...driver.com> writes:

> Sébastien Dugué reported to me that devices implementing ipoib (which don't have
> checksum offload hardware were spending a significant amount of time computing

Must be an odd workload, most TCP/UDP workloads do copy-checksum
anyways. I would rather investigate why that doesn't work.

That said the change looks reasonable, but may not fix the root cause.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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