Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's
From: Neil Horman <nhorman@tuxdriver.com>
Date: 2013-11-01 16:08:36
Also in:
lkml
From: Neil Horman <nhorman@tuxdriver.com>
Date: 2013-11-01 16:08:36
Also in:
lkml
On Fri, Nov 01, 2013 at 03:42:46PM +0000, Ben Hutchings wrote:
On Thu, 2013-10-31 at 14:30 -0400, Neil Horman wrote: [...]quoted
It functions, but unfortunately the performance lost to the completely broken branch prediction that this inflicts makes it a non starter:[...] Conditional branches are no good but conditional moves might be worth a shot. Ben.
How would you suggest replacing the jumps in this case? I agree it would be faster here, but I'm not sure how I would implement an increment using a single conditional move. Neil
-- Ben Hutchings, Staff Engineer, Solarflare Not speaking for my employer; that's the marketing department's job. They asked us to note that Solarflare product names are trademarked. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html