Can I use VFP in work queue context ?
r-woodruff2 at ti.com
Thu Apr 22 15:33:37 EDT 2010
> From: Nicolas Pitre [mailto:nico at fluxnic.net]
> Sent: Thursday, April 22, 2010 12:20 PM
> > If the work queue executes in a unique context it could follow the
> > same lazy strategy a user space one does.
> It could... but that begs the question: what is this that requires so
> much processing power within the kernel? This really needs to be fully
> understood and justified before even considering a possible VFP usage in
> the kernel.
A simple candidate is Neon memory copy. It can perform much better than the ARM based one. There are a few unfortunate copies associated with some networking devices which see decent benefit.
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