From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Brownell Date: Tue, 22 Jan 2008 05:26:32 +0000 Subject: Re: [spi-devel-general] [PATCH] spi: add support for SPI over SuperH SCI pins Message-Id: <200801212126.32727.david-b@pacbell.net> List-Id: References: <20080121104913.11908.50319.sendpatchset@clockwork.opensource.se> <20080122031114.GA2062@linux-sh.org> <200801212022.23139.david-b@pacbell.net> In-Reply-To: <200801212022.23139.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Cc: Paul Mundt , Magnus Damm , linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org On Monday 21 January 2008, David Brownell wrote: > then it's not bad. =A0And it's twice as fast as going through > a subroutine call for each bitop. =A0That's easily visible on Minor clarification: twice as fast for loads involving lots of medium-size buffers (1K+). Down from one minute(!) to put new kernels to the only place that they can boot from ... it's the usual case where a 5x speedup at one place is very visible, but doesn't add up to 5x overall; other issues start to show up more (like unchanged per-byte overheads). - Dave