Date: Sun, 18 Dec 2011 17:29:33 -0700 From: Warner Losh <imp@bsdimp.com> To: Stefan Bethke <stb@lassitu.de> Cc: Oleksandr Tymoshenko <gonzo@FreeBSD.org>, Adrian Chadd <adrian@FreeBSD.org>, "freebsd-embedded@freebsd.org" <freebsd-embedded@FreeBSD.org> Subject: Re: Updated switch/glue patch? Message-ID: <C0BF20FD-E30F-4E9C-A0FE-500BE4807B99@bsdimp.com> In-Reply-To: <18CABB46-9B9A-41CB-8742-6723C5FF4D67@lassitu.de> References: <CAJ-Vmon8%2BOXQ4g752zZEB-O0BR0sFWO0QUvw--xp2jsBDkx6tQ@mail.gmail.com> <0F6CC18F-6973-42A2-AC03-F01BF59458AE@lassitu.de> <CAJ-Vmo=Y8pp4iFnw%2B1hcPae6QXFboz=a7puwgC1kVSZ3JwMgPQ@mail.gmail.com> <1100F70E-9DA9-4163-AC9A-423ECE5AA9A3@lassitu.de> <CAJ-VmonrnJ7cC6u2LsL9AGusz_%2BkSwY62Rr1__sg5U_NynJ1SQ@mail.gmail.com> <CAJ-Vmo=WSN1oLM=B2HqSHrWyOaOD9BSwwu8=1Wys0CLRJ_N-TA@mail.gmail.com> <C637C171-A1A2-4296-84FA-6DE97137DC42@lassitu.de> <CAJ-Vmon2boy7OCh_4O0MeCi0yCdZu0OYb5dxHCEK=-%2B46zBGtg@mail.gmail.com> <CAJ-Vmoku5eLEYi5_DXVxK=0=4Ewn2aGepv3YUw4ApuVh_7y2%2Bw@mail.gmail.com> <CAJ-VmonvpnaS1rAO%2BsDRh1E5WfsrZTYE297Kc96prhfKjrM89Q@mail.gmail.com> <CAJ-VmokQxQs2DUKL=ONyxnnS7Q28ytmwZJ_thqvc4SvMkmS=cQ@mail.gmail.com> <18CABB46-9B9A-41CB-8742-6723C5FF4D67@lassitu.de>
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On Dec 18, 2011, at 3:17 AM, Stefan Bethke wrote: > I've reimplemented iicbb.c to be slightly more protocol compliant, and = to be able to tune transfer speeds to the actual hardware capabilities. = I've timed a single GETSCL (with WITNESS) to 8.7 microseconds, clearly = that won't do. What is it without WITNESS? The performance numbers with WITNESS are = generally uninteresting for a deployed system. Warner
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