Date: Wed, 2 May 2007 14:10:51 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: freebsd-acpi@freebsd.org Cc: Hans Petter Selasky <hselasky@c2i.net> Subject: Reasons to try the new USB driver (was: cpu.cx usage no longer available?) Message-ID: <20070502141051.063d07a4@localhost> In-Reply-To: <20070501224545.84C6945042@ptavv.es.net> References: <20070501223315.GA95099@heff.fud.org.nz> <20070501224545.84C6945042@ptavv.es.net>
next in thread | previous in thread | raw e-mail | index | archive | help
--Sig_eIbiHVDSkLH+Io_jYXKDVc1 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable "Kevin Oberman" <oberman@es.net> wrote: > > Date: Wed, 2 May 2007 10:33:15 +1200 > > From: Andrew Thompson <thompsa@freebsd.org> > >=20 > > On Tue, May 01, 2007 at 03:13:38PM -0700, Kevin Oberman wrote: > > > I just installed Hans Petter's new USB driver on my laptop and wanted= to > > > see if it still prevented the system from dropping into deeper sleep > > > modes. In the past I was limited to C2 when USB was loaded. > > >=20 > > > Now I see only hw.acpi.cpu.cx_lowest. cx_usage and cx_supported seem = to > > > be gone. > > >=20 > > > I am running on a Pentium-M CPU, single core. > > >=20 > > > Do I need to enable something to make these show up or is there anoth= er > > > way to get this information? > >=20 > > Its now a per-cpu setting, look at dev.cpu.0.cx_supported. >=20 > Ahh, yes. I knew this at one time, but I had forgotten it. >=20 > Looks like the man page is a bit out of date. If I get a few spare > minutes I'll try to submit a patch. >=20 > I am VERY pleased to see that Hans Petter's new USB drivers do allow the > system to drop into C3! It will require a bit more testing, but I hope > to be able to leave USB in my kernel without serious battery life > impact. >=20 > I have heard that the new USB drivers are unlikely to make it into V7.0 > due to lack of testing. I really hope a few more people give it a whirl > and report back on the results, good or bad, so that the drivers can > either be fixed or added to current. I assume more people would test it if they knew what the new USB driver does better than the old one. I knew that a new USB driver existed, and that it had some locking improvements, but so far I didn't see any benchmarks. (I'm not subscribed to freebsd-usb@, maybe they were only posted there.) The last status report said: |Some claim 2x improvements, others have seen more. |But don't expect too much. I (mis)interpreted that as "some claim a lot but don't expect anything".=20 Now that I know that the new USB driver might increase battery life I'm definitively going to give it try, so maybe it would make sense to (re-)post some more reasons or success stories on stable@ or current@. Fabian --Sig_eIbiHVDSkLH+Io_jYXKDVc1 Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGOH/LBYqIVf93VJ0RAk70AJ94txsjRKWHIVT+SsDNyydRqm5iqACeOhxQ 3Ceh7xnwmg5QnILSLsAD77U= =hPGg -----END PGP SIGNATURE----- --Sig_eIbiHVDSkLH+Io_jYXKDVc1--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070502141051.063d07a4>