Date: Fri, 19 Apr 2013 08:52:46 -0700 From: Sean Bruno <sean_bruno@yahoo.com> To: Bruce Evans <brde@optusnet.com.au> Cc: "pyunyh@gmail.com" <pyunyh@gmail.com>, "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, bde <bde@freebsd.org> Subject: Re: bge(4) sysctl tuneables -- a blast from the past. more knobs! MORE! Message-ID: <1366386766.1387.0.camel@localhost> In-Reply-To: <20130416152121.G904@besplex.bde.org> References: <1365781568.1418.1.camel@localhost> <20130413200512.G1165@besplex.bde.org> <1366065356.1350.7.camel@localhost> <20130416152121.G904@besplex.bde.org>
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--=-zayncrzHB4mi1f2QEXBL Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Version 0.2 of patches to bge(4). I'm not totally happy with it, but comments welcome. I need better explanations of usage for the man page. I've dropped bge_rxd completely here as it was suggested to not even bother adjusting it. http://people.freebsd.org/~sbruno/bge_config_update_1.txt > I didn't notice before that these are tunables and not sysctls. That's > much more broken. Actually tuning using them like I do with sysctls > would take ~10000 reboots. Tunables are bogus for anything that isn't > needed for booting. Optimizations are needed for booting. >=20 Done and changed. Things seem to do the right thing when adjusted. > Technical bugs include: > - wrong defaults are claimed for *coal_ticks. The defaults are 150, but > are claimed to be 150 milliseconds. These values are dimensionless, > but since ticks take 1 microsecond each, 150 gives 150 microseconds, > not 150 milliseconds. man page updated to reflect usec timing. checked the tech docs as well and confirmed microseconds. > - *coal_bds is claimed to be a count of packes (sic). Actually, it is a > count of buffer descriptors. Small packets take 1 bd, but normal > packets take 2, and jumbo packets many (?). The best tuning may be > depend on the average bds/packet. man page updated with wording that attempts to say this. > - the new tunables are in the wrong namespace (hw instead of dev) fixed > - the new tunables are too global (bge instead of bge.N) fixed >=20 > There are only 2 bge tunables now, and they only have half of these bugs: > - hw.bge.allow_asf is in the wrong namespace > - hw.bge.allow_asf is too global Maintainer disagrees with this. > - dev.bge.%d.msi seems to be correct. > Both of the old tunables are needed for boot-time configuration. >=20 > Bruce Sean --=-zayncrzHB4mi1f2QEXBL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iQEcBAABAgAGBQJRcWhJAAoJEBkJRdwI6BaHFDwH/1GyDPS42EREiT23E5oOu5Bv R03H29KIl6fEz4BmWjYxQ0SYPKp50fAHCeu3P9OrlwPGv0DwsViYh2g9D7T19Gx4 GGRUUEfyEQj0mw6GCjaV5vVfMUZyMo64zpReDjgyaWyQXmratXp3IfcRVnqLq87v iRerFfnNWujqg0TCxenRT0+6/4TwxLJ8FLhhVqAoYx36LT7aWpoTwxBglzQ0hkgx 4wiwtvtvyBYnxOTifig2VfAWeDELTrL37Zq4sZGLpysvlJxvsGZJOQwJCUlXQa4O 9byTTgIBelM8t7c4Yo+H5UuWfxdf4+4Bu24DmYAZmahBT6MWzy6YzJ5wkcjMhL0= =0ge+ -----END PGP SIGNATURE----- --=-zayncrzHB4mi1f2QEXBL--
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