From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tristan <9p-st@imu.li> To: 9fans@9fans.net Content-Type: text/plain; charset=UTF-8 Message-Id: <2579b9.87e726c6.np4k.mx@tumtum.plumbweb.net> In-Reply-To: <2579b9.4d6b93e5.B75p.mx@tumtum.plumbweb.net> References: <2579b6.8126cb52.62GS.mx@tumtum.plumbweb.net><504d1e9e6a08271d15827ea4c00507ff@chula.quanstro.net><2579b9.032a3487.pkFh.mx@tumtum.plumbweb.net><2579b9.228186c7.D0Vx.mx@tumtum.plumbweb.net> <48dfd79dc45c0d5e9d88c6a79de7202e@brasstown.quanstro.net> <2579b9.4d6b93e5.B75p.mx@tumtum.plumbweb.net> Date: Wed, 7 Mar 2012 00:50:37 -0500 User-Agent: mx-alpha Content-Transfer-Encoding: quoted-printable Subject: Re: [9fans] usb slowness Topicbox-Message-UUID: 67697b60-ead7-11e9-9d60-3106f5b1d025 a little reading later. the usb mass storage bulk only spec stipulates that only one request may be active at a time. wince. so, bigger buffer? yup, 32k reads double the speed again. 64k reads aren't quite right, something clips it's tail. now i'm up to ~11 MB/s. except that it crashes the pc and olpc kernels. kw does fine though (for now!). changing devmnt seem unlikely to be very safe without checking on every fileserver in case it now happily assumes 8k (plus headers) is enough for anything. anybody messed with devmnt's Msgsize successfully? enjoy, tristan --=20 All original matter is hereby placed immediately under the public domain.