Date: Tue, 15 Dec 2009 14:40:01 -0800 From: Maksim Yevmenkin <maksim.yevmenkin@gmail.com> To: Iain Hibbert <plunky@rya-online.net> Cc: freebsd-bluetooth@freebsd.org Subject: Re: obex transfer speeds Message-ID: <bb4a86c70912151440m76313f3el2b44a90ff446b5c8@mail.gmail.com> In-Reply-To: <1260905798.329544.2767.nullmailer@galant.ukfsn.org> References: <20091201125054.44a00147@zelz27> <1259694948.961003.27487.nullmailer@galant.ukfsn.org> <1259695873.086896.28523.nullmailer@galant.ukfsn.org> <bb4a86c70912011525n56cf9187wfecd230daa3c9d1e@mail.gmail.com> <1260285672.503038.542.nullmailer@galant.ukfsn.org> <1260905798.329544.2767.nullmailer@galant.ukfsn.org>
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On Tue, Dec 15, 2009 at 11:36 AM, Iain Hibbert <plunky@rya-online.net> wrote: > Hi, > > While obexapp is the subject, I wonder what kind of transfer speeds people > get? Normally I use obexapp to copy files to and from my phone but they > are not much big files and I've never bothered with speed tests.. I have > been working some long hours at a tedious job lately and thought I would > listen to some music off my phone. > > However, transferring tracks is tedious. I have calculated (see attached > program) that I'm getting about 12-15 kbytes/second by using windows > mobile bluetooth explorer in suck mode (navigate to my laptop, then copy > and paste the directory to the sd card) > > using obexapp to push files seemed to go faster, about 15-20 kbytes/second > initially but obexapp doesn't handle sending complete directories so I had > to write a wrapper script and then when I left this going overnight it > only transferred about 15 tracks (I think a resource leak in the phone, > which needed a reboot afterwards) > > So, my question is what kind of speeds should we normally expect with > OBEX? I thought bluetooth should be faster than that but I don't really > know what version my phone has (laptop has Broadcom BCM2045B 2.0+EDR and > specs I found on the web says HTC Elf has 2.0 but I don't know about EDR) > and I only have a single computer so while a speed test would be possible > with two dongles, there could be interference in the stack. Has anybody > done anything like that in the past? > > I read some comments previously on the list and have raised the MTU to > 8192 bytes as suggested for an older obexapp but that hasn't improved the > speed much. Any other ideas? have you tried obexapp client to obexapp server transfer? i.e. pc to pc. i suspect that mobile devices just not being able to process data fast enough. thanks, max
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