Date: Wed, 16 Dec 2009 12:04:52 -0500 From: "Alexandre \"Sunny\" Kovalenko" <gaijin.k@gmail.com> To: Maksim Yevmenkin <maksim.yevmenkin@gmail.com> Cc: freebsd-bluetooth@freebsd.org Subject: Re: obex transfer speeds Message-ID: <1260983092.17657.10.camel@RabbitsDen> In-Reply-To: <bb4a86c70912151440m76313f3el2b44a90ff446b5c8@mail.gmail.com> 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> <bb4a86c70912151440m76313f3el2b44a90ff446b5c8@mail.gmail.com>
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On Tue, 2009-12-15 at 14:40 -0800, Maksim Yevmenkin wrote: > 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 > _______________________________________________ > freebsd-bluetooth@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-bluetooth > To unsubscribe, send any mail to "freebsd-bluetooth-unsubscribe@freebsd.org" Not very scientific (I took 43 MByte file and transferred it once and did not discount time spent on manually accepting transfer on the receiving end)... Source of the transfer is ThinkPad X60: FreeBSD 8.0-STABLE #0 r200413 ubt0: <Broadcom Corp BCM2045B, class 224/1, rev 2.00/1.00, addr 2> on usbus3 obexapp-1.4.12 No special tuning of the stack or obexapp. Sent to: * Motorola Razor V3xx ~85 KBytes/sec * Nokia N810 ~120 KBytes/sec * ThinkPad T500 (running Windows) ~150 KBytes/sec HTH, -- Alexandre Kovalenko (Олександр Коваленко)
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