Date: Thu, 22 Feb 2007 16:11:26 -0600 From: Eric Anderson <anderson@centtech.com> To: Maksim Yevmenkin <maksim.yevmenkin@gmail.com> Cc: "freebsd-bluetooth@freebsd.org" <freebsd-bluetooth@freebsd.org> Subject: Re: Prioritizing bluetooth devices? Message-ID: <45DE150E.3000500@centtech.com> In-Reply-To: <bb4a86c70702172005u8c0b3e4g2b868c9d19656d04@mail.gmail.com> References: <45D5F027.7060401@centtech.com> <bb4a86c70702161537s31097db1g488213cf739ab80f@mail.gmail.com> <45D68F37.7040105@centtech.com> <bb4a86c70702172005u8c0b3e4g2b868c9d19656d04@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 02/17/07 22:05, Maksim Yevmenkin wrote: > On 2/16/07, Eric Anderson <anderson@centtech.com> wrote: > > [...] > >>>> I have just set up my Treo 700p using bluetooth and kpilot to sync >>>> (thanks Bruce/Maksim!!!!). I notice that when I'm doing a backup of my >>>> palm and it's downloading a ton of stuff, my bluetooth connection is >>>> jammed full, so my bluetooth mouse is slow/lags. I don't have a >>>> bluetooth keyboard, but if I did (and if it worked), then I'm certain it >>>> would be present there too. >>>> >>>> So, my question is: is it possible to prioritize the bluetooth profiles >>>> so that HID gets priority over things like serial, LAN, etc? >>> in theory, this should not be happening, because each bluetooth slave >>> has reserved slots in which it can transmit data. also bluetooth hid >>> devices usually set "quality of service" parameters on bluetooth link. >>> >>> so, the problem could be either in the freebsd bluetooth code itself >>> (i.e. it uses very simple packet scheduler that might not behave very >>> well under load) or in packet scheduler in the device's "link >>> manager", i.e. firmware. >> The system was idle (CPU-wise) but I had the bluetooth link slammed >> transferring the entire contents of my palm (about 50MB). I've never >> had a problem otherwise, even when keeping both CPU's (this is a Core 2 >> Duo system) hammered. As soon as the transfer stopped, mouse was again >> responsive. > > did you notice if the system's interrupt load was high? > >>> other than setting "quality of service" parameters on bluetooth link >>> and/or forcing device to use only packets of certain size (i.e. 1,2 or >>> 3-slots, which, btw, likely to reduce throughput) i doubt there is >>> anything else (standard) that can be used to prioritize bluetooth >>> profiles. >>> >>> if you can, please try to switch to bluetooth 2.0 dongle (if you have >>> not already) >> As far as I know, this is a 2.0 dongle already (came with my laptop - >> Dell D820, so it's built in). > > it is csr chip based daughter card that looks like usb device, is it not? > > thanks, > max I don't know about the 'csr chip' part, but yes, it looks like an internal usb device. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology An undefined problem has an infinite number of solutions. ------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?45DE150E.3000500>