From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Marcel Holtmann To: BlueZ users In-Reply-To: <80236d750705290911g619e3d9eu8c6cda81c884b44d@mail.gmail.com> References: <80236d750705290911g619e3d9eu8c6cda81c884b44d@mail.gmail.com> Date: Tue, 29 May 2007 22:20:54 +0200 Message-Id: <1180470054.21432.141.camel@aeonflux.holtmann.net> Mime-Version: 1.0 Subject: Re: [Bluez-users] [Bluez Users] Page timeout during sdp on heavy traffic. Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net Hi Emanuele, > I wrote a little application to simulate an heavy traffic. > Simply discovers devices using hci0 and for each device discovered > starts a thread to search service using hci1. > Rinse and repeat forever. > Usually I have 5-6 bluetooth devices in the area. > I'm not using d-bus messaging (yet) but i guess i'll try that too to > check > > Anyway I noticed a large number of timeouts during search services on > devices who previously returned correct service record. I have no idea how often I have to say that, but you can't page devices at the same time. The chips simply don't support that. The same reason why you can run an inquiry and page at the same time. It is not possible. Period. And this means you have to serialize the SDP service requests. New kernel versions try to handling pending page attempts for piconet creation, but that is also limited. And simultaneous name resolve request can also cause troubles. Regards Marcel ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users