Return-Path: Message-ID: <20030716002326.787.qmail@web10207.mail.yahoo.com> From: Aarti Kumar Subject: Re: [Bluez-devel] Measuring throughput using l2test gives very high value. To: bluez-devel@lists.sourceforge.net In-Reply-To: MIME-Version: 1.0 Sender: bluez-devel-admin@lists.sourceforge.net Errors-To: bluez-devel-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Date: Tue, 15 Jul 2003 17:23:26 -0700 (PDT) Content-Type: text/plain; CHARSET=us-ascii Hello, I am trying to measure the throughtput between two laptops with bluetooth connection. The l2test gives a very high value : in theranhe of 34567 kB/sec 76578 kB/sec. I am not able to understand what the problem is . Also the Time taken to tranfer the data is printed as 0.00 sec. Using following commands: Server : ./l2test -r Client : ./l2test -s baddr. Thanks, Aarti. --- Jonathan Paisley wrote: > On Fri, 11 Jul 2003 18:53:31 +0100, James > Courtier-Dutton wrote: > > > I have discovered that the performance of the > bluez stack is a problem > > when using the hci_usb.c driver. > > I cannot get it to send SCO packets quicker than > one urb per 40ms. As > > the headset needs one urb per 3ms, this is quite a > problem. I would also > > assume that other applications like file transfer > over bluetooth would > > be bad. > > Have you identified what's actually causing this > rate limit? It sounds > more like a scheduling issue to me than a > number-of-memory-copies problem. > > Would you consider sharing the code modifications > you have made thus far? > > I have been experimenting with two USB dongles with > the aim of making the > PC act as a headset (I don't have one). I have been > able to get reasonable > (although sometimes choppy audio) on the PC. That > is, the sound is being > received by the PC. I haven't yet managed to test > sending audio except for > /dev/zero. All this testing is with 2.4.20-mh10. > > The two dongles I have are the Mitsumi WIF-0402c and > the Sitecom CN-500, > which report as follows: > > Sitecom CN-500: > $ sudo /sbin/hciconfig hci0 revision > hci0: Type: USB > BD Address: 00:10:60:A2:E4:C2 ACL MTU: 192:8 > SCO MTU: 64:8 > HCI 16.4 > Chip version: BlueCore02 > Max key size: 56 bit > SCO mapping: HCI > > Mitsumi WIF-0402c: > $ sudo /sbin/hciconfig hci0 revision > hci0: Type: USB > BD Address: 00:A0:96:1D:4A:AA ACL MTU: 128:8 > SCO MTU: 64:8 > HCI 11.2 > Chip version: BlueCore01b > SCO mapping: HCI > > The Mitsumi accepts the SCO connection and then > gives up, whereas the > Sitecom is able to sustain the connection for as > long as I have tested > (<2minutes). The Mitsumi is much older, so I'm not > surprised there are > problems. However, both devices work okay in this > manner under Windows. > > > > > > ------------------------------------------------------- > This SF.net email is sponsored by: VM Ware > With VMware you can run multiple operating systems > on a single machine. > WITHOUT REBOOTING! Mix Linux / Windows / Novell > virtual machines at the > same time. Free trial click here: > http://www.vmware.com/wl/offer/345/0 > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel