Hello Luiz, I tried to test with your patch linux to linux which will use L2CAP but still see the same low throughput. On Fri, Feb 14, 2020 at 7:51 AM Amit K Bag <amit.k.bag@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello Luiz, > > I am not sure what changes in kernel causing low throughput. If I get > any clue I will let you know. > I wil lalso test your patch with linux - linux and update the result. > > On Fri, Feb 14, 2020 at 6:18 AM Luiz Augusto von Dentz > <luiz.dentz@xxxxxxxxx> wrote: > > > > Hi Amit, > > > > On Thu, Feb 13, 2020 at 3:32 AM Amit K Bag > > <amit.k.bag@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > Hello Luiz, > > > > > > I tested with the patch you have mentioned but not getting any better > > > throughput. > > > Please have a look at the log attached. > > > > > > We are using below configuration for linux > > > - Kernel : 4.19.102 > > > - OS : ubuntu 18.04.2 LTS > > > - Bluez -5.48 > > > > > > For other machine we are using windows > > > > I think there is some work to be done to work with RFCOMM since we are > > only doing this for L2CAP, I will have a look later this week, btw > > have you look into any difference we may have between these kernels? > > Or actually in what combination they appear because there could be an > > isolated problem in either the kernel or the userspace changes. > > > > > On Mon, Feb 10, 2020 at 11:03 PM Luiz Augusto von Dentz > > > <luiz.dentz@xxxxxxxxx> wrote: > > > > > > > > Hi Amit, > > > > > > > > On Mon, Feb 10, 2020 at 3:20 AM Amit K Bag > > > > <amit.k.bag@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > > > > > Hello All, > > > > > > > > > > I am tring to test the OPP throughput in linux. > > > > > I transferred between 2 machines having ubuntu 16.04 with bluez > > > > > version 5.44 in that I am getting 1.4mbps speed. > > > > > > > > > > Kernel : 4.14.13 > > > > > OS : ubuntu 18.04.2 LTS > > > > > Bluez -5.44 > > > > > > > > > > I am using a 12 MB of audio file. > > > > > But the same file when I transferred between 2 machines having ubuntu > > > > > 18.04 the speed is significantly reduced. > > > > > > > > > > Kernel : 4.18.0-15-generic > > > > > OS : ubuntu 18.04.2 LTS > > > > > Bluez -5.48 > > > > > > > > > > Could someone tell me why its reduced in ubuntu 18.04 > > > > > > > > I don't think we change anything on Obexd related to that so perhaps > > > > it is something related to the L2CAP MTU? We could try setting the MTU > > > > to 0 so it automatically picks the matching MTU if you do have the > > > > following patch applied to your kernel: > > > > > > > > Bluetooth: Auto tune if input MTU is set to 0 > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz
