On Wed, Jun 26, 2019 at 11:17 AM hariprasad kelam <hariprasad.kelam@xxxxxxxxx> wrote: > > Hi subhashini, > > On Wed, 26 Jun, 2019, 10:56 AM Subhashini Rao Beerisetty, <subhashbeerisetty@xxxxxxxxx> wrote: >> >> On Wed, Jun 26, 2019 at 7:44 AM Hariprasad Kelam >> <hariprasad.kelam@xxxxxxxxx> wrote: >> > >> > On Tue, Jun 25, 2019 at 10:26:54PM +0530, Subhashini Rao Beerisetty wrote: >> > Hi Subhashini, >> > >> > Please see inline, >> > > Hi All, >> > > >> > > I’ve two Bluetooth dongles and connected to two Linux >> > > systems(hostname1, hostname2). I’ve a test executable and it creates a >> > > BT link does the file transfer and calculates the throughput. >> > > >> > Are these dongle supports classic mode or Ble? >> It supports classic mode. >> >> > Which profile are you using to establish connection between these two? ( >> > PAN, ..etc) >> > > I repeated the same test with the same BT dongles on another >> > > different Linux systems(hostname3, hostname4), here I’m getting less >> > > data rate. >> > > >> > After inserting dongles to host are you getting serial interface >> > /dev/tty* or hci interface ? >> Using serial interface /dev/tty* >> If it's inbuilt serial profile ..kernel simply creates serial interface. > > You may focus on serial driver . Does kernel has any tools to identify the costly(long time taken) API's? > > > > >> > If its hci interface ,you can use hcidump to see packets and check MTU >> > size >> > > Here first I want to narrow down whether the issue is below device >> > > driver level or above device driver level and where the bottleneck is? >> > > which tools will help me to debug this kind of issue? >> > > >> > I think before jumping into driver level ,its better to ensure all >> > bluetooth parameters are same on both the setups. >> Except the kernel version(hostname1 & 2 are having same kernel and it >> differs with hostname3 & 4 kernel version) rest all other stuff is >> same. So I'd like to know how to know which part of kernel mode >> functions causing more delay and any tools are there to debug these >> issues? >> >> > >> > Thanks, >> > Hariprasad k >> > > Thanks >> > > >> > > _______________________________________________ >> > > Kernelnewbies mailing list >> > > Kernelnewbies@xxxxxxxxxxxxxxxxx >> > > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
