BLE: It is no longer possible to send out data Fast!

[CodingGhost]

Description of defect

Since the update to cordio, it seems impossible to send out a fast datastream.
we used to do it like the NORDIC devs recommended, by transmitting 20 bytes, as fast as we can, and repeat it, until the softdevice wont give error no 5 (busy). This was easy and very fast.
Cordio never givey me error 5, it always is no error, but if I send too fast, data gets lost.
another way would be to register the onDataSent event, but strangely this does not give back any information about the handle that the event is referring to, so its useless if you have more than 1 device connected.
Im not sure if these are bugs, but either way, its very Important!!
How can we do this with cordio?

Target(s) affected by this defect ?

NRF52

Toolchain(s) (name and version) displaying this defect ?

PlatformIO 4.2.1

What version of Mbed-os are you using (tag or sha) ?

5.14.1

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

none

How is this defect reproduced ?

try to send out data to multiple devices as fast as possible

[0xc0170]

cc @ARMmbed/mbed-os-pan

[ciarmcom]

@CodingGhost thank you for the update.It appears however that there is still some missing information:

Could you add some more detail to the description? A good description should be at least 25 words.

Please update the issue header with the missing information.
NOTE: If there are fields which are not applicable then please just add 'n/a' or 'None'.This indicates to us that at least all the fields have been considered.

[ciarmcom]

@CodingGhost thank you for the update.It appears however that there is still some missing information:

Could you add some more detail to the description? A good description should be at least 25 words.

Please update the issue header with the missing information.
NOTE: If there are fields which are not applicable then please just add 'n/a' or 'None'.This indicates to us that at least all the fields have been considered.

[adbridge]

@CodingGhost you have received the above comment because you have deleted parts of the issue template. Could you please not do this in the future. In this case you deleted '### Description of defect', we will correct it on this occasion.

[CodingGhost]

noted, thanks.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-2294

[pan-]

@CodingGhost Normally you'd use onDataSent to saturate the tx queue -which is shared between all connections - of the controller. It is a defect that the connection handle isn't reported in the callback.