[GitHub] [mynewt-nimble] haukepetersen commented on issue #373: L2CAP COC: buffer configuration errors

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haukepetersen commented on issue #373: L2CAP COC: buffer configuration errors
URL: https://github.com/apache/mynewt-nimble/issues/373#issuecomment-475247241
 
 
   To add to the (or better my) confusion: when setting the `L2CAP_COC_MTU` to `100`, the throughput of my test setup is significantly better then setting the same value to `250`, roughly by the factor of 2. I actually would expect a similar performance as the link layer MTU should be the same(?!), so I wonder where this heavy decrease in throughput in coming from...
   
   Test setup:
   - two nodes running NimBLE (a7b3c939146e735b59d55bff740c906bde6f86f9) on RIOT: https://github.com/haukepetersen/RIOT/tree/add_ccnble/examples/l2cap_echo
   - one is a simple L2CAP COC echo server, simply sending everything back it receives on a given L2CAP COC channel
   - the other sends an increasing payload, starting from 4 bytes up to 5000 bytes. Each time a chunk is sent, the client waits for the packet to be returned by the server.

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