mbed-os

Commit Graph

Author	SHA1	Message	Date
Seppo Takalo	50eb243762	Don't consume 36 kB just for Ethernet buffers. Kintis EMAC is consuming 16 rinbuffers for input, and 8 buffers for output. This is over-use because input packets are immediately allocated from heap when passed to LwIP. Therefore the number can be creatly reduced.	2019-01-02 19:05:16 +02:00
Kevin Bracey	30e68f3201	Kinetis EMAC: Make number of buffers configurable 16 RX buffers and 8 TX buffers is probably excessive. Nanostack version of driver successfully used 4+4, and data pump should be broadly equivalent. This means that switching K64F devices from Nanostack to EMAC increases base heap usage by 18K - observed in Nanostack border router builds. Add a config option to make it possible to lower the number of buffers. Defer consideration of lowering the default to later.	2018-06-06 13:30:01 +03:00

Author

SHA1

Message

Date

Seppo Takalo

50eb243762

Don't consume 36 kB just for Ethernet buffers.

Kintis EMAC is consuming 16 rinbuffers for input, and 8 buffers for output.
This is over-use because input packets are immediately allocated from
heap when passed to LwIP. Therefore the number can be creatly reduced.

2019-01-02 19:05:16 +02:00

Kevin Bracey

30e68f3201

Kinetis EMAC: Make number of buffers configurable

16 RX buffers and 8 TX buffers is probably excessive. Nanostack
version of driver successfully used 4+4, and data pump should be
broadly equivalent.

This means that switching K64F devices from Nanostack to EMAC increases
base heap usage by 18K - observed in Nanostack border router builds.

Add a config option to make it possible to lower the number of buffers.
Defer consideration of lowering the default to later.

2018-06-06 13:30:01 +03:00

2 Commits (tools-release-prep)