ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
mbed-os/features/netsocket/emac-drivers/TARGET_Freescale_EMAC/mbed_lib.json

8 lines
105 B
JSON
Raw Normal View History

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 10:13:19 +00:00
{
"name": "kinetis-emac",
"config": {
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.
2018-12-21 13:07:43 +00:00
"rx-ring-len": 2,
"tx-ring-len": 1
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 10:13:19 +00:00
}
}