tree e5da74d89e17fb2f9d4068ee65b448e3c9bdf8c6
parent 8cb695fe93088e122b408186c7a13f5d5291a347
author Toshi Kikuchi <toshik@google.com> 1485380648 -0800
committer Toshi Kikuchi <toshik@google.com> 1485380682 -0800

lwipopts: increase MEMP_NUM_PBUF for send performance

MEMP_NUM_PBUF is the number of PBUF_REF-type pbufs, which points
to the data somewhere else instead of containing it.

For send traffic, no new regular pbuf is allocated from PBUF_POOL,
rather PBUF_REF-type pbuf is used to point to the application data.

Change-Id: Ia1d7e4c9705df4c44fef7b912e1a3f0f2abd2b66