[riot-notifications] [RIOT] tcb_t is too big (#303)

Oleg Hahm notifications at github.com
Tue Nov 5 04:18:07 CET 2013

The tcb_t struct that every thread allocates is currently 68 bytes on a 32-bit architecture:
sizeof(tcb_t):          68
             sizeof(sp):            4
             sizeof(status):        2
             sizeof(pid):           2
             sizeof(priority):      2
             sizeof(rq_entry):      12
             sizeof(wait_data):     4
             sizeof(msg_waiters):   12
             sizeof(msg_queue):     12
             sizeof(msg_array):     4
             sizeof(name):          4
             sizeof(stack_start):   4
             sizeof(stack_size):    4
Optional fields like `msg_queue` could be outsourced to an extended tcb. `rq_entry` might be transformed into a scheduler variable. (Have to think about this.

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