10 Oct
2009
10 Oct
'09
4:51 a.m.
Hello: I pushed this old mail to top and i want to know something about UTCB IPC.
UTCB values stays the same. It depends on the generated stub whether UTCB IPC is actually used or not. Sending a flexpage, usually disqualifies the usage of UTCB IPC.
Do you mean, once a flexpage is sent no UTCB IPC should be sent after ?
I am interested in the question above because in the Thread::transfer_msg function as this: 1343 sender_regs->copy_msg (dst_regs); 1344 1345 copy_utcb_to (tag, receiver); It seems every time the utcb ipc will follow the register ipc. Is it right? Cheng Guanghui