5 Replies Latest reply: Apr 13, 2011 2:13 PM by compres RSS

writing single bytes to same MPB

christgau Community Member
Currently Being Moderated

Hi everybody,


the following questions might be simple, but I'm not getting the answer by myself.


Suppose that you have three processes (A, B and C) running on the SCC on different cores. B and C send messages to A.


The messages have a size of two bytes. The senders will write in different locations of A's MPB. Let's say, B writes at address 0x0 and C writes at address 0x2. The message from B arrives at the MPB of A just before the message from C does.


Does A get the correct messages from both senders when reading from the MPB (including MPBT cache invalidate)? Or can the message from B be overwritten by C on some way?


(Remark: B and C are not sending the messages in multiples of cachelines)


Thanks for your help



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