> On May 25, 2017, at 6:51 PM, Matt Burke <[email protected]> wrote:
>
> On 25/05/2017 04:03, Sergey Oboguev wrote:
>> Superficially looking at (AS)MP VMS code, it appears that the following
>> should (hopefully) suffice for correct operation:
>>
>> 1. BBSSI and BBCCI should acquire a lock when accessing the memory location.
>> A simplistic implementation may use one lock for the whole memory (or the
>> whole MA780 memory bank). A more sophisticated implementation may use a
>> bucket of locks, with a particular physical address within an MA bank
>> mapping to a corresponding lock in the bucket (with a lock being shared by a
>> range of MA physical addresses) -- but that would probably be an overkill
>> for 2-CPU config which is not particularly heavy on synchronization.
>
> My plan was to use just one global lock which would be set on the read cycle
> and cleared on the write cycle.
If you have access to suitabl atomic operations, you shouldn't even need a
lock. That would be nice.
paul
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