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PRAM consistency (pipelined random access memory) also known as FIFO consistency.
All processes see memory writes from one process in the order they were issued from the process.[1]
Writes from different processes may be seen in a different order on different processes. Only the write order needs to be consistent, thus the name pipelined.
PRAM consistency is easy to implement. In effect it says that there are no guarantees about the order in which different processes see writes, except that two or more writes from a single source must arrive in order, as though they were in a pipeline.
P1:W(x)1
P2: R(x)1W(x)2
P3: R(x)1R(x)2
P4: R(x)2R(x)1
Time ---->
Fig: A valid sequence of events for PRAM consistency.
The above sequence is not valid for Causal consistency because W(x)1 and W(x)2 are causal, so different processes must read it in the same sequence.
^Lipton/Sandberg (1988). PRAM: a scalable shared memory.
PRAMconsistency (pipelined random access memory) also known as FIFO consistency. All processes see memory writes from one process in the order they were...
in different order from different processes. PRAMconsistency is weaker than processor consistency. PRAM relaxes the need to maintain coherence to a location...
consistent. Additionally, causal consistency implies PRAMconsistency, but not vice versa. Here is an example of causal consistency. Causal relations are respected...
than the PRAMConsistency model because it requires Cache Coherence. Another difference between Causal Consistency and Processor Consistency is that Processor...
depends heavily on the given graph partition. As for runtime, on a CRCW-PRAM model that allows fetch-and-decrement in constant time, this algorithm runs...
theoretical model is the parallel random-access machines (PRAM) that are used. However, the classical PRAM model assumes synchronous access to the shared memory...
Calvo, Miguel (2019). Construyendo la Tabla Periódica. Zaragoza, Spain: Prames. p. 407. ISBN 978-84-8321-908-9. Emsley, J. (2011). "The Periodic Table"...
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Calvo, Miguel (2019). Construyendo la Tabla Periódica. Zaragoza, Spain: Prames. p. 118. ISBN 978-84-8321-908-9. Greenwood, Norman N.; Earnshaw, Alan (1997)...
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