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DPS921/Group 8

28 bytes added, 23:13, 25 November 2018
Padding
== Padding ==
One way to eliminating false sharing is to add in padding to the data. The idea of padding in general is for memory alignment, by utilizing padding we can eliminate cache line invalidation interfering with read and write of elements.  How padding works: Let's say we have an int element num[i] = 10; in memory this would be stored as 40 bytes ( 10 * 4 byte) and a single standard cache line is 64 byte which means 24 byte needs to be padded otherwise another element will occupy that region which will result in 2 or more thread accessing same cache line causing false sharing. [[File:Cacheline1.jpeg]]
== Synchronization ==
=Conclusion =
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