Tag: cpu-architecture

50 votes
3 answers
1.7K views
What is a retpoline and how does it work?

In order to mitigate against kernel or cross-process memory disclosure (the Spectre attack), the Linux kernel1

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Gigi
0 1 0 9
asked 07 September, 2021
52 votes
4 answers
667 views
How do I achieve the theoretical maximum of 4 FLOPs per cycle?

How can the theoretical peak performance of 4 floating point operations (double precision) per cycle be achiev

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Dorian
0 1 0 9
asked 07 September, 2021
63 votes
27 answers
2.9K views
Why is processing a sorted array faster than processing an unsorted array?

Here is a piece of C++ code that shows some very peculiar behavior. For some strange reason, sorting the data

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Boyd
0 1 0 9
asked 07 September, 2021