maximse the use of cache in your code

Hi all,

What are things you will follow in order to maximize the use of cache

Thanks, Zaheer

Reply to
Zaheer
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Keep your code and data small, think about the locality of references (especially if your cache lines are wide and you are using dram of some sort), and be careful how you deal with arrays in loops.

Reply to
David Brown

Is it Instruction cache / data cache ?

Karthik Balaguru

Reply to
karthikbalaguru

Well, first ofall, I'll ask Usenet to do my homework for me.

pete

--
pete@fenelon.com "irk the purists - if you've never then you ought."
Reply to
Pete Fenelon

I'd also ask "why would you want to?": This isn't a real world question. If the overall goal is to improve performance of existing code, this isn't the obvious thing to consider. Optimising data cache utilisation is a matter of ensuring good locality of reference

- this hinges on the fundamental design of the data structures concerned; it is best to consider this at the outset because an optimisation later on may prove fiendishly difficult. In a new system it is one of many factors to consider, but a structure that makes good use of the cache may be more complicated, more redundant and less 'natural' than its 'unoptimised' equivalent.

Optimising the instruction cache is is primarily about good design methods: keep your code small, clean and straightforward. Reuse functions whereever possible and make sure your innermost loops are fast and tight.

--
Andrew Smallshaw
andrews@sdf.lonestar.org
Reply to
Andrew Smallshaw

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Reply to
karthikbalaguru

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