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cache model of ppc

DISCUSSION Felix Schmidt 3 participants 3 messages Aug 20, 2008

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Dear,

I some questions about the PowerPC cache model.

How many caches are there?
How many caches are in multi-core systems? do you have a L1 cache per cpu and one shared L2? or is there a victim L3 cache?

can you tell me something about the path through the cache? for example I look up for data in L1, but this was a miss. Then i look up in L2 this was also a miss. but the date will be in another L1 cache of another cpu. Is there a 1.5 or 2.5 hit?

can you help me please?
this is for my bachelorthesis

thanks a lot

felix
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Quoted 6 lines · Felix Schmidt

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Dear,

I some questions about the PowerPC cache model.

It depends greatly on the core, chip, and cache used. That varies widely across the PPC universe.

josh

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In reply to Felix Schmidt
Quoted 10 lines · Felix Schmidt

I some questions about the PowerPC cache model.

How many caches are there?
How many caches are in multi-core systems? do you have a L1 cache per cpu and one shared L2? or is there a victim L3 cache?

can you tell me something about the path through the cache? for example I look up for data in L1, but this was a miss. Then i look up in L2 this was also a miss. but the date will be in another L1 cache of another cpu. Is there a 1.5 or 2.5 hit?

This is all dependent on the particular CPU you're talking about, and should be described in its manual.

-Scott