Mark Roulo (nothanks@xxx.com) on 8/3/10 wrote:
---------------------------
>Aaron Spink (aaronspink@notearthlink.net) on 8/3/10 wrote:
>---------------------------
>>Richard Cownie (tich@pobox.com) on 8/3/10 wrote:
>>---------------------------
>>And if they don't fit in
>>>the rather small L1 caches, then you're not going to get
>>>a 4x or 6x speedup from using multiple cores, because
>>>everything will go through the shared L2 cache. [/quote]
>>
>>Which Intel processors have shared L2 cache?
>>
>
>Some pre-Nehalem Intel chips had large (2MB-ish) shared L2 caches.
>
>-Mark Roulo
>


2MB is for under $100 Pentium-dual-core.
Mainstream 120-to-200 USD C2D parts have either 4MB (old, Merom) or 6MB (new, Penryn) of shared L2 cache.