Specifications

Computer Architecture and Maintenance (G-Scheme-2014)
faster multicore processors such as the Intel Core i7 and AMD Phenom II and FX
processors.
L3 cache proves especially useful in multicore processors, where the L3 is generally
shared among all the cores. Both Intel and AMD use L3 cache in most of their current
processors because of the benefits to multicore designs.
+Cache Information for the Intel Core i5-2500 (Sandy Bridge)
These screenshots illustrate two examples of six-core processors with L1, L2, and L3
cache from both Intel (above) and AMD (below):
Cache information for the AMDPhenom II X6 1055T
Just as with the L1 cache, most L2 caches have a hit ratio also in the 90% range;
therefore, if you look at the system as a whole, 90% of the time it runs at full speed (233
MHz in this example) by retrieving data out of the L1 cache. Ten percent of the time it
slows down to retrieve the data from the L2 cache. Ninety percent of the time the
processor goes to the L2 cache, the data is in the L2, and 10% of that time it has to go to
the slow main memory to get the data because of an L2 cache miss. So, by combining
both caches, our sample system runs at full processor speed 90% of the time (233 MHz
in this case), at motherboard speed 9% (90% of 10%) of the time (66 MHz in this case),
Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)
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