（上課對話）
顏老：那個 cache 可以調參數啊
同學：可是我們不知道 cache 多大要怎麼調 Orz
er...
就假設 Intel Pentium 4 好了，麻煩助教講一下吧 :P
Level 1 Execution Trace Cache
The 90 nm Pentium 4 processor features 16-KB data cache
compared to 8-KB on the 0.13 micron Pentium 4 processor.
In addition to the data cache, the Pentium 4 processor
includes an Execution Trace Cache that stores up to 12-K
decoded micro-ops in the order of program execution.
This increases performance by removing the decoder from
the main execution loop and makes more efficient usage
of the cache storage space since instructions that are
branched around are not stored. The result is a means
to deliver a high volume of instructions to the pro-
cessor's execution units and a reduction in the overall
time required to recover from branches that have been
mis-predicted.
L2 Cache
2.40 GHz 512KB
2.40A GHz 1MB
2.40B GHz 512KB
2.40C GHz 512KB
2.60 GHz 512KB
2.60C GHz 512KB
2.66 GHz 512KB
2.80 GHz 512KB
2.80C GHz 512KB
3 GHz 512KB
3.06 GHz 512KB
3.20 GHz 512KB
3.40 GHz 512KB
3.40 GHz 512KB L2, 2MB L3
2.80A GHz 1MB
2.80E GHz 1MB
3E GHz 1MB
3.20E GHz 1MB
3.40E GHz 1MB
2.80 GHz 1MB
3 GHz 1MB
3.20 GHz 1MB
3.40 GHz 1MB
3.60 GHz 1MB
3.80 GHz 1MB
3.46 GHz 512KB L2, 2MB L3
3.73 GHz 2MB
3.80 GHz 2MB
3.60 GHz 2MB
3.40 GHz 2MB
3.20 GHz 2MB
3 GHz 2MB
3.80 GHz 2MB
3.60 GHz 2MB
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