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TIE-51256 Computer Architecture Arm o |IAKALA
exam 9.12.2013 :
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Calculators can be used KN j f t
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Dn A4oe syvä Omuanma
1. Explain shortly (max 2 lines of text): — simo - radan 1 == yt

2) stride (1p) — sceleen kreumstin, WSenY
b) EPIC (1p) ;  —
e) ROB (1p) -solet ette
d) SMT (1p)
€) strip mining (1p) - veit ate
£) IPC (1p) s.
2. Tumasulo algorithm. What is the main principle? Why it is used? (3p) SIKA 2Kh
Pesä Nerm
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3. Explain the differences between SIMD extensions and vector architectures? (4p) yi | IRA

4. VLIW Processor. Why VLIW processors were introduced? How they are different than
dynamically scheduled multi-issue machines? Why they have not been popular nowadays, i.e., what
kind of features make modern single-core processors more attracting than VLIWs ? (6p)

5. Interleaved memory system. What is the difference between non-interleaved and interleaved
memory system? Describe two principälorganizationsfor interleaveä memory system. Discuss the
advantages and shortcomings of interleaved memory systems compared to non-interleaved. (6p)

6. Assume a 64-byte cache memory, which uses 8-byte blocks. The cache is 2-way set associative
and uses LRU mechanism to replace blocks in the cache. Processor uses 16-bit virtual addresses to
access 16kbyte main memory. How many bits are needed for the tag fields in the cache? Draw
principal cache organization and explain your solution. (6p)

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