Memory Architecture

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Question Tags Difficulty Success

1. Memory Hierarchy Latencies

memory_latencydram +3

Easy 81%

2. Struct Padding

struct_paddingalignment +3

Medium 68%

3. Memory Bus and Bandwidth

memory_bandwidthddr +3

Medium 55%

4. Bytes On The Wire

endiannessbyte-order +2

Medium 69%

5. Memory-Mapped I/O vs Port I/O

mmioport_io +3

Medium 67%

6. Cache Line Alignment

cache_line_alignmentalignas +3

Medium 83%

7. Memory Alignment Requirements

Memory ManagementBasics

Medium 45%

8. Four Counters One Line

false-sharingcache-coherence +2

Medium 53%

9. Eight Useful Bytes

cache-line-utilizationstruct-layout +2

Medium 42%

10. Whoever Touches It First

numafirst-touch +2

Hard 74%

11. It Scaled On My Laptop

false-sharingbenchmarking +2

Hard 64%

12. NUMA Architecture Impact

Memory ManagementConcurrency

Hard 30%

memory_latencydramcache_hierarchymemory_architecturearchitecturestruct_paddingalignmentsizeofmemory_bandwidthddrbus_widthendiannessbyte-orderhtonltype-punningmmioport_iodevice_registerscache_line_alignmentalignasfalse_sharingMemory ManagementBasicsfalse-sharingcache-coherencemultithreadingpaddingcache-line-utilizationstruct-layoutaos-vs-soamemory-bandwidthnumafirst-touchmemory-policyopenmpbenchmarkingConcurrency+1+2+3+4+5

Learning Resources

Inside the Machine, Chapters 1, 9, 11

But How Do It Know, pg. 43 - 46, 51 - 57, 66, 129 - 134

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