Is LFENCE serializing on AMD processors?

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More Related Contents:

  1. Which cache mapping technique is used in intel core i7 processor?
  2. If I don’t use fences, how long could it take a core to see another core’s writes?
  3. Where is the Write-Combining Buffer located? x86
  4. What are the costs of failed store-to-load forwarding on x86?
  5. Are loads and stores the only instructions that gets reordered?
  6. Globally Invisible load instructions
  7. What exactly happens when a skylake CPU mispredicts a branch?
  8. Why is x86 little endian?
  9. Can the simple decoders in recent Intel microarchitectures handle all 1-µop instructions?
  10. how are barriers/fences and acquire, release semantics implemented microarchitecturally?
  11. Are load ops deallocated from the RS when they dispatch, complete or some other time?
  12. Why did Intel change the static branch prediction mechanism over these years?
  13. Are two store buffer entries needed for split line/page stores on recent Intel?
  14. What is the maximum possible IPC can be achieved by Intel Nehalem Microarchitecture?
  15. Why is the loop instruction slow? Couldn’t Intel have implemented it efficiently?
  16. Micro fusion and addressing modes
  17. How exactly do partial registers on Haswell/Skylake perform? Writing AL seems to have a false dependency on RAX, and AH is inconsistent
  18. Why is Skylake so much better than Broadwell-E for single-threaded memory throughput?
  19. How are x86 uops scheduled, exactly?
  20. Does lock xchg have the same behavior as mfence?
  21. 32-byte aligned routine does not fit the uops cache
  22. Does an x86 CPU reorder instructions?
  23. How has CPU architecture evolution affected virtual function call performance?
  24. Why flush the pipeline for Memory Order Violation caused by other logical processors?
  25. Why does Intel hide internal RISC core in their processors?
  26. Does hardware memory barrier make visibility of atomic operations faster in addition to providing necessary guarantees?
  27. What is the difference between Trap and Interrupt?
  28. How do the store buffer and Line Fill Buffer interact with each other?
  29. What specifically marks an x86 cache line as dirty – any write, or is an explicit change required?
  30. Half-precision floating-point arithmetic on Intel chips

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