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Pe Small

726 days ago
Unfiled. Edited by Pe Small 726 days ago
  • `dsb`: 資料同步 barrier,比 `dmb` 更嚴格,要在所有它前面的 register 存取執行完畢後,才 execute (commit -> execute) 它後面的 register 存取指令
 
762 days ago
Unfiled. Edited by Pe Small 762 days ago
  • $ make perf_clear && make perf_opt
  • size of entry : 136 bytes
  • execution time of append() : 0.030530 sec
  • execution time of findName() : 0.001898 sec
  •  
  • Performance counter stats for './phonebook_opt' (5 runs):
  • 115,361      cache-misses              #   59.907 % of all cache refs      ( +- 11.57% ) [58.52%]
  • 192,568      cache-references                                              ( +- 11.71% ) [65.17%]
  • 1,208,995    L1-dcache-load-misses                                         ( +- 11.68% ) [75.58%]
  • 325,952      L1-dcache-store-misses                                        ( +-  0.90% ) [78.93%]
  • 0            L1-dcache-prefetch-misses                                                   [68.26%]
  • 33,716       L1-icache-load-misses                                         ( +- 20.43% ) [57.84%]
  •  
  •        0.043197326 seconds time elapsed                                    ( +- 13.02% )
  •  
 

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