VTUNE：BUS_TRAN_ANY与BUS_TRAN_MEM 事件

[shelly_30]

1、按定义，BUS_TRAN_ANY包含BUS_TRAN_MEM ，　可为什么测试结果BUS_TRAN_ANY比BUS_TRAN_MEM 小？
2、MEM_LOAD_RETIRED.L2_HIT事件的定义是这样的：Retired loads that hit the l2 cache. 是不是等于国L2　CACHE　读命中（没有访问内存）个数？
3、被测事件中几乎没有写内存操作，就是说如果发生MISS应该基本上都上由读内存操作引起的。可是测试的结果中L1D_REPL 事件大约是MEM_LOAD_RETIRED.L1D_LINE_MISS事件数的2倍，为什么？根据事件定义个人不太理解MEM_LOAD_RETIRED.L1D_LINE_MISS（This event counts the number of load operations that miss the L1 dada cache and send a request to the L2 cache to fetch the missing cache line. That is the missing cache line fetching has not yet started.This evetn count is equal to the number of cache lines fetched from the L2 cache by retired loads.)
请高人指教。
鞠躬致谢！

[intel_zhenyuwang]

1. Ensure you are using same extension, e.g. ALL_AGENTS, and note that BUS_TRANS_MEM includes "invalidate transactions" which is not include in BUS_TRANS_ANY.

2.定义:REQUEST (REF), 访问. HIT, 命中, MISS, 不中

3.L1D_REPL 不仅包含了"L1 Data Cache", 还包含了"DTLB events"