Question

在问题cpu cache performance. store misses vs load misses中，没有关于在哪里找到由perf列出的事件文件的答案

我无法通过man perf和perf help list找到它，

我阅读了Intel @ 64和AMD64的事件文档，其事件格式如下所示 Last Level Cache References — Event select 2EH, Umask 4FH 那它在哪里？

编辑：要清楚，我想通过perf list

查找事件列表的文档

Answer 1

Linux内核中的perf子系统的源代码记录了perf branches cycles之类的预定义LLC-load-misses事件列表。该列表部分映射到不同CPU模型和微架构的各种硬件事件。使用来自ocperf.py的andikleen's pmu-tools（和toplev.py）（如果您的CPU是英特尔）可能更有用，其中包含来自英特尔文档的事件名称（ocperf不是官方的，但它是由英特尔员工编写的）并使用来自https://download.01.org/perfmon/ https://download.01.org/perfmon/readme.txt＆＃34的官方列表;此软件包包含英特尔处理器的性能监控事件列表＆＃34;）

对于x86和x86_64 perf，这些（古老的）预定义/通用名称映射到arch/x86/events目录，例如对于所有英特尔酷睿微架构检查arch/x86/events/intel/core.c并通过其代码搜索微架构名称（Core，Core2，NHM = Nehalem，WSM = Westmere，SNB = SandyBridge，IVB = IvyBridge，HSW = HaSWell，BDW = BroaDWell，SKL = SKyLake，SLM = SiLverMont等来自lists和{{3} }）。对于Skylake，amd处有结构，我们看到PREFETCH计数器没有映射到所有缓存（＆＃34;不支持＆＃34;）

 static __initconst const u64 skl_hw_cache_event_ids

 [ C(L1D ) ] = {
    [ C(OP_READ) ] = {
        [ C(RESULT_ACCESS) ] = 0x81d0,  /* MEM_INST_RETIRED.ALL_LOADS */
        [ C(RESULT_MISS)   ] = 0x151,   /* L1D.REPLACEMENT */
    },
    [ C(OP_WRITE) ] = {
        [ C(RESULT_ACCESS) ] = 0x82d0,  /* MEM_INST_RETIRED.ALL_STORES */
        [ C(RESULT_MISS)   ] = 0x0,

...
 [ C(LL  ) ] = {
    [ C(OP_READ) ] = {
        [ C(RESULT_ACCESS) ] = 0x1b7,   /* OFFCORE_RESPONSE */
        [ C(RESULT_MISS)   ] = 0x1b7,   /* OFFCORE_RESPONSE */
    },
    [ C(OP_WRITE) ] = {
        [ C(RESULT_ACCESS) ] = 0x1b7,   /* OFFCORE_RESPONSE */
        [ C(RESULT_MISS)   ] = 0x1b7,   /* OFFCORE_RESPONSE */
    },

和额外的结构，为OFFCORE_RESPONSE等事件定义额外的标志/掩码：

static __initconst const u64 skl_hw_cache_extra_regs 
 [ C(LL  ) ] = {
    [ C(OP_READ) ] = {
        [ C(RESULT_ACCESS) ] = SKL_DEMAND_READ|
                       SKL_LLC_ACCESS|SKL_ANY_SNOOP,
        [ C(RESULT_MISS)   ] = SKL_DEMAND_READ|
                       SKL_L3_MISS|SKL_ANY_SNOOP|
                       SKL_SUPPLIER_NONE,
    },
    [ C(OP_WRITE) ] = {
        [ C(RESULT_ACCESS) ] = SKL_DEMAND_WRITE|
                       SKL_LLC_ACCESS|SKL_ANY_SNOOP,
        [ C(RESULT_MISS)   ] = SKL_DEMAND_WRITE|
                       SKL_L3_MISS|SKL_ANY_SNOOP|
                       SKL_SUPPLIER_NONE,
 [ C(NODE) ] = {
    [ C(OP_READ) ] = {
        [ C(RESULT_ACCESS) ] = SKL_DEMAND_READ|
                       SKL_L3_MISS_LOCAL_DRAM|SKL_SNOOP_DRAM,
        [ C(RESULT_MISS)   ] = SKL_DEMAND_READ|
                       SKL_L3_MISS_REMOTE|SKL_SNOOP_DRAM,
    },
    [ C(OP_WRITE) ] = {
        [ C(RESULT_ACCESS) ] = SKL_DEMAND_WRITE|
                       SKL_L3_MISS_LOCAL_DRAM|SKL_SNOOP_DRAM,
        [ C(RESULT_MISS)   ] = SKL_DEMAND_WRITE|
                       SKL_L3_MISS_REMOTE|SKL_SNOOP_DRAM,

哪里可以找到perf事件文件

1 个答案: