x86/util/mem-events.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include "util/pmu.h"
0003 #include "map_symbol.h"
0004 #include "mem-events.h"
0005
0006 static char mem_loads_name[100];
0007 static bool mem_loads_name__init;
0008 static char mem_stores_name[100];
0009
0010 #define MEM_LOADS_AUX       0x8203
0011 #define MEM_LOADS_AUX_NAME     "{%s/mem-loads-aux/,%s/mem-loads,ldlat=%u/}:P"
0012
0013 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
0014
0015 static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
0016     E("ldlat-loads",    "%s/mem-loads,ldlat=%u/P",  "%s/events/mem-loads"),
0017     E("ldlat-stores",   "%s/mem-stores/P",      "%s/events/mem-stores"),
0018     E(NULL,         NULL,               NULL),
0019 };
0020
0021 struct perf_mem_event *perf_mem_events__ptr(int i)
0022 {
0023     if (i >= PERF_MEM_EVENTS__MAX)
0024         return NULL;
0025
0026     return &perf_mem_events[i];
0027 }
0028
0029 bool is_mem_loads_aux_event(struct evsel *leader)
0030 {
0031     if (perf_pmu__find("cpu")) {
0032         if (!pmu_have_event("cpu", "mem-loads-aux"))
0033             return false;
0034     } else if (perf_pmu__find("cpu_core")) {
0035         if (!pmu_have_event("cpu_core", "mem-loads-aux"))
0036             return false;
0037     }
0038
0039     return leader->core.attr.config == MEM_LOADS_AUX;
0040 }
0041
0042 char *perf_mem_events__name(int i, char *pmu_name)
0043 {
0044     struct perf_mem_event *e = perf_mem_events__ptr(i);
0045
0046     if (!e)
0047         return NULL;
0048
0049     if (i == PERF_MEM_EVENTS__LOAD) {
0050         if (mem_loads_name__init && !pmu_name)
0051             return mem_loads_name;
0052
0053         if (!pmu_name) {
0054             mem_loads_name__init = true;
0055             pmu_name = (char *)"cpu";
0056         }
0057
0058         if (pmu_have_event(pmu_name, "mem-loads-aux")) {
0059             scnprintf(mem_loads_name, sizeof(mem_loads_name),
0060                   MEM_LOADS_AUX_NAME, pmu_name, pmu_name,
0061                   perf_mem_events__loads_ldlat);
0062         } else {
0063             scnprintf(mem_loads_name, sizeof(mem_loads_name),
0064                   e->name, pmu_name,
0065                   perf_mem_events__loads_ldlat);
0066         }
0067         return mem_loads_name;
0068     }
0069
0070     if (i == PERF_MEM_EVENTS__STORE) {
0071         if (!pmu_name)
0072             pmu_name = (char *)"cpu";
0073
0074         scnprintf(mem_stores_name, sizeof(mem_stores_name),
0075               e->name, pmu_name);
0076         return mem_stores_name;
0077     }
0078
0079     return (char *)e->name;
0080 }