#include <stddef.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <api/fs/fs.h> #include <linux/kernel.h> #include "mem-events.h" #include "debug.h" #include "symbol.h" #include "sort.h" unsigned int perf_mem_events__loads_ldlat = 30; #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s } struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "mem-loads"), E("ldlat-stores", "cpu/mem-stores/P", "mem-stores"), }; #undef E #undef E static char mem_loads_name[100]; static bool mem_loads_name__init; char *perf_mem_events__name(int i) { if (i == PERF_MEM_EVENTS__LOAD) { if (!mem_loads_name__init) { mem_loads_name__init = true; scnprintf(mem_loads_name, sizeof(mem_loads_name), perf_mem_events[i].name, perf_mem_events__loads_ldlat); } return mem_loads_name; } return (char *)perf_mem_events[i].name; } int perf_mem_events__parse(const char *str) { char *tok, *saveptr = NULL; bool found = false; char *buf; int j; /* We need buffer that we know we can write to. */ buf = malloc(strlen(str) + 1); if (!buf) return -ENOMEM; strcpy(buf, str); tok = strtok_r((char *)buf, ",", &saveptr); while (tok) { for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { struct perf_mem_event *e = &perf_mem_events[j]; if (strstr(e->tag, tok)) e->record = found = true; } tok = strtok_r(NULL, ",", &saveptr); } free(buf); if (found) return 0; pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str); return -1; } int perf_mem_events__init(void) { const char *mnt = sysfs__mount(); bool found = false; int j; if (!mnt) return -ENOENT; for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { char path[PATH_MAX]; struct perf_mem_event *e = &perf_mem_events[j]; struct stat st; scnprintf(path, PATH_MAX, "%s/devices/cpu/events/%s", mnt, e->sysfs_name); if (!stat(path, &st)) e->supported = found = true; } return found ? 0 : -ENOENT; } static const char * const tlb_access[] = { "N/A", "HIT", "MISS", "L1", "L2", "Walker", "Fault", }; int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info) { size_t l = 0, i; u64 m = PERF_MEM_TLB_NA; u64 hit, miss; sz -= 1; /* -1 for null termination */ out[0] = '\0'; if (mem_info) m = mem_info->data_src.mem_dtlb; hit = m & PERF_MEM_TLB_HIT; miss = m & PERF_MEM_TLB_MISS; /* already taken care of */ m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS); for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) { if (!(m & 0x1)) continue; if (l) { strcat(out, " or "); l += 4; } l += scnprintf(out + l, sz - l, tlb_access[i]); } if (*out == '\0') l += scnprintf(out, sz - l, "N/A"); if (hit) l += scnprintf(out + l, sz - l, " hit"); if (miss) l += scnprintf(out + l, sz - l, " miss"); return l; } static const char * const mem_lvl[] = { "N/A", "HIT", "MISS", "L1", "LFB", "L2", "L3", "Local RAM", "Remote RAM (1 hop)", "Remote RAM (2 hops)", "Remote Cache (1 hop)", "Remote Cache (2 hops)", "I/O", "Uncached", }; int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info) { size_t i, l = 0; u64 m = PERF_MEM_LVL_NA; u64 hit, miss; if (mem_info) m = mem_info->data_src.mem_lvl; sz -= 1; /* -1 for null termination */ out[0] = '\0'; hit = m & PERF_MEM_LVL_HIT; miss = m & PERF_MEM_LVL_MISS; /* already taken care of */ m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS); for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) { if (!(m & 0x1)) continue; if (l) { strcat(out, " or "); l += 4; } l += scnprintf(out + l, sz - l, mem_lvl[i]); } if (*out == '\0') l += scnprintf(out, sz - l, "N/A"); if (hit) l += scnprintf(out + l, sz - l, " hit"); if (miss) l += scnprintf(out + l, sz - l, " miss"); return l; } static const char * const snoop_access[] = { "N/A", "None", "Hit", "Miss", "HitM", }; int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info) { size_t i, l = 0; u64 m = PERF_MEM_SNOOP_NA; sz -= 1; /* -1 for null termination */ out[0] = '\0'; if (mem_info) m = mem_info->data_src.mem_snoop; for (i = 0; m && i < ARRAY_SIZE(snoop_access); i++, m >>= 1) { if (!(m & 0x1)) continue; if (l) { strcat(out, " or "); l += 4; } l += scnprintf(out + l, sz - l, snoop_access[i]); } if (*out == '\0') l += scnprintf(out, sz - l, "N/A"); return l; } int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info) { u64 mask = PERF_MEM_LOCK_NA; int l; if (mem_info) mask = mem_info->data_src.mem_lock; if (mask & PERF_MEM_LOCK_NA) l = scnprintf(out, sz, "N/A"); else if (mask & PERF_MEM_LOCK_LOCKED) l = scnprintf(out, sz, "Yes"); else l = scnprintf(out, sz, "No"); return l; } int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_info) { int i = 0; i += perf_mem__lvl_scnprintf(out, sz, mem_info); i += scnprintf(out + i, sz - i, "|SNP "); i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info); i += scnprintf(out + i, sz - i, "|TLB "); i += perf_mem__tlb_scnprintf(out + i, sz - i, mem_info); i += scnprintf(out + i, sz - i, "|LCK "); i += perf_mem__lck_scnprintf(out + i, sz - i, mem_info); return i; } int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi) { union perf_mem_data_src *data_src = &mi->data_src; u64 daddr = mi->daddr.addr; u64 op = data_src->mem_op; u64 lvl = data_src->mem_lvl; u64 snoop = data_src->mem_snoop; u64 lock = data_src->mem_lock; int err = 0; #define HITM_INC(__f) \ do { \ stats->__f++; \ stats->tot_hitm++; \ } while (0) #define P(a, b) PERF_MEM_##a##_##b stats->nr_entries++; if (lock & P(LOCK, LOCKED)) stats->locks++; if (op & P(OP, LOAD)) { /* load */ stats->load++; if (!daddr) { stats->ld_noadrs++; return -1; } if (lvl & P(LVL, HIT)) { if (lvl & P(LVL, UNC)) stats->ld_uncache++; if (lvl & P(LVL, IO)) stats->ld_io++; if (lvl & P(LVL, LFB)) stats->ld_fbhit++; if (lvl & P(LVL, L1 )) stats->ld_l1hit++; if (lvl & P(LVL, L2 )) stats->ld_l2hit++; if (lvl & P(LVL, L3 )) { if (snoop & P(SNOOP, HITM)) HITM_INC(lcl_hitm); else stats->ld_llchit++; } if (lvl & P(LVL, LOC_RAM)) { stats->lcl_dram++; if (snoop & P(SNOOP, HIT)) stats->ld_shared++; else stats->ld_excl++; } if ((lvl & P(LVL, REM_RAM1)) || (lvl & P(LVL, REM_RAM2))) { stats->rmt_dram++; if (snoop & P(SNOOP, HIT)) stats->ld_shared++; else stats->ld_excl++; } } if ((lvl & P(LVL, REM_CCE1)) || (lvl & P(LVL, REM_CCE2))) { if (snoop & P(SNOOP, HIT)) stats->rmt_hit++; else if (snoop & P(SNOOP, HITM)) HITM_INC(rmt_hitm); } if ((lvl & P(LVL, MISS))) stats->ld_miss++; } else if (op & P(OP, STORE)) { /* store */ stats->store++; if (!daddr) { stats->st_noadrs++; return -1; } if (lvl & P(LVL, HIT)) { if (lvl & P(LVL, UNC)) stats->st_uncache++; if (lvl & P(LVL, L1 )) stats->st_l1hit++; } if (lvl & P(LVL, MISS)) if (lvl & P(LVL, L1)) stats->st_l1miss++; } else { /* unparsable data_src? */ stats->noparse++; return -1; } if (!mi->daddr.map || !mi->iaddr.map) { stats->nomap++; return -1; } #undef P #undef HITM_INC return err; } void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add) { stats->nr_entries += add->nr_entries; stats->locks += add->locks; stats->store += add->store; stats->st_uncache += add->st_uncache; stats->st_noadrs += add->st_noadrs; stats->st_l1hit += add->st_l1hit; stats->st_l1miss += add->st_l1miss; stats->load += add->load; stats->ld_excl += add->ld_excl; stats->ld_shared += add->ld_shared; stats->ld_uncache += add->ld_uncache; stats->ld_io += add->ld_io; stats->ld_miss += add->ld_miss; stats->ld_noadrs += add->ld_noadrs; stats->ld_fbhit += add->ld_fbhit; stats->ld_l1hit += add->ld_l1hit; stats->ld_l2hit += add->ld_l2hit; stats->ld_llchit += add->ld_llchit; stats->lcl_hitm += add->lcl_hitm; stats->rmt_hitm += add->rmt_hitm; stats->tot_hitm += add->tot_hitm; stats->rmt_hit += add->rmt_hit; stats->lcl_dram += add->lcl_dram; stats->rmt_dram += add->rmt_dram; stats->nomap += add->nomap; stats->noparse += add->noparse; }