230 lines · c
1#include "util/map_symbol.h"2#include "util/branch.h"3#include <linux/kernel.h>4 5static bool cross_area(u64 addr1, u64 addr2, int size)6{7 u64 align1, align2;8 9 align1 = addr1 & ~(size - 1);10 align2 = addr2 & ~(size - 1);11 12 return (align1 != align2) ? true : false;13}14 15#define AREA_4K 409616#define AREA_2M (2 * 1024 * 1024)17 18void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags,19 u64 from, u64 to)20{21 if (flags->type == PERF_BR_UNKNOWN || from == 0)22 return;23 24 if (flags->type == PERF_BR_EXTEND_ABI)25 st->new_counts[flags->new_type]++;26 else27 st->counts[flags->type]++;28 29 if (flags->type == PERF_BR_COND) {30 if (to > from)31 st->cond_fwd++;32 else33 st->cond_bwd++;34 }35 36 if (cross_area(from, to, AREA_2M))37 st->cross_2m++;38 else if (cross_area(from, to, AREA_4K))39 st->cross_4k++;40}41 42const char *branch_new_type_name(int new_type)43{44 const char *branch_new_names[PERF_BR_NEW_MAX] = {45 "FAULT_ALGN",46 "FAULT_DATA",47 "FAULT_INST",48/*49 * TODO: This switch should happen on 'session->header.env.arch'50 * instead, because an arm64 platform perf recording could be51 * opened for analysis on other platforms as well.52 */53#ifdef __aarch64__54 "ARM64_FIQ",55 "ARM64_DEBUG_HALT",56 "ARM64_DEBUG_EXIT",57 "ARM64_DEBUG_INST",58 "ARM64_DEBUG_DATA"59#else60 "ARCH_1",61 "ARCH_2",62 "ARCH_3",63 "ARCH_4",64 "ARCH_5"65#endif66 };67 68 if (new_type >= 0 && new_type < PERF_BR_NEW_MAX)69 return branch_new_names[new_type];70 71 return NULL;72}73 74const char *branch_type_name(int type)75{76 const char *branch_names[PERF_BR_MAX] = {77 "N/A",78 "COND",79 "UNCOND",80 "IND",81 "CALL",82 "IND_CALL",83 "RET",84 "SYSCALL",85 "SYSRET",86 "COND_CALL",87 "COND_RET",88 "ERET",89 "IRQ",90 "SERROR",91 "NO_TX",92 "", // Needed for PERF_BR_EXTEND_ABI that ends up triggering some compiler warnings about NULL deref93 };94 95 if (type >= 0 && type < PERF_BR_MAX)96 return branch_names[type];97 98 return NULL;99}100 101const char *get_branch_type(struct branch_entry *e)102{103 if (e->flags.type == PERF_BR_UNKNOWN)104 return "";105 106 if (e->flags.type == PERF_BR_EXTEND_ABI)107 return branch_new_type_name(e->flags.new_type);108 109 return branch_type_name(e->flags.type);110}111 112void branch_type_stat_display(FILE *fp, const struct branch_type_stat *st)113{114 u64 total = 0;115 int i;116 117 for (i = 0; i < PERF_BR_MAX; i++)118 total += st->counts[i];119 120 if (total == 0)121 return;122 123 fprintf(fp, "\n#");124 fprintf(fp, "\n# Branch Statistics:");125 fprintf(fp, "\n#");126 127 if (st->cond_fwd > 0) {128 fprintf(fp, "\n%8s: %5.1f%%",129 "COND_FWD",130 100.0 * (double)st->cond_fwd / (double)total);131 }132 133 if (st->cond_bwd > 0) {134 fprintf(fp, "\n%8s: %5.1f%%",135 "COND_BWD",136 100.0 * (double)st->cond_bwd / (double)total);137 }138 139 if (st->cross_4k > 0) {140 fprintf(fp, "\n%8s: %5.1f%%",141 "CROSS_4K",142 100.0 * (double)st->cross_4k / (double)total);143 }144 145 if (st->cross_2m > 0) {146 fprintf(fp, "\n%8s: %5.1f%%",147 "CROSS_2M",148 100.0 * (double)st->cross_2m / (double)total);149 }150 151 for (i = 0; i < PERF_BR_MAX; i++) {152 if (st->counts[i] > 0)153 fprintf(fp, "\n%8s: %5.1f%%",154 branch_type_name(i),155 100.0 *156 (double)st->counts[i] / (double)total);157 }158 159 for (i = 0; i < PERF_BR_NEW_MAX; i++) {160 if (st->new_counts[i] > 0)161 fprintf(fp, "\n%8s: %5.1f%%",162 branch_new_type_name(i),163 100.0 *164 (double)st->new_counts[i] / (double)total);165 }166 167}168 169static int count_str_scnprintf(int idx, const char *str, char *bf, int size)170{171 return scnprintf(bf, size, "%s%s", (idx) ? " " : " (", str);172}173 174int branch_type_str(const struct branch_type_stat *st, char *bf, int size)175{176 int i, j = 0, printed = 0;177 u64 total = 0;178 179 for (i = 0; i < PERF_BR_MAX; i++)180 total += st->counts[i];181 182 for (i = 0; i < PERF_BR_NEW_MAX; i++)183 total += st->new_counts[i];184 185 if (total == 0)186 return 0;187 188 if (st->cond_fwd > 0)189 printed += count_str_scnprintf(j++, "COND_FWD", bf + printed, size - printed);190 191 if (st->cond_bwd > 0)192 printed += count_str_scnprintf(j++, "COND_BWD", bf + printed, size - printed);193 194 for (i = 0; i < PERF_BR_MAX; i++) {195 if (i == PERF_BR_COND)196 continue;197 198 if (st->counts[i] > 0)199 printed += count_str_scnprintf(j++, branch_type_name(i), bf + printed, size - printed);200 }201 202 for (i = 0; i < PERF_BR_NEW_MAX; i++) {203 if (st->new_counts[i] > 0)204 printed += count_str_scnprintf(j++, branch_new_type_name(i), bf + printed, size - printed);205 }206 207 if (st->cross_4k > 0)208 printed += count_str_scnprintf(j++, "CROSS_4K", bf + printed, size - printed);209 210 if (st->cross_2m > 0)211 printed += count_str_scnprintf(j++, "CROSS_2M", bf + printed, size - printed);212 213 return printed;214}215 216const char *branch_spec_desc(int spec)217{218 const char *branch_spec_outcomes[PERF_BR_SPEC_MAX] = {219 "N/A",220 "SPEC_WRONG_PATH",221 "NON_SPEC_CORRECT_PATH",222 "SPEC_CORRECT_PATH",223 };224 225 if (spec >= 0 && spec < PERF_BR_SPEC_MAX)226 return branch_spec_outcomes[spec];227 228 return NULL;229}230