diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/branch.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/tools/perf/util/branch.c b/tools/perf/util/branch.c new file mode 100644 index 000000000..6d3823848 --- /dev/null +++ b/tools/perf/util/branch.c @@ -0,0 +1,214 @@ +#include "util/map_symbol.h" +#include "util/branch.h" +#include <linux/kernel.h> + +static bool cross_area(u64 addr1, u64 addr2, int size) +{ + u64 align1, align2; + + align1 = addr1 & ~(size - 1); + align2 = addr2 & ~(size - 1); + + return (align1 != align2) ? true : false; +} + +#define AREA_4K 4096 +#define AREA_2M (2 * 1024 * 1024) + +void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags, + u64 from, u64 to) +{ + if (flags->type == PERF_BR_UNKNOWN || from == 0) + return; + + if (flags->type == PERF_BR_EXTEND_ABI) + st->new_counts[flags->new_type]++; + else + st->counts[flags->type]++; + + if (flags->type == PERF_BR_COND) { + if (to > from) + st->cond_fwd++; + else + st->cond_bwd++; + } + + if (cross_area(from, to, AREA_2M)) + st->cross_2m++; + else if (cross_area(from, to, AREA_4K)) + st->cross_4k++; +} + +const char *branch_new_type_name(int new_type) +{ + const char *branch_new_names[PERF_BR_NEW_MAX] = { + "FAULT_ALGN", + "FAULT_DATA", + "FAULT_INST", +/* + * TODO: This switch should happen on 'session->header.env.arch' + * instead, because an arm64 platform perf recording could be + * opened for analysis on other platforms as well. + */ +#ifdef __aarch64__ + "ARM64_FIQ", + "ARM64_DEBUG_HALT", + "ARM64_DEBUG_EXIT", + "ARM64_DEBUG_INST", + "ARM64_DEBUG_DATA" +#else + "ARCH_1", + "ARCH_2", + "ARCH_3", + "ARCH_4", + "ARCH_5" +#endif + }; + + if (new_type >= 0 && new_type < PERF_BR_NEW_MAX) + return branch_new_names[new_type]; + + return NULL; +} + +const char *branch_type_name(int type) +{ + const char *branch_names[PERF_BR_MAX] = { + "N/A", + "COND", + "UNCOND", + "IND", + "CALL", + "IND_CALL", + "RET", + "SYSCALL", + "SYSRET", + "COND_CALL", + "COND_RET", + "ERET", + "IRQ", + "SERROR", + "NO_TX", + "", // Needed for PERF_BR_EXTEND_ABI that ends up triggering some compiler warnings about NULL deref + }; + + if (type >= 0 && type < PERF_BR_MAX) + return branch_names[type]; + + return NULL; +} + +const char *get_branch_type(struct branch_entry *e) +{ + if (e->flags.type == PERF_BR_UNKNOWN) + return ""; + + if (e->flags.type == PERF_BR_EXTEND_ABI) + return branch_new_type_name(e->flags.new_type); + + return branch_type_name(e->flags.type); +} + +void branch_type_stat_display(FILE *fp, struct branch_type_stat *st) +{ + u64 total = 0; + int i; + + for (i = 0; i < PERF_BR_MAX; i++) + total += st->counts[i]; + + if (total == 0) + return; + + fprintf(fp, "\n#"); + fprintf(fp, "\n# Branch Statistics:"); + fprintf(fp, "\n#"); + + if (st->cond_fwd > 0) { + fprintf(fp, "\n%8s: %5.1f%%", + "COND_FWD", + 100.0 * (double)st->cond_fwd / (double)total); + } + + if (st->cond_bwd > 0) { + fprintf(fp, "\n%8s: %5.1f%%", + "COND_BWD", + 100.0 * (double)st->cond_bwd / (double)total); + } + + if (st->cross_4k > 0) { + fprintf(fp, "\n%8s: %5.1f%%", + "CROSS_4K", + 100.0 * (double)st->cross_4k / (double)total); + } + + if (st->cross_2m > 0) { + fprintf(fp, "\n%8s: %5.1f%%", + "CROSS_2M", + 100.0 * (double)st->cross_2m / (double)total); + } + + for (i = 0; i < PERF_BR_MAX; i++) { + if (st->counts[i] > 0) + fprintf(fp, "\n%8s: %5.1f%%", + branch_type_name(i), + 100.0 * + (double)st->counts[i] / (double)total); + } + + for (i = 0; i < PERF_BR_NEW_MAX; i++) { + if (st->new_counts[i] > 0) + fprintf(fp, "\n%8s: %5.1f%%", + branch_new_type_name(i), + 100.0 * + (double)st->new_counts[i] / (double)total); + } + +} + +static int count_str_scnprintf(int idx, const char *str, char *bf, int size) +{ + return scnprintf(bf, size, "%s%s", (idx) ? " " : " (", str); +} + +int branch_type_str(struct branch_type_stat *st, char *bf, int size) +{ + int i, j = 0, printed = 0; + u64 total = 0; + + for (i = 0; i < PERF_BR_MAX; i++) + total += st->counts[i]; + + for (i = 0; i < PERF_BR_NEW_MAX; i++) + total += st->new_counts[i]; + + if (total == 0) + return 0; + + if (st->cond_fwd > 0) + printed += count_str_scnprintf(j++, "COND_FWD", bf + printed, size - printed); + + if (st->cond_bwd > 0) + printed += count_str_scnprintf(j++, "COND_BWD", bf + printed, size - printed); + + for (i = 0; i < PERF_BR_MAX; i++) { + if (i == PERF_BR_COND) + continue; + + if (st->counts[i] > 0) + printed += count_str_scnprintf(j++, branch_type_name(i), bf + printed, size - printed); + } + + for (i = 0; i < PERF_BR_NEW_MAX; i++) { + if (st->new_counts[i] > 0) + printed += count_str_scnprintf(j++, branch_new_type_name(i), bf + printed, size - printed); + } + + if (st->cross_4k > 0) + printed += count_str_scnprintf(j++, "CROSS_4K", bf + printed, size - printed); + + if (st->cross_2m > 0) + printed += count_str_scnprintf(j++, "CROSS_2M", bf + printed, size - printed); + + return printed; +} |