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Diffstat (limited to '')
-rw-r--r-- | tools/perf/util/branch.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/tools/perf/util/branch.h b/tools/perf/util/branch.h new file mode 100644 index 000000000..17b2ccc61 --- /dev/null +++ b/tools/perf/util/branch.h @@ -0,0 +1,88 @@ +#ifndef _PERF_BRANCH_H +#define _PERF_BRANCH_H 1 +/* + * The linux/stddef.h isn't need here, but is needed for __always_inline used + * in files included from uapi/linux/perf_event.h such as + * /usr/include/linux/swab.h and /usr/include/linux/byteorder/little_endian.h, + * detected in at least musl libc, used in Alpine Linux. -acme + */ +#include <stdio.h> +#include <stdint.h> +#include <linux/compiler.h> +#include <linux/stddef.h> +#include <linux/perf_event.h> +#include <linux/types.h> +#include "event.h" + +struct branch_flags { + union { + u64 value; + struct { + u64 mispred:1; + u64 predicted:1; + u64 in_tx:1; + u64 abort:1; + u64 cycles:16; + u64 type:4; + u64 reserved:40; + }; + }; +}; + +struct branch_info { + struct addr_map_symbol from; + struct addr_map_symbol to; + struct branch_flags flags; + char *srcline_from; + char *srcline_to; +}; + +struct branch_entry { + u64 from; + u64 to; + struct branch_flags flags; +}; + +struct branch_stack { + u64 nr; + u64 hw_idx; + struct branch_entry entries[]; +}; + +/* + * The hw_idx is only available when PERF_SAMPLE_BRANCH_HW_INDEX is applied. + * Otherwise, the output format of a sample with branch stack is + * struct branch_stack { + * u64 nr; + * struct branch_entry entries[0]; + * } + * Check whether the hw_idx is available, + * and return the corresponding pointer of entries[0]. + */ +static inline struct branch_entry *perf_sample__branch_entries(struct perf_sample *sample) +{ + u64 *entry = (u64 *)sample->branch_stack; + + entry++; + if (sample->no_hw_idx) + return (struct branch_entry *)entry; + return (struct branch_entry *)(++entry); +} + +struct branch_type_stat { + bool branch_to; + u64 counts[PERF_BR_MAX]; + u64 cond_fwd; + u64 cond_bwd; + u64 cross_4k; + u64 cross_2m; +}; + +void branch_type_count(struct branch_type_stat *st, struct branch_flags *flags, + u64 from, u64 to); + +const char *branch_type_name(int type); +void branch_type_stat_display(FILE *fp, struct branch_type_stat *st); +int branch_type_str(struct branch_type_stat *st, char *bf, int bfsize); + +#endif /* _PERF_BRANCH_H */ |