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The annotated_data_type__update_samples() to get histogram for data type access. It'll be called by perf annotate to show which fields in the data type are accessed frequently. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: linux-toolchains@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Link: https://lore.kernel.org/r/20231213001323.718046-12-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PERF_ANNOTATE_DATA_H
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#define _PERF_ANNOTATE_DATA_H
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#include <errno.h>
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#include <linux/compiler.h>
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#include <linux/rbtree.h>
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#include <linux/types.h>
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struct evsel;
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struct map_symbol;
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/**
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* struct annotated_member - Type of member field
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* @node: List entry in the parent list
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* @children: List head for child nodes
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* @type_name: Name of the member type
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* @var_name: Name of the member variable
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* @offset: Offset from the outer data type
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* @size: Size of the member field
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*
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* This represents a member type in a data type.
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*/
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struct annotated_member {
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struct list_head node;
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struct list_head children;
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char *type_name;
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char *var_name;
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int offset;
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int size;
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};
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/**
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* struct type_hist_entry - Histogram entry per offset
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* @nr_samples: Number of samples
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* @period: Count of event
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*/
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struct type_hist_entry {
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int nr_samples;
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u64 period;
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};
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/**
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* struct type_hist - Type histogram for each event
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* @nr_samples: Total number of samples in this data type
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* @period: Total count of the event in this data type
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* @offset: Array of histogram entry
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*/
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struct type_hist {
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u64 nr_samples;
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u64 period;
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struct type_hist_entry addr[];
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};
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/**
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* struct annotated_data_type - Data type to profile
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* @node: RB-tree node for dso->type_tree
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* @self: Actual type information
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* @nr_histogram: Number of histogram entries
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* @histograms: An array of pointers to histograms
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*
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* This represents a data type accessed by samples in the profile data.
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*/
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struct annotated_data_type {
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struct rb_node node;
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struct annotated_member self;
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int nr_histograms;
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struct type_hist **histograms;
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};
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extern struct annotated_data_type unknown_type;
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#ifdef HAVE_DWARF_SUPPORT
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/* Returns data type at the location (ip, reg, offset) */
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struct annotated_data_type *find_data_type(struct map_symbol *ms, u64 ip,
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int reg, int offset);
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/* Update type access histogram at the given offset */
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int annotated_data_type__update_samples(struct annotated_data_type *adt,
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struct evsel *evsel, int offset,
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int nr_samples, u64 period);
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/* Release all data type information in the tree */
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void annotated_data_type__tree_delete(struct rb_root *root);
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#else /* HAVE_DWARF_SUPPORT */
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static inline struct annotated_data_type *
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find_data_type(struct map_symbol *ms __maybe_unused, u64 ip __maybe_unused,
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int reg __maybe_unused, int offset __maybe_unused)
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{
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return NULL;
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}
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static inline int
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annotated_data_type__update_samples(struct annotated_data_type *adt __maybe_unused,
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struct evsel *evsel __maybe_unused,
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int offset __maybe_unused,
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int nr_samples __maybe_unused,
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u64 period __maybe_unused)
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{
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return -1;
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}
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static inline void annotated_data_type__tree_delete(struct rb_root *root __maybe_unused)
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{
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}
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#endif /* HAVE_DWARF_SUPPORT */
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#endif /* _PERF_ANNOTATE_DATA_H */
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