eed05fe70f
Using 'pahole --packable' I found some structs that could be reorganized to eliminate alignment holes, in some cases getting them to be cacheline multiples. [acme@doppio linux-2.6-tip]$ codiff perf.old ~/bin/perf builtin-annotate.c: struct perf_session | -8 struct perf_header | -8 2 structs changed builtin-diff.c: struct sample_data | -8 1 struct changed diff__process_sample_event | -8 1 function changed, 8 bytes removed, diff: -8 builtin-sched.c: struct sched_atom | -8 1 struct changed builtin-timechart.c: struct per_pid | -8 1 struct changed cmd_timechart | -16 1 function changed, 16 bytes removed, diff: -16 builtin-probe.c: struct perf_probe_point | -8 struct perf_probe_event | -8 2 structs changed opt_add_probe_event | -3 1 function changed, 3 bytes removed, diff: -3 util/probe-finder.c: struct probe_finder | -8 1 struct changed find_kprobe_trace_events | -16 1 function changed, 16 bytes removed, diff: -16 /home/acme/bin/perf: 4 functions changed, 43 bytes removed, diff: -43 [acme@doppio linux-2.6-tip]$ Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
#ifndef __PERF_HEADER_H
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#define __PERF_HEADER_H
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#include "../../../include/linux/perf_event.h"
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#include <sys/types.h>
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#include <stdbool.h>
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#include "types.h"
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#include "event.h"
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#include <linux/bitmap.h>
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struct perf_header_attr {
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struct perf_event_attr attr;
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int ids, size;
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u64 *id;
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off_t id_offset;
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};
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enum {
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HEADER_TRACE_INFO = 1,
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HEADER_BUILD_ID,
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HEADER_LAST_FEATURE,
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};
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#define HEADER_FEAT_BITS 256
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struct perf_file_section {
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u64 offset;
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u64 size;
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};
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struct perf_file_header {
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u64 magic;
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u64 size;
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u64 attr_size;
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struct perf_file_section attrs;
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struct perf_file_section data;
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struct perf_file_section event_types;
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DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
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};
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struct perf_header;
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int perf_file_header__read(struct perf_file_header *self,
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struct perf_header *ph, int fd);
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struct perf_header {
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int frozen;
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int attrs, size;
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bool needs_swap;
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struct perf_header_attr **attr;
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s64 attr_offset;
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u64 data_offset;
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u64 data_size;
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u64 event_offset;
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u64 event_size;
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DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
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};
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int perf_header__init(struct perf_header *self);
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void perf_header__exit(struct perf_header *self);
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int perf_header__read(struct perf_header *self, int fd);
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int perf_header__write(struct perf_header *self, int fd, bool at_exit);
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int perf_header__add_attr(struct perf_header *self,
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struct perf_header_attr *attr);
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int perf_header__push_event(u64 id, const char *name);
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char *perf_header__find_event(u64 id);
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struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr);
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void perf_header_attr__delete(struct perf_header_attr *self);
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int perf_header_attr__add_id(struct perf_header_attr *self, u64 id);
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u64 perf_header__sample_type(struct perf_header *header);
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struct perf_event_attr *
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perf_header__find_attr(u64 id, struct perf_header *header);
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void perf_header__set_feat(struct perf_header *self, int feat);
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bool perf_header__has_feat(const struct perf_header *self, int feat);
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int perf_header__process_sections(struct perf_header *self, int fd,
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int (*process)(struct perf_file_section *self,
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struct perf_header *ph,
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int feat, int fd));
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int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
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const char *name, bool is_kallsyms);
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int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir);
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#endif /* __PERF_HEADER_H */
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