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>
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
#ifndef _PROBE_EVENT_H
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#define _PROBE_EVENT_H
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#include <stdbool.h>
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#include "strlist.h"
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extern bool probe_event_dry_run;
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/* kprobe-tracer tracing point */
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struct kprobe_trace_point {
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char *symbol; /* Base symbol */
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unsigned long offset; /* Offset from symbol */
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bool retprobe; /* Return probe flag */
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};
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/* kprobe-tracer tracing argument referencing offset */
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struct kprobe_trace_arg_ref {
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struct kprobe_trace_arg_ref *next; /* Next reference */
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long offset; /* Offset value */
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};
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/* kprobe-tracer tracing argument */
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struct kprobe_trace_arg {
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char *name; /* Argument name */
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char *value; /* Base value */
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struct kprobe_trace_arg_ref *ref; /* Referencing offset */
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};
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/* kprobe-tracer tracing event (point + arg) */
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struct kprobe_trace_event {
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char *event; /* Event name */
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char *group; /* Group name */
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struct kprobe_trace_point point; /* Trace point */
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int nargs; /* Number of args */
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struct kprobe_trace_arg *args; /* Arguments */
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};
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/* Perf probe probing point */
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struct perf_probe_point {
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char *file; /* File path */
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char *function; /* Function name */
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int line; /* Line number */
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bool retprobe; /* Return probe flag */
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char *lazy_line; /* Lazy matching pattern */
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unsigned long offset; /* Offset from function entry */
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};
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/* Perf probe probing argument field chain */
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struct perf_probe_arg_field {
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struct perf_probe_arg_field *next; /* Next field */
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char *name; /* Name of the field */
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bool ref; /* Referencing flag */
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};
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/* Perf probe probing argument */
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struct perf_probe_arg {
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char *name; /* Argument name */
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struct perf_probe_arg_field *field; /* Structure fields */
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};
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/* Perf probe probing event (point + arg) */
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struct perf_probe_event {
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char *event; /* Event name */
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char *group; /* Group name */
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struct perf_probe_point point; /* Probe point */
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int nargs; /* Number of arguments */
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struct perf_probe_arg *args; /* Arguments */
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};
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/* Line number container */
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struct line_node {
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struct list_head list;
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unsigned int line;
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};
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/* Line range */
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struct line_range {
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char *file; /* File name */
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char *function; /* Function name */
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unsigned int start; /* Start line number */
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unsigned int end; /* End line number */
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int offset; /* Start line offset */
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char *path; /* Real path name */
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struct list_head line_list; /* Visible lines */
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};
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/* Command string to events */
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extern void parse_perf_probe_command(const char *cmd,
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struct perf_probe_event *pev);
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extern void parse_kprobe_trace_command(const char *cmd,
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struct kprobe_trace_event *tev);
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/* Events to command string */
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extern char *synthesize_perf_probe_command(struct perf_probe_event *pev);
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extern char *synthesize_kprobe_trace_command(struct kprobe_trace_event *tev);
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extern int synthesize_perf_probe_arg(struct perf_probe_arg *pa, char *buf,
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size_t len);
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/* Check the perf_probe_event needs debuginfo */
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extern bool perf_probe_event_need_dwarf(struct perf_probe_event *pev);
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/* Convert from kprobe_trace_event to perf_probe_event */
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extern void convert_to_perf_probe_event(struct kprobe_trace_event *tev,
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struct perf_probe_event *pev);
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/* Release event contents */
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extern void clear_perf_probe_event(struct perf_probe_event *pev);
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extern void clear_kprobe_trace_event(struct kprobe_trace_event *tev);
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/* Command string to line-range */
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extern void parse_line_range_desc(const char *cmd, struct line_range *lr);
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extern void add_perf_probe_events(struct perf_probe_event *pevs, int ntevs,
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bool force_add);
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extern void del_perf_probe_events(struct strlist *dellist);
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extern void show_perf_probe_events(void);
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extern void show_line_range(struct line_range *lr);
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/* Maximum index number of event-name postfix */
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#define MAX_EVENT_INDEX 1024
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#endif /*_PROBE_EVENT_H */
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