mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 05:01:48 +00:00
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>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#ifndef _PROBE_FINDER_H
|
|
#define _PROBE_FINDER_H
|
|
|
|
#include <stdbool.h>
|
|
#include "util.h"
|
|
#include "probe-event.h"
|
|
|
|
#define MAX_PATH_LEN 256
|
|
#define MAX_PROBE_BUFFER 1024
|
|
#define MAX_PROBES 128
|
|
|
|
static inline int is_c_varname(const char *name)
|
|
{
|
|
/* TODO */
|
|
return isalpha(name[0]) || name[0] == '_';
|
|
}
|
|
|
|
#ifdef DWARF_SUPPORT
|
|
/* Find kprobe_trace_events specified by perf_probe_event from debuginfo */
|
|
extern int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
|
|
struct kprobe_trace_event **tevs);
|
|
|
|
/* Find a perf_probe_point from debuginfo */
|
|
extern int find_perf_probe_point(int fd, unsigned long addr,
|
|
struct perf_probe_point *ppt);
|
|
|
|
extern int find_line_range(int fd, struct line_range *lr);
|
|
|
|
#include <dwarf.h>
|
|
#include <libdw.h>
|
|
|
|
struct probe_finder {
|
|
struct perf_probe_event *pev; /* Target probe event */
|
|
struct kprobe_trace_event *tevs; /* Result trace events */
|
|
int ntevs; /* number of trace events */
|
|
|
|
/* For function searching */
|
|
int lno; /* Line number */
|
|
Dwarf_Addr addr; /* Address */
|
|
const char *fname; /* Real file name */
|
|
Dwarf_Die cu_die; /* Current CU */
|
|
struct list_head lcache; /* Line cache for lazy match */
|
|
|
|
/* For variable searching */
|
|
Dwarf_Op *fb_ops; /* Frame base attribute */
|
|
struct perf_probe_arg *pvar; /* Current target variable */
|
|
struct kprobe_trace_arg *tvar; /* Current result variable */
|
|
};
|
|
|
|
struct line_finder {
|
|
struct line_range *lr; /* Target line range */
|
|
|
|
const char *fname; /* File name */
|
|
int lno_s; /* Start line number */
|
|
int lno_e; /* End line number */
|
|
Dwarf_Die cu_die; /* Current CU */
|
|
int found;
|
|
};
|
|
|
|
#endif /* DWARF_SUPPORT */
|
|
|
|
#endif /*_PROBE_FINDER_H */
|