perf annotate: Use the sym_priv_size area for the histogram

We have this sym_priv_size mechanism for attaching private areas
to struct symbol entries but annotate wasn't using it, adding
private areas to struct symbol in addition to a ->priv pointer.

Scrap all that and use the sym_priv_size mechanism.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <1256055940-19511-1-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-10-20 14:25:40 -02:00 committed by Ingo Molnar
parent ed52ce2e3c
commit e42049926e
7 changed files with 132 additions and 83 deletions

View File

@ -37,12 +37,44 @@ static int print_line;
static unsigned long page_size;
static unsigned long mmap_window = 32;
struct sym_hist {
u64 sum;
u64 ip[0];
};
struct sym_ext {
struct rb_node node;
double percent;
char *path;
};
struct sym_priv {
struct sym_hist *hist;
struct sym_ext *ext;
};
static const char *sym_hist_filter;
static int symbol_filter(struct map *map, struct symbol *sym)
{
if (strcmp(sym->name, sym_hist_filter) == 0) {
struct sym_priv *priv = dso__sym_priv(map->dso, sym);
const int size = (sizeof(*priv->hist) +
(sym->end - sym->start) * sizeof(u64));
priv->hist = malloc(size);
if (priv->hist)
memset(priv->hist, 0, size);
return 0;
}
/*
* FIXME: We should really filter it out, as we don't want to go thru symbols
* we're not interested, and if a DSO ends up with no symbols, delete it too,
* but right now the kernel loading routines in symbol.c bail out if no symbols
* are found, fix it later.
*/
return 0;
}
/*
* collect histogram counts
@ -51,10 +83,16 @@ static void hist_hit(struct hist_entry *he, u64 ip)
{
unsigned int sym_size, offset;
struct symbol *sym = he->sym;
struct sym_priv *priv;
struct sym_hist *h;
he->count++;
if (!sym || !sym->hist)
if (!sym || !he->map)
return;
priv = dso__sym_priv(he->map->dso, sym);
if (!priv->hist)
return;
sym_size = sym->end - sym->start;
@ -67,15 +105,16 @@ static void hist_hit(struct hist_entry *he, u64 ip)
if (offset >= sym_size)
return;
sym->hist_sum++;
sym->hist[offset]++;
h = priv->hist;
h->sum++;
h->ip[offset]++;
if (verbose >= 3)
printf("%p %s: count++ [ip: %p, %08Lx] => %Ld\n",
(void *)(unsigned long)he->sym->start,
he->sym->name,
(void *)(unsigned long)ip, ip - he->sym->start,
sym->hist[offset]);
h->ip[offset]);
}
static int hist_entry__add(struct thread *thread, struct map *map,
@ -162,7 +201,9 @@ got_map:
static int
process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
{
struct map *map = map__new(&event->mmap, NULL, 0);
struct map *map = map__new(&event->mmap, NULL, 0,
sizeof(struct sym_priv), symbol_filter,
verbose);
struct thread *thread = threads__findnew(event->mmap.pid);
dump_printf("%p [%p]: PERF_RECORD_MMAP %d: [%p(%p) @ %p]: %s\n",
@ -314,17 +355,19 @@ static int parse_line(FILE *file, struct hist_entry *he, u64 len)
unsigned int hits = 0;
double percent = 0.0;
const char *color;
struct sym_ext *sym_ext = sym->priv;
struct sym_priv *priv = dso__sym_priv(he->map->dso, sym);
struct sym_ext *sym_ext = priv->ext;
struct sym_hist *h = priv->hist;
offset = line_ip - start;
if (offset < len)
hits = sym->hist[offset];
hits = h->ip[offset];
if (offset < len && sym_ext) {
path = sym_ext[offset].path;
percent = sym_ext[offset].percent;
} else if (sym->hist_sum)
percent = 100.0 * hits / sym->hist_sum;
} else if (h->sum)
percent = 100.0 * hits / h->sum;
color = get_percent_color(percent);
@ -377,9 +420,10 @@ static void insert_source_line(struct sym_ext *sym_ext)
rb_insert_color(&sym_ext->node, &root_sym_ext);
}
static void free_source_line(struct symbol *sym, int len)
static void free_source_line(struct hist_entry *he, int len)
{
struct sym_ext *sym_ext = sym->priv;
struct sym_priv *priv = dso__sym_priv(he->map->dso, he->sym);
struct sym_ext *sym_ext = priv->ext;
int i;
if (!sym_ext)
@ -389,7 +433,7 @@ static void free_source_line(struct symbol *sym, int len)
free(sym_ext[i].path);
free(sym_ext);
sym->priv = NULL;
priv->ext = NULL;
root_sym_ext = RB_ROOT;
}
@ -402,15 +446,16 @@ get_source_line(struct hist_entry *he, int len, const char *filename)
int i;
char cmd[PATH_MAX * 2];
struct sym_ext *sym_ext;
struct sym_priv *priv = dso__sym_priv(he->map->dso, sym);
struct sym_hist *h = priv->hist;
if (!sym->hist_sum)
if (!h->sum)
return;
sym->priv = calloc(len, sizeof(struct sym_ext));
if (!sym->priv)
sym_ext = priv->ext = calloc(len, sizeof(struct sym_ext));
if (!priv->ext)
return;
sym_ext = sym->priv;
start = he->map->unmap_ip(he->map, sym->start);
for (i = 0; i < len; i++) {
@ -419,7 +464,7 @@ get_source_line(struct hist_entry *he, int len, const char *filename)
u64 offset;
FILE *fp;
sym_ext[i].percent = 100.0 * sym->hist[i] / sym->hist_sum;
sym_ext[i].percent = 100.0 * h->ip[i] / h->sum;
if (sym_ext[i].percent <= 0.5)
continue;
@ -530,7 +575,7 @@ static void annotate_sym(struct hist_entry *he)
pclose(file);
if (print_line)
free_source_line(sym, len);
free_source_line(he, len);
}
static void find_annotations(void)
@ -540,19 +585,23 @@ static void find_annotations(void)
for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
struct sym_priv *priv;
if (he->sym && he->sym->hist) {
annotate_sym(he);
count++;
/*
* Since we have a hist_entry per IP for the same
* symbol, free he->sym->hist to signal we already
* processed this symbol.
*/
free(he->sym->hist);
he->sym->hist = NULL;
if (he->sym == NULL)
continue;
}
priv = dso__sym_priv(he->map->dso, he->sym);
if (priv->hist == NULL)
continue;
annotate_sym(he);
count++;
/*
* Since we have a hist_entry per IP for the same symbol, free
* he->sym->hist to signal we already processed this symbol.
*/
free(priv->hist);
priv->hist = NULL;
}
if (!count)
@ -593,7 +642,7 @@ static int __cmd_annotate(void)
exit(0);
}
if (load_kernel() < 0) {
if (load_kernel(sizeof(struct sym_priv), symbol_filter) < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
}

View File

@ -680,7 +680,7 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
static int
process_mmap_event(event_t *event, unsigned long offset, unsigned long head)
{
struct map *map = map__new(&event->mmap, cwd, cwdlen);
struct map *map = map__new(&event->mmap, cwd, cwdlen, 0, NULL, verbose);
struct thread *thread = threads__findnew(event->mmap.pid);
dump_printf("%p [%p]: PERF_RECORD_MMAP %d/%d: [%p(%p) @ %p]: %s\n",

View File

@ -130,7 +130,7 @@ int mmap_dispatch_perf_file(struct perf_header **pheader,
if (curr_handler->sample_type_check(sample_type) < 0)
exit(-1);
if (load_kernel() < 0) {
if (load_kernel(0, NULL) < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
}

View File

@ -101,7 +101,13 @@ static inline u64 identity__map_ip(struct map *map __used, u64 ip)
return ip;
}
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen);
struct symbol;
typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
unsigned int sym_priv_size, symbol_filter_t filter,
int v);
struct map *map__clone(struct map *self);
int map__overlap(struct map *l, struct map *r);
size_t map__fprintf(struct map *self, FILE *fp);

View File

@ -3,6 +3,7 @@
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "debug.h"
static inline int is_anon_memory(const char *filename)
{
@ -19,7 +20,9 @@ static int strcommon(const char *pathname, char *cwd, int cwdlen)
return n;
}
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen)
struct map *map__new(struct mmap_event *event, char *cwd, int cwdlen,
unsigned int sym_priv_size, symbol_filter_t filter,
int v)
{
struct map *self = malloc(sizeof(*self));
@ -27,6 +30,7 @@ static int strcommon(const char *pathname, char *cwd, int cwdlen)
const char *filename = event->filename;
char newfilename[PATH_MAX];
int anon;
bool new_dso;
if (cwd) {
int n = strcommon(filename, cwd, cwdlen);
@ -49,10 +53,23 @@ static int strcommon(const char *pathname, char *cwd, int cwdlen)
self->end = event->start + event->len;
self->pgoff = event->pgoff;
self->dso = dsos__findnew(filename);
self->dso = dsos__findnew(filename, sym_priv_size, &new_dso);
if (self->dso == NULL)
goto out_delete;
if (new_dso) {
int nr = dso__load(self->dso, self, filter, v);
if (nr < 0)
eprintf("Failed to open %s, continuing "
"without symbols\n",
self->dso->long_name);
else if (nr == 0)
eprintf("No symbols found in %s, maybe "
"install a debug package?\n",
self->dso->long_name);
}
if (self->dso == vdso || anon)
self->map_ip = self->unmap_ip = identity__map_ip;
else {

View File

@ -11,8 +11,6 @@
#include <elf.h>
#include <sys/utsname.h>
const char *sym_hist_filter;
enum dso_origin {
DSO__ORIG_KERNEL = 0,
DSO__ORIG_JAVA_JIT,
@ -86,22 +84,16 @@ static struct symbol *symbol__new(u64 start, u64 len, const char *name,
if (!self)
return NULL;
if (v > 2)
printf("new symbol: %016Lx [%08lx]: %s, hist: %p\n",
start, (unsigned long)len, name, self->hist);
self->hist = NULL;
self->hist_sum = 0;
if (sym_hist_filter && !strcmp(name, sym_hist_filter))
self->hist = calloc(sizeof(u64), len);
if (priv_size) {
memset(self, 0, priv_size);
self = ((void *)self) + priv_size;
}
self->start = start;
self->end = len ? start + len - 1 : start;
if (v > 2)
printf("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end);
memcpy(self->name, name, namelen);
return self;
@ -919,7 +911,8 @@ char dso__symtab_origin(const struct dso *self)
return origin[self->origin];
}
int dso__load(struct dso *self, struct map *map, symbol_filter_t filter, int v)
int dso__load(struct dso *self, struct map *map,
symbol_filter_t filter, int v)
{
int size = PATH_MAX;
char *name = malloc(size), *build_id = NULL;
@ -1335,33 +1328,21 @@ static struct dso *dsos__find(const char *name)
return NULL;
}
struct dso *dsos__findnew(const char *name)
struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size,
bool *is_new)
{
struct dso *dso = dsos__find(name);
int nr;
if (dso)
return dso;
dso = dso__new(name, 0);
if (!dso)
goto out_delete_dso;
nr = dso__load(dso, NULL, NULL, verbose);
if (nr < 0) {
eprintf("Failed to open: %s\n", name);
goto out_delete_dso;
}
if (!nr)
eprintf("No symbols found in: %s, maybe install a debug package?\n", name);
dsos__add(dso);
if (!dso) {
dso = dso__new(name, sym_priv_size);
if (dso) {
dsos__add(dso);
*is_new = true;
}
} else
*is_new = false;
return dso;
out_delete_dso:
dso__delete(dso);
return NULL;
}
void dsos__fprintf(FILE *fp)
@ -1372,9 +1353,10 @@ void dsos__fprintf(FILE *fp)
dso__fprintf(pos, fp);
}
int load_kernel(void)
int load_kernel(unsigned int sym_priv_size, symbol_filter_t filter)
{
if (dsos__load_kernel(vmlinux_name, 0, NULL, verbose, modules) <= 0)
if (dsos__load_kernel(vmlinux_name, sym_priv_size,
filter, verbose, modules) <= 0)
return -1;
vdso = dso__new("[vdso]", 0);

View File

@ -2,6 +2,7 @@
#define __PERF_SYMBOL 1
#include <linux/types.h>
#include <stdbool.h>
#include "types.h"
#include <linux/list.h>
#include <linux/rbtree.h>
@ -35,9 +36,6 @@ struct symbol {
struct rb_node rb_node;
u64 start;
u64 end;
u64 hist_sum;
u64 *hist;
void *priv;
char name[0];
};
@ -54,10 +52,6 @@ struct dso {
char name[0];
};
extern const char *sym_hist_filter;
typedef int (*symbol_filter_t)(struct map *map, struct symbol *sym);
struct dso *dso__new(const char *name, unsigned int sym_priv_size);
void dso__delete(struct dso *self);
@ -70,15 +64,16 @@ struct symbol *dso__find_symbol(struct dso *self, u64 ip);
int dsos__load_kernel(const char *vmlinux, unsigned int sym_priv_size,
symbol_filter_t filter, int verbose, int modules);
int dso__load(struct dso *self, struct map *map, symbol_filter_t filter,
int verbose);
struct dso *dsos__findnew(const char *name);
struct dso *dsos__findnew(const char *name, unsigned int sym_priv_size,
bool *is_new);
int dso__load(struct dso *self, struct map *map,
symbol_filter_t filter, int v);
void dsos__fprintf(FILE *fp);
size_t dso__fprintf(struct dso *self, FILE *fp);
char dso__symtab_origin(const struct dso *self);
int load_kernel(void);
int load_kernel(unsigned int sym_priv_size, symbol_filter_t filter);
void symbol__init(void);