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Commit 3a4b8cc7 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by Ingo Molnar
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perf report: Sort output by symbol usage 



[acme@emilia ~]$ perf record find / > /dev/null 2>&1
[acme@emilia ~]$ perf stat perf report | head -20
 4.95          find [k] 0xffffffff81393d65 _spin_lock
 3.89          find [.] 0x000000000000af89 /usr/bin/find: <unknown>
 2.19          find [k] 0xffffffffa00518e0 ext3fs_dirhash
 1.87          find [k] 0xffffffff810a6cea __rcu_read_lock
 1.86          find [k] 0xffffffff811c7312 _atomic_dec_and_lock
 1.86          find [.] 0x00000000000782ab /lib64/libc-2.5.so: __GI_strlen
 1.85          find [k] 0xffffffff810fedfb __kmalloc
 1.62          find [.] 0x00000000000430ff /lib64/libc-2.5.so: vfprintf
 1.59          find [k] 0xffffffff810a6d6d __rcu_read_unlock
 1.55          find [k] 0xffffffff81119395 __d_lookup
 1.39          find [.] 0x0000000000071b40 /lib64/libc-2.5.so: _int_malloc
 1.30          find [k] 0xffffffffa031c4fc nfs_do_filldir
 1.21          find [k] 0xffffffff811876a5 avc_has_perm_noaudit
 1.15          find [k] 0xffffffff810fef62 kmem_cache_alloc
 1.07          find [k] 0xffffffff811d03fb copy_user_generic_string
 1.03          find [k] 0xffffffffa0043882 ext3_htree_store_dirent
 0.99          find [k] 0xffffffff81393ebb _spin_lock_bh
 0.98          find [k] 0xffffffffa03319a2 nfs3_decode_dirent
 0.97          find [k] 0xffffffff8100bf20 system_call
 0.92          find [k] 0xffffffff8139437e _spin_unlock

 Performance counter stats for 'perf':

     244.278972  task clock ticks     (msecs)
              8  context switches     (events)
              9  CPU migrations       (events)
           2104  pagefaults           (events)
       35329669  CPU cycles           (events)  (scaled from 75.40%)
       13740366  instructions         (events)  (scaled from 75.49%)
          59073  cache references     (events)  (scaled from 24.60%)
            196  cache misses         (events)  (scaled from 24.51%)

 Wall-clock time elapsed:   246.060717 msecs

[acme@emilia ~]$
[acme@emilia ~]$ grep "model name" /proc/cpuinfo | head -1
model name	: Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz
[acme@emilia ~]$ grep "model name" /proc/cpuinfo | wc -l
8
[acme@emilia ~]$

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090526191904.GH4424@ghostprotocols.net>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6142f9ec

Documentation/perf_counter/builtin-report.c

+99 −30
Original line number Diff line number Diff line
@@ -447,22 +447,29 @@ static size_t map__fprintf(struct map *self, FILE *fp) 
		       self->start, self->end, self->pgoff, self->dso->name);

}



struct thread;



static const char *thread__name(struct thread *self, char *bf, size_t size);



struct symhist {

	struct rb_node	 rb_node;

	struct dso	 *dso;

	struct symbol	 *sym;

	struct thread	 *thread;

	uint64_t	 ip;

	uint32_t	 count;

	char		 level;

};



static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,

				    struct dso *dso, char level)

				    struct thread *thread, struct dso *dso,

				    char level)

{

	struct symhist *self = malloc(sizeof(*self));



	if (self != NULL) {

		self->sym    = sym;

		self->thread = thread;

		self->ip     = ip;

		self->dso    = dso;

		self->level  = level;
@@ -482,17 +489,29 @@ static void symhist__inc(struct symhist *self) 
	++self->count;

}



static size_t symhist__fprintf(struct symhist *self, FILE *fp)

static size_t

symhist__fprintf(struct symhist *self, uint64_t total_samples, FILE *fp)

{

	size_t ret = fprintf(fp, "%#llx [%c] ", (unsigned long long)self->ip, self->level);

	char bf[32];

	size_t ret;



	if (total_samples)

		ret = fprintf(fp, "%5.2f", (self->count * 100.0) / total_samples);

	else

		ret = fprintf(fp, "%12d", self->count);



	ret += fprintf(fp, "%14s [%c] %#018llx ",

		       thread__name(self->thread, bf, sizeof(bf)),

		       self->level, (unsigned long long)self->ip);



	if (self->level != '.')

		ret += fprintf(fp, "%s", self->sym ? self->sym->name: "<unknown>");

		ret += fprintf(fp, "%s\n",

			       self->sym ? self->sym->name : "<unknown>");

	else

		ret += fprintf(fp, "%s: %s",

		ret += fprintf(fp, "%s: %s\n",

			       self->dso ? self->dso->name : "<unknown>",

			       self->sym ? self->sym->name : "<unknown>");

	return ret + fprintf(fp, ": %u\n", self->count);

	return ret;

}



struct thread {
@@ -503,6 +522,15 @@ struct thread { 
	char		 *comm;

};



static const char *thread__name(struct thread *self, char *bf, size_t size)

{

	if (self->comm)

		return self->comm;



	snprintf(bf, sizeof(bf), ":%u", self->pid);

	return bf;

}



static struct thread *thread__new(pid_t pid)

{

	struct thread *self = malloc(sizeof(*self));
@@ -542,7 +570,7 @@ static int thread__symbol_incnew(struct thread *self, struct symbol *sym, 
			p = &(*p)->rb_right;

	}



	sh = symhist__new(sym, ip, dso, level);

	sh = symhist__new(sym, ip, self, dso, level);

	if (sh == NULL)

		return -ENOMEM;

	rb_link_node(&sh->rb_node, parent, p);
@@ -574,7 +602,7 @@ static size_t thread__fprintf(struct thread *self, FILE *fp) 


	for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {

		struct symhist *pos = rb_entry(nd, struct symhist, rb_node);

		ret += symhist__fprintf(pos, fp);

		ret += symhist__fprintf(pos, 0, fp);

	}



	return ret;
@@ -628,7 +656,7 @@ static struct map *thread__find_map(struct thread *self, uint64_t ip) 
	return NULL;

}



static void threads__fprintf(FILE *fp)

void threads__fprintf(FILE *fp)

{

	struct rb_node *nd;

	for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
@@ -637,6 +665,61 @@ static void threads__fprintf(FILE *fp) 
	}

}



static struct rb_root global_symhists = RB_ROOT;



static void threads__insert_symhist(struct symhist *sh)

{

	struct rb_node **p = &global_symhists.rb_node;

	struct rb_node *parent = NULL;

	struct symhist *iter;



	while (*p != NULL) {

		parent = *p;

		iter = rb_entry(parent, struct symhist, rb_node);



		/* Reverse order */

		if (sh->count > iter->count)

			p = &(*p)->rb_left;

		else

			p = &(*p)->rb_right;

	}



	rb_link_node(&sh->rb_node, parent, p);

	rb_insert_color(&sh->rb_node, &global_symhists);

}



static void threads__sort_symhists(void)

{

	struct rb_node *nd;



	for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {

		struct thread *thread = rb_entry(nd, struct thread, rb_node);

		struct rb_node *next = rb_first(&thread->symhists);



		while (next) {

			struct symhist *n = rb_entry(next, struct symhist,

						     rb_node);

			next = rb_next(&n->rb_node);

			rb_erase(&n->rb_node, &thread->symhists);

			threads__insert_symhist(n);

		}



	}

}



static size_t threads__symhists_fprintf(uint64_t total_samples, FILE *fp)

{

	struct rb_node *nd;

	size_t ret = 0;



	for (nd = rb_first(&global_symhists); nd; nd = rb_next(nd)) {

		struct symhist *pos = rb_entry(nd, struct symhist, rb_node);

		ret += symhist__fprintf(pos, total_samples, fp);

	}



	return ret;

}



static int __cmd_report(void)

{

	unsigned long offset = 0;
@@ -826,23 +909,9 @@ static int __cmd_report(void) 
		return 0;

	}



	//dsos__fprintf(stdout);

	threads__fprintf(stdout);

#if 0

	std::map<std::string, int>::iterator hi = hist.begin();



	while (hi != hist.end()) {

		rev_hist.insert(std::pair<int, std::string>(hi->second, hi->first));

		hist.erase(hi++);

	}



	std::multimap<int, std::string>::const_iterator ri = rev_hist.begin();

	threads__sort_symhists();

	threads__symhists_fprintf(total, stdout);



	while (ri != rev_hist.end()) {

		printf(" %5.2f %s\n", (100.0 * ri->first)/total, ri->second.c_str());

		ri++;

	}

#endif

	return rc;

}