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linux-davinci
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
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Inline Side-by-side
Showing with 99 additions and 30 deletions
Documentation/perf_counter/builtin-report.c
View file @ 3a4b8cc7
......@@ -447,26 +447,33 @@ 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->ip = ip;
self->dso = dso;
self->level = level;
self->count = 1;
self->sym = sym;
self->thread = thread;
self->ip = ip;
self->dso = dso;
self->level = level;
self->count = 1;
}
return self;
......@@ -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 @@ done:
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;
}
......
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