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perf_counter: tools: report: Rework histogram code
In preparation for configurable sorting, rework the histgram code a bit. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <20090527182100.796410098@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
Ingo Molnar
parent
450aaa2b2a
commit
e7fb08b1d0
@ -597,71 +597,9 @@ struct thread;
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static const char *thread__name(struct thread *self, char *bf, size_t size);
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struct symhist {
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struct rb_node rb_node;
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struct dso *dso;
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struct symbol *sym;
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struct thread *thread;
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uint64_t ip;
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uint32_t count;
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char level;
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};
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static struct symhist *symhist__new(struct symbol *sym, uint64_t ip,
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struct thread *thread, struct dso *dso,
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char level)
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{
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struct symhist *self = malloc(sizeof(*self));
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if (self != NULL) {
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self->sym = sym;
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self->thread = thread;
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self->ip = ip;
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self->dso = dso;
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self->level = level;
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self->count = 1;
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}
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return self;
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}
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static void symhist__inc(struct symhist *self)
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{
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++self->count;
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}
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static size_t
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symhist__fprintf(struct symhist *self, uint64_t total_samples, FILE *fp)
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{
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char bf[32];
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size_t ret;
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if (total_samples)
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ret = fprintf(fp, "%5.2f%% ", (self->count * 100.0) / total_samples);
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else
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ret = fprintf(fp, "%12d ", self->count);
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ret += fprintf(fp, "%14s [%c] ",
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thread__name(self->thread, bf, sizeof(bf)),
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self->level);
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if (verbose)
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ret += fprintf(fp, "%#018llx ", (unsigned long long)self->ip);
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if (self->level != '.')
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ret += fprintf(fp, "%s\n",
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self->sym ? self->sym->name : "<unknown>");
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else
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ret += fprintf(fp, "%s: %s\n",
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self->dso ? self->dso->name : "<unknown>",
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self->sym ? self->sym->name : "<unknown>");
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return ret;
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}
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struct thread {
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struct rb_node rb_node;
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struct list_head maps;
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struct rb_root symhists;
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pid_t pid;
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char *comm;
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};
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@ -683,67 +621,17 @@ static struct thread *thread__new(pid_t pid)
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self->pid = pid;
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self->comm = NULL;
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INIT_LIST_HEAD(&self->maps);
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self->symhists = RB_ROOT;
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}
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return self;
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}
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static int thread__symbol_incnew(struct thread *self, struct symbol *sym,
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uint64_t ip, struct dso *dso, char level)
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{
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struct rb_node **p = &self->symhists.rb_node;
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struct rb_node *parent = NULL;
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struct symhist *sh;
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while (*p != NULL) {
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uint64_t start;
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parent = *p;
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sh = rb_entry(parent, struct symhist, rb_node);
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if (sh->sym == sym || ip == sh->ip) {
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symhist__inc(sh);
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return 0;
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}
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/* Handle unresolved symbols too */
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start = !sh->sym ? sh->ip : sh->sym->start;
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if (ip < start)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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sh = symhist__new(sym, ip, self, dso, level);
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if (sh == NULL)
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return -ENOMEM;
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rb_link_node(&sh->rb_node, parent, p);
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rb_insert_color(&sh->rb_node, &self->symhists);
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return 0;
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}
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static int thread__set_comm(struct thread *self, const char *comm)
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{
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self->comm = strdup(comm);
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return self->comm ? 0 : -ENOMEM;
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}
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static size_t thread__fprintf(struct thread *self, FILE *fp)
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{
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int ret = fprintf(fp, "thread: %d %s\n", self->pid, self->comm);
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struct rb_node *nd;
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for (nd = rb_first(&self->symhists); nd; nd = rb_next(nd)) {
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struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
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ret += symhist__fprintf(pos, 0, fp);
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}
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return ret;
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}
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static struct rb_root threads;
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static struct thread *threads__findnew(pid_t pid)
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@ -792,70 +680,172 @@ static struct map *thread__find_map(struct thread *self, uint64_t ip)
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return NULL;
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}
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static void threads__fprintf(FILE *fp)
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/*
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* histogram, sorted on item, collects counts
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*/
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static struct rb_root hist;
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struct hist_entry {
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struct rb_node rb_node;
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struct thread *thread;
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struct map *map;
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struct dso *dso;
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struct symbol *sym;
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uint64_t ip;
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char level;
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uint32_t count;
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};
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static int64_t
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hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
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{
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struct rb_node *nd;
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for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
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struct thread *pos = rb_entry(nd, struct thread, rb_node);
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thread__fprintf(pos, fp);
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}
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uint64_t ip_l, ip_r;
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int cmp = right->thread->pid - left->thread->pid;
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if (cmp)
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return cmp;
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if (left->sym == right->sym)
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return 0;
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ip_l = left->sym ? left->sym->start : left->ip;
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ip_r = right->sym ? right->sym->start : right->ip;
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return (int64_t)(ip_r - ip_l);
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}
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static struct rb_root global_symhists;
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static void threads__insert_symhist(struct symhist *sh)
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static int
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hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
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struct symbol *sym, uint64_t ip, char level)
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{
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struct rb_node **p = &global_symhists.rb_node;
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struct rb_node **p = &hist.rb_node;
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struct rb_node *parent = NULL;
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struct symhist *iter;
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struct hist_entry *he;
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struct hist_entry entry = {
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.thread = thread,
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.map = map,
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.dso = dso,
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.sym = sym,
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.ip = ip,
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.level = level,
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.count = 1,
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};
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int cmp;
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while (*p != NULL) {
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parent = *p;
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iter = rb_entry(parent, struct symhist, rb_node);
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he = rb_entry(parent, struct hist_entry, rb_node);
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/* Reverse order */
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if (sh->count > iter->count)
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cmp = hist_entry__cmp(&entry, he);
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if (!cmp) {
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he->count++;
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return 0;
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}
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if (cmp < 0)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&sh->rb_node, parent, p);
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rb_insert_color(&sh->rb_node, &global_symhists);
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he = malloc(sizeof(*he));
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if (!he)
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return -ENOMEM;
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*he = entry;
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rb_link_node(&he->rb_node, parent, p);
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rb_insert_color(&he->rb_node, &hist);
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return 0;
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}
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static void threads__sort_symhists(void)
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static size_t
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hist_entry__fprintf(FILE *fp, struct hist_entry *self, uint64_t total_samples)
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{
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struct rb_node *nd;
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char bf[32];
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size_t ret;
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for (nd = rb_first(&threads); nd; nd = rb_next(nd)) {
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struct thread *thread = rb_entry(nd, struct thread, rb_node);
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struct rb_node *next = rb_first(&thread->symhists);
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if (total_samples) {
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ret = fprintf(fp, "%5.2f%% ",
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(self->count * 100.0) / total_samples);
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} else
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ret = fprintf(fp, "%12d ", self->count);
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while (next) {
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struct symhist *n = rb_entry(next, struct symhist,
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rb_node);
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next = rb_next(&n->rb_node);
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rb_erase(&n->rb_node, &thread->symhists);
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threads__insert_symhist(n);
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}
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ret += fprintf(fp, "%14s [%c] ",
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thread__name(self->thread, bf, sizeof(bf)),
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self->level);
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if (verbose)
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ret += fprintf(fp, "%#018llx ", (unsigned long long)self->ip);
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if (self->level != '.')
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ret += fprintf(fp, "%s\n",
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self->sym ? self->sym->name : "<unknown>");
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else
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ret += fprintf(fp, "%s: %s\n",
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self->dso ? self->dso->name : "<unknown>",
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self->sym ? self->sym->name : "<unknown>");
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return ret;
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}
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/*
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* reverse the map, sort on count.
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*/
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static struct rb_root output_hists;
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static void output__insert_entry(struct hist_entry *he)
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{
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struct rb_node **p = &output_hists.rb_node;
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struct rb_node *parent = NULL;
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struct hist_entry *iter;
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while (*p != NULL) {
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parent = *p;
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iter = rb_entry(parent, struct hist_entry, rb_node);
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if (he->count > iter->count)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&he->rb_node, parent, p);
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rb_insert_color(&he->rb_node, &output_hists);
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}
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static void output__resort(void)
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{
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struct rb_node *next = rb_first(&hist);
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struct hist_entry *n;
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while (next) {
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n = rb_entry(next, struct hist_entry, rb_node);
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next = rb_next(&n->rb_node);
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rb_erase(&n->rb_node, &hist);
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output__insert_entry(n);
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}
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}
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static size_t threads__symhists_fprintf(uint64_t total_samples, FILE *fp)
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static size_t output__fprintf(FILE *fp, uint64_t total_samples)
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{
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struct hist_entry *pos;
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struct rb_node *nd;
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size_t ret = 0;
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for (nd = rb_first(&global_symhists); nd; nd = rb_next(nd)) {
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struct symhist *pos = rb_entry(nd, struct symhist, rb_node);
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ret += symhist__fprintf(pos, total_samples, fp);
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for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
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pos = rb_entry(nd, struct hist_entry, rb_node);
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ret += hist_entry__fprintf(fp, pos, total_samples);
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}
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return ret;
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}
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static int __cmd_report(void)
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{
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unsigned long offset = 0;
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@ -926,6 +916,7 @@ more:
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struct dso *dso = NULL;
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struct thread *thread = threads__findnew(event->ip.pid);
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uint64_t ip = event->ip.ip;
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struct map *map = NULL;
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if (dump_trace) {
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fprintf(stderr, "%p [%p]: PERF_EVENT (IP, %d): %d: %p\n",
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@ -945,9 +936,10 @@ more:
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if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
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show = SHOW_KERNEL;
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level = 'k';
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dso = kernel_dso;
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} else if (event->header.misc & PERF_EVENT_MISC_USER) {
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struct map *map;
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show = SHOW_USER;
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level = '.';
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@ -957,6 +949,7 @@ more:
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dso = map->dso;
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ip -= map->start + map->pgoff;
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}
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} else {
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show = SHOW_HV;
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level = 'H';
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@ -965,8 +958,9 @@ more:
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if (show & show_mask) {
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struct symbol *sym = dso__find_symbol(dso, ip);
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if (thread__symbol_incnew(thread, sym, ip, dso, level)) {
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fprintf(stderr, "problem incrementing symbol count, bailing out\n");
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if (hist_entry__add(thread, map, dso, sym, ip, level)) {
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fprintf(stderr,
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"problem incrementing symbol count, bailing out\n");
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goto done;
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}
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}
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@ -1050,13 +1044,11 @@ done:
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return 0;
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}
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if (verbose >= 2) {
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if (verbose >= 2)
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dsos__fprintf(stdout);
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threads__fprintf(stdout);
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}
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threads__sort_symhists();
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threads__symhists_fprintf(total, stdout);
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output__resort();
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output__fprintf(stdout, total);
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return rc;
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}
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