mirror of https://gitee.com/openkylin/linux.git
perf report: Add --sort <call> --call <$regex>
Implement sorting by callchain symbols, --sort <call>. It will create a new column which will show a match to --call $regex or "[unmatched]". Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
Ingo Molnar
parent
a3d06cc6aa
commit
6e7d6fdcbe
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@ -40,11 +40,13 @@ static int dump_trace = 0;
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static int verbose;
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static int full_paths;
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static int collapse_syscalls;
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static unsigned long page_size;
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static unsigned long mmap_window = 32;
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static char *call = "^sys_";
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static regex_t call_regex;
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struct ip_chain_event {
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__u16 nr;
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__u16 hv;
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@ -463,6 +465,7 @@ struct hist_entry {
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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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struct symbol *call;
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__u64 ip;
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char level;
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@ -483,6 +486,16 @@ struct sort_entry {
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size_t (*print)(FILE *fp, struct hist_entry *);
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};
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static int64_t cmp_null(void *l, void *r)
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{
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if (!l && !r)
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return 0;
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else if (!l)
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return -1;
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else
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return 1;
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}
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/* --sort pid */
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static int64_t
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@ -517,14 +530,8 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
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char *comm_l = left->thread->comm;
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char *comm_r = right->thread->comm;
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if (!comm_l || !comm_r) {
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if (!comm_l && !comm_r)
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return 0;
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else if (!comm_l)
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return -1;
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else
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return 1;
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}
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if (!comm_l || !comm_r)
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return cmp_null(comm_l, comm_r);
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return strcmp(comm_l, comm_r);
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}
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@ -550,14 +557,8 @@ sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
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struct dso *dso_l = left->dso;
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struct dso *dso_r = right->dso;
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if (!dso_l || !dso_r) {
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if (!dso_l && !dso_r)
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return 0;
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else if (!dso_l)
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return -1;
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else
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return 1;
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}
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if (!dso_l || !dso_r)
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return cmp_null(dso_l, dso_r);
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return strcmp(dso_l->name, dso_r->name);
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}
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@ -617,7 +618,38 @@ static struct sort_entry sort_sym = {
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.print = sort__sym_print,
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};
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/* --sort call */
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static int64_t
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sort__call_cmp(struct hist_entry *left, struct hist_entry *right)
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{
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struct symbol *sym_l = left->call;
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struct symbol *sym_r = right->call;
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if (!sym_l || !sym_r)
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return cmp_null(sym_l, sym_r);
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return strcmp(sym_l->name, sym_r->name);
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}
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static size_t
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sort__call_print(FILE *fp, struct hist_entry *self)
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{
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size_t ret = 0;
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ret += fprintf(fp, "%-20s", self->call ? self->call->name : "[unmatched]");
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return ret;
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}
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static struct sort_entry sort_call = {
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.header = "Callchain symbol ",
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.cmp = sort__call_cmp,
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.print = sort__call_print,
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};
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static int sort__need_collapse = 0;
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static int sort__has_call = 0;
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struct sort_dimension {
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char *name;
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@ -630,6 +662,7 @@ static struct sort_dimension sort_dimensions[] = {
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{ .name = "comm", .entry = &sort_comm, },
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{ .name = "dso", .entry = &sort_dso, },
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{ .name = "symbol", .entry = &sort_sym, },
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{ .name = "call", .entry = &sort_call, },
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};
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static LIST_HEAD(hist_entry__sort_list);
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@ -650,6 +683,18 @@ static int sort_dimension__add(char *tok)
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if (sd->entry->collapse)
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sort__need_collapse = 1;
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if (sd->entry == &sort_call) {
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int ret = regcomp(&call_regex, call, REG_EXTENDED);
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if (ret) {
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char err[BUFSIZ];
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regerror(ret, &call_regex, err, sizeof(err));
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fprintf(stderr, "Invalid regex: %s\n%s", call, err);
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exit(-1);
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}
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sort__has_call = 1;
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}
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list_add_tail(&sd->entry->list, &hist_entry__sort_list);
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sd->taken = 1;
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@ -730,13 +775,76 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, __u64 total_samples)
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return ret;
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}
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/*
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*
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*/
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static struct symbol *
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resolve_symbol(struct thread *thread, struct map **mapp,
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struct dso **dsop, __u64 *ipp)
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{
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struct dso *dso = dsop ? *dsop : NULL;
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struct map *map = mapp ? *mapp : NULL;
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uint64_t ip = *ipp;
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if (!thread)
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return NULL;
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if (dso)
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goto got_dso;
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if (map)
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goto got_map;
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map = thread__find_map(thread, ip);
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if (map != NULL) {
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if (mapp)
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*mapp = map;
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got_map:
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ip = map->map_ip(map, ip);
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*ipp = ip;
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dso = map->dso;
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} else {
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/*
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* If this is outside of all known maps,
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* and is a negative address, try to look it
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* up in the kernel dso, as it might be a
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* vsyscall (which executes in user-mode):
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*/
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if ((long long)ip < 0)
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dso = kernel_dso;
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}
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dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
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if (dsop)
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*dsop = dso;
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if (!dso)
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return NULL;
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got_dso:
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return dso->find_symbol(dso, ip);
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}
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static struct symbol *call__match(struct symbol *sym)
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{
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if (!sym)
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return NULL;
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if (sym->name && !regexec(&call_regex, sym->name, 0, NULL, 0))
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return sym;
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return NULL;
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}
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/*
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* collect histogram counts
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*/
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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, __u64 ip, char level, __u64 count)
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struct symbol *sym, __u64 ip, struct ip_chain_event *chain,
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char level, __u64 count)
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{
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struct rb_node **p = &hist.rb_node;
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struct rb_node *parent = NULL;
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@ -752,6 +860,33 @@ hist_entry__add(struct thread *thread, struct map *map, struct dso *dso,
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};
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int cmp;
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if (sort__has_call && chain) {
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int i, nr = chain->hv;
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struct symbol *sym;
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struct dso *dso;
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__u64 ip;
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for (i = 0; i < chain->kernel; i++) {
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ip = chain->ips[nr + i];
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dso = kernel_dso;
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sym = resolve_symbol(thread, NULL, &dso, &ip);
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entry.call = call__match(sym);
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if (entry.call)
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goto got_call;
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}
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nr += i;
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for (i = 0; i < chain->user; i++) {
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ip = chain->ips[nr + i];
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sym = resolve_symbol(thread, NULL, NULL, &ip);
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entry.call = call__match(sym);
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if (entry.call)
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goto got_call;
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}
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nr += i;
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}
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got_call:
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while (*p != NULL) {
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parent = *p;
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he = rb_entry(parent, struct hist_entry, rb_node);
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@ -955,7 +1090,7 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
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__u64 period = 1;
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struct map *map = NULL;
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void *more_data = event->ip.__more_data;
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struct ip_chain_event *chain;
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struct ip_chain_event *chain = NULL;
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if (event->header.type & PERF_SAMPLE_PERIOD) {
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period = *(__u64 *)more_data;
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@ -984,15 +1119,6 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
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for (i = 0; i < chain->nr; i++)
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dprintf("..... %2d: %016Lx\n", i, chain->ips[i]);
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}
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if (collapse_syscalls) {
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/*
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* Find the all-but-last kernel entry
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* amongst the call-chains - to get
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* to the level of system calls:
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*/
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if (chain->kernel >= 2)
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ip = chain->ips[chain->kernel-2];
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}
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}
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dprintf(" ... thread: %s:%d\n", thread->comm, thread->pid);
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@ -1016,22 +1142,6 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
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show = SHOW_USER;
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level = '.';
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map = thread__find_map(thread, ip);
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if (map != NULL) {
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ip = map->map_ip(map, ip);
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dso = map->dso;
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} else {
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/*
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* If this is outside of all known maps,
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* and is a negative address, try to look it
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* up in the kernel dso, as it might be a
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* vsyscall (which executes in user-mode):
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*/
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if ((long long)ip < 0)
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dso = kernel_dso;
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}
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dprintf(" ...... dso: %s\n", dso ? dso->name : "<not found>");
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} else {
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show = SHOW_HV;
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level = 'H';
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@ -1039,12 +1149,9 @@ process_overflow_event(event_t *event, unsigned long offset, unsigned long head)
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}
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if (show & show_mask) {
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struct symbol *sym = NULL;
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struct symbol *sym = resolve_symbol(thread, &map, &dso, &ip);
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if (dso)
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sym = dso->find_symbol(dso, ip);
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if (hist_entry__add(thread, map, dso, sym, ip, level, period)) {
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if (hist_entry__add(thread, map, dso, sym, ip, chain, level, period)) {
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fprintf(stderr,
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"problem incrementing symbol count, skipping event\n");
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return -1;
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@ -1353,8 +1460,8 @@ static const struct option options[] = {
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"sort by key(s): pid, comm, dso, symbol. Default: pid,symbol"),
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OPT_BOOLEAN('P', "full-paths", &full_paths,
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"Don't shorten the pathnames taking into account the cwd"),
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OPT_BOOLEAN('S', "syscalls", &collapse_syscalls,
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"show per syscall summary overhead, using call graph"),
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OPT_STRING('c', "call", &call, "regex",
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"regex to use for --sort call"),
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OPT_END()
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};
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