Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 21:51:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

perf annotate: Add --insn-stat option for debugging

Browse Source 
This is for a debugging purpose.  It'd be useful to see per-instrucion
level success/failure stats.

  $ perf annotate --data-type --insn-stat
  Annotate Instruction stats
  total 264, ok 143 (54.2%), bad 121 (45.8%)

    Name      :  Good   Bad
  -----------------------------------------------------------
    movq      :    45    31
    movl      :    22    11
    popq      :     0    19
    cmpl      :    16     3
    addq      :     8     7
    cmpq      :    11     3
    cmpxchgl  :     3     7
    cmpxchgq  :     8     0
    incl      :     3     3
    movzbl    :     4     2
    incq      :     4     2
    decl      :     6     0
    ...

Committer notes:

So these are about being able to find the type for accesses from these
instructions, we should improve the naming, but it is for debugging, we
can improve this later:

  @@ -3726,6 +3759,10 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
                          continue;

                  mem_type = find_data_type(ms, ip, op_loc->reg, op_loc->offset);
  +               if (mem_type)
  +                       istat->good++;
  +               else
  +                       istat->bad++;

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: linux-toolchains@vger.kernel.org
Cc: linux-trace-devel@vger.kernel.org
Link: https://lore.kernel.org/r/20231213001323.718046-18-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2023-12-12 16:13:23 -08:00 committed by Arnaldo Carvalho de Melo
parent 61a9741e9f
commit 58824fa008
3 changed files with 87 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
tools/perf/builtin-annotate.c
View File

@ -58,6 +58,7 @@ struct perf_annotate {
bool group_set;
bool data_type;
bool type_stat;
bool insn_stat;
float min_percent;
const char *sym_hist_filter;
const char *cpu_list;
@ -434,6 +435,42 @@ static void print_annotate_data_stat(struct annotated_data_stat *s)
#undef PRINT_STAT
}
static void print_annotate_item_stat(struct list_head *head, const char *title)
{
struct annotated_item_stat *istat, *pos, *iter;
int total_good, total_bad, total;
int sum1, sum2;
LIST_HEAD(tmp);
/* sort the list by count */
list_splice_init(head, &tmp);
total_good = total_bad = 0;
list_for_each_entry_safe(istat, pos, &tmp, list) {
total_good += istat->good;
total_bad += istat->bad;
sum1 = istat->good + istat->bad;
list_for_each_entry(iter, head, list) {
sum2 = iter->good + iter->bad;
if (sum1 > sum2)
break;
}
list_move_tail(&istat->list, &iter->list);
}
total = total_good + total_bad;
printf("Annotate %s stats\n", title);
printf("total %d, ok %d (%.1f%%), bad %d (%.1f%%)\n\n", total,
total_good, 100.0 * total_good / (total ?: 1),
total_bad, 100.0 * total_bad / (total ?: 1));
printf(" %-10s: %5s %5s\n", "Name", "Good", "Bad");
printf("-----------------------------------------------------------\n");
list_for_each_entry(istat, head, list)
printf(" %-10s: %5d %5d\n", istat->name, istat->good, istat->bad);
printf("\n");
}
static void hists__find_annotations(struct hists *hists,
struct evsel *evsel,
struct perf_annotate *ann)
@ -443,6 +480,8 @@ static void hists__find_annotations(struct hists *hists,
if (ann->type_stat)
print_annotate_data_stat(&ann_data_stat);
if (ann->insn_stat)
print_annotate_item_stat(&ann_insn_stat, "Instruction");
while (nd) {
struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
@ -792,6 +831,8 @@ int cmd_annotate(int argc, const char **argv)
parse_data_type),
OPT_BOOLEAN(0, "type-stat", &annotate.type_stat,
"Show stats for the data type annotation"),
OPT_BOOLEAN(0, "insn-stat", &annotate.insn_stat,
"Show instruction stats for the data type annotation"),
OPT_END()
};
int ret;

38
tools/perf/util/annotate.c
View File

@ -105,6 +105,7 @@ static struct ins_ops ret_ops;
/* Data type collection debug statistics */
struct annotated_data_stat ann_data_stat;
LIST_HEAD(ann_insn_stat);
static int arch__grow_instructions(struct arch *arch)
{
@ -3665,6 +3666,30 @@ static struct disasm_line *find_disasm_line(struct symbol *sym, u64 ip)
return NULL;
}
static struct annotated_item_stat *annotate_data_stat(struct list_head *head,
const char *name)
{
struct annotated_item_stat *istat;
list_for_each_entry(istat, head, list) {
if (!strcmp(istat->name, name))
return istat;
}
istat = zalloc(sizeof(*istat));
if (istat == NULL)
return NULL;
istat->name = strdup(name);
if (istat->name == NULL) {
free(istat);
return NULL;
}
list_add_tail(&istat->list, head);
return istat;
}
/**
* hist_entry__get_data_type - find data type for given hist entry
* @he: hist entry
@ -3683,6 +3708,7 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
struct annotated_insn_loc loc;
struct annotated_op_loc *op_loc;
struct annotated_data_type *mem_type;
struct annotated_item_stat *istat;
u64 ip = he->ip;
int i;
@ -3716,8 +3742,15 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
return NULL;
}
istat = annotate_data_stat(&ann_insn_stat, dl->ins.name);
if (istat == NULL) {
ann_data_stat.no_insn++;
return NULL;
}
if (annotate_get_insn_location(arch, dl, &loc) < 0) {
ann_data_stat.no_insn_ops++;
istat->bad++;
return NULL;
}
@ -3726,6 +3759,10 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
continue;
mem_type = find_data_type(ms, ip, op_loc->reg, op_loc->offset);
if (mem_type)
istat->good++;
else
istat->bad++;
if (symbol_conf.annotate_data_sample) {
annotated_data_type__update_samples(mem_type, evsel,
@ -3738,5 +3775,6 @@ struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he)
}
ann_data_stat.no_mem_ops++;
istat->bad++;
return NULL;
}

8
tools/perf/util/annotate.h
View File

@ -479,4 +479,12 @@ int annotate_get_insn_location(struct arch *arch, struct disasm_line *dl,
/* Returns a data type from the sample instruction (if any) */
struct annotated_data_type *hist_entry__get_data_type(struct hist_entry *he);
struct annotated_item_stat {
struct list_head list;
char *name;
int good;
int bad;
};
extern struct list_head ann_insn_stat;
#endif /* __PERF_ANNOTATE_H */