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perf script: Handle missing fields with -F +..

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When using -F + syntax to add a field the existing defaults are
currently all marked user_set. This can cause errors when some field is
missing in the perf.data

This patch tracks the actually user set fields separately, so that we don't
error out in this case.

Before:

  % perf record true
  % perf script -F +metric
  Samples for 'cycles:ppp' event do not have CPU attribute set. Cannot print 'cpu' field.
  %

After:

  5 perf record true
  % perf script -F +metric
              perf 28936 278636.237688:          1 cycles:ppp:  ffffffff8117da99 perf_event_exec+0x59 (/lib/modules/4.20.0-odilo/build/vmlinux)
  ...
  %

Signed-off-by: Andi Kleen <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Andi Kleen 2019-02-24 07:37:12 -08:00 • committed by Arnaldo Carvalho de Melo
commit 4b6ac811bc
1 changed files with 7 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

10
tools/perf/builtin-script.c
View file

@ -149,6 +149,7 @@ static struct {
unsigned int print_ip_opts;
u64 fields;
u64 invalid_fields;
u64 user_set_fields;
} output[OUTPUT_TYPE_MAX] = {
[PERF_TYPE_HARDWARE] = {
@ -345,7 +346,7 @@ static int perf_evsel__do_check_stype(struct perf_evsel *evsel,
if (attr->sample_type & sample_type)
return 0;
if (output[type].user_set) {
if (output[type].user_set_fields & field) {
if (allow_user_set)
return 0;
evname = perf_evsel__name(evsel);
@ -2632,10 +2633,13 @@ parse:
pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
all_output_options[i].str, event_type(j));
} else {
if (change == REMOVE)
if (change == REMOVE) {
output[j].fields &= ~all_output_options[i].field;
else
output[j].user_set_fields &= ~all_output_options[i].field;
} else {
output[j].fields |= all_output_options[i].field;
output[j].user_set_fields |= all_output_options[i].field;
}
output[j].user_set = true;
output[j].wildcard_set = true;
}