[PATCH v1 3/4] perf tools: Add 'suppress_aux' attribute bit definition and fallback

[Alexander Shishkin]

This adds support for suppress_aux, the switch that enables suppressing
not-so-useful PERF_RECORD_AUX records. Also handle kernels where it's
not supported.

Signed-off-by: Alexander Shishkin <alexander.shish...@linux.intel.com>
---
 tools/perf/util/evsel.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f894893c203d..794e56b42c20 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -50,6 +50,7 @@ static struct {
        bool lbr_flags;
        bool write_backward;
        bool group_read;
+       bool suppress_aux;
 } perf_missing_features;
 
 static clockid_t clockid;
@@ -1570,6 +1571,7 @@ int perf_event_attr__fprintf(FILE *fp, struct 
perf_event_attr *attr,
        PRINT_ATTRf(use_clockid, p_unsigned);
        PRINT_ATTRf(context_switch, p_unsigned);
        PRINT_ATTRf(write_backward, p_unsigned);
+       PRINT_ATTRf(suppress_aux, p_unsigned);
 
        PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, 
p_unsigned);
        PRINT_ATTRf(bp_type, p_unsigned);
@@ -1686,6 +1688,8 @@ int perf_evsel__open(struct perf_evsel *evsel, struct 
cpu_map *cpus,
                                     PERF_SAMPLE_BRANCH_NO_CYCLES);
        if (perf_missing_features.group_read && evsel->attr.inherit)
                evsel->attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
+       if (perf_missing_features.suppress_aux && evsel->attr.suppress_aux)
+               evsel->attr.suppress_aux = 0;
 retry_sample_id:
        if (perf_missing_features.sample_id_all)
                evsel->attr.sample_id_all = 0;
@@ -1847,6 +1851,11 @@ int perf_evsel__open(struct perf_evsel *evsel, struct 
cpu_map *cpus,
                perf_missing_features.group_read = true;
                pr_debug2("switching off group read\n");
                goto fallback_missing_features;
+       } else if (!perf_missing_features.suppress_aux &&
+                  evsel->attr.suppress_aux) {
+               perf_missing_features.suppress_aux = true;
+               pr_debug2("switching off suppress_aux\n");
+               goto fallback_missing_features;
        }
 out_close:
        do {
-- 
2.15.0