lkml.org 
[lkml]   [2017]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 3/4] perf tools: Add 'suppress_aux' attribute bit definition and fallback
Date
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.shishkin@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
\
 
 \ /
  Last update: 2017-11-14 13:40    [W:0.046 / U:0.068 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site