linux-kernel - [PATCH 6/8] perf bpf filter: Add more weight sample data support

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Message-Id: <20230219061329.1001079-7-namhyung@kernel.org>
Date:   Sat, 18 Feb 2023 22:13:27 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Song Liu <song@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Ravi Bangoria <ravi.bangoria@....com>,
        Leo Yan <leo.yan@...aro.org>,
        James Clark <james.clark@....com>, Hao Luo <haoluo@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH 6/8] perf bpf filter: Add more weight sample data support

The weight data consists of a couple of fields with the
PERF_SAMPE_WEIGHT_STRUCT.  Add weight{1,2,3} term to select them
separately.  Also add their aliases like 'ins_lat', 'p_stage_cyc'
and 'retire_lat'.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/bpf-filter.l                 | 6 ++++++
 tools/perf/util/bpf_skel/sample_filter.bpf.c | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/tools/perf/util/bpf-filter.l b/tools/perf/util/bpf-filter.l
index 5117c76c7c7a..bdc06babb028 100644
--- a/tools/perf/util/bpf-filter.l
+++ b/tools/perf/util/bpf-filter.l
@@ -61,6 +61,12 @@ addr		{ return sample(PERF_SAMPLE_ADDR); }
 period		{ return sample(PERF_SAMPLE_PERIOD); }
 txn		{ return sample(PERF_SAMPLE_TRANSACTION); }
 weight		{ return sample(PERF_SAMPLE_WEIGHT); }
+weight1		{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 1); }
+weight2		{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 2); }
+weight3		{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); }
+ins_lat		{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 2); } /* alias for weight2 */
+p_stage_cyc	{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } /* alias for weight3 */
+retire_lat	{ return sample_part(PERF_SAMPLE_WEIGHT_STRUCT, 3); } /* alias for weight3 */
 phys_addr	{ return sample(PERF_SAMPLE_PHYS_ADDR); }
 code_pgsz	{ return sample(PERF_SAMPLE_CODE_PAGE_SIZE); }
 data_pgsz	{ return sample(PERF_SAMPLE_DATA_PAGE_SIZE); }
diff --git a/tools/perf/util/bpf_skel/sample_filter.bpf.c b/tools/perf/util/bpf_skel/sample_filter.bpf.c
index e9a0633d638d..5b239f194fa9 100644
--- a/tools/perf/util/bpf_skel/sample_filter.bpf.c
+++ b/tools/perf/util/bpf_skel/sample_filter.bpf.c
@@ -46,6 +46,14 @@ static inline __u64 perf_get_sample(struct bpf_perf_event_data_kern *kctx,
 		return kctx->data->period;
 	case PERF_SAMPLE_TRANSACTION:
 		return kctx->data->txn;
+	case PERF_SAMPLE_WEIGHT_STRUCT:
+		if (entry->part == 1)
+			return kctx->data->weight.var1_dw;
+		if (entry->part == 2)
+			return kctx->data->weight.var2_w;
+		if (entry->part == 3)
+			return kctx->data->weight.var3_w;
+		/* fall through */
 	case PERF_SAMPLE_WEIGHT:
 		return kctx->data->weight.full;
 	case PERF_SAMPLE_PHYS_ADDR:
-- 
2.39.2.637.g21b0678d19-goog