linux-kernel - [PATCH 3/5] perf/tools: add support for PERF_SAMPLE_SKID

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Date:   Thu, 15 Jun 2017 06:56:27 -0700
From:   Stephane Eranian <eranian@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     acme@...hat.com, peterz@...radead.org, mingo@...e.hu,
        ak@...ux.intel.com, kan.liang@...el.com, jolsa@...hat.com
Subject: [PATCH 3/5] perf/tools: add support for PERF_SAMPLE_SKID_IP

This patch adds the support code to handle the PERF_SAMPLE_SKID_IP
record type.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
---
 tools/include/uapi/linux/perf_event.h |  4 +++-
 tools/perf/perf.h                     |  1 +
 tools/perf/util/event.h               |  1 +
 tools/perf/util/evsel.c               | 11 ++++++++++-
 tools/perf/util/session.c             |  3 +++
 5 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index b1c0b187acfe..0ebb6bee75a9 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -139,8 +139,9 @@ enum perf_event_sample_format {
 	PERF_SAMPLE_IDENTIFIER			= 1U << 16,
 	PERF_SAMPLE_TRANSACTION			= 1U << 17,
 	PERF_SAMPLE_REGS_INTR			= 1U << 18,
+	PERF_SAMPLE_SKID_IP			= 1U << 19,
 
-	PERF_SAMPLE_MAX = 1U << 19,		/* non-ABI */
+	PERF_SAMPLE_MAX = 1U << 20,		/* non-ABI */
 };
 
 /*
@@ -791,6 +792,7 @@ enum perf_event_type {
 	 *	{ u64			transaction; } && PERF_SAMPLE_TRANSACTION
 	 *	{ u64			abi; # enum perf_sample_regs_abi
 	 *	  u64			regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
+	 *	{ u64			skid_ip; } && PERF_SAMPLE_SKID_IP
 	 * };
 	 */
 	PERF_RECORD_SAMPLE			= 9,
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 806c216a1078..64ce89a61f8c 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -57,6 +57,7 @@ struct record_opts {
 	bool	     tail_synthesize;
 	bool	     overwrite;
 	bool	     ignore_missing_thread;
+	bool	     skid_ip;
 	unsigned int freq;
 	unsigned int mmap_pages;
 	unsigned int auxtrace_mmap_pages;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 7c3fa1c8cbcd..f19bf5e5696c 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -199,6 +199,7 @@ struct perf_sample {
 	u32 cpu;
 	u32 raw_size;
 	u64 data_src;
+	u64 skid_ip;
 	u32 flags;
 	u16 insn_len;
 	u8  cpumode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index e4f7902d5afa..08d71e83bd07 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -937,6 +937,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
 	if (opts->sample_weight)
 		perf_evsel__set_sample_bit(evsel, WEIGHT);
 
+	if (opts->skid_ip)
+		perf_evsel__set_sample_bit(evsel, SKID_IP);
+
 	attr->task  = track;
 	attr->mmap  = track;
 	attr->mmap2 = track && !perf_missing_features.mmap2;
@@ -1319,7 +1322,7 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
 		bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
 		bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
 		bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
-		bit_name(WEIGHT),
+		bit_name(WEIGHT), bit_name(SKID_IP),
 		{ .name = NULL, }
 	};
 #undef bit_name
@@ -2043,6 +2046,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
 		}
 	}
 
+	data->skid_ip = 0;
+	if (type & PERF_SAMPLE_SKID_IP) {
+		data->skid_ip = *array;
+		array++;
+	}
+
 	return 0;
 }
 
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 7dc1096264c5..0bfc1051c708 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1123,6 +1123,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 
 	if (sample_type & PERF_SAMPLE_READ)
 		sample_read__printf(sample, evsel->attr.read_format);
+
+	if (sample_type & PERF_SAMPLE_SKID_IP)
+		printf("... skid_ip: %" PRIu64 "\n", sample->skid_ip);
 }
 
 static struct machine *machines__find_for_cpumode(struct machines *machines,
-- 
2.13.1.518.g3df882009-goog