linux-kernel - [PATCH V6 13/16] perf tools: Add support for PERF_SAMPLE_CODE_PAGE

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Date:   Mon, 10 Aug 2020 14:24:33 -0700
From:   Kan Liang <kan.liang@...ux.intel.com>
To:     peterz@...radead.org, acme@...nel.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Cc:     mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, eranian@...gle.com, ak@...ux.intel.com,
        dave.hansen@...el.com, kirill.shutemov@...ux.intel.com
Subject: [PATCH V6 13/16] perf tools: Add support for PERF_SAMPLE_CODE_PAGE_SIZE

From: Stephane Eranian <eranian@...gle.com>

Adds the infrastructure to sample the code address page size.

Introduce a new --code-page-size option for perf record.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
---
 tools/perf/Documentation/perf-record.txt  | 3 +++
 tools/perf/builtin-record.c               | 2 ++
 tools/perf/util/event.h                   | 1 +
 tools/perf/util/evsel.c                   | 9 +++++++++
 tools/perf/util/perf_event_attr_fprintf.c | 2 +-
 tools/perf/util/record.h                  | 1 +
 tools/perf/util/synthetic-events.c        | 8 ++++++++
 7 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index cbc3f7fdf48d..3994318ac5b4 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -292,6 +292,9 @@ OPTIONS
 --data-page-size::
 	Record the sampled data address data page size
 
+--code-page-size::
+	Record the sampled code address (ip) page size
+
 -T::
 --timestamp::
 	Record the sample timestamps. Use it with 'perf report -D' to see the
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 27d8e563fe33..e44da98124ba 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -2447,6 +2447,8 @@ static struct option __record_options[] = {
 		    "Record the sample physical addresses"),
 	OPT_BOOLEAN(0, "data-page-size", &record.opts.sample_data_page_size,
 		    "Record the sampled data address data page size"),
+	OPT_BOOLEAN(0, "code-page-size", &record.opts.sample_code_page_size,
+		    "Record the sampled code address (ip) page size"),
 	OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
 	OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
 			&record.opts.sample_time_set,
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 9db85c515a8b..5bd1b31f7b7f 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -136,6 +136,7 @@ struct perf_sample {
 	u64 data_src;
 	u64 phys_addr;
 	u64 data_page_size;
+	u64 code_page_size;
 	u64 cgroup;
 	u32 flags;
 	u16 insn_len;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 9e5e986b56bc..f96fdac83a02 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1078,6 +1078,9 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts,
 	if (opts->sample_data_page_size)
 		evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
 
+	if (opts->sample_code_page_size)
+		evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
+
 	if (opts->record_switch_events)
 		attr->context_switch = track;
 
@@ -2254,6 +2257,12 @@ int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
 		array++;
 	}
 
+	data->code_page_size = 0;
+	if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
+		data->code_page_size = *array;
+		array++;
+	}
+
 	if (type & PERF_SAMPLE_AUX) {
 		OVERFLOW_CHECK_u64(array);
 		sz = *array++;
diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
index 68188c7c188a..a97a95f3b1be 100644
--- a/tools/perf/util/perf_event_attr_fprintf.c
+++ b/tools/perf/util/perf_event_attr_fprintf.c
@@ -35,7 +35,7 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
 		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(PHYS_ADDR), bit_name(AUX),
-		bit_name(CGROUP), bit_name(DATA_PAGE_SIZE),
+		bit_name(CGROUP), bit_name(DATA_PAGE_SIZE), bit_name(CODE_PAGE_SIZE),
 		{ .name = NULL, }
 	};
 #undef bit_name
diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h
index 924fcfbebd18..20141cb7a953 100644
--- a/tools/perf/util/record.h
+++ b/tools/perf/util/record.h
@@ -23,6 +23,7 @@ struct record_opts {
 	bool	      sample_address;
 	bool	      sample_phys_addr;
 	bool	      sample_data_page_size;
+	bool	      sample_code_page_size;
 	bool	      sample_weight;
 	bool	      sample_time;
 	bool	      sample_time_set;
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 0de5f8c0b867..88f8f42c6b76 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -1409,6 +1409,9 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
 	if (type & PERF_SAMPLE_DATA_PAGE_SIZE)
 		result += sizeof(u64);
 
+	if (type & PERF_SAMPLE_CODE_PAGE_SIZE)
+		result += sizeof(u64);
+
 	if (type & PERF_SAMPLE_AUX) {
 		result += sizeof(u64);
 		result += sample->aux_sample.size;
@@ -1593,6 +1596,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_fo
 		array++;
 	}
 
+	if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
+		*array = sample->code_page_size;
+		array++;
+	}
+
 	if (type & PERF_SAMPLE_AUX) {
 		sz = sample->aux_sample.size;
 		*array++ = sz;
-- 
2.17.1