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Subject[PATCH V4 10/13] perf tools: Add support for PERF_SAMPLE_CODE_PAGE_SIZE
Date
From: Stephane Eranian <eranian@google.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@google.com>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---

Changes since V3
- Use the real page size to replace enum.

tools/include/uapi/linux/perf_event.h | 4 +++-
tools/perf/Documentation/perf-record.txt | 3 +++
tools/perf/builtin-record.c | 2 ++
tools/perf/perf.h | 1 +
tools/perf/util/event.h | 1 +
tools/perf/util/evsel.c | 18 ++++++++++++++++++
6 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 0e8d222..045e218 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -142,8 +142,9 @@ enum perf_event_sample_format {
PERF_SAMPLE_REGS_INTR = 1U << 18,
PERF_SAMPLE_PHYS_ADDR = 1U << 19,
PERF_SAMPLE_DATA_PAGE_SIZE = 1U << 20,
+ PERF_SAMPLE_CODE_PAGE_SIZE = 1U << 21,

- PERF_SAMPLE_MAX = 1U << 21, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 22, /* non-ABI */

__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
};
@@ -865,6 +866,7 @@ enum perf_event_type {
* u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
* { u64 phys_addr;} && PERF_SAMPLE_PHYS_ADDR
* { u64 data_page_size;} && PERF_SAMPLE_DATA_PAGE_SIZE
+ * { u64 code_page_size;} && PERF_SAMPLE_CODE_PAGE_SIZE
* };
*/
PERF_RECORD_SAMPLE = 9,
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index c2a2875..edaaeca 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -267,6 +267,9 @@ 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 b9df9b9..cac5804 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1872,6 +1872,8 @@ 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 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/perf.h b/tools/perf/perf.h
index 87a345a..9a2348d 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -49,6 +49,7 @@ 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/event.h b/tools/perf/util/event.h
index 7ef06fc..601e085 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -208,6 +208,7 @@ struct perf_sample {
u64 data_src;
u64 phys_addr;
u64 data_page_size;
+ u64 code_page_size;
u32 flags;
u16 insn_len;
u8 cpumode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4d9e29e..541de5b 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1022,6 +1022,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
if (opts->sample_data_page_size)
perf_evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);

+ if (opts->sample_code_page_size)
+ perf_evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
+
if (opts->no_buffering) {
attr->watermark = 0;
attr->wakeup_events = 1;
@@ -1565,6 +1568,7 @@ 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(DATA_PAGE_SIZE),
+ bit_name(CODE_PAGE_SIZE),
{ .name = NULL, }
};
#undef bit_name
@@ -2401,6 +2405,12 @@ int perf_evsel__parse_sample(struct perf_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++;
+ }
+
return 0;
}

@@ -2556,6 +2566,9 @@ 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);
+
return result;
}

@@ -2730,6 +2743,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
array++;
}

+ if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
+ *array = sample->code_page_size;
+ array++;
+ }
+
return 0;
}

--
2.7.4
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