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Subject[PATCH RFC 2/7] perf tools: Support new sample type for page size
Date
From: Kan Liang <kan.liang@linux.intel.com>

Support new sample type PERF_SAMPLE_PAGE_SIZE for page size.

Add new option --page-size to record sample page size.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
tools/include/uapi/linux/perf_event.h | 13 ++++++++++++-
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 | 19 ++++++++++++++++++-
6 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index eeb787b..5473443 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -141,8 +141,9 @@ enum perf_event_sample_format {
PERF_SAMPLE_TRANSACTION = 1U << 17,
PERF_SAMPLE_REGS_INTR = 1U << 18,
PERF_SAMPLE_PHYS_ADDR = 1U << 19,
+ PERF_SAMPLE_PAGE_SIZE = 1U << 20,

- PERF_SAMPLE_MAX = 1U << 20, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 21, /* non-ABI */

__PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63,
};
@@ -861,6 +862,7 @@ enum perf_event_type {
* { u64 abi; # enum perf_sample_regs_abi
* u64 regs[weight(mask)]; } && PERF_SAMPLE_REGS_INTR
* { u64 phys_addr;} && PERF_SAMPLE_PHYS_ADDR
+ * { u64 page_size;} && PERF_SAMPLE_PAGE_SIZE
* };
*/
PERF_RECORD_SAMPLE = 9,
@@ -1099,6 +1101,15 @@ union perf_mem_data_src {
#define PERF_MEM_S(a, s) \
(((__u64)PERF_MEM_##a##_##s) << PERF_MEM_##a##_SHIFT)

+
+enum perf_mem_page_size {
+ PERF_MEM_PAGE_SIZE_NONE,
+ PERF_MEM_PAGE_SIZE_4K,
+ PERF_MEM_PAGE_SIZE_2M,
+ PERF_MEM_PAGE_SIZE_1G,
+ PERF_MEM_PAGE_SIZE_512G,
+};
+
/*
* single taken branch record layout:
*
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 246dee0..ddfe4be 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -264,6 +264,9 @@ OPTIONS
--phys-data::
Record the sample physical addresses.

+--page-size::
+ Record the sample 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 22ebeb92..7f27dbe 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1600,6 +1600,8 @@ static struct option __record_options[] = {
OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr,
"Record the sample physical addresses"),
+ OPT_BOOLEAN(0, "page-size", &record.opts.sample_page_size,
+ "Record the sample 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 21bf7f5..db06458 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -48,6 +48,7 @@ struct record_opts {
bool raw_samples;
bool sample_address;
bool sample_phys_addr;
+ bool sample_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 bfa60bc..51456b8 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -202,6 +202,7 @@ struct perf_sample {
u32 raw_size;
u64 data_src;
u64 phys_addr;
+ u64 page_size;
u32 flags;
u16 insn_len;
u8 cpumode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index ddf84b9..8cf7ec3 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1015,6 +1015,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
if (opts->sample_phys_addr)
perf_evsel__set_sample_bit(evsel, PHYS_ADDR);

+ if (opts->sample_page_size)
+ perf_evsel__set_sample_bit(evsel, PAGE_SIZE);
+
if (opts->no_buffering) {
attr->watermark = 0;
attr->wakeup_events = 1;
@@ -1540,7 +1543,7 @@ 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(PHYS_ADDR),
+ bit_name(WEIGHT), bit_name(PHYS_ADDR), bit_name(PAGE_SIZE),
{ .name = NULL, }
};
#undef bit_name
@@ -2357,6 +2360,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
array++;
}

+ data->page_size = 0;
+ if (type & PERF_SAMPLE_PAGE_SIZE) {
+ data->page_size = *array;
+ array++;
+ }
+
return 0;
}

@@ -2509,6 +2518,9 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
if (type & PERF_SAMPLE_PHYS_ADDR)
result += sizeof(u64);

+ if (type & PERF_SAMPLE_PAGE_SIZE)
+ result += sizeof(u64);
+
return result;
}

@@ -2678,6 +2690,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
array++;
}

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

--
2.7.4
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