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Subject[PATCH 1/5] perf tools: add option to record sample physical address
Date
From: Kan Liang <kan.liang@intel.com>

Add new option --phys-data for perf record to record sample physical
address. Once the option is applied, it implies that --data option is
also applied to record sample virtual address.

Signed-off-by: Kan Liang <kan.liang@intel.com>
---
tools/include/uapi/linux/perf_event.h | 4 +++-
tools/perf/Documentation/perf-record.txt | 6 +++++-
tools/perf/builtin-record.c | 9 +++++++++
tools/perf/perf.h | 1 +
tools/perf/util/event.h | 1 +
tools/perf/util/evsel.c | 17 +++++++++++++++++
tools/perf/util/session.c | 3 +++
7 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 642db5f..cbea02f 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_PHYS_ADDR = 1U << 19,

- PERF_SAMPLE_MAX = 1U << 19, /* non-ABI */
+ PERF_SAMPLE_MAX = 1U << 20, /* non-ABI */
};

/*
@@ -814,6 +815,7 @@ 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 phys_addr;} && PERF_SAMPLE_PHYS_ADDR
* };
*/
PERF_RECORD_SAMPLE = 9,
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 9bdea04..2de5927 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -249,7 +249,11 @@ OPTIONS

-d::
--data::
- Record the sample addresses.
+ Record the sample virtual addresses.
+
+--phys-data::
+ Record the sample physical addresses which implies
+ the virtual address is also recorded.

-T::
--timestamp::
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 36d7117..5c43245 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1604,6 +1604,8 @@ static struct option __record_options[] = {
OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
"per thread counts"),
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, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
&record.opts.sample_time_set,
@@ -1833,6 +1835,13 @@ int cmd_record(int argc, const char **argv)
goto out;
}

+ /*
+ * Record the sample physical addr which also implies
+ * the virtual addr is recorded.
+ */
+ if (rec->opts.sample_phys_addr)
+ rec->opts.sample_address = true;
+
if (rec->opts.target.tid && !rec->opts.no_inherit_set)
rec->opts.no_inherit = true;

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 2c010dd..dc442ba 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -43,6 +43,7 @@ struct record_opts {
bool no_samples;
bool raw_samples;
bool sample_address;
+ bool sample_phys_addr;
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 423ac82..ee7bcc8 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -200,6 +200,7 @@ struct perf_sample {
u32 cpu;
u32 raw_size;
u64 data_src;
+ u64 phys_addr;
u32 flags;
u16 insn_len;
u8 cpumode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3735c9e..f3706b3 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -950,6 +950,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
if (opts->sample_address)
perf_evsel__set_sample_bit(evsel, DATA_SRC);

+ if (opts->sample_phys_addr)
+ perf_evsel__set_sample_bit(evsel, PHYS_ADDR);
+
if (opts->no_buffering) {
attr->watermark = 0;
attr->wakeup_events = 1;
@@ -2214,6 +2217,12 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
}
}

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

@@ -2319,6 +2328,9 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
}
}

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

@@ -2508,6 +2520,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
}
}

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

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index dc453f8..5348d5c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1120,6 +1120,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
if (sample_type & PERF_SAMPLE_DATA_SRC)
printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);

+ if (sample_type & PERF_SAMPLE_PHYS_ADDR)
+ printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
+
if (sample_type & PERF_SAMPLE_TRANSACTION)
printf("... transaction: %" PRIx64 "\n", sample->transaction);

--
2.4.3
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