[tip:perf/core] perf script: Add synthesized Intel PT power and ptwrite events

[tip-bot for Adrian Hunter]

Commit-ID:  65c5e18f9df078f40abd22a3f6983eb9804b6d02
Gitweb:     http://git.kernel.org/tip/65c5e18f9df078f40abd22a3f6983eb9804b6d02
Author:     Adrian Hunter <adrian.hunter@xxxxxxxxx>
AuthorDate: Fri, 30 Jun 2017 11:36:42 +0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 30 Jun 2017 11:40:20 -0300

perf script: Add synthesized Intel PT power and ptwrite events

Add definitions for synthesized Intel PT events for power and ptwrite.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1498811802-2301-1-git-send-email-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-script.c | 114 +++++++++++++++++++++++++++++++++++++++++-
 tools/perf/util/event.h     | 118 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 231 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index e87b480..b458a0c 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1203,10 +1203,122 @@ static void print_sample_bpf_output(struct perf_sample *sample)
 		       (char *)(sample->raw_data));
 }
 
-static void print_sample_synth(struct perf_sample *sample __maybe_unused,
+static void print_sample_spacing(int len, int spacing)
+{
+	if (len > 0 && len < spacing)
+		printf("%*s", spacing - len, "");
+}
+
+static void print_sample_pt_spacing(int len)
+{
+	print_sample_spacing(len, 34);
+}
+
+static void print_sample_synth_ptwrite(struct perf_sample *sample)
+{
+	struct perf_synth_intel_ptwrite *data = perf_sample__synth_ptr(sample);
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	len = printf(" IP: %u payload: %#" PRIx64 " ",
+		     data->ip, le64_to_cpu(data->payload));
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth_mwait(struct perf_sample *sample)
+{
+	struct perf_synth_intel_mwait *data = perf_sample__synth_ptr(sample);
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	len = printf(" hints: %#x extensions: %#x ",
+		     data->hints, data->extensions);
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth_pwre(struct perf_sample *sample)
+{
+	struct perf_synth_intel_pwre *data = perf_sample__synth_ptr(sample);
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	len = printf(" hw: %u cstate: %u sub-cstate: %u ",
+		     data->hw, data->cstate, data->subcstate);
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth_exstop(struct perf_sample *sample)
+{
+	struct perf_synth_intel_exstop *data = perf_sample__synth_ptr(sample);
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	len = printf(" IP: %u ", data->ip);
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth_pwrx(struct perf_sample *sample)
+{
+	struct perf_synth_intel_pwrx *data = perf_sample__synth_ptr(sample);
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	len = printf(" deepest cstate: %u last cstate: %u wake reason: %#x ",
+		     data->deepest_cstate, data->last_cstate,
+		     data->wake_reason);
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth_cbr(struct perf_sample *sample)
+{
+	struct perf_synth_intel_cbr *data = perf_sample__synth_ptr(sample);
+	unsigned int percent, freq;
+	int len;
+
+	if (perf_sample__bad_synth_size(sample, *data))
+		return;
+
+	freq = (le32_to_cpu(data->freq) + 500) / 1000;
+	len = printf(" cbr: %2u freq: %4u MHz ", data->cbr, freq);
+	if (data->max_nonturbo) {
+		percent = (5 + (1000 * data->cbr) / data->max_nonturbo) / 10;
+		len += printf("(%3u%%) ", percent);
+	}
+	print_sample_pt_spacing(len);
+}
+
+static void print_sample_synth(struct perf_sample *sample,
 			       struct perf_evsel *evsel)
 {
 	switch (evsel->attr.config) {
+	case PERF_SYNTH_INTEL_PTWRITE:
+		print_sample_synth_ptwrite(sample);
+		break;
+	case PERF_SYNTH_INTEL_MWAIT:
+		print_sample_synth_mwait(sample);
+		break;
+	case PERF_SYNTH_INTEL_PWRE:
+		print_sample_synth_pwre(sample);
+		break;
+	case PERF_SYNTH_INTEL_EXSTOP:
+		print_sample_synth_exstop(sample);
+		break;
+	case PERF_SYNTH_INTEL_PWRX:
+		print_sample_synth_pwrx(sample);
+		break;
+	case PERF_SYNTH_INTEL_CBR:
+		print_sample_synth_cbr(sample);
+		break;
 	default:
 		break;
 	}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 855733c..9967c87 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -255,6 +255,124 @@ enum auxtrace_error_type {
 /* Attribute type for custom synthesized events */
 #define PERF_TYPE_SYNTH		(INT_MAX + 1U)
 
+/* Attribute config for custom synthesized events */
+enum perf_synth_id {
+	PERF_SYNTH_INTEL_PTWRITE,
+	PERF_SYNTH_INTEL_MWAIT,
+	PERF_SYNTH_INTEL_PWRE,
+	PERF_SYNTH_INTEL_EXSTOP,
+	PERF_SYNTH_INTEL_PWRX,
+	PERF_SYNTH_INTEL_CBR,
+};
+
+/*
+ * Raw data formats for synthesized events. Note that 4 bytes of padding are
+ * present to match the 'size' member of PERF_SAMPLE_RAW data which is always
+ * 8-byte aligned. That means we must dereference raw_data with an offset of 4.
+ * Refer perf_sample__synth_ptr() and perf_synth__raw_data().  It also means the
+ * structure sizes are 4 bytes bigger than the raw_size, refer
+ * perf_synth__raw_size().
+ */
+
+struct perf_synth_intel_ptwrite {
+	u32 padding;
+	union {
+		struct {
+			u32	ip		:  1,
+				reserved	: 31;
+		};
+		u32	flags;
+	};
+	u64	payload;
+};
+
+struct perf_synth_intel_mwait {
+	u32 padding;
+	u32 reserved;
+	union {
+		struct {
+			u64	hints		:  8,
+				reserved1	: 24,
+				extensions	:  2,
+				reserved2	: 30;
+		};
+		u64	payload;
+	};
+};
+
+struct perf_synth_intel_pwre {
+	u32 padding;
+	u32 reserved;
+	union {
+		struct {
+			u64	reserved1	:  7,
+				hw		:  1,
+				subcstate	:  4,
+				cstate		:  4,
+				reserved2	: 48;
+		};
+		u64	payload;
+	};
+};
+
+struct perf_synth_intel_exstop {
+	u32 padding;
+	union {
+		struct {
+			u32	ip		:  1,
+				reserved	: 31;
+		};
+		u32	flags;
+	};
+};
+
+struct perf_synth_intel_pwrx {
+	u32 padding;
+	u32 reserved;
+	union {
+		struct {
+			u64	deepest_cstate	:  4,
+				last_cstate	:  4,
+				wake_reason	:  4,
+				reserved1	: 52;
+		};
+		u64	payload;
+	};
+};
+
+struct perf_synth_intel_cbr {
+	u32 padding;
+	union {
+		struct {
+			u32	cbr		:  8,
+				reserved1	:  8,
+				max_nonturbo	:  8,
+				reserved2	:  8;
+		};
+		u32	flags;
+	};
+	u32 freq;
+	u32 reserved3;
+};
+
+/*
+ * raw_data is always 4 bytes from an 8-byte boundary, so subtract 4 to get
+ * 8-byte alignment.
+ */
+static inline void *perf_sample__synth_ptr(struct perf_sample *sample)
+{
+	return sample->raw_data - 4;
+}
+
+static inline void *perf_synth__raw_data(void *p)
+{
+	return p + 4;
+}
+
+#define perf_synth__raw_size(d) (sizeof(d) - 4)
+
+#define perf_sample__bad_synth_size(s, d) ((s)->raw_size < sizeof(d) - 4)
+
 /*
  * The kernel collects the number of events it couldn't send in a stretch and
  * when possible sends this number in a PERF_RECORD_LOST event. The number of