1 files changed, 339 insertions, 23 deletions

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index a23fa5d95394..b9fe7f2c14af 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -9,10 +9,13 @@
 #include <event-parse.h>
 #endif
 #include <perf/mmap.h>
+#include "callchain.h"
+#include "counts.h"
 #include "evlist.h"
 #include "evsel.h"
 #include "event.h"
 #include "print_binary.h"
+#include "record.h"
 #include "strbuf.h"
 #include "thread_map.h"
 #include "trace-event.h"
@@ -20,13 +23,6 @@
 #include "util/sample.h"
 #include <internal/lib.h>
 
-#define _PyUnicode_FromString(arg) \
-  PyUnicode_FromString(arg)
-#define _PyUnicode_FromFormat(...) \
-  PyUnicode_FromFormat(__VA_ARGS__)
-#define _PyLong_FromLong(arg) \
-  PyLong_FromLong(arg)
-
 PyMODINIT_FUNC PyInit_perf(void);
 
 #define member_def(type, member, ptype, help) \
@@ -270,6 +266,12 @@ static PyMemberDef pyrf_sample_event__members[] = {
 	{ .name = NULL, },
 };
 
+static void pyrf_sample_event__delete(struct pyrf_event *pevent)
+{
+	perf_sample__exit(&pevent->sample);
+	Py_TYPE(pevent)->tp_free((PyObject*)pevent);
+}
+
 static PyObject *pyrf_sample_event__repr(const struct pyrf_event *pevent)
 {
 	PyObject *ret;
@@ -336,23 +338,14 @@ get_tracepoint_field(struct pyrf_event *pevent, PyObject *attr_name)
 {
 	const char *str = _PyUnicode_AsString(PyObject_Str(attr_name));
 	struct evsel *evsel = pevent->evsel;
+	struct tep_event *tp_format = evsel__tp_format(evsel);
 	struct tep_format_field *field;
 
-	if (!evsel->tp_format) {
-		struct tep_event *tp_format;
-
-		tp_format = trace_event__tp_format_id(evsel->core.attr.config);
-		if (IS_ERR_OR_NULL(tp_format))
-			return NULL;
-
-		evsel->tp_format = tp_format;
-	}
-
-	field = tep_find_any_field(evsel->tp_format, str);
-	if (!field)
+	if (IS_ERR_OR_NULL(tp_format))
 		return NULL;
 
-	return tracepoint_field(pevent, field);
+	field = tep_find_any_field(tp_format, str);
+	return field ? tracepoint_field(pevent, field) : NULL;
 }
 #endif /* HAVE_LIBTRACEEVENT */
 
@@ -428,6 +421,9 @@ static int pyrf_event__setup_types(void)
 	pyrf_sample_event__type.tp_new =
 	pyrf_context_switch_event__type.tp_new =
 	pyrf_throttle_event__type.tp_new = PyType_GenericNew;
+
+	pyrf_sample_event__type.tp_dealloc = (destructor)pyrf_sample_event__delete,
+
 	err = PyType_Ready(&pyrf_mmap_event__type);
 	if (err < 0)
 		goto out;
@@ -631,6 +627,92 @@ static int pyrf_thread_map__setup_types(void)
 	return PyType_Ready(&pyrf_thread_map__type);
 }
 
+struct pyrf_counts_values {
+	PyObject_HEAD
+
+	struct perf_counts_values values;
+};
+
+static const char pyrf_counts_values__doc[] = PyDoc_STR("perf counts values object.");
+
+static void pyrf_counts_values__delete(struct pyrf_counts_values *pcounts_values)
+{
+	Py_TYPE(pcounts_values)->tp_free((PyObject *)pcounts_values);
+}
+
+#define counts_values_member_def(member, ptype, help) \
+	{ #member, ptype, \
+	  offsetof(struct pyrf_counts_values, values.member), \
+	  0, help }
+
+static PyMemberDef pyrf_counts_values_members[] = {
+	counts_values_member_def(val, T_ULONG, "Value of event"),
+	counts_values_member_def(ena, T_ULONG, "Time for which enabled"),
+	counts_values_member_def(run, T_ULONG, "Time for which running"),
+	counts_values_member_def(id, T_ULONG, "Unique ID for an event"),
+	counts_values_member_def(lost, T_ULONG, "Num of lost samples"),
+	{ .name = NULL, },
+};
+
+static PyObject *pyrf_counts_values_get_values(struct pyrf_counts_values *self, void *closure)
+{
+	PyObject *vals = PyList_New(5);
+
+	if (!vals)
+		return NULL;
+	for (int i = 0; i < 5; i++)
+		PyList_SetItem(vals, i, PyLong_FromLong(self->values.values[i]));
+
+	return vals;
+}
+
+static int pyrf_counts_values_set_values(struct pyrf_counts_values *self, PyObject *list,
+					 void *closure)
+{
+	Py_ssize_t size;
+	PyObject *item = NULL;
+
+	if (!PyList_Check(list)) {
+		PyErr_SetString(PyExc_TypeError, "Value assigned must be a list");
+		return -1;
+	}
+
+	size = PyList_Size(list);
+	for (Py_ssize_t i = 0; i < size; i++) {
+		item = PyList_GetItem(list, i);
+		if (!PyLong_Check(item)) {
+			PyErr_SetString(PyExc_TypeError, "List members should be numbers");
+			return -1;
+		}
+		self->values.values[i] = PyLong_AsLong(item);
+	}
+
+	return 0;
+}
+
+static PyGetSetDef pyrf_counts_values_getset[] = {
+	{"values", (getter)pyrf_counts_values_get_values, (setter)pyrf_counts_values_set_values,
+		"Name field", NULL},
+	{ .name = NULL, },
+};
+
+static PyTypeObject pyrf_counts_values__type = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	.tp_name	= "perf.counts_values",
+	.tp_basicsize	= sizeof(struct pyrf_counts_values),
+	.tp_dealloc	= (destructor)pyrf_counts_values__delete,
+	.tp_flags	= Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+	.tp_doc		= pyrf_counts_values__doc,
+	.tp_members	= pyrf_counts_values_members,
+	.tp_getset	= pyrf_counts_values_getset,
+};
+
+static int pyrf_counts_values__setup_types(void)
+{
+	pyrf_counts_values__type.tp_new = PyType_GenericNew;
+	return PyType_Ready(&pyrf_counts_values__type);
+}
+
 struct pyrf_evsel {
 	PyObject_HEAD
 
@@ -786,6 +868,98 @@ static PyObject *pyrf_evsel__open(struct pyrf_evsel *pevsel,
 	return Py_None;
 }
 
+static PyObject *pyrf_evsel__cpus(struct pyrf_evsel *pevsel)
+{
+	struct pyrf_cpu_map *pcpu_map = PyObject_New(struct pyrf_cpu_map, &pyrf_cpu_map__type);
+
+	if (pcpu_map)
+		pcpu_map->cpus = perf_cpu_map__get(pevsel->evsel.core.cpus);
+
+	return (PyObject *)pcpu_map;
+}
+
+static PyObject *pyrf_evsel__threads(struct pyrf_evsel *pevsel)
+{
+	struct pyrf_thread_map *pthread_map =
+		PyObject_New(struct pyrf_thread_map, &pyrf_thread_map__type);
+
+	if (pthread_map)
+		pthread_map->threads = perf_thread_map__get(pevsel->evsel.core.threads);
+
+	return (PyObject *)pthread_map;
+}
+
+/*
+ * Ensure evsel's counts and prev_raw_counts are allocated, the latter
+ * used by tool PMUs to compute the cumulative count as expected by
+ * stat's process_counter_values.
+ */
+static int evsel__ensure_counts(struct evsel *evsel)
+{
+	int nthreads, ncpus;
+
+	if (evsel->counts != NULL)
+		return 0;
+
+	nthreads = perf_thread_map__nr(evsel->core.threads);
+	ncpus = perf_cpu_map__nr(evsel->core.cpus);
+
+	evsel->counts = perf_counts__new(ncpus, nthreads);
+	if (evsel->counts == NULL)
+		return -ENOMEM;
+
+	evsel->prev_raw_counts = perf_counts__new(ncpus, nthreads);
+	if (evsel->prev_raw_counts == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static PyObject *pyrf_evsel__read(struct pyrf_evsel *pevsel,
+				  PyObject *args, PyObject *kwargs)
+{
+	struct evsel *evsel = &pevsel->evsel;
+	int cpu = 0, cpu_idx, thread = 0, thread_idx;
+	struct perf_counts_values *old_count, *new_count;
+	struct pyrf_counts_values *count_values = PyObject_New(struct pyrf_counts_values,
+							       &pyrf_counts_values__type);
+
+	if (!count_values)
+		return NULL;
+
+	if (!PyArg_ParseTuple(args, "ii", &cpu, &thread))
+		return NULL;
+
+	cpu_idx = perf_cpu_map__idx(evsel->core.cpus, (struct perf_cpu){.cpu = cpu});
+	if (cpu_idx < 0) {
+		PyErr_Format(PyExc_TypeError, "CPU %d is not part of evsel's CPUs", cpu);
+		return NULL;
+	}
+	thread_idx = perf_thread_map__idx(evsel->core.threads, thread);
+	if (thread_idx < 0) {
+		PyErr_Format(PyExc_TypeError, "Thread %d is not part of evsel's threads",
+			     thread);
+		return NULL;
+	}
+
+	if (evsel__ensure_counts(evsel))
+		return PyErr_NoMemory();
+
+	/* Set up pointers to the old and newly read counter values. */
+	old_count = perf_counts(evsel->prev_raw_counts, cpu_idx, thread_idx);
+	new_count = perf_counts(evsel->counts, cpu_idx, thread_idx);
+	/* Update the value in evsel->counts. */
+	evsel__read_counter(evsel, cpu_idx, thread_idx);
+	/* Copy the value and turn it into the delta from old_count. */
+	count_values->values = *new_count;
+	count_values->values.val -= old_count->val;
+	count_values->values.ena -= old_count->ena;
+	count_values->values.run -= old_count->run;
+	/* Save the new count over the old_count for the next read. */
+	*old_count = *new_count;
+	return (PyObject *)count_values;
+}
+
 static PyObject *pyrf_evsel__str(PyObject *self)
 {
 	struct pyrf_evsel *pevsel = (void *)self;
@@ -804,9 +978,49 @@ static PyMethodDef pyrf_evsel__methods[] = {
 		.ml_flags = METH_VARARGS | METH_KEYWORDS,
 		.ml_doc	  = PyDoc_STR("open the event selector file descriptor table.")
 	},
+	{
+		.ml_name  = "cpus",
+		.ml_meth  = (PyCFunction)pyrf_evsel__cpus,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("CPUs the event is to be used with.")
+	},
+	{
+		.ml_name  = "threads",
+		.ml_meth  = (PyCFunction)pyrf_evsel__threads,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("threads the event is to be used with.")
+	},
+	{
+		.ml_name  = "read",
+		.ml_meth  = (PyCFunction)pyrf_evsel__read,
+		.ml_flags = METH_VARARGS | METH_KEYWORDS,
+		.ml_doc	  = PyDoc_STR("read counters")
+	},
 	{ .ml_name = NULL, }
 };
 
+#define evsel_member_def(member, ptype, help) \
+	{ #member, ptype, \
+	  offsetof(struct pyrf_evsel, evsel.member), \
+	  0, help }
+
+#define evsel_attr_member_def(member, ptype, help) \
+	{ #member, ptype, \
+	  offsetof(struct pyrf_evsel, evsel.core.attr.member), \
+	  0, help }
+
+static PyMemberDef pyrf_evsel__members[] = {
+	evsel_member_def(tracking, T_BOOL, "tracking event."),
+	evsel_attr_member_def(type, T_UINT, "attribute type."),
+	evsel_attr_member_def(size, T_UINT, "attribute size."),
+	evsel_attr_member_def(config, T_ULONGLONG, "attribute config."),
+	evsel_attr_member_def(sample_period, T_ULONGLONG, "attribute sample_period."),
+	evsel_attr_member_def(sample_type, T_ULONGLONG, "attribute sample_type."),
+	evsel_attr_member_def(read_format, T_ULONGLONG, "attribute read_format."),
+	evsel_attr_member_def(wakeup_events, T_UINT, "attribute wakeup_events."),
+	{ .name = NULL, },
+};
+
 static const char pyrf_evsel__doc[] = PyDoc_STR("perf event selector list object.");
 
 static PyTypeObject pyrf_evsel__type = {
@@ -816,6 +1030,7 @@ static PyTypeObject pyrf_evsel__type = {
 	.tp_dealloc	= (destructor)pyrf_evsel__delete,
 	.tp_flags	= Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
 	.tp_doc		= pyrf_evsel__doc,
+	.tp_members	= pyrf_evsel__members,
 	.tp_methods	= pyrf_evsel__methods,
 	.tp_init	= (initproc)pyrf_evsel__init,
 	.tp_str         = pyrf_evsel__str,
@@ -856,6 +1071,16 @@ static void pyrf_evlist__delete(struct pyrf_evlist *pevlist)
 	Py_TYPE(pevlist)->tp_free((PyObject*)pevlist);
 }
 
+static PyObject *pyrf_evlist__all_cpus(struct pyrf_evlist *pevlist)
+{
+	struct pyrf_cpu_map *pcpu_map = PyObject_New(struct pyrf_cpu_map, &pyrf_cpu_map__type);
+
+	if (pcpu_map)
+		pcpu_map->cpus = perf_cpu_map__get(pevlist->evlist.core.all_cpus);
+
+	return (PyObject *)pcpu_map;
+}
+
 static PyObject *pyrf_evlist__mmap(struct pyrf_evlist *pevlist,
 				   PyObject *args, PyObject *kwargs)
 {
@@ -1026,8 +1251,63 @@ static PyObject *pyrf_evlist__open(struct pyrf_evlist *pevlist,
 	return Py_None;
 }
 
+static PyObject *pyrf_evlist__close(struct pyrf_evlist *pevlist)
+{
+	struct evlist *evlist = &pevlist->evlist;
+
+	evlist__close(evlist);
+
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
+static PyObject *pyrf_evlist__config(struct pyrf_evlist *pevlist)
+{
+	struct record_opts opts = {
+		.sample_time	     = true,
+		.mmap_pages	     = UINT_MAX,
+		.user_freq	     = UINT_MAX,
+		.user_interval	     = ULLONG_MAX,
+		.freq		     = 4000,
+		.target		     = {
+			.uses_mmap   = true,
+			.default_per_cpu = true,
+		},
+		.nr_threads_synthesize = 1,
+		.ctl_fd              = -1,
+		.ctl_fd_ack          = -1,
+		.no_buffering        = true,
+		.no_inherit          = true,
+	};
+	struct evlist *evlist = &pevlist->evlist;
+
+	evlist__config(evlist, &opts, &callchain_param);
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
+static PyObject *pyrf_evlist__disable(struct pyrf_evlist *pevlist)
+{
+	evlist__disable(&pevlist->evlist);
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
+static PyObject *pyrf_evlist__enable(struct pyrf_evlist *pevlist)
+{
+	evlist__enable(&pevlist->evlist);
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+
 static PyMethodDef pyrf_evlist__methods[] = {
 	{
+		.ml_name  = "all_cpus",
+		.ml_meth  = (PyCFunction)pyrf_evlist__all_cpus,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("CPU map union of all evsel CPU maps.")
+	},
+	{
 		.ml_name  = "mmap",
 		.ml_meth  = (PyCFunction)pyrf_evlist__mmap,
 		.ml_flags = METH_VARARGS | METH_KEYWORDS,
@@ -1040,6 +1320,12 @@ static PyMethodDef pyrf_evlist__methods[] = {
 		.ml_doc	  = PyDoc_STR("open the file descriptors.")
 	},
 	{
+		.ml_name  = "close",
+		.ml_meth  = (PyCFunction)pyrf_evlist__close,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("close the file descriptors.")
+	},
+	{
 		.ml_name  = "poll",
 		.ml_meth  = (PyCFunction)pyrf_evlist__poll,
 		.ml_flags = METH_VARARGS | METH_KEYWORDS,
@@ -1063,6 +1349,24 @@ static PyMethodDef pyrf_evlist__methods[] = {
 		.ml_flags = METH_VARARGS | METH_KEYWORDS,
 		.ml_doc	  = PyDoc_STR("reads an event.")
 	},
+	{
+		.ml_name  = "config",
+		.ml_meth  = (PyCFunction)pyrf_evlist__config,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("Apply default record options to the evlist.")
+	},
+	{
+		.ml_name  = "disable",
+		.ml_meth  = (PyCFunction)pyrf_evlist__disable,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("Disable the evsels in the evlist.")
+	},
+	{
+		.ml_name  = "enable",
+		.ml_meth  = (PyCFunction)pyrf_evlist__enable,
+		.ml_flags = METH_NOARGS,
+		.ml_doc	  = PyDoc_STR("Enable the evsels in the evlist.")
+	},
 	{ .ml_name = NULL, }
 };
 
@@ -1261,6 +1565,8 @@ static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel)
 	evsel__init(&pevsel->evsel, &evsel->core.attr, evsel->core.idx);
 
 	evsel__clone(&pevsel->evsel, evsel);
+	if (evsel__is_group_leader(evsel))
+		evsel__set_leader(&pevsel->evsel, &pevsel->evsel);
 	return (PyObject *)pevsel;
 }
 
@@ -1288,12 +1594,18 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
 	struct evlist evlist = {};
 	struct parse_events_error err;
 	PyObject *result;
+	PyObject *pcpus = NULL, *pthreads = NULL;
+	struct perf_cpu_map *cpus;
+	struct perf_thread_map *threads;
 
-	if (!PyArg_ParseTuple(args, "s", &input))
+	if (!PyArg_ParseTuple(args, "s|OO", &input, &pcpus, &pthreads))
 		return NULL;
 
+	threads = pthreads ? ((struct pyrf_thread_map *)pthreads)->threads : NULL;
+	cpus = pcpus ? ((struct pyrf_cpu_map *)pcpus)->cpus : NULL;
+
 	parse_events_error__init(&err);
-	evlist__init(&evlist, NULL, NULL);
+	evlist__init(&evlist, cpus, threads);
 	if (parse_events(&evlist, input, &err)) {
 		parse_events_error__print(&err, input);
 		PyErr_SetFromErrno(PyExc_OSError);
@@ -1343,7 +1655,8 @@ PyMODINIT_FUNC PyInit_perf(void)
 	    pyrf_evlist__setup_types() < 0 ||
 	    pyrf_evsel__setup_types() < 0 ||
 	    pyrf_thread_map__setup_types() < 0 ||
-	    pyrf_cpu_map__setup_types() < 0)
+	    pyrf_cpu_map__setup_types() < 0 ||
+	    pyrf_counts_values__setup_types() < 0)
 		return module;
 
 	/* The page_size is placed in util object. */
@@ -1388,6 +1701,9 @@ PyMODINIT_FUNC PyInit_perf(void)
 	Py_INCREF(&pyrf_cpu_map__type);
 	PyModule_AddObject(module, "cpu_map", (PyObject*)&pyrf_cpu_map__type);
 
+	Py_INCREF(&pyrf_counts_values__type);
+	PyModule_AddObject(module, "counts_values", (PyObject *)&pyrf_counts_values__type);
+
 	dict = PyModule_GetDict(module);
 	if (dict == NULL)
 		goto error;