perf scripting python: Extend interface to export data in a database-friendly way

Use the new db_export facility to export data in a database-friendly
way.

A Python script selects the db_export mode by setting a global variable
'perf_db_export_mode' to True.  The script then optionally implements
functions to receive table rows.  The functions are:

	evsel_table
	machine_table
	thread_table
	comm_table
	dso_table
	symbol_table
	sample_table

An example script is provided in a subsequent patch.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1414061124-26830-7-git-send-email-adrian.hunter@intel.com
[ Reserve space for per symbol db_id space when perf_db_export_mode is on ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index 25e5a238f1cb3d4bb1a233cf5c7d2263da1c07a7..2fd7ee8f18c7b782cda39a8cc9aaffe012127208 100644 (file)
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -24,6 +24,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdbool.h>
 #include <errno.h>
 
 #include "../../perf.h"
@@ -33,6 +34,9 @@
 #include "../util.h"
 #include "../event.h"
 #include "../thread.h"
+#include "../comm.h"
+#include "../machine.h"
+#include "../db-export.h"
 #include "../trace-event.h"
 #include "../machine.h"
 
@@ -53,6 +57,21 @@ static int zero_flag_atom;
 
 static PyObject *main_module, *main_dict;
 
+struct tables {
+       struct db_export        dbe;
+       PyObject                *evsel_handler;
+       PyObject                *machine_handler;
+       PyObject                *thread_handler;
+       PyObject                *comm_handler;
+       PyObject                *comm_thread_handler;
+       PyObject                *dso_handler;
+       PyObject                *symbol_handler;
+       PyObject                *sample_handler;
+       bool                    db_export_mode;
+};
+
+static struct tables tables_global;
+
 static void handler_call_die(const char *handler_name) NORETURN;
 static void handler_call_die(const char *handler_name)
 {
@@ -475,6 +494,211 @@ static void python_process_tracepoint(struct perf_sample *sample,
        Py_DECREF(t);
 }
 
+static PyObject *tuple_new(unsigned int sz)
+{
+       PyObject *t;
+
+       t = PyTuple_New(sz);
+       if (!t)
+               Py_FatalError("couldn't create Python tuple");
+       return t;
+}
+
+static int tuple_set_u64(PyObject *t, unsigned int pos, u64 val)
+{
+#if BITS_PER_LONG == 64
+       return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
+#endif
+#if BITS_PER_LONG == 32
+       return PyTuple_SetItem(t, pos, PyLong_FromLongLong(val));
+#endif
+}
+
+static int tuple_set_s32(PyObject *t, unsigned int pos, s32 val)
+{
+       return PyTuple_SetItem(t, pos, PyInt_FromLong(val));
+}
+
+static int tuple_set_string(PyObject *t, unsigned int pos, const char *s)
+{
+       return PyTuple_SetItem(t, pos, PyString_FromString(s));
+}
+
+static int python_export_evsel(struct db_export *dbe, struct perf_evsel *evsel)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(2);
+
+       tuple_set_u64(t, 0, evsel->db_id);
+       tuple_set_string(t, 1, perf_evsel__name(evsel));
+
+       call_object(tables->evsel_handler, t, "evsel_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_machine(struct db_export *dbe,
+                                struct machine *machine)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(3);
+
+       tuple_set_u64(t, 0, machine->db_id);
+       tuple_set_s32(t, 1, machine->pid);
+       tuple_set_string(t, 2, machine->root_dir ? machine->root_dir : "");
+
+       call_object(tables->machine_handler, t, "machine_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_thread(struct db_export *dbe, struct thread *thread,
+                               u64 main_thread_db_id, struct machine *machine)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(5);
+
+       tuple_set_u64(t, 0, thread->db_id);
+       tuple_set_u64(t, 1, machine->db_id);
+       tuple_set_u64(t, 2, main_thread_db_id);
+       tuple_set_s32(t, 3, thread->pid_);
+       tuple_set_s32(t, 4, thread->tid);
+
+       call_object(tables->thread_handler, t, "thread_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_comm(struct db_export *dbe, struct comm *comm)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(2);
+
+       tuple_set_u64(t, 0, comm->db_id);
+       tuple_set_string(t, 1, comm__str(comm));
+
+       call_object(tables->comm_handler, t, "comm_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_comm_thread(struct db_export *dbe, u64 db_id,
+                                    struct comm *comm, struct thread *thread)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(3);
+
+       tuple_set_u64(t, 0, db_id);
+       tuple_set_u64(t, 1, comm->db_id);
+       tuple_set_u64(t, 2, thread->db_id);
+
+       call_object(tables->comm_thread_handler, t, "comm_thread_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_dso(struct db_export *dbe, struct dso *dso,
+                            struct machine *machine)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+       PyObject *t;
+
+       build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
+
+       t = tuple_new(5);
+
+       tuple_set_u64(t, 0, dso->db_id);
+       tuple_set_u64(t, 1, machine->db_id);
+       tuple_set_string(t, 2, dso->short_name);
+       tuple_set_string(t, 3, dso->long_name);
+       tuple_set_string(t, 4, sbuild_id);
+
+       call_object(tables->dso_handler, t, "dso_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_symbol(struct db_export *dbe, struct symbol *sym,
+                               struct dso *dso)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       u64 *sym_db_id = symbol__priv(sym);
+       PyObject *t;
+
+       t = tuple_new(6);
+
+       tuple_set_u64(t, 0, *sym_db_id);
+       tuple_set_u64(t, 1, dso->db_id);
+       tuple_set_u64(t, 2, sym->start);
+       tuple_set_u64(t, 3, sym->end);
+       tuple_set_s32(t, 4, sym->binding);
+       tuple_set_string(t, 5, sym->name);
+
+       call_object(tables->symbol_handler, t, "symbol_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
+static int python_export_sample(struct db_export *dbe,
+                               struct export_sample *es)
+{
+       struct tables *tables = container_of(dbe, struct tables, dbe);
+       PyObject *t;
+
+       t = tuple_new(19);
+
+       tuple_set_u64(t, 0, es->db_id);
+       tuple_set_u64(t, 1, es->evsel->db_id);
+       tuple_set_u64(t, 2, es->al->machine->db_id);
+       tuple_set_u64(t, 3, es->thread->db_id);
+       tuple_set_u64(t, 4, es->comm_db_id);
+       tuple_set_u64(t, 5, es->dso_db_id);
+       tuple_set_u64(t, 6, es->sym_db_id);
+       tuple_set_u64(t, 7, es->offset);
+       tuple_set_u64(t, 8, es->sample->ip);
+       tuple_set_u64(t, 9, es->sample->time);
+       tuple_set_s32(t, 10, es->sample->cpu);
+       tuple_set_u64(t, 11, es->addr_dso_db_id);
+       tuple_set_u64(t, 12, es->addr_sym_db_id);
+       tuple_set_u64(t, 13, es->addr_offset);
+       tuple_set_u64(t, 14, es->sample->addr);
+       tuple_set_u64(t, 15, es->sample->period);
+       tuple_set_u64(t, 16, es->sample->weight);
+       tuple_set_u64(t, 17, es->sample->transaction);
+       tuple_set_u64(t, 18, es->sample->data_src);
+
+       call_object(tables->sample_handler, t, "sample_table");
+
+       Py_DECREF(t);
+
+       return 0;
+}
+
 static void python_process_general_event(struct perf_sample *sample,
                                         struct perf_evsel *evsel,
                                         struct thread *thread,
@@ -551,19 +775,25 @@ exit:
        Py_DECREF(t);
 }
 
-static void python_process_event(union perf_event *event __maybe_unused,
+static void python_process_event(union perf_event *event,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
                                 struct thread *thread,
                                 struct addr_location *al)
 {
+       struct tables *tables = &tables_global;
+
        switch (evsel->attr.type) {
        case PERF_TYPE_TRACEPOINT:
                python_process_tracepoint(sample, evsel, thread, al);
                break;
        /* Reserve for future process_hw/sw/raw APIs */
        default:
-               python_process_general_event(sample, evsel, thread, al);
+               if (tables->db_export_mode)
+                       db_export__sample(&tables->dbe, event, sample, evsel,
+                                         thread, al);
+               else
+                       python_process_general_event(sample, evsel, thread, al);
        }
 }
 
@@ -589,11 +819,57 @@ error:
        return -1;
 }
 
+#define SET_TABLE_HANDLER_(name, handler_name, table_name) do {                \
+       tables->handler_name = get_handler(#table_name);                \
+       if (tables->handler_name)                                       \
+               tables->dbe.export_ ## name = python_export_ ## name;   \
+} while (0)
+
+#define SET_TABLE_HANDLER(name) \
+       SET_TABLE_HANDLER_(name, name ## _handler, name ## _table)
+
+static void set_table_handlers(struct tables *tables)
+{
+       const char *perf_db_export_mode = "perf_db_export_mode";
+       PyObject *db_export_mode;
+       int ret;
+
+       memset(tables, 0, sizeof(struct tables));
+       if (db_export__init(&tables->dbe))
+               Py_FatalError("failed to initialize export");
+
+       db_export_mode = PyDict_GetItemString(main_dict, perf_db_export_mode);
+       if (!db_export_mode)
+               return;
+
+       ret = PyObject_IsTrue(db_export_mode);
+       if (ret == -1)
+               handler_call_die(perf_db_export_mode);
+       if (!ret)
+               return;
+
+       tables->db_export_mode = true;
+       /*
+        * Reserve per symbol space for symbol->db_id via symbol__priv()
+        */
+       symbol_conf.priv_size = sizeof(u64);
+
+       SET_TABLE_HANDLER(evsel);
+       SET_TABLE_HANDLER(machine);
+       SET_TABLE_HANDLER(thread);
+       SET_TABLE_HANDLER(comm);
+       SET_TABLE_HANDLER(comm_thread);
+       SET_TABLE_HANDLER(dso);
+       SET_TABLE_HANDLER(symbol);
+       SET_TABLE_HANDLER(sample);
+}
+
 /*
  * Start trace script
  */
 static int python_start_script(const char *script, int argc, const char **argv)
 {
+       struct tables *tables = &tables_global;
        const char **command_line;
        char buf[PATH_MAX];
        int i, err = 0;
@@ -632,6 +908,8 @@ static int python_start_script(const char *script, int argc, const char **argv)
 
        free(command_line);
 
+       set_table_handlers(tables);
+
        return err;
 error:
        Py_Finalize();
@@ -650,8 +928,12 @@ static int python_flush_script(void)
  */
 static int python_stop_script(void)
 {
+       struct tables *tables = &tables_global;
+
        try_call_object("trace_end", NULL);
 
+       db_export__exit(&tables->dbe);
+
        Py_XDECREF(main_dict);
        Py_XDECREF(main_module);
        Py_Finalize();