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perf scripting python: Extend interface to export data in a database-…
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…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>
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Adrian Hunter authored and Arnaldo Carvalho de Melo committed Oct 29, 2014
1 parent 0db15b1 commit df919b4
Showing 1 changed file with 284 additions and 2 deletions.
286 changes: 284 additions & 2 deletions tools/perf/util/scripting-engines/trace-event-python.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>

#include "../../perf.h"
Expand All @@ -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"

Expand All @@ -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)
{
Expand Down Expand Up @@ -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,
Expand Down Expand Up @@ -551,19 +775,25 @@ static void python_process_general_event(struct perf_sample *sample,
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);
}
}

Expand All @@ -589,11 +819,57 @@ static int run_start_sub(void)
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;
Expand Down Expand Up @@ -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();
Expand All @@ -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();
Expand Down

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