![Adrian Hunter](/assets/img/avatar_default.png)
Tracing for a workload begins before the comm event is seen, which results in the initial comm having a string of the form ":<pid>" (e.g. ":12345"). In order to export the correct string, defer the export until the new script 'flush' callback. 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/1414678188-14946-8-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
429 lines
9 KiB
C
429 lines
9 KiB
C
/*
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* db-export.c: Support for exporting data suitable for import to a database
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <errno.h>
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#include "evsel.h"
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#include "machine.h"
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#include "thread.h"
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#include "comm.h"
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#include "symbol.h"
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#include "event.h"
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#include "util.h"
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#include "thread-stack.h"
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#include "db-export.h"
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struct deferred_export {
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struct list_head node;
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struct comm *comm;
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};
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static int db_export__deferred(struct db_export *dbe)
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{
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struct deferred_export *de;
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int err;
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while (!list_empty(&dbe->deferred)) {
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de = list_entry(dbe->deferred.next, struct deferred_export,
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node);
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err = dbe->export_comm(dbe, de->comm);
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list_del(&de->node);
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free(de);
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if (err)
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return err;
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}
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return 0;
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}
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static void db_export__free_deferred(struct db_export *dbe)
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{
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struct deferred_export *de;
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while (!list_empty(&dbe->deferred)) {
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de = list_entry(dbe->deferred.next, struct deferred_export,
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node);
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list_del(&de->node);
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free(de);
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}
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}
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static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
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{
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struct deferred_export *de;
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de = zalloc(sizeof(struct deferred_export));
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if (!de)
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return -ENOMEM;
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de->comm = comm;
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list_add_tail(&de->node, &dbe->deferred);
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return 0;
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}
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int db_export__init(struct db_export *dbe)
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{
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memset(dbe, 0, sizeof(struct db_export));
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INIT_LIST_HEAD(&dbe->deferred);
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return 0;
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}
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int db_export__flush(struct db_export *dbe)
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{
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return db_export__deferred(dbe);
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}
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void db_export__exit(struct db_export *dbe)
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{
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db_export__free_deferred(dbe);
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call_return_processor__free(dbe->crp);
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dbe->crp = NULL;
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}
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int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
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{
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if (evsel->db_id)
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return 0;
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evsel->db_id = ++dbe->evsel_last_db_id;
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if (dbe->export_evsel)
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return dbe->export_evsel(dbe, evsel);
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return 0;
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}
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int db_export__machine(struct db_export *dbe, struct machine *machine)
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{
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if (machine->db_id)
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return 0;
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machine->db_id = ++dbe->machine_last_db_id;
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if (dbe->export_machine)
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return dbe->export_machine(dbe, machine);
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return 0;
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}
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int db_export__thread(struct db_export *dbe, struct thread *thread,
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struct machine *machine, struct comm *comm)
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{
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u64 main_thread_db_id = 0;
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int err;
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if (thread->db_id)
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return 0;
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thread->db_id = ++dbe->thread_last_db_id;
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if (thread->pid_ != -1) {
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struct thread *main_thread;
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if (thread->pid_ == thread->tid) {
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main_thread = thread;
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} else {
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main_thread = machine__findnew_thread(machine,
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thread->pid_,
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thread->pid_);
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if (!main_thread)
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return -ENOMEM;
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err = db_export__thread(dbe, main_thread, machine,
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comm);
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if (err)
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return err;
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if (comm) {
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err = db_export__comm_thread(dbe, comm, thread);
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if (err)
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return err;
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}
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}
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main_thread_db_id = main_thread->db_id;
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}
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if (dbe->export_thread)
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return dbe->export_thread(dbe, thread, main_thread_db_id,
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machine);
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return 0;
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}
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int db_export__comm(struct db_export *dbe, struct comm *comm,
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struct thread *main_thread)
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{
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int err;
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if (comm->db_id)
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return 0;
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comm->db_id = ++dbe->comm_last_db_id;
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if (dbe->export_comm) {
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if (main_thread->comm_set)
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err = dbe->export_comm(dbe, comm);
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else
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err = db_export__defer_comm(dbe, comm);
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if (err)
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return err;
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}
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return db_export__comm_thread(dbe, comm, main_thread);
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}
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int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
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struct thread *thread)
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{
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u64 db_id;
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db_id = ++dbe->comm_thread_last_db_id;
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if (dbe->export_comm_thread)
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return dbe->export_comm_thread(dbe, db_id, comm, thread);
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return 0;
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}
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int db_export__dso(struct db_export *dbe, struct dso *dso,
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struct machine *machine)
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{
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if (dso->db_id)
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return 0;
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dso->db_id = ++dbe->dso_last_db_id;
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if (dbe->export_dso)
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return dbe->export_dso(dbe, dso, machine);
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return 0;
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}
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int db_export__symbol(struct db_export *dbe, struct symbol *sym,
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struct dso *dso)
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{
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u64 *sym_db_id = symbol__priv(sym);
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if (*sym_db_id)
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return 0;
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*sym_db_id = ++dbe->symbol_last_db_id;
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if (dbe->export_symbol)
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return dbe->export_symbol(dbe, sym, dso);
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return 0;
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}
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static struct thread *get_main_thread(struct machine *machine, struct thread *thread)
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{
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if (thread->pid_ == thread->tid)
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return thread;
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if (thread->pid_ == -1)
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return NULL;
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return machine__find_thread(machine, thread->pid_, thread->pid_);
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}
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static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
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u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
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{
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int err;
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if (al->map) {
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struct dso *dso = al->map->dso;
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err = db_export__dso(dbe, dso, al->machine);
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if (err)
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return err;
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*dso_db_id = dso->db_id;
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if (!al->sym) {
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al->sym = symbol__new(al->addr, 0, 0, "unknown");
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if (al->sym)
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symbols__insert(&dso->symbols[al->map->type],
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al->sym);
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}
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if (al->sym) {
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u64 *db_id = symbol__priv(al->sym);
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err = db_export__symbol(dbe, al->sym, dso);
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if (err)
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return err;
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*sym_db_id = *db_id;
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*offset = al->addr - al->sym->start;
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}
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}
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return 0;
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}
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int db_export__branch_type(struct db_export *dbe, u32 branch_type,
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const char *name)
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{
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if (dbe->export_branch_type)
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return dbe->export_branch_type(dbe, branch_type, name);
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return 0;
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}
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int db_export__sample(struct db_export *dbe, union perf_event *event,
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struct perf_sample *sample, struct perf_evsel *evsel,
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struct thread *thread, struct addr_location *al)
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{
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struct export_sample es = {
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.event = event,
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.sample = sample,
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.evsel = evsel,
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.thread = thread,
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.al = al,
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};
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struct thread *main_thread;
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struct comm *comm = NULL;
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int err;
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err = db_export__evsel(dbe, evsel);
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if (err)
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return err;
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err = db_export__machine(dbe, al->machine);
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if (err)
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return err;
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main_thread = get_main_thread(al->machine, thread);
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if (main_thread)
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comm = machine__thread_exec_comm(al->machine, main_thread);
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err = db_export__thread(dbe, thread, al->machine, comm);
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if (err)
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return err;
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if (comm) {
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err = db_export__comm(dbe, comm, main_thread);
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if (err)
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return err;
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es.comm_db_id = comm->db_id;
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}
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es.db_id = ++dbe->sample_last_db_id;
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err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
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if (err)
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return err;
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if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
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sample_addr_correlates_sym(&evsel->attr)) {
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struct addr_location addr_al;
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perf_event__preprocess_sample_addr(event, sample, thread, &addr_al);
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err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
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&es.addr_sym_db_id, &es.addr_offset);
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if (err)
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return err;
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if (dbe->crp) {
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err = thread_stack__process(thread, comm, sample, al,
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&addr_al, es.db_id,
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dbe->crp);
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if (err)
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return err;
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}
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}
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if (dbe->export_sample)
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return dbe->export_sample(dbe, &es);
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return 0;
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}
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static struct {
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u32 branch_type;
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const char *name;
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} branch_types[] = {
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{0, "no branch"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
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{PERF_IP_FLAG_BRANCH, "unconditional jump"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
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"software interrupt"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
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"return from interrupt"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
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"system call"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
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"return from system call"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
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PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
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{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
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{0, NULL}
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};
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int db_export__branch_types(struct db_export *dbe)
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{
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int i, err = 0;
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for (i = 0; branch_types[i].name ; i++) {
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err = db_export__branch_type(dbe, branch_types[i].branch_type,
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branch_types[i].name);
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if (err)
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break;
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}
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return err;
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}
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int db_export__call_path(struct db_export *dbe, struct call_path *cp)
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{
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int err;
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if (cp->db_id)
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return 0;
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if (cp->parent) {
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err = db_export__call_path(dbe, cp->parent);
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if (err)
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return err;
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}
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cp->db_id = ++dbe->call_path_last_db_id;
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if (dbe->export_call_path)
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return dbe->export_call_path(dbe, cp);
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return 0;
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}
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int db_export__call_return(struct db_export *dbe, struct call_return *cr)
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{
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int err;
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if (cr->db_id)
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return 0;
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err = db_export__call_path(dbe, cr->cp);
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if (err)
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return err;
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cr->db_id = ++dbe->call_return_last_db_id;
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if (dbe->export_call_return)
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return dbe->export_call_return(dbe, cr);
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return 0;
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}
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