perf inject: Add Instruction Tracing support

Add support for decoding an AUX area assuming it contains instruction
tracing data.  The AUX area tracing events are stripped and replaced by
synthesized events.

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: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-21-git-send-email-adrian.hunter@intel.com
[ Do not use -Z as an alternative to --itrace ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt
index dc7442c..bb1f655 100644 (file)
--- a/tools/perf/Documentation/perf-inject.txt
+++ b/tools/perf/Documentation/perf-inject.txt
@@ -44,6 +44,32 @@ OPTIONS
 --kallsyms=<file>::
        kallsyms pathname
 
+--itrace::
+       Decode Instruction Tracing data, replacing it with synthesized events.
+       Options are:
+
+               i       synthesize instructions events
+               b       synthesize branches events
+               c       synthesize branches events (calls only)
+               r       synthesize branches events (returns only)
+               e       synthesize error events
+               d       create a debug log
+               g       synthesize a call chain for instructions events
+
+       The default is all events i.e. the same as --itrace=ibe
+
+       In addition, the period (default 100000) for instructions events
+       can be specified in units of:
+
+               i       instructions
+               t       ticks
+               ms      milliseconds
+               us      microseconds
+               ns      nanoseconds (default)
+
+       Also the call chain size (default 16, max. 1024) for instructions
+       events can be specified.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-archive[1]

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 8f4cad7..c5f6515 100644 (file)
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -16,6 +16,7 @@
 #include "util/debug.h"
 #include "util/build-id.h"
 #include "util/data.h"
+#include "util/auxtrace.h"
 
 #include "util/parse-options.h"
 
@@ -30,6 +31,7 @@ struct perf_inject {
        struct perf_data_file   output;
        u64                     bytes_written;
        struct list_head        samples;
+       struct itrace_synth_opts itrace_synth_opts;
 };
 
 struct event_entry {
@@ -205,6 +207,32 @@ static int perf_event__repipe_fork(struct perf_tool *tool,
        return err;
 }
 
+static int perf_event__repipe_comm(struct perf_tool *tool,
+                                  union perf_event *event,
+                                  struct perf_sample *sample,
+                                  struct machine *machine)
+{
+       int err;
+
+       err = perf_event__process_comm(tool, event, sample, machine);
+       perf_event__repipe(tool, event, sample, machine);
+
+       return err;
+}
+
+static int perf_event__repipe_exit(struct perf_tool *tool,
+                                  union perf_event *event,
+                                  struct perf_sample *sample,
+                                  struct machine *machine)
+{
+       int err;
+
+       err = perf_event__process_exit(tool, event, sample, machine);
+       perf_event__repipe(tool, event, sample, machine);
+
+       return err;
+}
+
 static int perf_event__repipe_tracing_data(struct perf_tool *tool,
                                           union perf_event *event,
                                           struct perf_session *session)
@@ -217,6 +245,18 @@ static int perf_event__repipe_tracing_data(struct perf_tool *tool,
        return err;
 }
 
+static int perf_event__repipe_id_index(struct perf_tool *tool,
+                                      union perf_event *event,
+                                      struct perf_session *session)
+{
+       int err;
+
+       perf_event__repipe_synth(tool, event);
+       err = perf_event__process_id_index(tool, event, session);
+
+       return err;
+}
+
 static int dso__read_build_id(struct dso *dso)
 {
        if (dso->has_build_id)
@@ -401,16 +441,20 @@ static int __cmd_inject(struct perf_inject *inject)
        struct perf_session *session = inject->session;
        struct perf_data_file *file_out = &inject->output;
        int fd = perf_data_file__fd(file_out);
+       u64 output_data_offset;
 
        signal(SIGINT, sig_handler);
 
-       if (inject->build_ids || inject->sched_stat) {
+       if (inject->build_ids || inject->sched_stat ||
+           inject->itrace_synth_opts.set) {
                inject->tool.mmap         = perf_event__repipe_mmap;
                inject->tool.mmap2        = perf_event__repipe_mmap2;
                inject->tool.fork         = perf_event__repipe_fork;
                inject->tool.tracing_data = perf_event__repipe_tracing_data;
        }
 
+       output_data_offset = session->header.data_offset;
+
        if (inject->build_ids) {
                inject->tool.sample = perf_event__inject_buildid;
        } else if (inject->sched_stat) {
@@ -429,10 +473,22 @@ static int __cmd_inject(struct perf_inject *inject)
                        else if (!strncmp(name, "sched:sched_stat_", 17))
                                evsel->handler = perf_inject__sched_stat;
                }
+       } else if (inject->itrace_synth_opts.set) {
+               session->itrace_synth_opts = &inject->itrace_synth_opts;
+               inject->itrace_synth_opts.inject = true;
+               inject->tool.comm           = perf_event__repipe_comm;
+               inject->tool.exit           = perf_event__repipe_exit;
+               inject->tool.id_index       = perf_event__repipe_id_index;
+               inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
+               inject->tool.auxtrace       = perf_event__process_auxtrace;
+               inject->tool.ordered_events = true;
+               inject->tool.ordering_requires_timestamps = true;
+               /* Allow space in the header for new attributes */
+               output_data_offset = 4096;
        }
 
        if (!file_out->is_pipe)
-               lseek(fd, session->header.data_offset, SEEK_SET);
+               lseek(fd, output_data_offset, SEEK_SET);
 
        ret = perf_session__process_events(session);
 
@@ -440,6 +496,14 @@ static int __cmd_inject(struct perf_inject *inject)
                if (inject->build_ids)
                        perf_header__set_feat(&session->header,
                                              HEADER_BUILD_ID);
+               /*
+                * The AUX areas have been removed and replaced with
+                * synthesized hardware events, so clear the feature flag.
+                */
+               if (inject->itrace_synth_opts.set)
+                       perf_header__clear_feat(&session->header,
+                                               HEADER_AUXTRACE);
+               session->header.data_offset = output_data_offset;
                session->header.data_size = inject->bytes_written;
                perf_session__write_header(session, session->evlist, fd, true);
        }
@@ -497,6 +561,9 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
                OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
                           "kallsyms pathname"),
                OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
+               OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
+                                   NULL, "opts", "Instruction Tracing options",
+                                   itrace_parse_synth_opts),
                OPT_END()
        };
        const char * const inject_usage[] = {