perf report: add --dump-raw-trace option

To help the inspection of various data files, implement an ASCII dump
method that just dumps the records as they are read in - then we exit.

[ Impact: new feature ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 38 insertions, 1 deletions

diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index e17819001dd5..8ea8aaa05af5 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -20,6 +20,8 @@ static char		const *input_name = "output.perf";
 static int              input;
 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
 
+static int              dump_trace = 0;
+
 static unsigned long    page_size;
 static unsigned long    mmap_window = 32;
 
@@ -643,7 +645,7 @@ static int __cmd_report(void)
         char *buf;
         event_t *event;
         int ret, rc = EXIT_FAILURE;
-        unsigned long total = 0;
+        unsigned long total = 0, total_mmap = 0, total_comm = 0;
 
         input = open(input_name, O_RDONLY);
         if (input < 0) {
@@ -706,6 +708,13 @@ more:
                 struct thread *thread = threads__findnew(event->ip.pid);
                 uint64_t ip = event->ip.ip;
 
+                if (dump_trace) {
+                        fprintf(stderr, "PERF_EVENT (IP, %d): %d: %p\n",
+                                event->header.misc,
+                                event->ip.pid,
+                                (void *)event->ip.ip);
+                }
+
                 if (thread == NULL) {
                         fprintf(stderr, "problem processing %d event, bailing out\n",
                                 event->header.type);
@@ -743,23 +752,40 @@ more:
                 struct thread *thread = threads__findnew(event->mmap.pid);
                 struct map *map = map__new(&event->mmap);
 
+                if (dump_trace) {
+                        fprintf(stderr, "PERF_EVENT_MMAP: [%p(%p) @ %p]: %s\n",
+                                (void *)event->mmap.start,
+                                (void *)event->mmap.len,
+                                (void *)event->mmap.pgoff,
+                                event->mmap.filename);
+                }
                 if (thread == NULL || map == NULL) {
                         fprintf(stderr, "problem processing PERF_EVENT_MMAP, bailing out\n");
                         goto done;
                 }
                 thread__insert_map(thread, map);
+                total_mmap++;
                 break;
         }
         case PERF_EVENT_COMM: {
                 struct thread *thread = threads__findnew(event->comm.pid);
 
+                if (dump_trace) {
+                        fprintf(stderr, "PERF_EVENT_COMM: %s:%d\n",
+                                event->comm.comm, event->comm.pid);
+                }
                 if (thread == NULL ||
                     thread__set_comm(thread, event->comm.comm)) {
                         fprintf(stderr, "problem processing PERF_EVENT_COMM, bailing out\n");
                         goto done;
                 }
+                total_comm++;
                 break;
         }
+        default: {
+                fprintf(stderr, "skipping unknown header type: %d\n",
+                        event->header.type);
+        }
         }
 
         if (offset + head < stat.st_size)
@@ -768,6 +794,15 @@ more:
         rc = EXIT_SUCCESS;
 done:
         close(input);
+
+        if (dump_trace) {
+                fprintf(stderr, "   IP events: %10ld\n", total);
+                fprintf(stderr, " mmap events: %10ld\n", total_mmap);
+                fprintf(stderr, " comm events: %10ld\n", total_comm);
+
+                return 0;
+        }
+
         //dsos__fprintf(stdout);
         threads__fprintf(stdout);
 #if 0
@@ -796,6 +831,8 @@ static const char * const report_usage[] = {
 static const struct option options[] = {
         OPT_STRING('i', "input", &input_name, "file",
                     "input file name"),
+        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                    "dump raw trace in ASCII"),
         OPT_END()
 };