event logger skeletons, improve debug CLI

Change-Id: Ieb2e4043fc7bc3b4a5436a7a6aa35f573d8d4506
Signed-off-by: Dave Barach <dave@barachs.net>

2 files changed, 183 insertions, 5 deletions

diff --git a/vlib/vlib/elog_samples.c b/vlib/vlib/elog_samples.c
new file mode 100644
index 00000000000..0a5cd202252
--- /dev/null
+++ b/vlib/vlib/elog_samples.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vlib/vlib.h>
+#include <vppinfra/elog.h>
+
+static inline void elog_four_int_sample (u32 *data)
+{
+  ELOG_TYPE_DECLARE(e) = 
+    {
+      .format = "four int: first %d second %d third %d fourth %d",
+      .format_args = "i4i4i4i4",
+    };
+  struct { u32 data[4];} * ed;
+  ed = ELOG_DATA (&vlib_global_main.elog_main, e);
+  ed->data[0] = data[0];
+  ed->data[1] = data[1];
+  ed->data[2] = data[2];
+  ed->data[3] = data[3];
+}
+
+static inline void elog_four_int_track_sample (u32 *data)
+{
+  ELOG_TYPE_DECLARE(e) = 
+    {
+      .format = "four_int_track: first %d second %d third %d fourth %d",
+      .format_args = "i4i4i4i4",
+    };
+  struct { u32 data[4];} * ed;
+  ELOG_TRACK(sample_track);
+  ed = ELOG_TRACK_DATA (&vlib_global_main.elog_main, e, sample_track);
+  ed->data[0] = data[0];
+  ed->data[1] = data[1];
+  ed->data[2] = data[2];
+  ed->data[3] = data[3];
+}
+
+static inline void elog_enum_sample (u8 which)
+{
+  ELOG_TYPE_DECLARE (e) = 
+    {
+      .format = "my enum: %s",
+      .format_args = "t1",
+      .n_enum_strings = 2,
+      .enum_strings = 
+      {
+        "string 1",
+        "string 2", 
+      },
+    };
+  struct { u8 which;} * ed;
+  ed = ELOG_DATA (&vlib_global_main.elog_main, e);
+  ed->which = which;
+}
+
+static inline void elog_one_datum_sample (u32 data)
+{
+  ELOG_TYPE_DECLARE (e) = 
+    {
+      .format = "one datum: %d",
+      .format_args = "i4",
+    };
+  
+  elog (&vlib_global_main.elog_main, &e, data);
+}
+
+static clib_error_t *
+test_elog_command_fn (vlib_main_t * vm,
+		 unformat_input_t * input,
+		 vlib_cli_command_t * cmd)
+{
+  int i;
+  u32 samples[4];
+
+  for (i = 0; i < 10; i++)
+    {
+      samples[0] = i;
+      samples[1] = i+1;
+      samples[2] = i+2;
+      samples[3] = i+3;
+
+      elog_four_int_sample (samples);
+      elog_four_int_track_sample (samples);
+      elog_enum_sample (0);
+      elog_enum_sample (1);
+      elog_one_datum_sample (i);
+    }
+
+  return 0;
+}
+
+VLIB_CLI_COMMAND (test_elog_command, static) = {
+  .path = "test elog sample",
+  .short_help = "test elog sample",
+  .function = test_elog_command_fn,
+};
diff --git a/vlib/vlib/main.c b/vlib/vlib/main.c
index fe9a7da8243..07cf7fb2e6b 100644
--- a/vlib/vlib/main.c
+++ b/vlib/vlib/main.c
@@ -665,8 +665,8 @@ vlib_cli_elog_clear (vlib_main_t * vm,
 }
 
 VLIB_CLI_COMMAND (elog_clear_cli, static) = {
-  .path = "clear event-logger",
-  .short_help = "Clear current event log",
+  .path = "event-logger clear",
+  .short_help = "Clear the event log",
   .function = vlib_cli_elog_clear,
 };
 
@@ -711,11 +711,78 @@ elog_save_buffer (vlib_main_t * vm,
 }
 
 VLIB_CLI_COMMAND (elog_save_cli, static) = {
-  .path = "save event-logger",
-  .short_help = "save event-logger <filename> (saves log in /tmp/<filename>)",
+  .path = "event-logger save",
+  .short_help = "event-logger save <filename> (saves log in /tmp/<filename>)",
   .function = elog_save_buffer,
 };
 
+static clib_error_t *
+elog_stop (vlib_main_t * vm,
+           unformat_input_t * input,
+           vlib_cli_command_t * cmd)
+{
+  elog_main_t * em = &vm->elog_main;
+
+  em->n_total_events_disable_limit = em->n_total_events;
+
+  vlib_cli_output (vm, "Stopped the event logger...");
+  return 0;
+}
+
+VLIB_CLI_COMMAND (elog_stop_cli, static) = {
+  .path = "event-logger stop",
+  .short_help = "Stop the event-logger",
+  .function = elog_stop,
+};
+
+static clib_error_t *
+elog_restart (vlib_main_t * vm,
+            unformat_input_t * input,
+            vlib_cli_command_t * cmd)
+{
+  elog_main_t * em = &vm->elog_main;
+
+  em->n_total_events_disable_limit = ~0;
+
+  vlib_cli_output (vm, "Restarted the event logger...");
+  return 0;
+}
+
+VLIB_CLI_COMMAND (elog_restart_cli, static) = {
+  .path = "event-logger restart",
+  .short_help = "Restart the event-logger",
+  .function = elog_restart,
+};
+
+static clib_error_t *
+elog_resize (vlib_main_t * vm,
+             unformat_input_t * input,
+             vlib_cli_command_t * cmd)
+{
+  elog_main_t * em = &vm->elog_main;
+  u32 tmp;
+
+  /* Stop the parade */
+  elog_reset_buffer (&vm->elog_main);
+
+  if (unformat (input, "%d", &tmp))
+    {
+      elog_alloc (em, tmp);
+      em->n_total_events_disable_limit = ~0;
+    }
+  else 
+    return clib_error_return (0, "Must specify how many events in the ring");
+
+  vlib_cli_output (vm, "Resized ring and restarted the event logger...");
+  return 0;
+}
+
+VLIB_CLI_COMMAND (elog_resize_cli, static) = {
+  .path = "event-logger resize",
+  .short_help = "event-logger resize <nnn>",
+  .function = elog_resize,
+};
+
 #endif /* CLIB_UNIX */
 
 static void elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
@@ -729,7 +796,10 @@ static void elog_show_buffer_internal (vlib_main_t * vm, u32 n_events_to_show)
     * vm->clib_time.seconds_per_clock;
 
   es = elog_peek_events (em);
-  vlib_cli_output (vm, "%d events in buffer", vec_len (es));
+  vlib_cli_output (vm, "%d of %d events in buffer, logger %s", vec_len (es), 
+                   em->event_ring_size,
+                   em->n_total_events < em->n_total_events_disable_limit ?
+                   "running" : "stopped");
   vec_foreach (e, es)
     {
       vlib_cli_output (vm, "%18.9f: %U",