stats: support multiple works for error counters

The current code only allowed access to the main thread error counters.
That is not so useful for a multi worker instance.
No return a vector indexed by thread of counter_t values.

Type: fix

Change-Id: Ie322c8889c0c8175e1116e71de04a2cf453b9ed7
Signed-off-by: Ole Troan <ot@cisco.com>

3 files changed, 15 insertions, 5 deletions

diff --git a/src/vpp/stats/stat_segment.c b/src/vpp/stats/stat_segment.c
index bb2ffad8f6d..4cd00a22641 100644
--- a/src/vpp/stats/stat_segment.c
+++ b/src/vpp/stats/stat_segment.c
@@ -22,6 +22,7 @@
 #undef HAVE_MEMFD_CREATE
 #include <vppinfra/linux/syscall.h>
 #include <vpp-api/client/stat_client.h>
+
 stat_segment_main_t stat_segment_main;
 
 /*
@@ -200,22 +201,29 @@ stat_validate_counter_vector (stat_segment_directory_entry_t * ep, u32 max)
 }
 
 void
-vlib_stats_pop_heap2 (u64 * error_vector, u32 thread_index, void *oldheap)
+vlib_stats_pop_heap2 (u64 * error_vector, u32 thread_index, void *oldheap,
+		      int lock)
 {
   stat_segment_main_t *sm = &stat_segment_main;
   stat_segment_shared_header_t *shared_header = sm->shared_header;
 
   ASSERT (shared_header);
 
-  vlib_stat_segment_lock ();
+  if (lock)
+    vlib_stat_segment_lock ();
 
   /* Reset the client hash table pointer, since it WILL change! */
-  shared_header->error_offset =
+  vec_validate (sm->error_vector, thread_index);
+  sm->error_vector[thread_index] =
     stat_segment_offset (shared_header, error_vector);
+
+  shared_header->error_offset =
+    stat_segment_offset (shared_header, sm->error_vector);
   shared_header->directory_offset =
     stat_segment_offset (shared_header, sm->directory_vector);
 
-  vlib_stat_segment_unlock ();
+  if (lock)
+    vlib_stat_segment_unlock ();
   clib_mem_set_heap (oldheap);
 }
 
diff --git a/src/vpp/stats/stat_segment.h b/src/vpp/stats/stat_segment.h
index fd7ce79cabe..b9ffedf2169 100644
--- a/src/vpp/stats/stat_segment.h
+++ b/src/vpp/stats/stat_segment.h
@@ -110,6 +110,7 @@ typedef struct
   /* statistics segment */
   uword *directory_vector_by_name;
   stat_segment_directory_entry_t *directory_vector;
+  u64 *error_vector;
   u8 **interfaces;
   u8 **nodes;
 
diff --git a/src/vpp/stats/stats.md b/src/vpp/stats/stats.md
index 6a62ca6c8ad..20ca7909baa 100644
--- a/src/vpp/stats/stats.md
+++ b/src/vpp/stats/stats.md
@@ -106,7 +106,8 @@ int main (int argc, char **argv) {
       break;
 
       case STAT_DIR_TYPE_ERROR_INDEX:
-        fformat (stdout, "%llu %s\n", res[i].error_value, res[i].name);
+	 for (j = 0; j < vec_len (res[i].error_vector); j++)
+	   fformat (stdout, "[@%d] %llu %s\n", j, res[i].error_vector[j], res[i].name);
       break;
 
       case STAT_DIR_TYPE_SCALAR_INDEX: