Document only epoll1 for these stats, add missing spot

src/core/lib/debug/stats_data.c

@@ -70,16 +70,18 @@ const char *grpc_stats_counter_doc[GRPC_STATS_COUNTER_COUNT] = {
     "Number of server side calls created by this process",
     "Number of polling syscalls (epoll_wait, poll, etc) made by this process",
     "Number of sleeping syscalls made by this process",
-    "How many polling wakeups were performed by the process",
-    "How many times was a polling wakeup requested without an active poller",
+    "How many polling wakeups were performed by the process (only valid for "
+    "epoll1 right now)",
+    "How many times was a polling wakeup requested without an active poller "
+    "(only valid for epoll1 right now)",
     "How many times was the same polling worker awoken repeatedly before "
-    "waking up",
+    "waking up (only valid for epoll1 right now)",
     "How many times was an eventfd used as the wakeup vector for a polling "
-    "wakeup",
+    "wakeup (only valid for epoll1 right now)",
     "How many times was a condition variable used as the wakeup vector for a "
-    "polling wakeup",
+    "polling wakeup (only valid for epoll1 right now)",
     "How many times could a polling wakeup be satisfied by keeping the waking "
-    "thread awake?",
+    "thread awake? (only valid for epoll1 right now)",
     "Number of times histogram increments went through the slow (binary "
     "search) path",
     "Number of write syscalls (or equivalent - eg sendmsg) made by this "

src/core/lib/debug/stats_data.yaml

@@ -35,20 +35,26 @@
   doc: How many events are called for each syscall_poll
 - counter: pollset_kick
   doc: How many polling wakeups were performed by the process
+       (only valid for epoll1 right now)
 - counter: pollset_kicked_without_poller
   doc: How many times was a polling wakeup requested without an active poller
+       (only valid for epoll1 right now)
 - counter: pollset_kicked_again
   doc: How many times was the same polling worker awoken repeatedly before
        waking up
+       (only valid for epoll1 right now)
 - counter: pollset_kick_wakeup_fd
   doc: How many times was an eventfd used as the wakeup vector for a polling
        wakeup
+       (only valid for epoll1 right now)
 - counter: pollset_kick_wakeup_cv
   doc: How many times was a condition variable used as the wakeup vector for a
        polling wakeup
+       (only valid for epoll1 right now)
 - counter: pollset_kick_own_thread
   doc: How many times could a polling wakeup be satisfied by keeping the waking
        thread awake?
+       (only valid for epoll1 right now)
 # stats system
 - counter: histogram_slow_lookups
   doc: Number of times histogram increments went through the slow

src/core/lib/iomgr/ev_epoll1_linux.c

@@ -789,7 +789,7 @@ static bool begin_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
 }
 
 static bool check_neighbourhood_for_available_poller(
-    pollset_neighbourhood *neighbourhood) {
+    grpc_exec_ctx *exec_ctx, pollset_neighbourhood *neighbourhood) {
   GPR_TIMER_BEGIN("check_neighbourhood_for_available_poller", 0);
   bool found_worker = false;
   do {
@@ -813,6 +813,7 @@ static bool check_neighbourhood_for_available_poller(
               SET_KICK_STATE(inspect_worker, DESIGNATED_POLLER);
               if (inspect_worker->initialized_cv) {
                 GPR_TIMER_MARK("signal worker", 0);
+                GRPC_STATS_INC_POLLSET_KICK_WAKEUP_CV(exec_ctx);
                 gpr_cv_signal(&inspect_worker->cv);
               }
             } else {
@@ -891,7 +892,7 @@ static void end_worker(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
                               g_num_neighbourhoods];
         if (gpr_mu_trylock(&neighbourhood->mu)) {
           found_worker =
-              check_neighbourhood_for_available_poller(neighbourhood);
+              check_neighbourhood_for_available_poller(exec_ctx, neighbourhood);
           gpr_mu_unlock(&neighbourhood->mu);
           scan_state[i] = true;
         } else {
@@ -904,7 +905,8 @@ static void end_worker(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
             &g_neighbourhoods[(poller_neighbourhood_idx + i) %
                               g_num_neighbourhoods];
         gpr_mu_lock(&neighbourhood->mu);
-        found_worker = check_neighbourhood_for_available_poller(neighbourhood);
+        found_worker =
+            check_neighbourhood_for_available_poller(exec_ctx, neighbourhood);
         gpr_mu_unlock(&neighbourhood->mu);
       }
       grpc_exec_ctx_flush(exec_ctx);