Also record peak values for queued bytes/fds in connection stats

Reviewed-by: Cosimo Alfarano <cosimo.alfarano@collabora.co.uk>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=34040

7 files changed, 77 insertions, 9 deletions

diff --git a/bus/stats.c b/bus/stats.c
index d395bc0e..28fd49ba 100644
--- a/bus/stats.c
+++ b/bus/stats.c
@@ -261,8 +261,8 @@ bus_stats_handle_get_connection_stats (DBusConnection *caller_connection,
   DBusMessage *reply = NULL;
   DBusMessageIter iter, arr_iter;
   static dbus_uint32_t stats_serial = 0;
-  dbus_uint32_t in_messages, in_bytes, in_fds;
-  dbus_uint32_t out_messages, out_bytes, out_fds;
+  dbus_uint32_t in_messages, in_bytes, in_fds, in_peak_bytes, in_peak_fds;
+  dbus_uint32_t out_messages, out_bytes, out_fds, out_peak_bytes, out_peak_fds;
   BusRegistry *registry;
   BusService *service;
   DBusConnection *stats_connection;
@@ -313,14 +313,20 @@ bus_stats_handle_get_connection_stats (DBusConnection *caller_connection,
 
   _dbus_connection_get_stats (stats_connection,
                               &in_messages, &in_bytes, &in_fds,
-                              &out_messages, &out_bytes, &out_fds);
+                              &in_peak_bytes, &in_peak_fds,
+                              &out_messages, &out_bytes, &out_fds,
+                              &out_peak_bytes, &out_peak_fds);
 
   if (!asv_add_uint32 (&iter, &arr_iter, "IncomingMessages", in_messages) ||
       !asv_add_uint32 (&iter, &arr_iter, "IncomingBytes", in_bytes) ||
       !asv_add_uint32 (&iter, &arr_iter, "IncomingFDs", in_fds) ||
+      !asv_add_uint32 (&iter, &arr_iter, "PeakIncomingBytes", in_peak_bytes) ||
+      !asv_add_uint32 (&iter, &arr_iter, "PeakIncomingFDs", in_peak_fds) ||
       !asv_add_uint32 (&iter, &arr_iter, "OutgoingMessages", out_messages) ||
       !asv_add_uint32 (&iter, &arr_iter, "OutgoingBytes", out_bytes) ||
-      !asv_add_uint32 (&iter, &arr_iter, "OutgoingFDs", out_fds))
+      !asv_add_uint32 (&iter, &arr_iter, "OutgoingFDs", out_fds) ||
+      !asv_add_uint32 (&iter, &arr_iter, "PeakOutgoingBytes", out_peak_bytes) ||
+      !asv_add_uint32 (&iter, &arr_iter, "PeakOutgoingFDs", out_peak_fds))
     goto oom;
 
   /* end */
diff --git a/dbus/dbus-connection-internal.h b/dbus/dbus-connection-internal.h
index 60d51458..3dc5989e 100644
--- a/dbus/dbus-connection-internal.h
+++ b/dbus/dbus-connection-internal.h
@@ -108,9 +108,13 @@ void _dbus_connection_get_stats (DBusConnection *connection,
                                  dbus_uint32_t  *in_messages,
                                  dbus_uint32_t  *in_bytes,
                                  dbus_uint32_t  *in_fds,
+                                 dbus_uint32_t  *in_peak_bytes,
+                                 dbus_uint32_t  *in_peak_fds,
                                  dbus_uint32_t  *out_messages,
                                  dbus_uint32_t  *out_bytes,
-                                 dbus_uint32_t  *out_fds);
+                                 dbus_uint32_t  *out_fds,
+                                 dbus_uint32_t  *out_peak_bytes,
+                                 dbus_uint32_t  *out_peak_fds);
 
 /* This _dbus_bus_* stuff doesn't really belong here, but dbus-bus-internal.h seems
  * silly for one function
diff --git a/dbus/dbus-connection.c b/dbus/dbus-connection.c
index 62792dba..82b05f39 100644
--- a/dbus/dbus-connection.c
+++ b/dbus/dbus-connection.c
@@ -6163,16 +6163,21 @@ _dbus_connection_get_stats (DBusConnection *connection,
                             dbus_uint32_t  *in_messages,
                             dbus_uint32_t  *in_bytes,
                             dbus_uint32_t  *in_fds,
+                            dbus_uint32_t  *in_peak_bytes,
+                            dbus_uint32_t  *in_peak_fds,
                             dbus_uint32_t  *out_messages,
                             dbus_uint32_t  *out_bytes,
-                            dbus_uint32_t  *out_fds)
+                            dbus_uint32_t  *out_fds,
+                            dbus_uint32_t  *out_peak_bytes,
+                            dbus_uint32_t  *out_peak_fds)
 {
   CONNECTION_LOCK (connection);
 
   if (in_messages != NULL)
     *in_messages = connection->n_incoming;
 
-  _dbus_transport_get_stats (connection->transport, in_bytes, in_fds);
+  _dbus_transport_get_stats (connection->transport,
+                             in_bytes, in_fds, in_peak_bytes, in_peak_fds);
 
   if (out_messages != NULL)
     *out_messages = connection->n_outgoing;
@@ -6183,6 +6188,12 @@ _dbus_connection_get_stats (DBusConnection *connection,
   if (out_fds != NULL)
     *out_fds = _dbus_counter_get_unix_fd_value (connection->outgoing_counter);
 
+  if (out_peak_bytes != NULL)
+    *out_peak_bytes = _dbus_counter_get_peak_size_value (connection->outgoing_counter);
+
+  if (out_peak_fds != NULL)
+    *out_peak_fds = _dbus_counter_get_peak_unix_fd_value (connection->outgoing_counter);
+
   CONNECTION_UNLOCK (connection);
 }
 #endif /* DBUS_ENABLE_STATS */
diff --git a/dbus/dbus-resources.c b/dbus/dbus-resources.c
index 5f7001cc..d7346d6f 100644
--- a/dbus/dbus-resources.c
+++ b/dbus/dbus-resources.c
@@ -58,6 +58,11 @@ struct DBusCounter
   long size_value;       /**< current size counter value */
   long unix_fd_value;    /**< current unix fd counter value */
 
+#ifdef DBUS_ENABLE_STATS
+  long peak_size_value;     /**< largest ever size counter value */
+  long peak_unix_fd_value;  /**< largest ever unix fd counter value */
+#endif
+
   long notify_size_guard_value;    /**< call notify function when crossing this size value */
   long notify_unix_fd_guard_value; /**< call notify function when crossing this unix fd value */
 
@@ -91,6 +96,11 @@ _dbus_counter_new (void)
   counter->size_value = 0;
   counter->unix_fd_value = 0;
 
+#ifdef DBUS_ENABLE_STATS
+  counter->peak_size_value = 0;
+  counter->peak_unix_fd_value = 0;
+#endif
+
   counter->notify_size_guard_value = 0;
   counter->notify_unix_fd_guard_value = 0;
   counter->notify_function = NULL;
@@ -152,6 +162,11 @@ _dbus_counter_adjust_size (DBusCounter *counter,
 
   counter->size_value += delta;
 
+#ifdef DBUS_ENABLE_STATS
+  if (counter->peak_size_value < counter->size_value)
+    counter->peak_size_value = counter->size_value;
+#endif
+
 #if 0
   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
                  old, delta, counter->size_value);
@@ -182,6 +197,11 @@ _dbus_counter_adjust_unix_fd (DBusCounter *counter,
   
   counter->unix_fd_value += delta;
 
+#ifdef DBUS_ENABLE_STATS
+  if (counter->peak_unix_fd_value < counter->unix_fd_value)
+    counter->peak_unix_fd_value = counter->unix_fd_value;
+#endif
+
 #if 0
   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
                  old, delta, counter->unix_fd_value);
@@ -243,4 +263,18 @@ _dbus_counter_set_notify (DBusCounter               *counter,
   counter->notify_data = user_data;
 }
 
+#ifdef DBUS_ENABLE_STATS
+long
+_dbus_counter_get_peak_size_value (DBusCounter *counter)
+{
+  return counter->peak_size_value;
+}
+
+long
+_dbus_counter_get_peak_unix_fd_value (DBusCounter *counter)
+{
+  return counter->peak_unix_fd_value;
+}
+#endif
+
 /** @} */  /* end of resource limits exported API */
diff --git a/dbus/dbus-resources.h b/dbus/dbus-resources.h
index 4763a97f..ebbdce97 100644
--- a/dbus/dbus-resources.h
+++ b/dbus/dbus-resources.h
@@ -51,6 +51,9 @@ void _dbus_counter_set_notify    (DBusCounter               *counter,
                                   DBusCounterNotifyFunction  function,
                                   void                      *user_data);
 
+/* if DBUS_ENABLE_STATS */
+long _dbus_counter_get_peak_size_value    (DBusCounter *counter);
+long _dbus_counter_get_peak_unix_fd_value (DBusCounter *counter);
 
 DBUS_END_DECLS
 
diff --git a/dbus/dbus-transport.c b/dbus/dbus-transport.c
index 8ab643bf..3cbe7998 100644
--- a/dbus/dbus-transport.c
+++ b/dbus/dbus-transport.c
@@ -1486,13 +1486,21 @@ _dbus_transport_set_allow_anonymous (DBusTransport              *transport,
 void
 _dbus_transport_get_stats (DBusTransport  *transport,
                            dbus_uint32_t  *queue_bytes,
-                           dbus_uint32_t  *queue_fds)
+                           dbus_uint32_t  *queue_fds,
+                           dbus_uint32_t  *peak_queue_bytes,
+                           dbus_uint32_t  *peak_queue_fds)
 {
   if (queue_bytes != NULL)
     *queue_bytes = _dbus_counter_get_size_value (transport->live_messages);
 
   if (queue_fds != NULL)
     *queue_fds = _dbus_counter_get_unix_fd_value (transport->live_messages);
+
+  if (peak_queue_bytes != NULL)
+    *peak_queue_bytes = _dbus_counter_get_peak_size_value (transport->live_messages);
+
+  if (peak_queue_fds != NULL)
+    *peak_queue_fds = _dbus_counter_get_peak_unix_fd_value (transport->live_messages);
 }
 #endif /* DBUS_ENABLE_STATS */
 
diff --git a/dbus/dbus-transport.h b/dbus/dbus-transport.h
index 0aeab183..4b821517 100644
--- a/dbus/dbus-transport.h
+++ b/dbus/dbus-transport.h
@@ -100,7 +100,9 @@ void               _dbus_transport_set_allow_anonymous    (DBusTransport
 /* if DBUS_ENABLE_STATS */
 void _dbus_transport_get_stats (DBusTransport  *transport,
                                 dbus_uint32_t  *queue_bytes,
-                                dbus_uint32_t  *queue_fds);
+                                dbus_uint32_t  *queue_fds,
+                                dbus_uint32_t  *peak_queue_bytes,
+                                dbus_uint32_t  *peak_queue_fds);
 
 DBUS_END_DECLS