Add table_index system in poller in order for daemon to be aware of stale data

skynet/dgpu/daemon.py

@@ -183,9 +183,16 @@ async def maybe_serve_one(
 async def dgpu_serve_forever(config: Config, conn: NetConnector):
     await maybe_update_tui_balance(conn)
 
+    last_poll_idx = -1
     try:
         while True:
             await conn.wait_data_update()
+            if conn.poll_index == last_poll_idx:
+                await trio.sleep(config.poll_time)
+                continue
+
+            last_poll_idx = conn.poll_index
+
             queue = conn._tables['queue']
 
             random.shuffle(queue)

skynet/dgpu/network.py

@@ -67,6 +67,8 @@ class NetConnector:
 
         self.ipfs_client = AsyncIPFSHTTP(config.ipfs_url)
 
+        # poll_index is used to detect stale data
+        self.poll_index = 0
         self._tables = {
             'queue': [],
             'requests': {},
@@ -180,6 +182,7 @@ class NetConnector:
             self._data_event.set()
             await trio.sleep(max(poll_time - elapsed, 0.1))
             self._data_event = trio.Event()
+            self.poll_index += 1
 
     async def should_cancel_work(self, request_id: int) -> bool:
         logging.info('should cancel work?')