Update ipu_config.json

ipu_config.json

@@ -14,6 +14,6 @@
     "executable_cache_dir": "./exe_cache",
   
     "ipus_per_replica": 4,
-    "layers_per_ipu": [9, 9, 9, 9],
+    "layers_per_ipu": [3, 10, 14, 9],
     "matmul_proportion": 0.3
   }