update

paddle/fluid/framework/parallel_executor.cc

@@ -166,7 +166,7 @@ void ParallelExecutor::BCastParamsToGPUs(
         void *buffer;
 
         if ((initializing && i == 0) ||
-            (!initializing && i == static_cast<size_t>(var_dev_id))) {
+            (!initializing && static_cast<int>(i) == var_dev_id)) {
           buffer = const_cast<void *>(main_tensor.data<void>());
         } else {
           auto local_scope = member_->local_scopes_[i];
@@ -187,7 +187,7 @@ void ParallelExecutor::BCastParamsToGPUs(
             platform::dynload::ncclBcast(buffers[i], numel, data_type, 0,
                                          nccl_ctx.comm_, nccl_ctx.stream());
           } else {
-            if (static_cast<size_t>(var_dev_id)) {
+            if (var_dev_id >= 0) {
               platform::dynload::ncclBcast(buffers[i], numel, data_type,
                                            var_dev_id, nccl_ctx.comm_,
                                            nccl_ctx.stream());