diff --git a/internlm/data/tokenized/dummy_dataset.py b/internlm/data/tokenized/dummy_dataset.py
index dcb6c027..1e64e00a 100644
--- a/internlm/data/tokenized/dummy_dataset.py
+++ b/internlm/data/tokenized/dummy_dataset.py
@@ -4,7 +4,7 @@
 import numpy as np
 from torch.utils.data import Dataset
 
-# from internlm.core.context.parallel_context import global_context as gpc
+from internlm.core.context.parallel_context import global_context as gpc
 
 
 class RandomDataset(Dataset):
@@ -30,7 +30,7 @@ def __init__(self, num_samples=10000, max_len=1024, fixed_seqlen: bool = False)
                 while len(d) < max_len:
                     r *= 2
                     d = list(range(n)) * r
-            # r = r % gpc.config.model.vocab_size
+            r = r % gpc.config.model.vocab_size
             d = [n, r] + d
             d = d[:max_len]
             data.append(d)
diff --git a/internlm/model/ops/ring_flash_attn/utils.py b/internlm/model/ops/ring_flash_attn/utils.py
index c15f074a..1875a903 100644
--- a/internlm/model/ops/ring_flash_attn/utils.py
+++ b/internlm/model/ops/ring_flash_attn/utils.py
@@ -1,11 +1,13 @@
 # Adapted from https://github.com/zhuzilin/ring-flash-attention/blob/main/ring_flash_attn/utils.py
 
+from functools import partial
 from typing import Optional, Tuple
 
 import torch
 import torch.distributed as dist
 import torch.nn.functional as F
 
+
 __all__ = ["update_out_and_lse", "RingComm"]
 
 
@@ -59,9 +61,11 @@ class RingComm:
     def __init__(self, process_group: dist.ProcessGroup):
         self._process_group = process_group
         self._ops = []
+        self._funcs = []
         self.rank = dist.get_rank(self._process_group)
         self.world_size = dist.get_world_size(self._process_group)
         self._reqs = None
+        self._handles = None
 
         self.send_rank = (self.rank + 1) % self.world_size
         self.recv_rank = (self.rank - 1) % self.world_size
@@ -69,29 +73,59 @@ def __init__(self, process_group: dist.ProcessGroup):
         if process_group is not None:
             self.send_rank = dist.get_global_rank(self._process_group, self.send_rank)
             self.recv_rank = dist.get_global_rank(self._process_group, self.recv_rank)
+            self.global_rank = dist.get_rank()
             # print(f'rank:{self.rank},send_rank:{self.send_rank},recv_rank:{self.recv_rank}')
 
     def send_recv(self, to_send: torch.Tensor, recv_tensor: Optional[torch.Tensor] = None) -> torch.Tensor:
+        if self.send_rank == self.recv_rank == self.global_rank:
+            return to_send
+
         if recv_tensor is None:
             res = torch.empty_like(to_send)
         else:
             res = recv_tensor
 
-        send_op = dist.P2POp(dist.isend, to_send, self.send_rank, group=self._process_group)
-        recv_op = dist.P2POp(dist.irecv, res, self.recv_rank, group=self._process_group)
-        self._ops.append(send_op)
-        self._ops.append(recv_op)
+        # send_op = dist.P2POp(dist.isend, to_send, self.send_rank, group=self._process_group)
+        # recv_op = dist.P2POp(dist.irecv, res, self.recv_rank, group=self._process_group)
+        # self._ops.append(send_op)
+        # self._ops.append(recv_op)
+
+        send_func = partial(dist.isend, tensor=to_send, dst=self.send_rank, group=self._process_group)
+        recv_func = partial(dist.irecv, tensor=res, src=self.recv_rank, group=self._process_group)
+
+        if self.rank % 2 == 0:
+            self._funcs.append(send_func)
+            self._funcs.append(recv_func)
+        else:
+            self._funcs.append(recv_func)
+            self._funcs.append(send_func)
+
         return res
 
     def commit(self):
-        if self._reqs is not None:
+        # if self._reqs is not None:
+        #     raise RuntimeError("commit called twice")
+        # self._reqs = dist.batch_isend_irecv(self._ops)
+
+        if self._handles is not None:
             raise RuntimeError("commit called twice")
-        self._reqs = dist.batch_isend_irecv(self._ops)
+        self._handles = []
+
+        for _func in self._funcs:
+            _handle = _func()
+            self._handles.append(_handle)
 
     def wait(self):
-        if self._reqs is None:
+        # if self._reqs is None:
+        #     raise RuntimeError("wait called before commit")
+        # for req in self._reqs:
+        #     req.wait()
+        # self._reqs = None
+        # self._ops = []
+
+        if self._handles is None:
             raise RuntimeError("wait called before commit")
-        for req in self._reqs:
-            req.wait()
-        self._reqs = None
-        self._ops = []
+        for _handle in self._handles:
+            _handle.wait()
+        self._handles = None
+        self._funcs = []