[FAW] remove code related to chunk (#1501)

colossalai/nn/parallel/layers/cache_embedding/cache_mgr.py

@@ -56,7 +56,6 @@ class CachedParamMgr(torch.nn.Module):
         self.num_hits_history = []
         self.num_miss_history = []
         self.num_write_back_history = []
-        self.input_id_percent_in_load_chunk = []
         self._reset_comm_stats()
 
         self._evict_strategy = evict_strategy
@@ -156,23 +155,23 @@ class CachedParamMgr(torch.nn.Module):
             # self.cuda_cached_weight = self.weight
             raise NotImplementedError()
 
-    def cpu_weight_data(self, chunk_id: int) -> torch.Tensor:
+    def cpu_weight_data(self, row_idx: int) -> torch.Tensor:
         """
-        access a chunk of CPU weight.
+        access a row of CPU weight.
 
         Args:
-            chunk_id (int): chunk id
+            row_idx (int): the idx of rows
 
         Returns:
-            torch.Tensor: a piece of memory in CPU weight corresponding to chunk id's payload. The tensor is 1-D.
+            torch.Tensor: a piece of memory in CPU weight corresponding to row id's payload. The tensor is 1-D.
         """
 
         return self.weight.data.view(-1).narrow(0,
-                                                int(chunk_id) * self.embedding_dim,
+                                                int(row_idx) * self.embedding_dim,
                                                 self.embedding_dim).view(1, self.embedding_dim)
 
     @property
-    def cuda_available_chunk_num(self):
+    def cuda_available_row_num(self):
         return self._cuda_available_row_num
 
     @torch.no_grad()
@@ -202,7 +201,7 @@ class CachedParamMgr(torch.nn.Module):
         preload_row_num = min(int(np.ceil(self.cuda_row_num * warmup_ratio)), self.num_embeddings)
         if preload_row_num > 0:
             with Timer() as timer:
-                # extract chunks from cpu weight
+                # extract rows from cpu weight
                 preload_row_ids = torch.arange(preload_row_num)
                 preload_slot_ids = preload_row_ids.cuda()
 
@@ -213,8 +212,8 @@ class CachedParamMgr(torch.nn.Module):
                                                             src=self.weight.view(self.num_embeddings, -1),
                                                             tgt=self.cuda_cached_weight.view(self.cuda_row_num, -1))
                 else:
-                    preload_chunks = self.weight.view(self.num_embeddings, -1).index_select(0, preload_row_ids).cuda()
-                    self.cuda_cached_weight.view(self.cuda_row_num, -1).index_copy_(0, preload_slot_ids, preload_chunks)
+                    preload_rows = self.weight.view(self.num_embeddings, -1).index_select(0, preload_row_ids).cuda()
+                    self.cuda_cached_weight.view(self.cuda_row_num, -1).index_copy_(0, preload_slot_ids, preload_rows)
 
                 # update auxiliary info
                 slot_offsets = preload_slot_ids
@@ -224,15 +223,15 @@ class CachedParamMgr(torch.nn.Module):
             print(f'Cache warmup finished cost {timer.elapsed} sec.')
 
     def flush(self):
-        """flush all CUDA chunks to CPU.
+        """flush all CUDA rows to CPU.
         The function is usually called after training finished.
         """
         slots = torch.nonzero(self.cached_idx_map > -1).squeeze(1)
-        chunk_ids = self.cached_idx_map[slots]
-        chunks = self.cuda_cached_weight.view(self.cuda_row_num, -1).index_select(0, slots).cpu()
-        self.weight.view(self.num_embeddings, -1).index_copy_(0, chunk_ids.cpu(), chunks)
+        row_ids = self.cached_idx_map[slots]
+        rows = self.cuda_cached_weight.view(self.cuda_row_num, -1).index_select(0, slots).cpu()
+        self.weight.view(self.num_embeddings, -1).index_copy_(0, row_ids.cpu(), rows)
         self.cached_idx_map.index_fill_(0, slots, -1)
-        self.inverted_cached_idx.index_fill_(0, chunk_ids, -1)
+        self.inverted_cached_idx.index_fill_(0, row_ids, -1)
         self._cuda_available_row_num += slots.numel()
 
         assert self._cuda_available_row_num == self.cuda_row_num
@@ -280,25 +279,25 @@ class CachedParamMgr(torch.nn.Module):
             cpu_row_idxs = torch.unique(cpu_row_idxs_original)
 
             assert len(cpu_row_idxs) <= self.cuda_row_num, \
-                f"the input indices pull {len(cpu_row_idxs)} chunks, " \
-                f"which is larger than the presented {self.cuda_row_num}, " \
-                f"please increase cuda_row_num  shrink batch size"
+                f"You move {len(cpu_row_idxs)} embedding rows from CPU to CUDA. " \
+                f"It is larger than the capacity of the cache, which at most contains {self.cuda_row_num} rows, " \
+                f"Please increase cuda_row_num or decrease the training batch size."
             self.evict_backlist = cpu_row_idxs
 
-        with record_function("(zhg) get cpu chunk indices"):
+        with record_function("(zhg) get cpu row idxs"):
             comm_cpu_row_idxs = cpu_row_idxs[torch.isin(cpu_row_idxs, self.cached_idx_map, invert=True)]
 
         self.num_hits_history.append(len(cpu_row_idxs) - len(comm_cpu_row_idxs))
         self.num_miss_history.append(len(comm_cpu_row_idxs))
         self.num_write_back_history.append(0)
 
-        # move sure the cuda chunk will not be evicted!
+        # move sure the cuda rows will not be evicted!
         with record_function("(zhg) cache update"):
             self._prepare_rows_on_cuda(comm_cpu_row_idxs)
 
         self.evict_backlist = torch.tensor([], device=cpu_row_idxs.device, dtype=cpu_row_idxs.dtype)
-        # new ids chunk_offset + offset_in_chunk
-        with record_function("(zhg) embed idx -> cache chunk id"):
+
+        with record_function("(zhg) embed cpu rows idx -> cache gpu row idxs"):
             gpu_row_idxs = self._id_to_cached_cuda_id(ids)
 
         # update for LFU.
@@ -311,17 +310,17 @@ class CachedParamMgr(torch.nn.Module):
         self._cuda_to_cpu_elapse = 0
         self._cuda_to_cpu_numel = 0
 
-    def _chunk_in_cuda(self, chunk_id: int) -> bool:
-        return self.inverted_cached_idx[chunk_id] != -1
+    def _row_in_cuda(self, row_id: int) -> bool:
+        return self.inverted_cached_idx[row_id] != -1
 
     @torch.no_grad()
     def _prepare_rows_on_cuda(self, cpu_row_idxs: torch.Tensor) -> None:
         """prepare rows in cpu_row_idxs on CUDA memory
 
         Args:
-            cpu_row_idxs (torch.Tensor): the chunks to be placed on CUDA
+            cpu_row_idxs (torch.Tensor): the rows to be placed on CUDA
         """
-        evict_num = cpu_row_idxs.numel() - self.cuda_available_chunk_num
+        evict_num = cpu_row_idxs.numel() - self.cuda_available_row_num
         if evict_num > 0:
             with Timer() as timer:
                 mask_cpu_row_idx = torch.isin(self.cached_idx_map, self.evict_backlist)
@@ -396,7 +395,7 @@ class CachedParamMgr(torch.nn.Module):
         """
         deprecated
 
-        evict one chunk from cuda to cpu.
+        evict one row from cuda to cpu.
         Returns: 
         (int) : the slot id be evicted.
         """

colossalai/nn/parallel/layers/cache_embedding/freq_aware_embedding.py

@@ -119,8 +119,4 @@ class FreqAwareEmbeddingBag(BaseEmbeddingBag):
         if self.cache_weight_mgr._cuda_to_cpu_numel > 0:
             return self.cache_weight_mgr._cuda_to_cpu_numel * self.cache_weight_mgr.elem_size_in_byte / 1e6 / \
                    self.cache_weight_mgr._cuda_to_cpu_elapse
-        return 0
-
-    @property
-    def input_id_percent_in_load_chunk(self):
-        return 0    # np.mean(self.cache_weight_mgr.input_id_percent_in_load_chunk) * 100
+        return 0
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