polish utils docstring (#620)

colossalai/utils/checkpointing.py

@@ -175,7 +175,7 @@ def load_checkpoint(checkpoint_path: str,
     If strict is True, then the keys of state_dict must exactly match the keys returned
     by this module’s state_dict() function.
 
-     Args:
+    Args:
         checkpoint_path (str): The exact and matched checkpoint_path directory to retrieve appropriate state_dict.
         model (:class:`torch.nn.Module`): Model to reload parameters and buffers.
         optimizer (Union[:class:`torch.optim.Optimizer`, :class:`colossalai.nn.optimizer`]): Optimizer to recuperate.

colossalai/utils/memory_tracer/async_memtracer.py

@@ -11,32 +11,31 @@ from colossalai.utils import get_current_device
 class AsyncMemoryMonitor:
     """
     An Async Memory Monitor runing during computing. Sampling memory usage of the current GPU
-    at interval of 1/(10**power) sec.
+    at interval of `1/(10**power)` sec.
 
     The idea comes from Runtime Memory Tracer of PatrickStar
-    PatrickStar: Parallel Training of Pre-trained Models via Chunk-based Memory Management
-    https://arxiv.org/abs/2108.05818
-    
-    :param power: the power of time interval, defaults to 10
-    :type power: int
+    `PatrickStar: Parallel Training of Pre-trained Models via Chunk-based Memory Management`_
 
-    Usage:
-    ::
+    Usage::
 
-        ```python
-            async_mem_monitor = AsyncMemoryMonitor()
-            input = torch.randn(2, 20).cuda()
-            OP1 = torch.nn.Linear(20, 30).cuda()
-            OP2 = torch.nn.Linear(30, 40).cuda()
+        async_mem_monitor = AsyncMemoryMonitor()
+        input = torch.randn(2, 20).cuda()
+        OP1 = torch.nn.Linear(20, 30).cuda()
+        OP2 = torch.nn.Linear(30, 40).cuda()
 
-            async_mem_monitor.start()
-            output = OP1(input)
-            async_mem_monitor.finish()
-            async_mem_monitor.start()
-            output = OP2(output)
-            async_mem_monitor.finish()
-            async_mem_monitor.save('log.pkl')
-        ```
+        async_mem_monitor.start()
+        output = OP1(input)
+        async_mem_monitor.finish()
+        async_mem_monitor.start()
+        output = OP2(output)
+        async_mem_monitor.finish()
+        async_mem_monitor.save('log.pkl')
+
+    Args:
+        power (int, optional): the power of time interva. Defaults to 10.
+
+    .. _PatrickStar\: Parallel Training of Pre-trained Models via Chunk-based Memory Management:
+        https://arxiv.org/abs/2108.05818
     """
 
     def __init__(self, power: int = 10):

colossalai/utils/profiler/mem_profiler.py

@@ -8,10 +8,12 @@ from colossalai.utils.profiler import BaseProfiler
 
 class MemProfiler(BaseProfiler):
     """Wraper of MemOpHook, used to show GPU memory usage through each iteration
-    
+
     To use this profiler, you need to pass an `engine` instance. And the usage is same like
     CommProfiler.
 
+    Usage::
+
         mm_prof = MemProfiler(engine)
         with ProfilerContext([mm_prof]) as prof:
             writer = SummaryWriter("mem")
@@ -36,15 +38,11 @@ class MemProfiler(BaseProfiler):
     def to_tensorboard(self, writer: SummaryWriter) -> None:
         stats = self._mem_tracer.async_mem_monitor.state_dict['mem_stats']
         for info, i in enumerate(stats):
-            writer.add_scalar(
-                "memory_usage/GPU",
-                info,
-                i
-            )
+            writer.add_scalar("memory_usage/GPU", info, i)
 
     def to_file(self, data_file: Path) -> None:
         self._mem_tracer.save_results(data_file)
 
     def show(self) -> None:
-        stats = self._mem_tracer.async_mem_monitor.state_dict['mem_stats'] 
+        stats = self._mem_tracer.async_mem_monitor.state_dict['mem_stats']
         print(stats)

colossalai/utils/profiler/prof_utils.py

@@ -70,29 +70,26 @@ class BaseProfiler(ABC):
 
 
 class ProfilerContext(object):
-    """
-    Profiler context manager
-    Usage:
-    ::
+    """Profiler context manager
 
-        ```python
-            world_size = 4
-            inputs = torch.randn(10, 10, dtype=torch.float32, device=get_current_device())
-            outputs = torch.empty(world_size, 10, 10, dtype=torch.float32, device=get_current_device())
-            outputs_list = list(torch.chunk(outputs, chunks=world_size, dim=0))
+    Usage::
 
-            cc_prof = CommProfiler()
+        world_size = 4
+        inputs = torch.randn(10, 10, dtype=torch.float32, device=get_current_device())
+        outputs = torch.empty(world_size, 10, 10, dtype=torch.float32, device=get_current_device())
+        outputs_list = list(torch.chunk(outputs, chunks=world_size, dim=0))
 
-            with ProfilerContext([cc_prof]) as prof:
-                op = dist.all_reduce(inputs, async_op=True)
-                dist.all_gather(outputs_list, inputs)
-                op.wait()
-                dist.reduce_scatter(inputs, outputs_list)
-                dist.broadcast(inputs, 0)
-                dist.reduce(inputs, 0)
+        cc_prof = CommProfiler()
 
-            prof.show()
-        ```
+        with ProfilerContext([cc_prof]) as prof:
+            op = dist.all_reduce(inputs, async_op=True)
+            dist.all_gather(outputs_list, inputs)
+            op.wait()
+            dist.reduce_scatter(inputs, outputs_list)
+            dist.broadcast(inputs, 0)
+            dist.reduce(inputs, 0)
+
+        prof.show()
     """
 
     def __init__(self, profilers: List[BaseProfiler] = None, enable: bool = True):