Summary:
A small model (<100MB) took about 20mins to load, and consume 16GB memory.
Strobelight profiling: https://fburl.com/strobelight/abwtz0ry
We realized that calc_line_start_offsets is culprit, and the line_starting_offsets_ is a vector of line numbers.
There are >20000 places we generate such ErrorReport, and the line number is ~100000.
So total memory cost is about 100000 x 20000 x 8 = ~16GB.
We propose to skip the error info for extreme large source file (>1MB). And keep an environment variable to keep the ability to print the source code info for large source file.
Test Plan:
buck run mode/opt-split-dwarf scripts/lufang:load_pt_model -- --model_file_path=/data/local/models/961746678/2/961746678_2.predictor.disagg.gpu.local
before the change, it takes 20mins to load, and the model costs 16GB memory (the model itself is only <100MB)
after the change, it takes 15s to load.
The most of the time / space is spent on calc_line_start_offsets, https://fburl.com/code/2to60zqu
Differential Revision: D47610805
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105608
Approved by: https://github.com/hl475
We want to make TorchRec sharded models TorchScriptable.
TorchRec sharded models uses generic types Awaitable[W] and LazyAwaitable[W] (https://github.com/pytorch/torchrec/blob/main/torchrec/distributed/types.py#L212).
In sharded model those types are used instead of contained type W, having the initialization function that produces object of type W.
At the moment when the first attribute of W is requested - `LazyAwaitable[W]` will call its initialization function (on the same stack), cache the result inside and work transparently as an object of W. So we can think about it as a delayed object initialization.
To support this behavior in TorchScript - we propose a new type to TorchScript - `Await`.
In eager mode it works the same as `LazyAwaitable[W]` in TorchRec, being dynamically typed - acting as a type `W` while it is `Await[W]`.
Within torchscript it is `Await[W]` and can be only explicitly converted to W, using special function `torch.jit.awaitable_wait(aw)`.
Creation of this `Await[W]` is done via another special function `torch.jit.awaitable(func, *args)`.
The semantic is close to `torch.jit.Future`, fork, wait and uses the same jit mechanics (inline fork Closures) with the difference that it does not start this function in parallel on fork. It only stores as a lambda inside IValue that will be called on the same thread when `torch.jit.awaitable_wait` is called.
For example (more examples in this PR `test/jit/test_await.py`)
```
def delayed(z: Tensor) -> Tensor:
return Tensor * 3
@torch.jit.script
def fn(x: Tensor):
aw: Await[int] = torch.jit._awaitable(delayed, 99)
a = torch.eye(2)
b = torch.jit._awaitable_wait(aw)
return a + b + x
```
Functions semantics:
`_awaitable(func -> Callable[Tuple[...], W], *args, **kwargs) -> Await[W]`
Creates Await object, owns args and kwargs. Once _awaitable_wait calls, executes function func and owns the result of the function. Following _awaitable_wait calls will return this result from the first function call.
`_awaitable_wait(Await[W]) -> W`
Returns either cached result of W if it is not the first _awaitable_wait call to this Await object or calls specified function if the first.
`_awaitable_nowait(W) -> Await[W]`
Creates trivial Await[W] wrapper on specified object To be type complaint for the corner cases.
Differential Revision: [D42502706](https://our.internmc.facebook.com/intern/diff/D42502706)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90863
Approved by: https://github.com/davidberard98
Not only is this change usually shorter and more readable, it also can yield better performance. size() is not always a constant time operation (such as on LinkedLists), but empty() always is.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93236
Approved by: https://github.com/malfet
As we live in C++17 world
This is a functional no-op, just
- `s/namespace at { namespace native {/namespace at::native {/`
- `s/namespace torch { namespace jit {/namespace torch::jit {/`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/92100
Approved by: https://github.com/izaitsevfb
Apply clang-tidy check modernize-use-emplace. This is slightly more efficient by using an inplace constructor and is the recommended style in parts of the codebase covered by clang-tidy. This just manually applies the check to rest of the codebase. Pinging @ezyang as this is related to my other PRs he reviewed like #89000
Pull Request resolved: https://github.com/pytorch/pytorch/pull/91077
Approved by: https://github.com/ezyang
Fixes https://github.com/pytorch/pytorch/issues/75464 Adds a context manager that will throw if the ops in the context are not fused.
API is :
```
with torch.jit.strict_fusion():
...
```
A few TODOs:
[+] Compose/figure out how to do with autodiff - right now it will run on autodiff as well
[+] Support all of the nvfuser operators that are added in guarding
[+] Figure out what to do with control flow that isn't taken (right now it will just error). this is probably a source of the original issue :/ - will just error
[+] (After those are figured out) add to docs
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75777
Approved by: https://github.com/davidberard98
Summary:
[Comment](https://github.com/pytorch/pytorch/pull/62445/files#r680132022) claims, it got added for consistency with top level CMakeLists.txt, but `-Wno-unused-variable` is not mentioned there.
Modify violations in 50+ files that were added in the interim by either removing unused variables, or decorating the code with `C10_UNUSED` if local variable is likely used to extend object lifetime until the end of the block.
Caused preventable revert in https://github.com/pytorch/pytorch/pull/72633#issuecomment-1092300787
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75538
Reviewed By: anjali411
Differential Revision: D35747333
Pulled By: malfet
fbshipit-source-id: 3fc5828e44a4c05ba0e89e92613e6ebbdb260626
(cherry picked from commit c179fba21cfa2a0093fad50ccad5a22dd7cff52c)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74785
Fix for https://github.com/facebookresearch/torchdynamo/issues/93
Because the constructor follow a non-standard input schema (variadic integers), they are handled specially in ir_emitter.
Test Plan: Imported from OSS
Reviewed By: ejguan
Differential Revision: D35362762
Pulled By: eellison
fbshipit-source-id: 960badf08ba2ab0818af5fd331aff3542051250f
(cherry picked from commit bd579dead5a5206fc6e5b535ecf4f99ae67ee135)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74768
As commented in code:
```
// Empty List Literals that are not assigned to variables
// may match to any list type in schema matching,
// but still default to List[Tensor] if assigned to a variable
// or returned from a function
// Restricting empty list matching to temporary values
// avoids difficult to handle cases such as
// a = []
// b = a
// if cond:
// b.append(2)
// else:
// a.append("hi")
// This is also the same behavior that C++ allows with {}
// (cannot assign to a variable typed as auto)
```
Fix for https://github.com/facebookresearch/torchdynamo/issues/95
Test Plan: Imported from OSS
Reviewed By: ejguan
Differential Revision: D35362760
Pulled By: eellison
fbshipit-source-id: da23e8889312001b60d64a1758da5c578b6fe5ea
(cherry picked from commit 75682f17204d6d444e7e7144472c6e833150c601)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72899
Reland D33282878 (911d527b87). This is the frontend change.
ghstack-source-id: 149204031
Test Plan: Refer to D33282878 (911d527b87). Also check CI
Reviewed By: gmagogsfm
Differential Revision: D34252127
fbshipit-source-id: 27b17ddd4d05d904eb91fd9ee094d9121f00e388
(cherry picked from commit 1d276baca3)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70471
Reland D33282878 (911d527b87). This is the frontend change.
ghstack-source-id: 149114933
Test Plan: Refer to D33282878 (911d527b87). Also check CI
Reviewed By: gmagogsfm
Differential Revision: D33342569
fbshipit-source-id: 57984ac67ae2c56c38f72d3b1fb69105901fb472
(cherry picked from commit b47cc935ee)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70339
When a python program is translated to TorchScript, the python exception type is dropped. This makes users's life hard when they need to categorize errors based more than only exception message.
Here we make the change so when we raise a python exception, we record the fully qualified class name for the exception. Later on when the TorchScript is interpreted, a special exception CustomJITException is thrown. User can get the python class name from CustomJITException::getPythonClassName .
Note that, this diff does not customize the mapping from C++ exception to Python exception. It's left to the users to do whatever mapping they want.
Code under scripts/shunting are just my own experimental code. I can split them out if requested.
ghstack-source-id: 146221879
Test Plan: buck test mode/opt //caffe2/test:jit
Reviewed By: gmagogsfm
Differential Revision: D33282878
fbshipit-source-id: 910f67a764519f1053a48589d1a34df69001525d
