Comments (4)
Glad that you were able to track the issue down.
There are two ways to use no_grad
with the rust bindings, either using no_grad
with a closure:
tch::no_grad(|| {
// gradients are not tracked here
});
Or using a no_grad_guard
, in this cases gradient are not tracked until the guard reaches the end of its scope and is dropped.
{
let guard = tch::no_grad_guard();
// gradients are not tracked here
}
from tch-rs.
Would you have a repro for this ?
I just pushed a small example to try to replicate your issue. When running on gpu mode, my gpu memory stays constant a bit below 500MB. This is large but I think caused by pytorch internal caching, anyway I don't see the memory increasing.
As per your other questions:
- The way to feed datasets depend a lot on how your dataset are structured. Reading files and then using
of_slice
should be reasonable. There are some helper functions in thevision
module to help with image datasets. - Deallocation should be automatic when reaching the scope end (which is one of rust big advantage).
- The memory consumption of
forward_t
depends a lot of what the model is doing. It can certainly double memory consumption and even more.
from tch-rs.
It turns out the overly large pre-fetch buffer exhausted the main memory. It's not tch's fault.
Besides, I find Torch forum suggests no_grad()
to disable gradient engine. It helps reducing memory footprint.
from tch-rs.
Thanks for your reply. The thread can be closed.
from tch-rs.
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