---
title: thunder.cache_misses
description: Returns the number of cache misses we found when running the function.
canonical: >-
  https://lightning.ai/docs/thunder/stable/api-reference/generated/thunder.cache_misses
---
# thunder.cache_misses {#thunder-cache-misses}

### `thunder.cache_misses(fn)` {#thunder.cache_misses}

[\[source\]](https://github.com/Lightning-AI/lightning-thunder/blob/0.2.6/thunder/__init__.py#L991-L996)

Returns the number of cache misses we found when running the function.

Return type:

[`int`](https://docs.python.org/3/builtins/functions.html#int "(in Python v3.15)")

---

**Navigation**

- Parent: [Generated](/docs/thunder/0.2.6/api-reference/generated.md)