[ET-VK][LlaMa] Split SDPA + KV cache operator into SDPA operator and KV cache update operator #8068
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…KV cache update operator ## Context #7413 and #7412 split the `sdpa_with_kv_cache` operator into two separate operators, `update_cache` and `custom_sdpa` to decouple the cache update step from the actual SDPA computation. As a result, SDPA is no longer being delegated on Vulkan because of this interface change. To rectify this, Vulkan must also split `sdpa_with_kv_cache` into two operators. Note that during this diff the new operators are not partitioned yet because of complications caused by assertion ops in the graph. The next diff adds a pass to remove such assertion ops which allows the new operators to be partitioned. Differential Revision: [D68919676](https://our.internmc.facebook.com/intern/diff/D68919676/) [ghstack-poisoned]
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/8068
Note: Links to docs will display an error until the docs builds have been completed. ❌ 1 New Failure, 1 PendingAs of commit 2271103 with merge base afc5a50 ( NEW FAILURE - The following job has failed:
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…KV cache update operator ## Context #7413 and #7412 split the `sdpa_with_kv_cache` operator into two separate operators, `update_cache` and `custom_sdpa` to decouple the cache update step from the actual SDPA computation. As a result, SDPA is no longer being delegated on Vulkan because of this interface change. To rectify this, Vulkan must also split `sdpa_with_kv_cache` into two operators. Note that during this diff the new operators are not partitioned yet because of complications caused by assertion ops in the graph. The next diff adds a pass to remove such assertion ops which allows the new operators to be partitioned. Differential Revision: [D68919676](https://our.internmc.facebook.com/intern/diff/D68919676/) ghstack-source-id: 263930059 Pull Request resolved: #8068
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…KV cache update operator + Add `RemoveAsserts` pass and apply it during LlaMa export **Note**: This diff is a combination of D68919676 (#8068) and D68919678 (no pull request). I decided to combine the two because of problems with `ghexport`, which was having some problems exporting the second diff, as well as the fact that both diffs are needed for `export_llama` to work so it makes more sense to just have a single diff. ## Context #7413 and #7412 split the `sdpa_with_kv_cache` operator into two separate operators, `update_cache` and `custom_sdpa` to decouple the cache update step from the actual SDPA computation. As a result, SDPA is no longer being delegated on Vulkan because of this interface change. To rectify this, Vulkan must also split `sdpa_with_kv_cache` into two operators. Note that during this diff the new operators are not partitioned yet because of complications caused by assertion ops in the graph. The next diff adds a pass to remove such assertion ops which allows the new operators to be partitioned. ## Context Recently, some assertion ops were added to the Llama source code. Unfortunately, this causes issues for the Vulkan delegate because runtime assertions are not yet supported in Vulkan and the assertion ops cause graph breaks due to not being supported. To prevent graph breaks when delegating to Vulkan, apply a pass to remove assertion ops during the llama export. Differential Revision: [D68922404](https://our.internmc.facebook.com/intern/diff/D68922404/) [ghstack-poisoned]
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Stack from ghstack (oldest at bottom):
Context
#7413 and #7412 split the
sdpa_with_kv_cacheoperator into two separate operators,update_cacheandcustom_sdpato decouple the cache update step from the actual SDPA computation.As a result, SDPA is no longer being delegated on Vulkan because of this interface change. To rectify this, Vulkan must also split
sdpa_with_kv_cacheinto two operators.Note that during this diff the new operators are not partitioned yet because of complications caused by assertion ops in the graph. The next diff adds a pass to remove such assertion ops which allows the new operators to be partitioned.
Differential Revision: D68919676