GitLab

* hard-code alibi in fwd

* use params.h as hun_heads

* hard-code alibi in bwd

* add alibi on/off option

* compute alibi_start, ratio outside of kernels

* fix minor merge conflict

* add test_alibi.py

* change apply_alibi() location before masking

* add alibi in splitkv kernel

* fix backward func # of returns

* add out-of-bound check in apply_alibi()

* update test_alibi.py

* update test_alibi.py for kvcache

* simplify alibi parameter interface

* fix performance issue
by computing alibi outside of branch

* update test_flash_attn_varlen_func() for left padding

* implement alibi_slopes (b, nh) loading

* optimize apply_alibi() a bit

* update test cases for alibi_slopes loading

* reflect stylistic comments

* disable "seqlenq_ngroups_swapped" when using alibi

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Co-authored-by: monk.detective <monk.detective@kakaobrain.com>

Co-authored-by: Timothee Lacroix <t@mistral.ai>

Support flash attention 2 with causal masking when KV's seq length is longer than Q's seq length. (#436)

* Add RNG state to kernel launch params
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Save seed and offset for backward
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Single thread write to global mem
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* compute_dq_dk_dv_1colblock get seed and offset from launch params
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* compute_dq_dk_dv_1rowblock get seed and offset from launch params
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Change forward c++ APIs to save RNG state for backward
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Change backward c++ APIs to set RNG state for bprop launcher
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Bug fixes
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Python side API changes
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Bug fix; only save seeds instead of full offset
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

* Account for 3D grid size
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

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Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>