[v0.18.0][Triton][Qwen3.5] delete expr for kernels args (#7646)

### What this PR does / why we need it?
Some parameters of Triton operators are unnecessarily modified with the
"constexpr" modifier. When these parameters change, recompilation is
triggered, which significantly affects the model performance. Therefore,
these parameters need to be rectified.
backport: https://github.com/vllm-project/vllm-ascend/pull/7482


Signed-off-by: w30012745 <wangxiaoshuai2@h-partners.com>
Co-authored-by: w30012745 <wangxiaoshuai2@h-partners.com>

vllm_ascend/ops/triton/fla/chunk_o.py

@@ -22,7 +22,7 @@ from .utils import prepare_chunk_offsets, safe_exp
         "IS_VARLEN": lambda args: args["cu_seqlens"] is not None,
     }
 )
-@triton.jit(do_not_specialize=["T"])
+@triton.jit(do_not_specialize=["chunk_offsets", "scale", "T", "H", "Hg", "K", "V"])
 def chunk_fwd_kernel_o(
     q,
     k,
@@ -34,10 +34,10 @@ def chunk_fwd_kernel_o(
     chunk_offsets,
     scale,
     T,
-    H: tl.constexpr,
-    Hg: tl.constexpr,
-    K: tl.constexpr,
-    V: tl.constexpr,
+    H,
+    Hg,
+    K,
+    V,
     BT: tl.constexpr,
     BK: tl.constexpr,
     BV: tl.constexpr,

vllm_ascend/ops/triton/fla/l2norm.py

@@ -14,8 +14,8 @@ from vllm.triton_utils import tl, triton
 from vllm_ascend.ops.triton.triton_utils import get_vectorcore_num
 
 
-@triton.jit
-def l2norm_fwd_kernel2_loop(X, Y, eps, M, N: tl.constexpr, MBLOCK: tl.constexpr, NUM_CHUNKS: tl.constexpr):
+@triton.jit(do_not_specialize=["eps", "M", "NUM_CHUNKS"])
+def l2norm_fwd_kernel2_loop(X, Y, eps, M, N: tl.constexpr, MBLOCK: tl.constexpr, NUM_CHUNKS):
     base_row = tl.program_id(0) * (NUM_CHUNKS * MBLOCK)
     rindex = tl.arange(0, N)[None, :]
 

vllm_ascend/ops/triton/fla/wy_fast.py

@@ -17,7 +17,7 @@ from .utils import prepare_chunk_indices
 
 
 @triton.heuristics({"IS_VARLEN": lambda args: args["cu_seqlens"] is not None})
-@triton.jit(do_not_specialize=["T"])
+@triton.jit(do_not_specialize=["T", "H", "Hg", "K", "V"])
 def recompute_w_u_fwd_kernel(
     k,
     v,
@@ -29,10 +29,10 @@ def recompute_w_u_fwd_kernel(
     cu_seqlens,
     chunk_indices,
     T,
-    H: tl.constexpr,
-    Hg: tl.constexpr,
-    K: tl.constexpr,
-    V: tl.constexpr,
+    H,
+    Hg,
+    K,
+    V,
     BT: tl.constexpr,
     BK: tl.constexpr,
     BV: tl.constexpr,