Switch to punica-sgmv kernel from the Hub

This also switches (temporarily) to the tgi-nix/kernel-builder merge
branch, bumping up to CUDA 12.8 (same as non-Nix Torch).

Author: danieldk

flake.lock

@@ -5,7 +5,7 @@
       inputs.nixpkgs.follows = "tgi-nix/nixpkgs";
     };
     nix-filter.url = "github:numtide/nix-filter";
-    tgi-nix.url = "github:huggingface/text-generation-inference-nix/torch-2.7";
+    tgi-nix.url = "github:huggingface/text-generation-inference-nix/merge-with-kernel-builder";
     nixpkgs.follows = "tgi-nix/nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
     rust-overlay = {

flake.nix

@@ -31,7 +31,7 @@
   peft,
   pillow,
   prometheus-client,
-  punica-kernels,
+  punica-sgmv,
   py-cpuinfo,
   pydantic,
   quantization,
@@ -107,7 +107,7 @@ buildPythonPackage {
     peft
     pillow
     prometheus-client
-    punica-kernels
+    punica-sgmv
     py-cpuinfo
     pydantic
     quantization

nix/server.nix

@@ -3,7 +3,6 @@ include Makefile-flash-att-v2
 include Makefile-vllm
 include Makefile-awq
 include Makefile-selective-scan
-include Makefile-lorax-punica
 include Makefile-exllamav2
 include Makefile-flashinfer
 

server/Makefile

@@ -163,6 +163,64 @@
       }
     }
   },
+  {
+    "repo_id": "kernels-community/punica-sgmv",
+    "sha": "9ae1b469cb39c33df9ddd61657c6359acc423714",
+    "variants": {
+      "torch26-cxx11-cu118-x86_64-linux": {
+        "hash": "sha256-766062cd845bdebbe4e4391fda6f2663bebc2c110cbc2642d09c8c09ccf3f1d4",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx11-cu124-x86_64-linux": {
+        "hash": "sha256-c9cd76df7c84851aa566deb1c0d04ebddc1b1908a29df218344f2b3d53c4e683",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx11-cu126-aarch64-linux": {
+        "hash": "sha256-ae444bf53be3d469d4c9c58faef7d61a92e873e6104afe5aed2b2a1397333e99",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx11-cu126-x86_64-linux": {
+        "hash": "sha256-0706cc5ccf9cedae0bb6a938acdf2d5599a7b8f8b1fe46118b6ad61c0f3432af",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx98-cu118-x86_64-linux": {
+        "hash": "sha256-42cf390c6ae48b18041e201d4c67b4bf820b9f9cafe49a12c505f7920bae56ae",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx98-cu124-x86_64-linux": {
+        "hash": "sha256-75c97c23bfe32f65830341420d093a07df051828f385cbc5357b073c635f442f",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx98-cu126-aarch64-linux": {
+        "hash": "sha256-2ff5590ff6c298220c6e06142c971b08a686b98abb8d7dd1e6eb4539fa115cba",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch26-cxx98-cu126-x86_64-linux": {
+        "hash": "sha256-70bcf04490865df6518c9d6a4c7eb2fee76b14642651f04a061c20ffa6fdb283",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch27-cxx11-cu118-x86_64-linux": {
+        "hash": "sha256-727b8f5b22e4e91b956516235f26c39013a87ac6e196a0ce5f1897c2d959e69d",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch27-cxx11-cu126-aarch64-linux": {
+        "hash": "sha256-bfddd19db7c9268a83e3cc5e281b007de80ab0fe611b3856ffd1691b400eca46",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch27-cxx11-cu126-x86_64-linux": {
+        "hash": "sha256-940c68f5d4d8a2391b1eb3c7c5a56623428862f428aa5c6c1f7e62588c0e36fb",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch27-cxx11-cu128-aarch64-linux": {
+        "hash": "sha256-781259a371b67bfbf744431c88a6ee847ab48459e73cb57264590de2728d6b3a",
+        "hash_type": "git_lfs_concat"
+      },
+      "torch27-cxx11-cu128-x86_64-linux": {
+        "hash": "sha256-8977a33d7884bebb9fb5e3d7daf157119206f0f18a22edb2b96ec593d5c81ae1",
+        "hash_type": "git_lfs_concat"
+      }
+    }
+  },
   {
     "repo_id": "kernels-community/quantization",
     "sha": "6470f9b005797e00279eb9103463dfe0f8b7da00",
@@ -409,4 +467,4 @@
       }
     }
   }
-]
+]

server/Makefile-lorax-punica

@@ -58,6 +58,7 @@ build-backend = "setuptools.build_meta"
 [tool.kernels.dependencies]
 "kernels-community/paged-attention" = ">=0.0.2"
 "kernels-community/moe" = ">=0.1.1"
+"kernels-community/punica-sgmv" = ">=0.0.1"
 "kernels-community/quantization" = ">=0.0.3"
 "kernels-community/quantization-eetq" = ">=0.0.1"
 "kernels-community/rotary" = ">=0.0.1"

server/kernels.lock

@@ -13,21 +13,20 @@
 from text_generation_server.utils.log import log_master
 
 from text_generation_server.adapters.config import AdapterConfig, ModuleMap
-
+from text_generation_server.utils.import_utils import SYSTEM
+from text_generation_server.utils.kernels import load_kernel
 from text_generation_server.adapters.weights import (
     AdapterBatchMetadata,
     AdapterWeights,
     BatchAdapterWeights,
 )
-from text_generation_server.utils.sgmv import (
-    BGMV_MAX_RANK,
-    MAX_RANK_CUSTOM,
-    get_tmp_tensors,
-    orient_for_rank,
-    pad_rank,
-    use_cutlass_shrink,
-    has_sgmv,
-)
+
+if SYSTEM == "cuda":
+    punica_sgmv = load_kernel(
+        module="punica_sgmv", repo_id="kernels-community/punica-sgmv"
+    )
+else:
+    punica_sgmv = None
 
 
 def get_start_stop_idxs_for_rank(offset, size, rank, world_size):
@@ -129,11 +128,13 @@ def __init__(
         self.lora_a_r = weights_a[0].size(1) if len(weights_a) > 0 else 1
         self.lora_b_r = weights_b[0].size(0) if len(weights_a) > 0 else 1
 
-        self._use_cutlass_shrink = use_cutlass_shrink(self.lora_a_r)
+        self._use_cutlass_shrink = punica_sgmv.use_cutlass_shrink(self.lora_a_r)
         self._is_transposed = False
 
         # [num_layers, hidden_size, r]
-        weights_a = [orient_for_rank(w, w.size(1)).contiguous() for w in weights_a]
+        weights_a = [
+            punica_sgmv.orient_for_rank(w, w.size(1)).contiguous() for w in weights_a
+        ]
         self._weights_a = torch.stack(weights_a)
 
         # [num_layers, r, hidden_size]
@@ -244,8 +245,12 @@ def prepare_weights(
             lora_b_list[layer_id] = lora_b.transpose(0, 1) * scale
 
         # pad lora ranks to be compatible with sgmv
-        lora_a_list = [pad_rank(w, dim=1, world_size=world_size) for w in lora_a_list]
-        lora_b_list = [pad_rank(w, dim=0, world_size=world_size) for w in lora_b_list]
+        lora_a_list = [
+            punica_sgmv.pad_rank(w, dim=1, world_size=world_size) for w in lora_a_list
+        ]
+        lora_b_list = [
+            punica_sgmv.pad_rank(w, dim=0, world_size=world_size) for w in lora_b_list
+        ]
 
         if lora_a_list:
             # update rank if it was padded
@@ -293,7 +298,7 @@ def has_adapter(self, adapter_index: int) -> bool:
 
     def can_vectorize(self, pg: ProcessGroup) -> bool:
         return all(
-            rank_data.rank // pg.size() <= MAX_RANK_CUSTOM
+            rank_data.rank // pg.size() <= punica_sgmv.MAX_RANK_CUSTOM
             for rank_data in self.rank_data.values()
         )
 
@@ -337,8 +342,8 @@ def load(
         )
 
         use_sgmv = False
-        if prefill or max_rank > BGMV_MAX_RANK:
-            if has_sgmv():
+        if prefill or max_rank > punica_sgmv.BGMV_MAX_RANK:
+            if punica_sgmv is not None:
                 use_sgmv = True
             lora_a_ptr = torch.tensor(
                 [
@@ -425,7 +430,7 @@ def load(
 
             if use_sgmv:
                 lora_a_ptr_indices = lora_a_ptr[indices]
-                tmp_shrink, tmp_expand = get_tmp_tensors(
+                tmp_shrink, tmp_expand = punica_sgmv.get_tmp_tensors(
                     lora_a_ptr_indices.size(0), rank, device
                 )
                 segment_starts = meta.adapter_segments[indices]

server/pyproject.toml

@@ -5,14 +5,16 @@
 from torch import nn
 from torch.distributed import ProcessGroup
 
-from text_generation_server.utils.sgmv import (
-    add_lora_a_bgmv,
-    add_lora_b_bgmv,
-    has_sgmv,
-    lora_a_sgmv_cutlass,
-    lora_b_sgmv_cutlass,
-    orient_for_rank,
-)
+from text_generation_server.utils.import_utils import SYSTEM
+from text_generation_server.utils.kernels import load_kernel
+
+if SYSTEM == "cuda":
+    punica_sgmv = load_kernel(
+        module="punica_sgmv", repo_id="kernels-community/punica-sgmv"
+    )
+else:
+    punica_sgmv = None
+
 
 if TYPE_CHECKING:
     from text_generation_server.adapters import AdapterBatchData
@@ -41,7 +43,11 @@ def forward_layer_type(
             return result
         data: Optional["BatchLoraWeights"] = adapter_data.data.get(layer_type)
 
-        if has_sgmv() and data is not None and data.can_vectorize(self.process_group):
+        if (
+            punica_sgmv is not None
+            and data is not None
+            and data.can_vectorize(self.process_group)
+        ):
             # In tensor-parallel configurations, each GPU processes a specific segment of the output.
             # The 'result' tensor represents the full output, which can vary in size based on
             # the layer type (e.g., attention vs. feed-forward layers). We define the current
@@ -68,7 +74,7 @@ def forward_layer_type(
 
                 if data.use_sgmv:
                     # Use SGMV for prefill
-                    v = lora_a_sgmv_cutlass(
+                    v = punica_sgmv.lora_a_sgmv_cutlass(
                         input,
                         rank_segments.tmp_shrink,
                         lora_a_ptr,
@@ -81,7 +87,7 @@ def forward_layer_type(
                     if self.process_group.size() > 1:
                         v = self.collect_lora_a(v)
 
-                    lora_b_sgmv_cutlass(
+                    punica_sgmv.lora_b_sgmv_cutlass(
                         proj,
                         v,
                         rank_segments.tmp_expand,
@@ -96,7 +102,7 @@ def forward_layer_type(
                         (input.size(0), r), dtype=input.dtype, device=input.device
                     )
                     # TODO: error with [-1, 0], but not [0, -1]
-                    add_lora_a_bgmv(
+                    punica_sgmv.add_lora_a_bgmv(
                         v,
                         input,
                         lora_a_ptr,
@@ -107,7 +113,7 @@ def forward_layer_type(
                     if self.process_group.size() > 1:
                         v = self.collect_lora_a(v)
 
-                    add_lora_b_bgmv(
+                    punica_sgmv.add_lora_b_bgmv(
                         proj,
                         v,
                         lora_b_ptr,
@@ -142,7 +148,7 @@ def forward_lora(
         lora_a = data.lora_a[adapter_index][self.layer_id, :, :]
         lora_b = data.lora_b[adapter_index][self.layer_id, :, :]
 
-        lora_a = orient_for_rank(lora_a, lora_b.size(0))
+        lora_a = punica_sgmv.orient_for_rank(lora_a, lora_b.size(0))
 
         a_out = input @ lora_a
         if self.process_group.size() > 1: