From 87f43814e3a026b6df603efdc309357543c52632 Mon Sep 17 00:00:00 2001
From: Nicolas Patry <patry.nicolas@protonmail.com>
Date: Thu, 5 Oct 2023 10:11:27 +0200
Subject: [PATCH] Fixing GPTQ exllama kernel usage. (#1101)

# What does this PR do?

Fixes #1098
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Fixes # (issue)


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---
 server/text_generation_server/utils/weights.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/server/text_generation_server/utils/weights.py b/server/text_generation_server/utils/weights.py
index 4bae8cc07bf..2f330d9c8fa 100644
--- a/server/text_generation_server/utils/weights.py
+++ b/server/text_generation_server/utils/weights.py
@@ -212,7 +212,9 @@ def get_multi_weights_col(self, prefixes: List[str], quantize: str, dim: int):
                 g_idx = None
 
             bits, groupsize = self._get_gptq_params()
-            weight = (qweight, qzeros, scales, g_idx, bits, groupsize, False)
+            from text_generation_server.utils.layers import HAS_EXLLAMA
+            use_exllama = bits==4  and HAS_EXLLAMA and quantize == "gptq"
+            weight = (qweight, qzeros, scales, g_idx, bits, groupsize, use_exllama)
         else:
             w = [self.get_sharded(f"{p}.weight", dim=0) for p in prefixes]
             weight = torch.cat(w, dim=dim)