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Revert "Refactor kv_cache_scheme handling for quantization (#10132)" (#10935)

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This commit is contained in:
Yineng Zhang
2025-09-25 20:14:15 -07:00
committed by GitHub
parent 37158f2018
commit 172bcf0152
1 changed files with 10 additions and 31 deletions
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41
python/sglang/srt/layers/quantization/modelopt_quant.py
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@@ -140,21 +140,11 @@ class ModelOptFp8Config(QuantizationConfig):
# Flat format (config.json quantization_config)
# For kv_cache, check if kv_cache_scheme exists and extract algo
kv_cache_scheme = config.get("kv_cache_scheme")
kv_cache_type = None
kv_cache_bits = None
if isinstance(kv_cache_scheme, dict):
# Handles the expected format: {"type": "float", "num_bits": 8}
kv_cache_type = kv_cache_scheme.get("type")
kv_cache_bits = kv_cache_scheme.get("num_bits")
elif isinstance(kv_cache_scheme, str):
# Handles the shorthand format: "FP8"
if kv_cache_scheme.upper() == "FP8":
kv_cache_type = "float"
kv_cache_bits = 8
# Now, safely use the extracted values
if kv_cache_type == "float" and kv_cache_bits == 8:
if (
kv_cache_scheme
and kv_cache_scheme.get("type") == "float"
and kv_cache_scheme.get("num_bits") == 8
):
kv_cache_quant_method = "FP8"
# Map 'ignore' field to 'exclude_modules'
@@ -604,22 +594,11 @@ class ModelOptFp4Config(QuantizationConfig):
if not kv_cache_quant_algo:
# For config.json format, derive from kv_cache_scheme if available
kv_cache_scheme = config.get("kv_cache_scheme")
kv_cache_type = None
kv_cache_bits = None
if isinstance(kv_cache_scheme, dict):
# Handles the expected format: {"type": "float", "num_bits": 8}
kv_cache_type = kv_cache_scheme.get("type")
kv_cache_bits = kv_cache_scheme.get("num_bits")
elif isinstance(kv_cache_scheme, str):
# Handles the shorthand format: "FP8"
# We can infer the properties from the string.
if kv_cache_scheme.upper() == "FP8":
kv_cache_type = "float"
kv_cache_bits = 8
# Now, safely use the extracted values in the original logic
if kv_cache_type == "float" and kv_cache_bits == 8:
if (
kv_cache_scheme
and kv_cache_scheme.get("type") == "float"
and kv_cache_scheme.get("num_bits") == 8
):
kv_cache_quant_algo = "FP8"
else:
kv_cache_quant_algo = "auto"