added quadratic sampling (#56)

* added quadratic sampling

* Update sample_preset.yml

* oops missed a spot

* Sampling: Fix smoothing factor semantics

backends/exllamav2/model.py

@@ -523,6 +523,14 @@ def check_unsupported_settings(self, **kwargs):
                 "installed ExLlamaV2 version."
             )
 
+        if (unwrap(kwargs.get("smoothing_factor"), 0.0)) > 0.0 and not hasattr(
+            ExLlamaV2Sampler.Settings, "smoothing_factor"
+        ):
+            logger.warning(
+                "Smoothing factor is not supported by the currently "
+                "installed ExLlamaV2 version."
+            )
+
     def generate(self, prompt: str, **kwargs):
         """Generate a response to a prompt"""
         generation = list(self.generate_gen(prompt, **kwargs))
@@ -593,6 +601,7 @@ def generate_gen(self, prompt: str, **kwargs):
         # Apply settings
         gen_settings.temperature = unwrap(kwargs.get("temperature"), 1.0)
         gen_settings.temperature_last = unwrap(kwargs.get("temperature_last"), False)
+        gen_settings.smoothing_factor = unwrap(kwargs.get("smoothing_factor"), 0.0)
         gen_settings.top_k = unwrap(kwargs.get("top_k"), 0)
         gen_settings.top_p = unwrap(kwargs.get("top_p"), 1.0)
         gen_settings.top_a = unwrap(kwargs.get("top_a"), 0.0)

common/sampling.py

@@ -56,6 +56,10 @@ class SamplerParams(BaseModel):
         examples=[1.0],
     )
 
+    smoothing_factor: Optional[float] = Field(
+        default_factor=lambda: get_default_sampler_value("smoothing_factor", 0.0),
+    )
+
     top_k: Optional[int] = Field(
         default_factory=lambda: get_default_sampler_value("top_k", 0)
     )
@@ -173,6 +177,7 @@ def to_gen_params(self):
             "min_temp": self.min_temp,
             "max_temp": self.max_temp,
             "temp_exponent": self.temp_exponent,
+            "smoothing_factor": self.smoothing_factor,
             "top_k": self.top_k,
             "top_p": self.top_p,
             "top_a": self.top_a,

sampler_overrides/sample_preset.yml

@@ -39,6 +39,9 @@ max_temp:
 temp_exponent:
   override: 0.0
   force: false
+smoothing_factor:
+  override: 0.0
+  force: false
 
 # MARK: Alphabet soup
 top_k: