feat: config files and SSE (#83)

Signed-off-by: mudler <mudler@mocaccino.org>
Signed-off-by: Tyler Gillson <tyler.gillson@gmail.com>
Co-authored-by: Tyler Gillson <tyler.gillson@gmail.com>

api/prediction.go

@@ -0,0 +1,188 @@
+package api
+
+import (
+	"fmt"
+	"sync"
+
+	model "github.com/go-skynet/LocalAI/pkg/model"
+	gpt2 "github.com/go-skynet/go-gpt2.cpp"
+	gptj "github.com/go-skynet/go-gpt4all-j.cpp"
+	llama "github.com/go-skynet/go-llama.cpp"
+)
+
+// mutex still needed, see: https://github.com/ggerganov/llama.cpp/discussions/784
+var mutexMap sync.Mutex
+var mutexes map[string]*sync.Mutex = make(map[string]*sync.Mutex)
+
+func ModelInference(s string, loader *model.ModelLoader, c Config) (func() (string, error), error) {
+	var model *llama.LLama
+	var gptModel *gptj.GPTJ
+	var gpt2Model *gpt2.GPT2
+	var stableLMModel *gpt2.StableLM
+
+	modelFile := c.Model
+
+	// Try to load the model
+	var llamaerr, gpt2err, gptjerr, stableerr error
+	llamaOpts := []llama.ModelOption{}
+	if c.ContextSize != 0 {
+		llamaOpts = append(llamaOpts, llama.SetContext(c.ContextSize))
+	}
+	if c.F16 {
+		llamaOpts = append(llamaOpts, llama.EnableF16Memory)
+	}
+
+	// TODO: this is ugly, better identifying the model somehow! however, it is a good stab for a first implementation..
+	model, llamaerr = loader.LoadLLaMAModel(modelFile, llamaOpts...)
+	if llamaerr != nil {
+		gptModel, gptjerr = loader.LoadGPTJModel(modelFile)
+		if gptjerr != nil {
+			gpt2Model, gpt2err = loader.LoadGPT2Model(modelFile)
+			if gpt2err != nil {
+				stableLMModel, stableerr = loader.LoadStableLMModel(modelFile)
+				if stableerr != nil {
+					return nil, fmt.Errorf("llama: %s gpt: %s gpt2: %s stableLM: %s", llamaerr.Error(), gptjerr.Error(), gpt2err.Error(), stableerr.Error()) // llama failed first, so we want to catch both errors
+				}
+			}
+		}
+	}
+
+	var fn func() (string, error)
+
+	switch {
+	case stableLMModel != nil:
+		fn = func() (string, error) {
+			// Generate the prediction using the language model
+			predictOptions := []gpt2.PredictOption{
+				gpt2.SetTemperature(c.Temperature),
+				gpt2.SetTopP(c.TopP),
+				gpt2.SetTopK(c.TopK),
+				gpt2.SetTokens(c.Maxtokens),
+				gpt2.SetThreads(c.Threads),
+			}
+
+			if c.Batch != 0 {
+				predictOptions = append(predictOptions, gpt2.SetBatch(c.Batch))
+			}
+
+			if c.Seed != 0 {
+				predictOptions = append(predictOptions, gpt2.SetSeed(c.Seed))
+			}
+
+			return stableLMModel.Predict(
+				s,
+				predictOptions...,
+			)
+		}
+	case gpt2Model != nil:
+		fn = func() (string, error) {
+			// Generate the prediction using the language model
+			predictOptions := []gpt2.PredictOption{
+				gpt2.SetTemperature(c.Temperature),
+				gpt2.SetTopP(c.TopP),
+				gpt2.SetTopK(c.TopK),
+				gpt2.SetTokens(c.Maxtokens),
+				gpt2.SetThreads(c.Threads),
+			}
+
+			if c.Batch != 0 {
+				predictOptions = append(predictOptions, gpt2.SetBatch(c.Batch))
+			}
+
+			if c.Seed != 0 {
+				predictOptions = append(predictOptions, gpt2.SetSeed(c.Seed))
+			}
+
+			return gpt2Model.Predict(
+				s,
+				predictOptions...,
+			)
+		}
+	case gptModel != nil:
+		fn = func() (string, error) {
+			// Generate the prediction using the language model
+			predictOptions := []gptj.PredictOption{
+				gptj.SetTemperature(c.Temperature),
+				gptj.SetTopP(c.TopP),
+				gptj.SetTopK(c.TopK),
+				gptj.SetTokens(c.Maxtokens),
+				gptj.SetThreads(c.Threads),
+			}
+
+			if c.Batch != 0 {
+				predictOptions = append(predictOptions, gptj.SetBatch(c.Batch))
+			}
+
+			if c.Seed != 0 {
+				predictOptions = append(predictOptions, gptj.SetSeed(c.Seed))
+			}
+
+			return gptModel.Predict(
+				s,
+				predictOptions...,
+			)
+		}
+	case model != nil:
+		fn = func() (string, error) {
+			// Generate the prediction using the language model
+			predictOptions := []llama.PredictOption{
+				llama.SetTemperature(c.Temperature),
+				llama.SetTopP(c.TopP),
+				llama.SetTopK(c.TopK),
+				llama.SetTokens(c.Maxtokens),
+				llama.SetThreads(c.Threads),
+			}
+
+			if c.Debug {
+				predictOptions = append(predictOptions, llama.Debug)
+			}
+
+			predictOptions = append(predictOptions, llama.SetStopWords(c.StopWords...))
+
+			if c.RepeatPenalty != 0 {
+				predictOptions = append(predictOptions, llama.SetPenalty(c.RepeatPenalty))
+			}
+
+			if c.Keep != 0 {
+				predictOptions = append(predictOptions, llama.SetNKeep(c.Keep))
+			}
+
+			if c.Batch != 0 {
+				predictOptions = append(predictOptions, llama.SetBatch(c.Batch))
+			}
+
+			if c.F16 {
+				predictOptions = append(predictOptions, llama.EnableF16KV)
+			}
+
+			if c.IgnoreEOS {
+				predictOptions = append(predictOptions, llama.IgnoreEOS)
+			}
+
+			if c.Seed != 0 {
+				predictOptions = append(predictOptions, llama.SetSeed(c.Seed))
+			}
+
+			return model.Predict(
+				s,
+				predictOptions...,
+			)
+		}
+	}
+
+	return func() (string, error) {
+		// This is still needed, see: https://github.com/ggerganov/llama.cpp/discussions/784
+		mutexMap.Lock()
+		l, ok := mutexes[modelFile]
+		if !ok {
+			m := &sync.Mutex{}
+			mutexes[modelFile] = m
+			l = m
+		}
+		mutexMap.Unlock()
+		l.Lock()
+		defer l.Unlock()
+
+		return fn()
+	}, nil
+}