feat: allow to set a prompt cache path and enable saving state (#395)

Signed-off-by: mudler <mudler@mocaccino.org>

Makefile

@@ -3,7 +3,7 @@ GOTEST=$(GOCMD) test
 GOVET=$(GOCMD) vet
 BINARY_NAME=local-ai
 
-GOLLAMA_VERSION?=8bd97d532e90cf34e755b3ea2d8aa17000443cf2
+GOLLAMA_VERSION?=fbec625895ba0c458f783b62c8569135c5e80d79
 GPT4ALL_REPO?=https://github.com/nomic-ai/gpt4all
 GPT4ALL_VERSION?=73db20ba85fbbdc66a56e2619394c0eea40dc72b
 GOGGMLTRANSFORMERS_VERSION?=c4c581f1853cf1b66276501c7c0dbea1e3e564b7

api/config.go

@@ -34,6 +34,10 @@ type Config struct {
 	Mirostat              int               `yaml:"mirostat"`
 	NGPULayers            int               `yaml:"gpu_layers"`
 	ImageGenerationAssets string            `yaml:"asset_dir"`
+
+	PromptCachePath string `yaml:"prompt_cache_path"`
+	PromptCacheAll  bool   `yaml:"prompt_cache_all"`
+
 	PromptStrings, InputStrings []string
 	InputToken                  [][]int
 }

api/prediction.go

@@ -2,6 +2,8 @@ package api
 
 import (
 	"fmt"
+	"os"
+	"path/filepath"
 	"regexp"
 	"strings"
 	"sync"
@@ -102,7 +104,7 @@ func ModelEmbedding(s string, tokens []int, loader *model.ModelLoader, c Config)
 	switch model := inferenceModel.(type) {
 	case *llama.LLama:
 		fn = func() ([]float32, error) {
-			predictOptions := buildLLamaPredictOptions(c)
+			predictOptions := buildLLamaPredictOptions(c, loader.ModelPath)
 			if len(tokens) > 0 {
 				return model.TokenEmbeddings(tokens, predictOptions...)
 			}
@@ -151,7 +153,7 @@ func ModelEmbedding(s string, tokens []int, loader *model.ModelLoader, c Config)
 	}, nil
 }
 
-func buildLLamaPredictOptions(c Config) []llama.PredictOption {
+func buildLLamaPredictOptions(c Config, modelPath string) []llama.PredictOption {
 	// Generate the prediction using the language model
 	predictOptions := []llama.PredictOption{
 		llama.SetTemperature(c.Temperature),
@@ -161,6 +163,17 @@ func buildLLamaPredictOptions(c Config) []llama.PredictOption {
 		llama.SetThreads(c.Threads),
 	}
 
+	if c.PromptCacheAll {
+		predictOptions = append(predictOptions, llama.EnablePromptCacheAll)
+	}
+
+	if c.PromptCachePath != "" {
+		// Create parent directory
+		p := filepath.Join(modelPath, c.PromptCachePath)
+		os.MkdirAll(filepath.Dir(p), 0755)
+		predictOptions = append(predictOptions, llama.SetPathPromptCache(p))
+	}
+
 	if c.Mirostat != 0 {
 		predictOptions = append(predictOptions, llama.SetMirostat(c.Mirostat))
 	}
@@ -469,7 +482,7 @@ func ModelInference(s string, loader *model.ModelLoader, c Config, tokenCallback
 				model.SetTokenCallback(tokenCallback)
 			}
 
-			predictOptions := buildLLamaPredictOptions(c)
+			predictOptions := buildLLamaPredictOptions(c, loader.ModelPath)
 
 			str, er := model.Predict(
 				s,