fix: drop racy code, refactor and group API schema (#931)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

api/api.go

@@ -9,6 +9,7 @@ import (
 	"github.com/go-skynet/LocalAI/api/localai"
 	"github.com/go-skynet/LocalAI/api/openai"
 	"github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	"github.com/go-skynet/LocalAI/internal"
 	"github.com/go-skynet/LocalAI/pkg/assets"
 
@@ -104,8 +105,8 @@ func App(opts ...options.AppOption) (*fiber.App, error) {
 
 			// Send custom error page
 			return ctx.Status(code).JSON(
-				openai.ErrorResponse{
-					Error: &openai.APIError{Message: err.Error(), Code: code},
+				schema.ErrorResponse{
+					Error: &schema.APIError{Message: err.Error(), Code: code},
 				},
 			)
 		},

api/backend/transcript.go

@@ -5,14 +5,14 @@ import (
 	"fmt"
 
 	config "github.com/go-skynet/LocalAI/api/config"
+	"github.com/go-skynet/LocalAI/api/schema"
 
 	"github.com/go-skynet/LocalAI/api/options"
 	"github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 )
 
-func ModelTranscription(audio, language string, loader *model.ModelLoader, c config.Config, o *options.Option) (*api.Result, error) {
+func ModelTranscription(audio, language string, loader *model.ModelLoader, c config.Config, o *options.Option) (*schema.Result, error) {
 
 	opts := modelOpts(c, o, []model.Option{
 		model.WithBackendString(model.WhisperBackend),

api/openai/chat.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-skynet/LocalAI/api/backend"
 	config "github.com/go-skynet/LocalAI/api/config"
 	"github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	"github.com/go-skynet/LocalAI/pkg/grammar"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/go-skynet/LocalAI/pkg/utils"
@@ -21,20 +22,20 @@ import (
 func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx) error {
 	emptyMessage := ""
 
-	process := func(s string, req *OpenAIRequest, config *config.Config, loader *model.ModelLoader, responses chan OpenAIResponse) {
-		initialMessage := OpenAIResponse{
+	process := func(s string, req *schema.OpenAIRequest, config *config.Config, loader *model.ModelLoader, responses chan schema.OpenAIResponse) {
+		initialMessage := schema.OpenAIResponse{
 			Model:   req.Model, // we have to return what the user sent here, due to OpenAI spec.
-			Choices: []Choice{{Delta: &Message{Role: "assistant", Content: &emptyMessage}}},
+			Choices: []schema.Choice{{Delta: &schema.Message{Role: "assistant", Content: &emptyMessage}}},
 			Object:  "chat.completion.chunk",
 		}
 		responses <- initialMessage
 
-		ComputeChoices(req, s, config, o, loader, func(s string, c *[]Choice) {}, func(s string, usage backend.TokenUsage) bool {
-			resp := OpenAIResponse{
+		ComputeChoices(req, s, config, o, loader, func(s string, c *[]schema.Choice) {}, func(s string, usage backend.TokenUsage) bool {
+			resp := schema.OpenAIResponse{
 				Model:   req.Model, // we have to return what the user sent here, due to OpenAI spec.
-				Choices: []Choice{{Delta: &Message{Content: &s}, Index: 0}},
+				Choices: []schema.Choice{{Delta: &schema.Message{Content: &s}, Index: 0}},
 				Object:  "chat.completion.chunk",
-				Usage: OpenAIUsage{
+				Usage: schema.OpenAIUsage{
 					PromptTokens:     usage.Prompt,
 					CompletionTokens: usage.Completion,
 					TotalTokens:      usage.Prompt + usage.Completion,
@@ -236,13 +237,13 @@ func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 		}
 
 		if toStream {
-			responses := make(chan OpenAIResponse)
+			responses := make(chan schema.OpenAIResponse)
 
 			go process(predInput, input, config, o.Loader, responses)
 
 			c.Context().SetBodyStreamWriter(fasthttp.StreamWriter(func(w *bufio.Writer) {
 
-				usage := &OpenAIUsage{}
+				usage := &schema.OpenAIUsage{}
 
 				for ev := range responses {
 					usage = &ev.Usage // Copy a pointer to the latest usage chunk so that the stop message can reference it
@@ -259,13 +260,13 @@ func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 					w.Flush()
 				}
 
-				resp := &OpenAIResponse{
+				resp := &schema.OpenAIResponse{
 					Model: input.Model, // we have to return what the user sent here, due to OpenAI spec.
-					Choices: []Choice{
+					Choices: []schema.Choice{
 						{
 							FinishReason: "stop",
 							Index:        0,
-							Delta:        &Message{Content: &emptyMessage},
+							Delta:        &schema.Message{Content: &emptyMessage},
 						}},
 					Object: "chat.completion.chunk",
 					Usage:  *usage,
@@ -279,7 +280,7 @@ func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 			return nil
 		}
 
-		result, tokenUsage, err := ComputeChoices(input, predInput, config, o, o.Loader, func(s string, c *[]Choice) {
+		result, tokenUsage, err := ComputeChoices(input, predInput, config, o, o.Loader, func(s string, c *[]schema.Choice) {
 			if processFunctions {
 				// As we have to change the result before processing, we can't stream the answer (yet?)
 				ss := map[string]interface{}{}
@@ -313,7 +314,7 @@ func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 								message = backend.Finetune(*config, predInput, message)
 								log.Debug().Msgf("Reply received from LLM(finetuned): %s", message)
 
-								*c = append(*c, Choice{Message: &Message{Role: "assistant", Content: &message}})
+								*c = append(*c, schema.Choice{Message: &schema.Message{Role: "assistant", Content: &message}})
 								return
 							}
 						}
@@ -336,28 +337,28 @@ func ChatEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 					}
 
 					fineTunedResponse := backend.Finetune(*config, predInput, prediction.Response)
-					*c = append(*c, Choice{Message: &Message{Role: "assistant", Content: &fineTunedResponse}})
+					*c = append(*c, schema.Choice{Message: &schema.Message{Role: "assistant", Content: &fineTunedResponse}})
 				} else {
 					// otherwise reply with the function call
-					*c = append(*c, Choice{
+					*c = append(*c, schema.Choice{
 						FinishReason: "function_call",
-						Message:      &Message{Role: "assistant", FunctionCall: ss},
+						Message:      &schema.Message{Role: "assistant", FunctionCall: ss},
 					})
 				}
 
 				return
 			}
-			*c = append(*c, Choice{FinishReason: "stop", Index: 0, Message: &Message{Role: "assistant", Content: &s}})
+			*c = append(*c, schema.Choice{FinishReason: "stop", Index: 0, Message: &schema.Message{Role: "assistant", Content: &s}})
 		}, nil)
 		if err != nil {
 			return err
 		}
 
-		resp := &OpenAIResponse{
+		resp := &schema.OpenAIResponse{
 			Model:   input.Model, // we have to return what the user sent here, due to OpenAI spec.
 			Choices: result,
 			Object:  "chat.completion",
-			Usage: OpenAIUsage{
+			Usage: schema.OpenAIUsage{
 				PromptTokens:     tokenUsage.Prompt,
 				CompletionTokens: tokenUsage.Completion,
 				TotalTokens:      tokenUsage.Prompt + tokenUsage.Completion,

api/openai/completion.go

@@ -10,6 +10,7 @@ import (
 	"github.com/go-skynet/LocalAI/api/backend"
 	config "github.com/go-skynet/LocalAI/api/config"
 	"github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/gofiber/fiber/v2"
 	"github.com/rs/zerolog/log"
@@ -18,18 +19,18 @@ import (
 
 // https://platform.openai.com/docs/api-reference/completions
 func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx) error {
-	process := func(s string, req *OpenAIRequest, config *config.Config, loader *model.ModelLoader, responses chan OpenAIResponse) {
-		ComputeChoices(req, s, config, o, loader, func(s string, c *[]Choice) {}, func(s string, usage backend.TokenUsage) bool {
-			resp := OpenAIResponse{
+	process := func(s string, req *schema.OpenAIRequest, config *config.Config, loader *model.ModelLoader, responses chan schema.OpenAIResponse) {
+		ComputeChoices(req, s, config, o, loader, func(s string, c *[]schema.Choice) {}, func(s string, usage backend.TokenUsage) bool {
+			resp := schema.OpenAIResponse{
 				Model: req.Model, // we have to return what the user sent here, due to OpenAI spec.
-				Choices: []Choice{
+				Choices: []schema.Choice{
 					{
 						Index: 0,
 						Text:  s,
 					},
 				},
 				Object: "text_completion",
-				Usage: OpenAIUsage{
+				Usage: schema.OpenAIUsage{
 					PromptTokens:     usage.Prompt,
 					CompletionTokens: usage.Completion,
 					TotalTokens:      usage.Prompt + usage.Completion,
@@ -90,7 +91,7 @@ func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 				log.Debug().Msgf("Template found, input modified to: %s", predInput)
 			}
 
-			responses := make(chan OpenAIResponse)
+			responses := make(chan schema.OpenAIResponse)
 
 			go process(predInput, input, config, o.Loader, responses)
 
@@ -106,9 +107,9 @@ func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 					w.Flush()
 				}
 
-				resp := &OpenAIResponse{
+				resp := &schema.OpenAIResponse{
 					Model: input.Model, // we have to return what the user sent here, due to OpenAI spec.
-					Choices: []Choice{
+					Choices: []schema.Choice{
 						{
 							Index:        0,
 							FinishReason: "stop",
@@ -125,7 +126,7 @@ func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 			return nil
 		}
 
-		var result []Choice
+		var result []schema.Choice
 
 		totalTokenUsage := backend.TokenUsage{}
 
@@ -140,9 +141,10 @@ func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 				log.Debug().Msgf("Template found, input modified to: %s", i)
 			}
 
-			r, tokenUsage, err := ComputeChoices(input, i, config, o, o.Loader, func(s string, c *[]Choice) {
-				*c = append(*c, Choice{Text: s, FinishReason: "stop", Index: k})
-			}, nil)
+			r, tokenUsage, err := ComputeChoices(
+				input, i, config, o, o.Loader, func(s string, c *[]schema.Choice) {
+					*c = append(*c, schema.Choice{Text: s, FinishReason: "stop", Index: k})
+				}, nil)
 			if err != nil {
 				return err
 			}
@@ -153,11 +155,11 @@ func CompletionEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 			result = append(result, r...)
 		}
 
-		resp := &OpenAIResponse{
+		resp := &schema.OpenAIResponse{
 			Model:   input.Model, // we have to return what the user sent here, due to OpenAI spec.
 			Choices: result,
 			Object:  "text_completion",
-			Usage: OpenAIUsage{
+			Usage: schema.OpenAIUsage{
 				PromptTokens:     totalTokenUsage.Prompt,
 				CompletionTokens: totalTokenUsage.Completion,
 				TotalTokens:      totalTokenUsage.Prompt + totalTokenUsage.Completion,

api/openai/edit.go

@@ -7,8 +7,10 @@ import (
 	"github.com/go-skynet/LocalAI/api/backend"
 	config "github.com/go-skynet/LocalAI/api/config"
 	"github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/gofiber/fiber/v2"
+
 	"github.com/rs/zerolog/log"
 )
 
@@ -32,7 +34,7 @@ func EditEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 			templateFile = config.TemplateConfig.Edit
 		}
 
-		var result []Choice
+		var result []schema.Choice
 		totalTokenUsage := backend.TokenUsage{}
 
 		for _, i := range config.InputStrings {
@@ -47,8 +49,8 @@ func EditEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 				log.Debug().Msgf("Template found, input modified to: %s", i)
 			}
 
-			r, tokenUsage, err := ComputeChoices(input, i, config, o, o.Loader, func(s string, c *[]Choice) {
-				*c = append(*c, Choice{Text: s})
+			r, tokenUsage, err := ComputeChoices(input, i, config, o, o.Loader, func(s string, c *[]schema.Choice) {
+				*c = append(*c, schema.Choice{Text: s})
 			}, nil)
 			if err != nil {
 				return err
@@ -60,11 +62,11 @@ func EditEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx)
 			result = append(result, r...)
 		}
 
-		resp := &OpenAIResponse{
+		resp := &schema.OpenAIResponse{
 			Model:   input.Model, // we have to return what the user sent here, due to OpenAI spec.
 			Choices: result,
 			Object:  "edit",
-			Usage: OpenAIUsage{
+			Usage: schema.OpenAIUsage{
 				PromptTokens:     totalTokenUsage.Prompt,
 				CompletionTokens: totalTokenUsage.Completion,
 				TotalTokens:      totalTokenUsage.Prompt + totalTokenUsage.Completion,

api/openai/embeddings.go

@@ -6,6 +6,8 @@ import (
 
 	"github.com/go-skynet/LocalAI/api/backend"
 	config "github.com/go-skynet/LocalAI/api/config"
+	"github.com/go-skynet/LocalAI/api/schema"
+
 	"github.com/go-skynet/LocalAI/api/options"
 	"github.com/gofiber/fiber/v2"
 	"github.com/rs/zerolog/log"
@@ -25,7 +27,7 @@ func EmbeddingsEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 		}
 
 		log.Debug().Msgf("Parameter Config: %+v", config)
-		items := []Item{}
+		items := []schema.Item{}
 
 		for i, s := range config.InputToken {
 			// get the model function to call for the result
@@ -38,7 +40,7 @@ func EmbeddingsEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 			if err != nil {
 				return err
 			}
-			items = append(items, Item{Embedding: embeddings, Index: i, Object: "embedding"})
+			items = append(items, schema.Item{Embedding: embeddings, Index: i, Object: "embedding"})
 		}
 
 		for i, s := range config.InputStrings {
@@ -52,10 +54,10 @@ func EmbeddingsEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fibe
 			if err != nil {
 				return err
 			}
-			items = append(items, Item{Embedding: embeddings, Index: i, Object: "embedding"})
+			items = append(items, schema.Item{Embedding: embeddings, Index: i, Object: "embedding"})
 		}
 
-		resp := &OpenAIResponse{
+		resp := &schema.OpenAIResponse{
 			Model:  input.Model, // we have to return what the user sent here, due to OpenAI spec.
 			Data:   items,
 			Object: "list",

api/openai/image.go

@@ -5,6 +5,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"github.com/go-skynet/LocalAI/api/schema"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -100,7 +101,7 @@ func ImageEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx
 			b64JSON = true
 		}
 		// src and clip_skip
-		var result []Item
+		var result []schema.Item
 		for _, i := range config.PromptStrings {
 			n := input.N
 			if input.N == 0 {
@@ -155,7 +156,7 @@ func ImageEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx
 					return err
 				}
 
-				item := &Item{}
+				item := &schema.Item{}
 
 				if b64JSON {
 					defer os.RemoveAll(output)
@@ -173,7 +174,7 @@ func ImageEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx
 			}
 		}
 
-		resp := &OpenAIResponse{
+		resp := &schema.OpenAIResponse{
 			Data: result,
 		}
 

api/openai/inference.go

@@ -4,12 +4,20 @@ import (
 	"github.com/go-skynet/LocalAI/api/backend"
 	config "github.com/go-skynet/LocalAI/api/config"
 	"github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 )
 
-func ComputeChoices(req *OpenAIRequest, predInput string, config *config.Config, o *options.Option, loader *model.ModelLoader, cb func(string, *[]Choice), tokenCallback func(string, backend.TokenUsage) bool) ([]Choice, backend.TokenUsage, error) {
+func ComputeChoices(
+	req *schema.OpenAIRequest,
+	predInput string,
+	config *config.Config,
+	o *options.Option,
+	loader *model.ModelLoader,
+	cb func(string, *[]schema.Choice),
+	tokenCallback func(string, backend.TokenUsage) bool) ([]schema.Choice, backend.TokenUsage, error) {
 	n := req.N // number of completions to return
-	result := []Choice{}
+	result := []schema.Choice{}
 
 	if n == 0 {
 		n = 1

api/openai/list.go

@@ -4,6 +4,7 @@ import (
 	"regexp"
 
 	config "github.com/go-skynet/LocalAI/api/config"
+	"github.com/go-skynet/LocalAI/api/schema"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/gofiber/fiber/v2"
 )
@@ -16,7 +17,7 @@ func ListModelsEndpoint(loader *model.ModelLoader, cm *config.ConfigLoader) func
 		}
 		var mm map[string]interface{} = map[string]interface{}{}
 
-		dataModels := []OpenAIModel{}
+		dataModels := []schema.OpenAIModel{}
 
 		var filterFn func(name string) bool
 		filter := c.Query("filter")
@@ -45,7 +46,7 @@ func ListModelsEndpoint(loader *model.ModelLoader, cm *config.ConfigLoader) func
 			}
 
 			if filterFn(c.Name) {
-				dataModels = append(dataModels, OpenAIModel{ID: c.Name, Object: "model"})
+				dataModels = append(dataModels, schema.OpenAIModel{ID: c.Name, Object: "model"})
 			}
 		}
 
@@ -53,13 +54,13 @@ func ListModelsEndpoint(loader *model.ModelLoader, cm *config.ConfigLoader) func
 		for _, m := range models {
 			// And only adds them if they shouldn't be skipped.
 			if _, exists := mm[m]; !exists && filterFn(m) {
-				dataModels = append(dataModels, OpenAIModel{ID: m, Object: "model"})
+				dataModels = append(dataModels, schema.OpenAIModel{ID: m, Object: "model"})
 			}
 		}
 
 		return c.JSON(struct {
-			Object string        `json:"object"`
-			Data   []OpenAIModel `json:"data"`
+			Object string               `json:"object"`
+			Data   []schema.OpenAIModel `json:"data"`
 		}{
 			Object: "list",
 			Data:   dataModels,

api/openai/request.go

@@ -10,14 +10,15 @@ import (
 
 	config "github.com/go-skynet/LocalAI/api/config"
 	options "github.com/go-skynet/LocalAI/api/options"
+	"github.com/go-skynet/LocalAI/api/schema"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/gofiber/fiber/v2"
 	"github.com/rs/zerolog/log"
 )
 
-func readInput(c *fiber.Ctx, o *options.Option, randomModel bool) (string, *OpenAIRequest, error) {
+func readInput(c *fiber.Ctx, o *options.Option, randomModel bool) (string, *schema.OpenAIRequest, error) {
 	loader := o.Loader
-	input := new(OpenAIRequest)
+	input := new(schema.OpenAIRequest)
 	ctx, cancel := context.WithCancel(o.Context)
 	input.Context = ctx
 	input.Cancel = cancel
@@ -60,7 +61,7 @@ func readInput(c *fiber.Ctx, o *options.Option, randomModel bool) (string, *Open
 	return modelFile, input, nil
 }
 
-func updateConfig(config *config.Config, input *OpenAIRequest) {
+func updateConfig(config *config.Config, input *schema.OpenAIRequest) {
 	if input.Echo {
 		config.Echo = input.Echo
 	}
@@ -218,7 +219,7 @@ func updateConfig(config *config.Config, input *OpenAIRequest) {
 	}
 }
 
-func readConfig(modelFile string, input *OpenAIRequest, cm *config.ConfigLoader, loader *model.ModelLoader, debug bool, threads, ctx int, f16 bool) (*config.Config, *OpenAIRequest, error) {
+func readConfig(modelFile string, input *schema.OpenAIRequest, cm *config.ConfigLoader, loader *model.ModelLoader, debug bool, threads, ctx int, f16 bool) (*config.Config, *schema.OpenAIRequest, error) {
 	// Load a config file if present after the model name
 	modelConfig := filepath.Join(loader.ModelPath, modelFile+".yaml")
 

api/schema/openai.go

@@ -1,4 +1,4 @@
-package openai
+package schema
 
 import (
 	"context"

api/schema/whisper.go

@@ -1,4 +1,4 @@
-package api
+package schema
 
 import "time"
 

cmd/grpc/bert-embeddings/main.go

@@ -5,8 +5,8 @@ package main
 import (
 	"flag"
 
+	bert "github.com/go-skynet/LocalAI/pkg/backend/llm/bert"
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
-	bert "github.com/go-skynet/LocalAI/pkg/grpc/llm/bert"
 )
 
 var (

cmd/grpc/bloomz/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	bloomz "github.com/go-skynet/LocalAI/pkg/grpc/llm/bloomz"
+	bloomz "github.com/go-skynet/LocalAI/pkg/backend/llm/bloomz"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/dolly/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/falcon-ggml/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/falcon/main.go

@@ -7,7 +7,7 @@ package main
 import (
 	"flag"
 
-	falcon "github.com/go-skynet/LocalAI/pkg/grpc/llm/falcon"
+	falcon "github.com/go-skynet/LocalAI/pkg/backend/llm/falcon"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/gpt2/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/gpt4all/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	gpt4all "github.com/go-skynet/LocalAI/pkg/grpc/llm/gpt4all"
+	gpt4all "github.com/go-skynet/LocalAI/pkg/backend/llm/gpt4all"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/gptj/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/gptneox/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/langchain-huggingface/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	langchain "github.com/go-skynet/LocalAI/pkg/grpc/llm/langchain"
+	langchain "github.com/go-skynet/LocalAI/pkg/backend/llm/langchain"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/llama/main.go

@@ -7,7 +7,7 @@ package main
 import (
 	"flag"
 
-	llama "github.com/go-skynet/LocalAI/pkg/grpc/llm/llama"
+	llama "github.com/go-skynet/LocalAI/pkg/backend/llm/llama"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/mpt/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/piper/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	tts "github.com/go-skynet/LocalAI/pkg/grpc/tts"
+	tts "github.com/go-skynet/LocalAI/pkg/backend/tts"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/replit/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/rwkv/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	rwkv "github.com/go-skynet/LocalAI/pkg/grpc/llm/rwkv"
+	rwkv "github.com/go-skynet/LocalAI/pkg/backend/llm/rwkv"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/stablediffusion/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	image "github.com/go-skynet/LocalAI/pkg/grpc/image"
+	image "github.com/go-skynet/LocalAI/pkg/backend/image"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/starcoder/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transformers "github.com/go-skynet/LocalAI/pkg/grpc/llm/transformers"
+	transformers "github.com/go-skynet/LocalAI/pkg/backend/llm/transformers"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

cmd/grpc/whisper/main.go

@@ -5,7 +5,7 @@ package main
 import (
 	"flag"
 
-	transcribe "github.com/go-skynet/LocalAI/pkg/grpc/transcribe"
+	transcribe "github.com/go-skynet/LocalAI/pkg/backend/transcribe"
 
 	grpc "github.com/go-skynet/LocalAI/pkg/grpc"
 )

pkg/backend/image/stablediffusion.go

@@ -9,7 +9,7 @@ import (
 )
 
 type StableDiffusion struct {
-	base.Base
+	base.SingleThread
 	stablediffusion *stablediffusion.StableDiffusion
 }
 

pkg/backend/llm/bert/bert.go

@@ -4,32 +4,23 @@ package bert
 // It is meant to be used by the main executable that is the server for the specific backend type (falcon, gpt3, etc)
 import (
 	bert "github.com/go-skynet/go-bert.cpp"
-	"github.com/rs/zerolog/log"
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
 )
 
 type Embeddings struct {
-	base.Base
+	base.SingleThread
 	bert *bert.Bert
 }
 
 func (llm *Embeddings) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("bert backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := bert.New(opts.ModelFile)
 	llm.bert = model
 	return err
 }
 
 func (llm *Embeddings) Embeddings(opts *pb.PredictOptions) ([]float32, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 
 	if len(opts.EmbeddingTokens) > 0 {
 		tokens := []int{}

pkg/backend/llm/bloomz/bloomz.go

@@ -7,24 +7,17 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	"github.com/go-skynet/bloomz.cpp"
 )
 
 type LLM struct {
-	base.Base
+	base.SingleThread
 
 	bloomz *bloomz.Bloomz
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("bloomz backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := bloomz.New(opts.ModelFile)
 	llm.bloomz = model
 	return err
@@ -47,16 +40,11 @@ func buildPredictOptions(opts *pb.PredictOptions) []bloomz.PredictOption {
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	return llm.bloomz.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
-
 	go func() {
 		res, err := llm.bloomz.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -65,7 +53,6 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/falcon/falcon.go

@@ -7,25 +7,17 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	ggllm "github.com/mudler/go-ggllm.cpp"
 )
 
 type LLM struct {
-	base.Base
+	base.SingleThread
 
 	falcon *ggllm.Falcon
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("falcon backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	ggllmOpts := []ggllm.ModelOption{}
 	if opts.ContextSize != 0 {
 		ggllmOpts = append(ggllmOpts, ggllm.SetContext(int(opts.ContextSize)))
@@ -126,13 +118,10 @@ func buildPredictOptions(opts *pb.PredictOptions) []ggllm.PredictOption {
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.falcon.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 
 	predictOptions := buildPredictOptions(opts)
 
@@ -150,7 +139,6 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 			fmt.Println("err: ", err)
 		}
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/gpt4all/gpt4all.go

@@ -8,23 +8,15 @@ import (
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
 	gpt4all "github.com/nomic-ai/gpt4all/gpt4all-bindings/golang"
-	"github.com/rs/zerolog/log"
 )
 
 type LLM struct {
-	base.Base
+	base.SingleThread
 
 	gpt4all *gpt4all.Model
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("gpt4all backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	model, err := gpt4all.New(opts.ModelFile,
 		gpt4all.SetThreads(int(opts.Threads)),
 		gpt4all.SetLibrarySearchPath(opts.LibrarySearchPath))
@@ -47,15 +39,10 @@ func buildPredictOptions(opts *pb.PredictOptions) []gpt4all.PredictOption {
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	return llm.gpt4all.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
-
 	predictOptions := buildPredictOptions(opts)
 
 	go func() {
@@ -69,7 +56,6 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 		}
 		llm.gpt4all.SetTokenCallback(nil)
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/langchain/langchain.go

@@ -8,7 +8,6 @@ import (
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
 	"github.com/go-skynet/LocalAI/pkg/langchain"
-	"github.com/rs/zerolog/log"
 )
 
 type LLM struct {
@@ -19,21 +18,12 @@ type LLM struct {
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("langchain backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	llm.langchain, _ = langchain.NewHuggingFace(opts.Model)
 	llm.model = opts.Model
 	return nil
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	o := []langchain.PredictOption{
 		langchain.SetModel(llm.model),
 		langchain.SetMaxTokens(int(opts.Tokens)),
@@ -48,7 +38,6 @@ func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
 }
 
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	o := []langchain.PredictOption{
 		langchain.SetModel(llm.model),
 		langchain.SetMaxTokens(int(opts.Tokens)),
@@ -63,7 +52,6 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 		}
 		results <- res.Completion
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/llama/llama.go

@@ -8,24 +8,15 @@ import (
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
 	"github.com/go-skynet/go-llama.cpp"
-	"github.com/rs/zerolog/log"
 )
 
 type LLM struct {
-	base.Base
+	base.SingleThread
 
 	llama *llama.LLama
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("llama backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	ropeFreqBase := float32(10000)
 	ropeFreqScale := float32(1)
 
@@ -176,14 +167,10 @@ func buildPredictOptions(opts *pb.PredictOptions) []llama.PredictOption {
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.llama.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
-
 	predictOptions := buildPredictOptions(opts)
 
 	predictOptions = append(predictOptions, llama.SetTokenCallback(func(token string) bool {
@@ -197,16 +184,12 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 			fmt.Println("err: ", err)
 		}
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil
 }
 
 func (llm *LLM) Embeddings(opts *pb.PredictOptions) ([]float32, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	predictOptions := buildPredictOptions(opts)
 
 	if len(opts.EmbeddingTokens) > 0 {
@@ -221,9 +204,6 @@ func (llm *LLM) Embeddings(opts *pb.PredictOptions) ([]float32, error) {
 }
 
 func (llm *LLM) TokenizeString(opts *pb.PredictOptions) (pb.TokenizationResponse, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	predictOptions := buildPredictOptions(opts)
 	l, tokens, err := llm.llama.TokenizeString(opts.Prompt, predictOptions...)
 	if err != nil {

pkg/backend/llm/rwkv/rwkv.go

@@ -9,24 +9,17 @@ import (
 	"github.com/donomii/go-rwkv.cpp"
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 )
 
 const tokenizerSuffix = ".tokenizer.json"
 
 type LLM struct {
-	base.Base
+	base.SingleThread
 
 	rwkv *rwkv.RwkvState
 }
 
 func (llm *LLM) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("rwkv backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	modelPath := filepath.Dir(opts.ModelFile)
 	modelFile := filepath.Base(opts.ModelFile)
 	model := rwkv.LoadFiles(opts.ModelFile, filepath.Join(modelPath, modelFile+tokenizerSuffix), uint32(opts.GetThreads()))
@@ -39,9 +32,6 @@ func (llm *LLM) Load(opts *pb.ModelOptions) error {
 }
 
 func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	stopWord := "\n"
 	if len(opts.StopPrompts) > 0 {
 		stopWord = opts.StopPrompts[0]
@@ -57,7 +47,6 @@ func (llm *LLM) Predict(opts *pb.PredictOptions) (string, error) {
 }
 
 func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 
 		stopWord := "\n"
@@ -75,7 +64,6 @@ func (llm *LLM) PredictStream(opts *pb.PredictOptions, results chan string) erro
 			return true
 		})
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/transformers/dolly.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type Dolly struct {
-	base.Base
+	base.SingleThread
 
 	dolly *transformers.Dolly
 }
 
 func (llm *Dolly) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("dolly backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewDolly(opts.ModelFile)
 	llm.dolly = model
 	return err
 }
 
 func (llm *Dolly) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.dolly.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *Dolly) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 
 	go func() {
 		res, err := llm.dolly.Predict(opts.Prompt, buildPredictOptions(opts)...)
@@ -48,7 +38,6 @@ func (llm *Dolly) PredictStream(opts *pb.PredictOptions, results chan string) er
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/transformers/falcon.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type Falcon struct {
-	base.Base
+	base.SingleThread
 
 	falcon *transformers.Falcon
 }
 
 func (llm *Falcon) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("transformers-falcon backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewFalcon(opts.ModelFile)
 	llm.falcon = model
 	return err
 }
 
 func (llm *Falcon) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.falcon.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *Falcon) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.falcon.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *Falcon) PredictStream(opts *pb.PredictOptions, results chan string) e
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/llm/transformers/gpt2.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type GPT2 struct {
-	base.Base
+	base.SingleThread
 
 	gpt2 *transformers.GPT2
 }
 
 func (llm *GPT2) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("gpt2 backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.New(opts.ModelFile)
 	llm.gpt2 = model
 	return err
 }
 
 func (llm *GPT2) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.gpt2.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *GPT2) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.gpt2.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *GPT2) PredictStream(opts *pb.PredictOptions, results chan string) err
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 	return nil
 }

pkg/backend/llm/transformers/gptj.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type GPTJ struct {
-	base.Base
+	base.SingleThread
 
 	gptj *transformers.GPTJ
 }
 
 func (llm *GPTJ) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("gptj backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewGPTJ(opts.ModelFile)
 	llm.gptj = model
 	return err
 }
 
 func (llm *GPTJ) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.gptj.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *GPTJ) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.gptj.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *GPTJ) PredictStream(opts *pb.PredictOptions, results chan string) err
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 	return nil
 }

pkg/backend/llm/transformers/gptneox.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type GPTNeoX struct {
-	base.Base
+	base.SingleThread
 
 	gptneox *transformers.GPTNeoX
 }
 
 func (llm *GPTNeoX) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("gptneox backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewGPTNeoX(opts.ModelFile)
 	llm.gptneox = model
 	return err
 }
 
 func (llm *GPTNeoX) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.gptneox.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *GPTNeoX) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.gptneox.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *GPTNeoX) PredictStream(opts *pb.PredictOptions, results chan string)
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 	return nil
 }

pkg/backend/llm/transformers/mpt.go

@@ -7,39 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type MPT struct {
-	base.Base
+	base.SingleThread
 
 	mpt *transformers.MPT
 }
 
 func (llm *MPT) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("mpt backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewMPT(opts.ModelFile)
 	llm.mpt = model
 	return err
 }
 
 func (llm *MPT) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
-
 	return llm.mpt.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *MPT) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.mpt.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -48,7 +37,6 @@ func (llm *MPT) PredictStream(opts *pb.PredictOptions, results chan string) erro
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 	return nil
 }

pkg/backend/llm/transformers/replit.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type Replit struct {
-	base.Base
+	base.SingleThread
 
 	replit *transformers.Replit
 }
 
 func (llm *Replit) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("replit backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewReplit(opts.ModelFile)
 	llm.replit = model
 	return err
 }
 
 func (llm *Replit) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.replit.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *Replit) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.replit.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *Replit) PredictStream(opts *pb.PredictOptions, results chan string) e
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 	return nil
 }

pkg/backend/llm/transformers/starcoder.go

@@ -7,38 +7,28 @@ import (
 
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/rs/zerolog/log"
 
 	transformers "github.com/go-skynet/go-ggml-transformers.cpp"
 )
 
 type Starcoder struct {
-	base.Base
+	base.SingleThread
 
 	starcoder *transformers.Starcoder
 }
 
 func (llm *Starcoder) Load(opts *pb.ModelOptions) error {
-	if llm.Base.State != pb.StatusResponse_UNINITIALIZED {
-		log.Warn().Msgf("starcoder backend loading %s while already in state %s!", opts.Model, llm.Base.State.String())
-	}
-
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	model, err := transformers.NewStarcoder(opts.ModelFile)
 	llm.starcoder = model
 	return err
 }
 
 func (llm *Starcoder) Predict(opts *pb.PredictOptions) (string, error) {
-	llm.Base.Lock()
-	defer llm.Base.Unlock()
 	return llm.starcoder.Predict(opts.Prompt, buildPredictOptions(opts)...)
 }
 
 // fallback to Predict
 func (llm *Starcoder) PredictStream(opts *pb.PredictOptions, results chan string) error {
-	llm.Base.Lock()
 	go func() {
 		res, err := llm.starcoder.Predict(opts.Prompt, buildPredictOptions(opts)...)
 
@@ -47,7 +37,6 @@ func (llm *Starcoder) PredictStream(opts *pb.PredictOptions, results chan string
 		}
 		results <- res
 		close(results)
-		llm.Base.Unlock()
 	}()
 
 	return nil

pkg/backend/transcribe/transcript.go

@@ -1,4 +1,4 @@
-package whisper
+package transcribe
 
 import (
 	"fmt"
@@ -7,8 +7,8 @@ import (
 	"path/filepath"
 
 	"github.com/ggerganov/whisper.cpp/bindings/go/pkg/whisper"
-	wav "github.com/go-audio/wav"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
+	"github.com/go-audio/wav"
+	"github.com/go-skynet/LocalAI/api/schema"
 )
 
 func sh(c string) (string, error) {
@@ -29,8 +29,8 @@ func audioToWav(src, dst string) error {
 	return nil
 }
 
-func Transcript(model whisper.Model, audiopath, language string, threads uint) (api.Result, error) {
-	res := api.Result{}
+func Transcript(model whisper.Model, audiopath, language string, threads uint) (schema.Result, error) {
+	res := schema.Result{}
 
 	dir, err := os.MkdirTemp("", "whisper")
 	if err != nil {
@@ -90,7 +90,7 @@ func Transcript(model whisper.Model, audiopath, language string, threads uint) (
 			tokens = append(tokens, t.Id)
 		}
 
-		segment := api.Segment{Id: s.Num, Text: s.Text, Start: s.Start, End: s.End, Tokens: tokens}
+		segment := schema.Segment{Id: s.Num, Text: s.Text, Start: s.Start, End: s.End, Tokens: tokens}
 		res.Segments = append(res.Segments, segment)
 
 		res.Text += s.Text

pkg/backend/transcribe/whisper.go

@@ -4,14 +4,13 @@ package transcribe
 // It is meant to be used by the main executable that is the server for the specific backend type (falcon, gpt3, etc)
 import (
 	"github.com/ggerganov/whisper.cpp/bindings/go/pkg/whisper"
+	"github.com/go-skynet/LocalAI/api/schema"
 	"github.com/go-skynet/LocalAI/pkg/grpc/base"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	whisperutil "github.com/go-skynet/LocalAI/pkg/grpc/whisper"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
 )
 
 type Whisper struct {
-	base.Base
+	base.SingleThread
 	whisper whisper.Model
 }
 
@@ -22,6 +21,6 @@ func (sd *Whisper) Load(opts *pb.ModelOptions) error {
 	return err
 }
 
-func (sd *Whisper) AudioTranscription(opts *pb.TranscriptRequest) (api.Result, error) {
-	return whisperutil.Transcript(sd.whisper, opts.Dst, opts.Language, uint(opts.Threads))
+func (sd *Whisper) AudioTranscription(opts *pb.TranscriptRequest) (schema.Result, error) {
+	return Transcript(sd.whisper, opts.Dst, opts.Language, uint(opts.Threads))
 }

pkg/backend/tts/piper.go

@@ -13,7 +13,7 @@ import (
 )
 
 type Piper struct {
-	base.Base
+	base.SingleThread
 	piper *PiperB
 }
 

pkg/grpc/base/base.go

@@ -5,34 +5,32 @@ package base
 import (
 	"fmt"
 	"os"
-	"sync"
 
+	"github.com/go-skynet/LocalAI/api/schema"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
 	gopsutil "github.com/shirou/gopsutil/v3/process"
 )
 
+// Base is a base class for all backends to implement
+// Note: the backends that does not support multiple requests
+// should use SingleThread instead
 type Base struct {
-	backendBusy sync.Mutex
-	State       pb.StatusResponse_State
 }
 
-func (llm *Base) Busy() bool {
-	r := llm.backendBusy.TryLock()
-	if r {
-		llm.backendBusy.Unlock()
-	}
-	return r
+func (llm *Base) Locking() bool {
+	return false
 }
 
 func (llm *Base) Lock() {
-	llm.backendBusy.Lock()
-	llm.State = pb.StatusResponse_BUSY
+	panic("not implemented")
 }
 
 func (llm *Base) Unlock() {
-	llm.State = pb.StatusResponse_READY
-	llm.backendBusy.Unlock()
+	panic("not implemented")
+}
+
+func (llm *Base) Busy() bool {
+	return false
 }
 
 func (llm *Base) Load(opts *pb.ModelOptions) error {
@@ -55,8 +53,8 @@ func (llm *Base) GenerateImage(*pb.GenerateImageRequest) error {
 	return fmt.Errorf("unimplemented")
 }
 
-func (llm *Base) AudioTranscription(*pb.TranscriptRequest) (api.Result, error) {
-	return api.Result{}, fmt.Errorf("unimplemented")
+func (llm *Base) AudioTranscription(*pb.TranscriptRequest) (schema.Result, error) {
+	return schema.Result{}, fmt.Errorf("unimplemented")
 }
 
 func (llm *Base) TTS(*pb.TTSRequest) error {
@@ -69,7 +67,12 @@ func (llm *Base) TokenizeString(opts *pb.PredictOptions) (pb.TokenizationRespons
 
 // backends may wish to call this to capture the gopsutil info, then enhance with additional memory usage details?
 func (llm *Base) Status() (pb.StatusResponse, error) {
+	return pb.StatusResponse{
+		Memory: memoryUsage(),
+	}, nil
+}
 
+func memoryUsage() *pb.MemoryUsageData {
 	mud := pb.MemoryUsageData{
 		Breakdown: make(map[string]uint64),
 	}
@@ -85,9 +88,5 @@ func (llm *Base) Status() (pb.StatusResponse, error) {
 			mud.Breakdown["gopsutil-RSS"] = memInfo.RSS
 		}
 	}
-
-	return pb.StatusResponse{
-		State:  llm.State,
-		Memory: &mud,
-	}, nil
+	return &mud
 }

pkg/grpc/base/singlethread.go

@@ -0,0 +1,52 @@
+package base
+
+import (
+	"sync"
+
+	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
+)
+
+// SingleThread are backends that does not support multiple requests.
+// There will be only one request being served at the time.
+// This is useful for models that are not thread safe and cannot run
+// multiple requests at the same time.
+type SingleThread struct {
+	Base
+	backendBusy sync.Mutex
+}
+
+// Locking returns true if the backend needs to lock resources
+func (llm *SingleThread) Locking() bool {
+	return true
+}
+
+func (llm *SingleThread) Lock() {
+	llm.backendBusy.Lock()
+}
+
+func (llm *SingleThread) Unlock() {
+	llm.backendBusy.Unlock()
+}
+
+func (llm *SingleThread) Busy() bool {
+	r := llm.backendBusy.TryLock()
+	if r {
+		llm.backendBusy.Unlock()
+	}
+	return r
+}
+
+// backends may wish to call this to capture the gopsutil info, then enhance with additional memory usage details?
+func (llm *SingleThread) Status() (pb.StatusResponse, error) {
+	mud := memoryUsage()
+
+	state := pb.StatusResponse_READY
+	if llm.Busy() {
+		state = pb.StatusResponse_BUSY
+	}
+
+	return pb.StatusResponse{
+		State:  state,
+		Memory: mud,
+	}, nil
+}

pkg/grpc/client.go

@@ -7,8 +7,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-skynet/LocalAI/api/schema"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 )
@@ -158,7 +158,7 @@ func (c *Client) TTS(ctx context.Context, in *pb.TTSRequest, opts ...grpc.CallOp
 	return client.TTS(ctx, in, opts...)
 }
 
-func (c *Client) AudioTranscription(ctx context.Context, in *pb.TranscriptRequest, opts ...grpc.CallOption) (*api.Result, error) {
+func (c *Client) AudioTranscription(ctx context.Context, in *pb.TranscriptRequest, opts ...grpc.CallOption) (*schema.Result, error) {
 	c.setBusy(true)
 	defer c.setBusy(false)
 	conn, err := grpc.Dial(c.address, grpc.WithTransportCredentials(insecure.NewCredentials()))
@@ -171,14 +171,14 @@ func (c *Client) AudioTranscription(ctx context.Context, in *pb.TranscriptReques
 	if err != nil {
 		return nil, err
 	}
-	tresult := &api.Result{}
+	tresult := &schema.Result{}
 	for _, s := range res.Segments {
 		tks := []int{}
 		for _, t := range s.Tokens {
 			tks = append(tks, int(t))
 		}
 		tresult.Segments = append(tresult.Segments,
-			api.Segment{
+			schema.Segment{
 				Text:   s.Text,
 				Id:     int(s.Id),
 				Start:  time.Duration(s.Start),

pkg/grpc/interface.go

@@ -1,18 +1,21 @@
 package grpc
 
 import (
+	"github.com/go-skynet/LocalAI/api/schema"
 	pb "github.com/go-skynet/LocalAI/pkg/grpc/proto"
-	"github.com/go-skynet/LocalAI/pkg/grpc/whisper/api"
 )
 
 type LLM interface {
 	Busy() bool
+	Lock()
+	Unlock()
+	Locking() bool
 	Predict(*pb.PredictOptions) (string, error)
 	PredictStream(*pb.PredictOptions, chan string) error
 	Load(*pb.ModelOptions) error
 	Embeddings(*pb.PredictOptions) ([]float32, error)
 	GenerateImage(*pb.GenerateImageRequest) error
-	AudioTranscription(*pb.TranscriptRequest) (api.Result, error)
+	AudioTranscription(*pb.TranscriptRequest) (schema.Result, error)
 	TTS(*pb.TTSRequest) error
 	TokenizeString(*pb.PredictOptions) (pb.TokenizationResponse, error)
 	Status() (pb.StatusResponse, error)

pkg/grpc/server.go

@@ -30,6 +30,10 @@ func (s *server) Health(ctx context.Context, in *pb.HealthMessage) (*pb.Reply, e
 }
 
 func (s *server) Embedding(ctx context.Context, in *pb.PredictOptions) (*pb.EmbeddingResult, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	embeds, err := s.llm.Embeddings(in)
 	if err != nil {
 		return nil, err
@@ -39,6 +43,10 @@ func (s *server) Embedding(ctx context.Context, in *pb.PredictOptions) (*pb.Embe
 }
 
 func (s *server) LoadModel(ctx context.Context, in *pb.ModelOptions) (*pb.Result, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	err := s.llm.Load(in)
 	if err != nil {
 		return &pb.Result{Message: fmt.Sprintf("Error loading model: %s", err.Error()), Success: false}, err
@@ -47,11 +55,19 @@ func (s *server) LoadModel(ctx context.Context, in *pb.ModelOptions) (*pb.Result
 }
 
 func (s *server) Predict(ctx context.Context, in *pb.PredictOptions) (*pb.Reply, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	result, err := s.llm.Predict(in)
 	return newReply(result), err
 }
 
 func (s *server) GenerateImage(ctx context.Context, in *pb.GenerateImageRequest) (*pb.Result, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	err := s.llm.GenerateImage(in)
 	if err != nil {
 		return &pb.Result{Message: fmt.Sprintf("Error generating image: %s", err.Error()), Success: false}, err
@@ -60,6 +76,10 @@ func (s *server) GenerateImage(ctx context.Context, in *pb.GenerateImageRequest)
 }
 
 func (s *server) TTS(ctx context.Context, in *pb.TTSRequest) (*pb.Result, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	err := s.llm.TTS(in)
 	if err != nil {
 		return &pb.Result{Message: fmt.Sprintf("Error generating audio: %s", err.Error()), Success: false}, err
@@ -68,6 +88,10 @@ func (s *server) TTS(ctx context.Context, in *pb.TTSRequest) (*pb.Result, error)
 }
 
 func (s *server) AudioTranscription(ctx context.Context, in *pb.TranscriptRequest) (*pb.TranscriptResult, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	result, err := s.llm.AudioTranscription(in)
 	if err != nil {
 		return nil, err
@@ -93,7 +117,10 @@ func (s *server) AudioTranscription(ctx context.Context, in *pb.TranscriptReques
 }
 
 func (s *server) PredictStream(in *pb.PredictOptions, stream pb.Backend_PredictStreamServer) error {
-
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	resultChan := make(chan string)
 
 	done := make(chan bool)
@@ -111,6 +138,10 @@ func (s *server) PredictStream(in *pb.PredictOptions, stream pb.Backend_PredictS
 }
 
 func (s *server) TokenizeString(ctx context.Context, in *pb.PredictOptions) (*pb.TokenizationResponse, error) {
+	if s.llm.Locking() {
+		s.llm.Lock()
+		defer s.llm.Unlock()
+	}
 	res, err := s.llm.TokenizeString(in)
 	if err != nil {
 		return nil, err