wip: write tensors in parallel

cmd/cmd.go

@@ -22,6 +22,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"sync"
 	"sync/atomic"
 	"syscall"
 	"time"
@@ -31,6 +32,7 @@ import (
 	"github.com/olekukonko/tablewriter"
 	"github.com/spf13/cobra"
 	"golang.org/x/crypto/ssh"
+	"golang.org/x/sync/errgroup"
 	"golang.org/x/term"
 
 	"github.com/ollama/ollama/api"
@@ -106,7 +108,7 @@ func CreateHandler(cmd *cobra.Command, args []string) error {
 	}
 	spinner.Stop()
 
-	req.Name = args[0]
+	req.Model = args[0]
 	quantize, _ := cmd.Flags().GetString("quantize")
 	if quantize != "" {
 		req.Quantize = quantize
@@ -117,26 +119,43 @@ func CreateHandler(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	if len(req.Files) > 0 {
-		fileMap := map[string]string{}
-		for f, digest := range req.Files {
+	var mu sync.Mutex
+	var g errgroup.Group
+	g.SetLimit(max(runtime.GOMAXPROCS(0)-1, 1))
+	// copy files since we'll be modifying the map
+	temp := req.Files
+	req.Files = make(map[string]string, len(temp))
+	for f, digest := range temp {
+		g.Go(func() error {
 			if _, err := createBlob(cmd, client, f, digest, p); err != nil {
 				return err
 			}
-			fileMap[filepath.Base(f)] = digest
-		}
-		req.Files = fileMap
+
+			mu.Lock()
+			req.Files[filepath.Base(f)] = digest
+			mu.Unlock()
+			return nil
+		})
 	}
 
-	if len(req.Adapters) > 0 {
-		fileMap := map[string]string{}
-		for f, digest := range req.Adapters {
+	// copy files since we'll be modifying the map
+	temp = req.Adapters
+	req.Adapters = make(map[string]string, len(temp))
+	for f, digest := range temp {
+		g.Go(func() error {
 			if _, err := createBlob(cmd, client, f, digest, p); err != nil {
 				return err
 			}
-			fileMap[filepath.Base(f)] = digest
-		}
-		req.Adapters = fileMap
+
+			mu.Lock()
+			req.Adapters[filepath.Base(f)] = digest
+			mu.Unlock()
+			return nil
+		})
+	}
+
+	if err := g.Wait(); err != nil {
+		return err
 	}
 
 	bars := make(map[string]*progress.Bar)
@@ -213,7 +232,7 @@ func createBlob(cmd *cobra.Command, client *api.Client, path string, digest stri
 		}
 	}()
 
-	if err = client.CreateBlob(cmd.Context(), digest, io.TeeReader(bin, &pw)); err != nil {
+	if err := client.CreateBlob(cmd.Context(), digest, io.TeeReader(bin, &pw)); err != nil {
 		return "", err
 	}
 	return digest, nil

cmd/cmd_test.go

@@ -690,7 +690,7 @@ func TestCreateHandler(t *testing.T) {
 						return
 					}
 
-					if req.Name != "test-model" {
+					if req.Model != "test-model" {
 						t.Errorf("expected model name 'test-model', got %s", req.Name)
 					}
 

convert/convert.go

@@ -4,9 +4,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io"
 	"io/fs"
 	"log/slog"
+	"os"
 	"strings"
 
 	"github.com/ollama/ollama/fs/ggml"
@@ -84,12 +84,12 @@ func (ModelParameters) specialTokenTypes() []string {
 	}
 }
 
-func (ModelParameters) writeFile(ws io.WriteSeeker, kv ggml.KV, ts []ggml.Tensor) error {
-	return ggml.WriteGGUF(ws, kv, ts)
+func (ModelParameters) writeFile(f *os.File, kv ggml.KV, ts []ggml.Tensor) error {
+	return ggml.WriteGGUF(f, kv, ts)
 }
 
-func (AdapterParameters) writeFile(ws io.WriteSeeker, kv ggml.KV, ts []ggml.Tensor) error {
-	return ggml.WriteGGUF(ws, kv, ts)
+func (AdapterParameters) writeFile(f *os.File, kv ggml.KV, ts []ggml.Tensor) error {
+	return ggml.WriteGGUF(f, kv, ts)
 }
 
 type ModelConverter interface {
@@ -104,7 +104,7 @@ type ModelConverter interface {
 	// specialTokenTypes returns any special token types the model uses
 	specialTokenTypes() []string
 	// writeFile writes the model to the provided io.WriteSeeker
-	writeFile(io.WriteSeeker, ggml.KV, []ggml.Tensor) error
+	writeFile(*os.File, ggml.KV, []ggml.Tensor) error
 }
 
 type moreParser interface {
@@ -120,10 +120,10 @@ type AdapterConverter interface {
 	// See [strings.Replacer](https://pkg.go.dev/strings#Replacer) for details
 	Replacements() []string
 
-	writeFile(io.WriteSeeker, ggml.KV, []ggml.Tensor) error
+	writeFile(*os.File, ggml.KV, []ggml.Tensor) error
 }
 
-func ConvertAdapter(fsys fs.FS, ws io.WriteSeeker, baseKV ggml.KV) error {
+func ConvertAdapter(fsys fs.FS, f *os.File, baseKV ggml.KV) error {
 	bts, err := fs.ReadFile(fsys, "adapter_config.json")
 	if err != nil {
 		return err
@@ -158,14 +158,14 @@ func ConvertAdapter(fsys fs.FS, ws io.WriteSeeker, baseKV ggml.KV) error {
 		return err
 	}
 
-	return conv.writeFile(ws, conv.KV(baseKV), conv.Tensors(ts))
+	return conv.writeFile(f, conv.KV(baseKV), conv.Tensors(ts))
 }
 
 // Convert writes an Ollama compatible model to the provided io.WriteSeeker based on configurations
 // and files it finds in the input path.
 // Supported input model formats include safetensors.
 // Supported input tokenizers files include tokenizer.json (preferred) and tokenizer.model.
-func ConvertModel(fsys fs.FS, ws io.WriteSeeker) error {
+func ConvertModel(fsys fs.FS, f *os.File) error {
 	bts, err := fs.ReadFile(fsys, "config.json")
 	if err != nil {
 		return err
@@ -248,5 +248,5 @@ func ConvertModel(fsys fs.FS, ws io.WriteSeeker) error {
 		return err
 	}
 
-	return conv.writeFile(ws, conv.KV(t), conv.Tensors(ts))
+	return conv.writeFile(f, conv.KV(t), conv.Tensors(ts))
 }

fs/ggml/gguf.go

@@ -9,8 +9,12 @@ import (
 	"io"
 	"log/slog"
 	"maps"
+	"os"
+	"runtime"
 	"slices"
 	"strings"
+
+	"golang.org/x/sync/errgroup"
 )
 
 type containerGGUF struct {
@@ -502,22 +506,22 @@ func writeGGUFArray[S ~[]E, E any](w io.Writer, t uint32, s S) error {
 	return binary.Write(w, binary.LittleEndian, s)
 }
 
-func WriteGGUF(ws io.WriteSeeker, kv KV, ts []Tensor) error {
+func WriteGGUF(f *os.File, kv KV, ts []Tensor) error {
 	alignment := kv.Uint("general.alignment", 32)
 
-	if err := binary.Write(ws, binary.LittleEndian, []byte("GGUF")); err != nil {
+	if err := binary.Write(f, binary.LittleEndian, []byte("GGUF")); err != nil {
 		return err
 	}
 
-	if err := binary.Write(ws, binary.LittleEndian, uint32(3)); err != nil {
+	if err := binary.Write(f, binary.LittleEndian, uint32(3)); err != nil {
 		return err
 	}
 
-	if err := binary.Write(ws, binary.LittleEndian, uint64(len(ts))); err != nil {
+	if err := binary.Write(f, binary.LittleEndian, uint64(len(ts))); err != nil {
 		return err
 	}
 
-	if err := binary.Write(ws, binary.LittleEndian, uint64(len(kv))); err != nil {
+	if err := binary.Write(f, binary.LittleEndian, uint64(len(kv))); err != nil {
 		return err
 	}
 
@@ -525,7 +529,7 @@ func WriteGGUF(ws io.WriteSeeker, kv KV, ts []Tensor) error {
 	slices.Sort(keys)
 
 	for _, key := range keys {
-		if err := ggufWriteKV(ws, key, kv[key]); err != nil {
+		if err := ggufWriteKV(f, key, kv[key]); err != nil {
 			return err
 		}
 	}
@@ -541,21 +545,34 @@ func WriteGGUF(ws io.WriteSeeker, kv KV, ts []Tensor) error {
 	})
 
 	var s uint64
-	for _, t := range ts {
-		t.Offset = s + uint64(ggufPadding(int64(s), int64(alignment)))
-		if err := ggufWriteTensorInfo(ws, t); err != nil {
+	for i := range ts {
+		ts[i].Offset = s + uint64(ggufPadding(int64(s), int64(alignment)))
+		if err := ggufWriteTensorInfo(f, ts[i]); err != nil {
 			return err
 		}
-		s += t.Size()
+		s += ts[i].Size()
 	}
 
+	offset, err := f.Seek(0, io.SeekCurrent)
+	if err != nil {
+		return err
+	}
+
+	offset += ggufPadding(offset, int64(alignment))
+	slog.Debug("gguf", "offset", offset, "size", s, "alignment", alignment)
+
+	var g errgroup.Group
+	g.SetLimit(runtime.GOMAXPROCS(0))
 	for _, t := range ts {
-		if err := ggufWriteTensor(ws, t, int64(alignment)); err != nil {
+		t := t
+		w := io.NewOffsetWriter(f, offset+int64(t.Offset))
+		g.Go(func() error {
+			_, err := t.WriteTo(w)
 			return err
-		}
+		})
 	}
 
-	return nil
+	return g.Wait()
 }
 
 func ggufWriteKV(ws io.WriteSeeker, k string, v any) error {
@@ -640,20 +657,6 @@ func ggufWriteTensorInfo(ws io.WriteSeeker, t Tensor) error {
 	return binary.Write(ws, binary.LittleEndian, t.Offset)
 }
 
-func ggufWriteTensor(ws io.WriteSeeker, t Tensor, alignment int64) error {
-	offset, err := ws.Seek(0, io.SeekCurrent)
-	if err != nil {
-		return err
-	}
-
-	if err := binary.Write(ws, binary.LittleEndian, bytes.Repeat([]byte{0}, int(ggufPadding(offset, alignment)))); err != nil {
-		return err
-	}
-
-	_, err = t.WriteTo(ws)
-	return err
-}
-
 func ggufPadding(offset, align int64) int64 {
 	return (align - offset%align) % align
 }

progress/bar.go

@@ -64,7 +64,7 @@ func formatDuration(d time.Duration) string {
 func (b *Bar) String() string {
 	termWidth, _, err := term.GetSize(int(os.Stderr.Fd()))
 	if err != nil {
-		termWidth = 80
+		termWidth = defaultTermWidth
 	}
 
 	var pre strings.Builder

progress/progress.go

@@ -4,8 +4,16 @@ import (
 	"bufio"
 	"fmt"
 	"io"
+	"os"
 	"sync"
 	"time"
+
+	"golang.org/x/term"
+)
+
+const (
+	defaultTermWidth  = 80
+	defaultTermHeight = 24
 )
 
 type State interface {
@@ -83,6 +91,11 @@ func (p *Progress) Add(key string, state State) {
 }
 
 func (p *Progress) render() {
+	_, termHeight, err := term.GetSize(int(os.Stderr.Fd()))
+	if err != nil {
+		termHeight = defaultTermHeight
+	}
+
 	p.mu.Lock()
 	defer p.mu.Unlock()
 
@@ -102,8 +115,9 @@ func (p *Progress) render() {
 	fmt.Fprint(p.w, "\033[1G")
 
 	// render progress lines
-	for i, state := range p.states {
-		fmt.Fprint(p.w, state.String(), "\033[K")
+	maxHeight := min(len(p.states), termHeight)
+	for i := len(p.states) - maxHeight; i < len(p.states); i++ {
+		fmt.Fprint(p.w, p.states[i].String(), "\033[K")
 		if i < len(p.states)-1 {
 			fmt.Fprint(p.w, "\n")
 		}