251 lines
6.8 KiB
Go
251 lines
6.8 KiB
Go
package llm
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import (
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"errors"
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"fmt"
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"golang.org/x/exp/slices"
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"io"
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"io/fs"
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"log"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/jmorganca/ollama/gpu"
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)
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// Libraries names may contain an optional variant separated by '_'
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// For example, "rocm_v6" and "rocm_v5" or "cpu" and "cpu_avx2"
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// Any library without a variant is the lowest common denominator
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var availableDynLibs = map[string]string{}
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const pathComponentCount = 6
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// getDynLibs returns an ordered list of LLM libraries to try, starting with the best
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func getDynLibs(gpuInfo gpu.GpuInfo) []string {
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// Short circuit if we know we're using the default built-in (darwin only)
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if gpuInfo.Library == "default" {
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return []string{"default"}
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}
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// TODO - temporary until we have multiple CPU variations for Darwin
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// Short circuit on darwin with metal only
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if len(availableDynLibs) == 1 {
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if _, onlyMetal := availableDynLibs["metal"]; onlyMetal {
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return []string{availableDynLibs["metal"]}
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}
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}
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exactMatch := ""
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dynLibs := []string{}
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altDynLibs := []string{}
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requested := gpuInfo.Library
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if gpuInfo.Variant != "" {
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requested += "_" + gpuInfo.Variant
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}
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// Try to find an exact match
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for cmp := range availableDynLibs {
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if requested == cmp {
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exactMatch = cmp
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dynLibs = []string{availableDynLibs[cmp]}
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break
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}
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}
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// Then for GPUs load alternates and sort the list for consistent load ordering
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if gpuInfo.Library != "cpu" {
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for cmp := range availableDynLibs {
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if gpuInfo.Library == strings.Split(cmp, "_")[0] && cmp != exactMatch {
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altDynLibs = append(altDynLibs, cmp)
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}
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}
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slices.Sort(altDynLibs)
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for _, altDynLib := range altDynLibs {
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dynLibs = append(dynLibs, availableDynLibs[altDynLib])
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}
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}
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// Load up the best CPU variant if not primary requested
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if gpuInfo.Library != "cpu" {
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variant := gpu.GetCPUVariant()
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// If no variant, then we fall back to default
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// If we have a variant, try that if we find an exact match
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// Attempting to run the wrong CPU instructions will panic the
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// process
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if variant != "" {
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for cmp := range availableDynLibs {
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if cmp == "cpu_"+variant {
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dynLibs = append(dynLibs, availableDynLibs[cmp])
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break
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}
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}
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} else {
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dynLibs = append(dynLibs, availableDynLibs["cpu"])
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}
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}
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// Finally, if we didn't find any matches, LCD CPU FTW
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if len(dynLibs) == 0 {
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dynLibs = []string{availableDynLibs["cpu"]}
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}
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return dynLibs
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}
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func rocmDynLibPresent() bool {
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for dynLibName := range availableDynLibs {
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if strings.HasPrefix(dynLibName, "rocm") {
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return true
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}
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}
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return false
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}
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func nativeInit(workdir string) error {
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if runtime.GOOS == "darwin" {
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err := extractPayloadFiles(workdir, "llama.cpp/ggml-metal.metal")
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if err != nil {
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if err == payloadMissing {
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// TODO perhaps consider this a hard failure on arm macs?
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log.Printf("ggml-meta.metal payload missing")
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return nil
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}
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return err
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}
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os.Setenv("GGML_METAL_PATH_RESOURCES", workdir)
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}
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libs, err := extractDynamicLibs(workdir, "llama.cpp/build/*/*/lib/*")
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if err != nil {
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if err == payloadMissing {
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log.Printf("%s", payloadMissing)
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return nil
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}
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return err
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}
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for _, lib := range libs {
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// The last dir component is the variant name
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variant := filepath.Base(filepath.Dir(lib))
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availableDynLibs[variant] = lib
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}
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if err := verifyDriverAccess(); err != nil {
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return err
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}
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// Report which dynamic libraries we have loaded to assist troubleshooting
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variants := make([]string, len(availableDynLibs))
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i := 0
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for variant := range availableDynLibs {
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variants[i] = variant
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i++
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}
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log.Printf("Dynamic LLM libraries %v", variants)
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log.Printf("Override detection logic by setting OLLAMA_LLM_LIBRARY")
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return nil
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}
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func extractDynamicLibs(workDir, glob string) ([]string, error) {
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files, err := fs.Glob(libEmbed, glob)
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if err != nil || len(files) == 0 {
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return nil, payloadMissing
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}
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libs := []string{}
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for _, file := range files {
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pathComps := strings.Split(file, "/")
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if len(pathComps) != pathComponentCount {
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log.Printf("unexpected payload components: %v", pathComps)
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continue
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}
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// llama.cpp/build/$OS/$VARIANT/lib/$LIBRARY
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// Include the variant in the path to avoid conflicts between multiple server libs
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targetDir := filepath.Join(workDir, pathComps[pathComponentCount-3])
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srcFile, err := libEmbed.Open(file)
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if err != nil {
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return nil, fmt.Errorf("read payload %s: %v", file, err)
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}
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defer srcFile.Close()
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if err := os.MkdirAll(targetDir, 0o755); err != nil {
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return nil, fmt.Errorf("create payload temp dir %s: %v", workDir, err)
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}
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destFile := filepath.Join(targetDir, filepath.Base(file))
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if strings.Contains(destFile, "server") {
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libs = append(libs, destFile)
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}
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_, err = os.Stat(destFile)
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switch {
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case errors.Is(err, os.ErrNotExist):
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destFile, err := os.OpenFile(destFile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o755)
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if err != nil {
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return nil, fmt.Errorf("write payload %s: %v", file, err)
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}
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defer destFile.Close()
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if _, err := io.Copy(destFile, srcFile); err != nil {
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return nil, fmt.Errorf("copy payload %s: %v", file, err)
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}
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case err != nil:
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return nil, fmt.Errorf("stat payload %s: %v", file, err)
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}
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}
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return libs, nil
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}
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func extractPayloadFiles(workDir, glob string) error {
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files, err := fs.Glob(libEmbed, glob)
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if err != nil || len(files) == 0 {
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return payloadMissing
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}
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for _, file := range files {
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srcFile, err := libEmbed.Open(file)
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if err != nil {
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return fmt.Errorf("read payload %s: %v", file, err)
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}
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defer srcFile.Close()
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if err := os.MkdirAll(workDir, 0o755); err != nil {
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return fmt.Errorf("create payload temp dir %s: %v", workDir, err)
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}
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destFile := filepath.Join(workDir, filepath.Base(file))
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_, err = os.Stat(destFile)
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switch {
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case errors.Is(err, os.ErrNotExist):
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destFile, err := os.OpenFile(destFile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o755)
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if err != nil {
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return fmt.Errorf("write payload %s: %v", file, err)
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}
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defer destFile.Close()
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if _, err := io.Copy(destFile, srcFile); err != nil {
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return fmt.Errorf("copy payload %s: %v", file, err)
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}
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case err != nil:
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return fmt.Errorf("stat payload %s: %v", file, err)
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}
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}
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return nil
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}
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func verifyDriverAccess() error {
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if runtime.GOOS != "linux" {
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return nil
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}
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// Only check ROCm access if we have the dynamic lib loaded
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if rocmDynLibPresent() {
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// Verify we have permissions - either running as root, or we have group access to the driver
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fd, err := os.OpenFile("/dev/kfd", os.O_RDWR, 0666)
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if err != nil {
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if errors.Is(err, fs.ErrPermission) {
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return fmt.Errorf("Radeon card detected, but permissions not set up properly. Either run ollama as root, or add you user account to the render group.")
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} else if errors.Is(err, fs.ErrNotExist) {
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// expected behavior without a radeon card
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return nil
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}
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return fmt.Errorf("failed to check permission on /dev/kfd: %w", err)
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}
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fd.Close()
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}
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return nil
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}
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