Add log probs extractor

4 files changed, 355 insertions, 35 deletions

diff --git a/llm/cmd/eval/logprobs.go b/llm/cmd/eval/logprobs.go
new file mode 100644
index 0000000..eaa7459
--- /dev/null
+++ b/llm/cmd/eval/logprobs.go
@@ -0,0 +1,177 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"log"
+	"math"
+	"slices"
+	"sync"
+
+	_ "github.com/duckdb/duckdb-go/v2"
+
+	"go.jknobloc.com/x/llm"
+)
+
+type logProb struct {
+	document int
+	token    int
+	value    float32
+	offset   int
+}
+
+type logProbs []logProb
+
+func logprobs() {
+	d := data()
+	m := model()
+	t := tokenizer()
+
+	e := llm.NewEvaluator[logProbs]()
+
+	e.SetTokenizer(t)
+	e.AddModel(m)
+
+	e.SetCallback(func(j llm.Job, logits [][]float32, tokens []int) logProbs {
+		probs := selectLogProbs(logits, tokens)
+
+		r := make(logProbs, len(tokens))
+
+		for i, token := range tokens {
+			r[i] = logProb{
+				document: j.Document,
+				token:    token,
+				value:    probs[i],
+				offset:   i,
+			}
+		}
+
+		return r
+	})
+
+	var insertStmt *sql.Stmt
+
+	if stmt, db, err := prepare("logprobs.db?access_mode=READ_WRITE"); err != nil {
+		log.Fatal(err)
+	} else {
+		insertStmt = stmt
+
+		defer db.Close()
+		defer stmt.Close()
+	}
+
+	results := e.Results()
+
+	var wg sync.WaitGroup
+	var writeErr error
+
+	wg.Add(1)
+
+	go func() {
+		defer wg.Done()
+
+		for r := range results {
+			for _, l := range r {
+				if err := insert(insertStmt, l); err != nil {
+					writeErr = err
+
+					return
+				}
+			}
+		}
+	}()
+
+	if err := e.Run(d, 1024, 512); err != nil {
+		log.Fatal(err)
+	}
+
+	wg.Wait()
+
+	if writeErr != nil {
+		log.Fatal(writeErr)
+	}
+}
+
+func prepare(name string) (*sql.Stmt, *sql.DB, error) {
+	var db *sql.DB
+
+	if database, err := sql.Open("duckdb", name); err != nil {
+		return nil, nil, err
+	} else {
+		db = database
+	}
+
+	if err := db.Ping(); err != nil {
+		_ = db.Close()
+
+		return nil, nil, err
+	}
+
+	queryCreate := "CREATE TABLE context(uid INTEGER, token INTEGER, logProb FLOAT, pos INTEGER)"
+
+	if _, err := db.ExecContext(context.Background(), queryCreate); err != nil {
+		_ = db.Close()
+
+		return nil, nil, err
+	}
+
+	var stmt *sql.Stmt
+
+	queryInsert := "INSERT INTO context VALUES(?, ?, ?, ?)"
+
+	if statement, err := db.PrepareContext(context.Background(), queryInsert); err != nil {
+		_ = db.Close()
+
+		return nil, nil, err
+	} else {
+		stmt = statement
+	}
+
+	return stmt, db, nil
+}
+
+func insert(stmt *sql.Stmt, prob logProb) error {
+	if _, err := stmt.ExecContext(context.Background(), prob.document, prob.token, prob.value, prob.offset); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func selectLogProbs(logits [][]float32, tokens []int) []float32 {
+	if len(logits) != len(tokens) {
+		panic("length mismatch")
+	}
+
+	r := make([]float32, len(tokens))
+
+	for i, token := range tokens {
+		logprobs := logSoftmax(logits[i])
+
+		r[i] = logprobs[token]
+	}
+
+	return r
+}
+
+func logSoftmax(logits []float32) []float32 {
+	m := slices.Max(logits)
+
+	s := float32(0.0)
+	r := make([]float32, len(logits))
+
+	for i, v := range logits {
+		e := float32(math.Exp(float64(v - m)))
+
+		r[i] = v
+		s += e
+	}
+
+	lse := float32(math.Log(float64(s))) + m
+
+	for i := range r {
+		r[i] -= lse
+	}
+
+	return r
+}
diff --git a/llm/cmd/eval/main.go b/llm/cmd/eval/main.go
index 05b3f96..758adad 100644
--- a/llm/cmd/eval/main.go
+++ b/llm/cmd/eval/main.go
@@ -11,6 +11,7 @@ import (
 
 func main() {
 	perplexity()
+	// logprobs()
 }
 
 func data() *dataset.ParquetReader {
diff --git a/llm/go.mod b/llm/go.mod
index 8e1813c..5e8f995 100644
--- a/llm/go.mod
+++ b/llm/go.mod
@@ -2,20 +2,59 @@ module go.jknobloc.com/x/llm
 
 go 1.25.0
 
-require github.com/jonasknobloch/mbpe v0.1.1
+require (
+	github.com/duckdb/duckdb-go/v2 v2.10500.0
+	github.com/jonasknobloch/mbpe v0.1.1
+	go.jknobloc.com/x/dataset v0.0.0-20260316162507-b3c48d34e3b5
+	go.jknobloc.com/x/gpt2 v0.0.0-20260316162507-b3c48d34e3b5
+	go.jknobloc.com/x/tui v0.0.0-20260316162507-b3c48d34e3b5
+)
 
 require (
+	codeberg.org/go-fonts/liberation v0.5.0 // indirect
+	codeberg.org/go-latex/latex v0.1.0 // indirect
+	codeberg.org/go-pdf/fpdf v0.10.0 // indirect
 	git.sr.ht/~sbinet/gg v0.6.0 // indirect
 	github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b // indirect
+	github.com/andybalholm/brotli v1.2.0 // indirect
+	github.com/apache/arrow-go/v18 v18.5.1 // indirect
+	github.com/apache/thrift v0.22.0 // indirect
 	github.com/campoy/embedmd v1.0.0 // indirect
-	github.com/go-fonts/liberation v0.3.3 // indirect
-	github.com/go-latex/latex v0.0.0-20240709081214-31cef3c7570e // indirect
-	github.com/go-pdf/fpdf v0.9.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/duckdb/duckdb-go-bindings v0.10500.0 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10500.0 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10500.0 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10500.0 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10500.0 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10500.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/image v0.24.0 // indirect
-	golang.org/x/text v0.22.0 // indirect
-	gonum.org/v1/gonum v0.15.1 // indirect
-	gonum.org/v1/plot v0.15.0 // indirect
-	google.golang.org/protobuf v1.36.5 // indirect
+	github.com/golang/snappy v1.0.0 // indirect
+	github.com/google/flatbuffers v25.12.19+incompatible // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/asmfmt v1.3.2 // indirect
+	github.com/klauspost/compress v1.18.3 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 // indirect
+	github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3 // indirect
+	github.com/pierrec/lz4/v4 v4.1.25 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/yalue/onnxruntime_go v1.25.0 // indirect
+	github.com/zeebo/xxh3 v1.1.0 // indirect
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
+	golang.org/x/image v0.25.0 // indirect
+	golang.org/x/mod v0.32.0 // indirect
+	golang.org/x/net v0.49.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/telemetry v0.0.0-20260116145544-c6413dc483f5 // indirect
+	golang.org/x/text v0.33.0 // indirect
+	golang.org/x/tools v0.41.0 // indirect
+	golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da // indirect
+	gonum.org/v1/gonum v0.16.0 // indirect
+	gonum.org/v1/plot v0.15.2 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda // indirect
+	google.golang.org/grpc v1.78.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
 )
diff --git a/llm/go.sum b/llm/go.sum
index 84cbf68..4875000 100644
--- a/llm/go.sum
+++ b/llm/go.sum
@@ -1,3 +1,13 @@
+codeberg.org/go-fonts/dejavu v0.4.0 h1:2yn58Vkh4CFK3ipacWUAIE3XVBGNa0y1bc95Bmfx91I=
+codeberg.org/go-fonts/dejavu v0.4.0/go.mod h1:abni088lmhQJvso2Lsb7azCKzwkfcnttl6tL1UTWKzg=
+codeberg.org/go-fonts/latin-modern v0.4.0 h1:vkRCc1y3whKA7iL9Ep0fSGVuJfqjix0ica9UflHORO8=
+codeberg.org/go-fonts/latin-modern v0.4.0/go.mod h1:BF68mZznJ9QHn+hic9ks2DaFl4sR5YhfM6xTYaP9vNw=
+codeberg.org/go-fonts/liberation v0.5.0 h1:SsKoMO1v1OZmzkG2DY+7ZkCL9U+rrWI09niOLfQ5Bo0=
+codeberg.org/go-fonts/liberation v0.5.0/go.mod h1:zS/2e1354/mJ4pGzIIaEtm/59VFCFnYC7YV6YdGl5GU=
+codeberg.org/go-latex/latex v0.1.0 h1:hoGO86rIbWVyjtlDLzCqZPjNykpWQ9YuTZqAzPcfL3c=
+codeberg.org/go-latex/latex v0.1.0/go.mod h1:LA0q/AyWIYrqVd+A9Upkgsb+IqPcmSTKc9Dny04MHMw=
+codeberg.org/go-pdf/fpdf v0.10.0 h1:u+w669foDDx5Ds43mpiiayp40Ov6sZalgcPMDBcZRd4=
+codeberg.org/go-pdf/fpdf v0.10.0/go.mod h1:Y0DGRAdZ0OmnZPvjbMp/1bYxmIPxm0ws4tfoPOc4LjU=
 git.sr.ht/~sbinet/cmpimg v0.1.0 h1:E0zPRk2muWuCqSKSVZIWsgtU9pjsw3eKHi8VmQeScxo=
 git.sr.ht/~sbinet/cmpimg v0.1.0/go.mod h1:FU12psLbF4TfNXkKH2ZZQ29crIqoiqTZmeQ7dkp/pxE=
 git.sr.ht/~sbinet/gg v0.6.0 h1:RIzgkizAk+9r7uPzf/VfbJHBMKUr0F5hRFxTUGMnt38=
@@ -7,63 +17,156 @@ github.com/ajstarks/deck v0.0.0-20200831202436-30c9fc6549a9/go.mod h1:JynElWSGnm
 github.com/ajstarks/deck/generate v0.0.0-20210309230005-c3f852c02e19/go.mod h1:T13YZdzov6OU0A1+RfKZiZN9ca6VeKdBdyDV+BY97Tk=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b h1:slYM766cy2nI3BwyRiyQj/Ud48djTMtMebDqepE95rw=
 github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b/go.mod h1:1KcenG0jGWcpt8ov532z81sp/kMMUG485J2InIOyADM=
+github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
+github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
+github.com/apache/arrow-go/v18 v18.5.1 h1:yaQ6zxMGgf9YCYw4/oaeOU3AULySDlAYDOcnr4LdHdI=
+github.com/apache/arrow-go/v18 v18.5.1/go.mod h1:OCCJsmdq8AsRm8FkBSSmYTwL/s4zHW9CqxeBxEytkNE=
+github.com/apache/thrift v0.22.0 h1:r7mTJdj51TMDe6RtcmNdQxgn9XcyfGDOzegMDRg47uc=
+github.com/apache/thrift v0.22.0/go.mod h1:1e7J/O1Ae6ZQMTYdy9xa3w9k+XHWPfRvdPyJeynQ+/g=
 github.com/campoy/embedmd v1.0.0 h1:V4kI2qTJJLf4J29RzI/MAt2c3Bl4dQSYPuflzwFH2hY=
 github.com/campoy/embedmd v1.0.0/go.mod h1:oxyr9RCiSXg0M3VJ3ks0UGfp98BpSSGr0kpiX3MzVl8=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dlclark/regexp2 v1.11.5 h1:Q/sSnsKerHeCkc/jSTNq1oCm7KiVgUMZRDUoRu0JQZQ=
 github.com/dlclark/regexp2 v1.11.5/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/go-fonts/dejavu v0.3.4 h1:Qqyx9IOs5CQFxyWTdvddeWzrX0VNwUAvbmAzL0fpjbc=
-github.com/go-fonts/dejavu v0.3.4/go.mod h1:D1z0DglIz+lmpeNYMYlxW4r22IhcdOYnt+R3PShU/Kg=
-github.com/go-fonts/latin-modern v0.3.3 h1:g2xNgI8yzdNzIVm+qvbMryB6yGPe0pSMss8QT3QwlJ0=
-github.com/go-fonts/latin-modern v0.3.3/go.mod h1:tHaiWDGze4EPB0Go4cLT5M3QzRY3peya09Z/8KSCrpY=
-github.com/go-fonts/liberation v0.3.3 h1:tM/T2vEOhjia6v5krQu8SDDegfH1SfXVRUNNKpq0Usk=
-github.com/go-fonts/liberation v0.3.3/go.mod h1:eUAzNRuJnpSnd1sm2EyloQfSOT79pdw7X7++Ri+3MCU=
-github.com/go-latex/latex v0.0.0-20240709081214-31cef3c7570e h1:xcdj0LWnMSIU1j8+jIeJyfvk6SjgJedFQssSqFthJ2E=
-github.com/go-latex/latex v0.0.0-20240709081214-31cef3c7570e/go.mod h1:J4SAGzkcl+28QWi7yz72tyC/4aGnppOvya+AEv4TaAQ=
-github.com/go-pdf/fpdf v0.9.0 h1:PPvSaUuo1iMi9KkaAn90NuKi+P4gwMedWPHhj8YlJQw=
-github.com/go-pdf/fpdf v0.9.0/go.mod h1:oO8N111TkmKb9D7VvWGLvLJlaZUQVPM+6V42pp3iV4Y=
+github.com/duckdb/duckdb-go-bindings v0.10500.0 h1:xvYsvKVBPvl9rk1Z0W1LYHnZPGQsKxuNU2YUWlEHBJg=
+github.com/duckdb/duckdb-go-bindings v0.10500.0/go.mod h1:fjqSNEOmzfXbuszjb9tJBQjjC61KLCHM5Cy8tghENWc=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10500.0 h1:ugUBH5e9c7F/3X14F2eXvaG9+hCdQtv2GZZ35AD+ai4=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10500.0/go.mod h1:EnAvZh1kNJHp5yF+M1ZHNEvapnmt6anq1xXHVrAGqMo=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10500.0 h1:8/J5noOOvIohkNaDFDMr5eYqk8bCRwkEUfGxi8QwsAg=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10500.0/go.mod h1:IGLSeEcFhNeZF16aVjQCULD7TsFZKG5G7SyKJAXKp5c=
+github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10500.0 h1:Wf2rKNI/fGY9nlqb6zPAeiv27DGxgC34RpglkMeQhis=
+github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10500.0/go.mod h1:KAIynZ0GHCS7X5fRyuFnQMg/SZBPK/bS9OCOVojClxw=
+github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10500.0 h1:Ktea0Z993M26LLfCIu+dQbPS+AnyvVSFxZpEm8UbNu4=
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+github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10500.0 h1:6ZUdeqS5oWAJBELJbRMs1d6U5yXYmzH3vNkiH+qIU2U=
+github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10500.0/go.mod h1:K25pJL26ARblGDeuAkrdblFvUen92+CwksLtPEHRqqQ=
+github.com/duckdb/duckdb-go/v2 v2.10500.0 h1:fINiqzIVyZYCuOeA1JZlT6xFXsDOM8DHMOXV+WEaYDY=
+github.com/duckdb/duckdb-go/v2 v2.10500.0/go.mod h1:0VI/sNb61DMuNLWR4kPh6AjPGnnhlKjuefcmrskXurY=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/go-viper/mapstructure/v2 v2.5.0 h1:vM5IJoUAy3d7zRSVtIwQgBj7BiWtMPfmPEgAXnvj1Ro=
+github.com/go-viper/mapstructure/v2 v2.5.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
+github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/golang/snappy v1.0.0 h1:Oy607GVXHs7RtbggtPBnr2RmDArIsAefDwvrdWvRhGs=
+github.com/golang/snappy v1.0.0/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/flatbuffers v25.12.19+incompatible h1:haMV2JRRJCe1998HeW/p0X9UaMTK6SDo0ffLn2+DbLs=
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