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Unverified Commit 8bcb3125 authored by Jeffrey Morgan's avatar Jeffrey Morgan Committed by GitHub
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benchmark: remove unused benchmark test (#11120) 

Removes a test under benchmark/ that is unused
parent 6baf1e31
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benchmark/server_benchmark_test.go deleted 100644 → 0
View file @ 6baf1e31
package benchmark
import (
"context"
"flag"
"fmt"
"testing"
"time"
"github.com/ollama/ollama/api"
)
// Command line flags
var modelFlag string
func init() {
flag.StringVar(&modelFlag, "m", "", "Name of the model to benchmark")
flag.Lookup("m").DefValue = "model"
}
// modelName returns the model name from flags, failing the test if not set
func modelName(b *testing.B) string {
if modelFlag == "" {
b.Fatal("Error: -m flag is required for benchmark tests")
}
return modelFlag
}
type TestCase struct {
name string
prompt string
maxTokens int
}
// runGenerateBenchmark contains the common generate and metrics logic
func runGenerateBenchmark(b *testing.B, ctx context.Context, client *api.Client, req *api.GenerateRequest) {
start := time.Now()
var ttft time.Duration
var metrics api.Metrics
err := client.Generate(ctx, req, func(resp api.GenerateResponse) error {
if ttft == 0 && resp.Response != "" {
ttft = time.Since(start)
}
if resp.Done {
metrics = resp.Metrics
}
return nil
})
// Report custom metrics as part of the benchmark results
b.ReportMetric(float64(ttft.Milliseconds()), "ttft_ms")
b.ReportMetric(float64(metrics.LoadDuration.Milliseconds()), "load_ms")
// Token throughput metrics
promptThroughput := float64(metrics.PromptEvalCount) / metrics.PromptEvalDuration.Seconds()
genThroughput := float64(metrics.EvalCount) / metrics.EvalDuration.Seconds()
b.ReportMetric(promptThroughput, "prompt_tok/s")
b.ReportMetric(genThroughput, "gen_tok/s")
// Token counts
b.ReportMetric(float64(metrics.PromptEvalCount), "prompt_tokens")
b.ReportMetric(float64(metrics.EvalCount), "gen_tokens")
if err != nil {
b.Fatal(err)
}
}
// BenchmarkColdStart runs benchmarks with model loading from cold state
func BenchmarkColdStart(b *testing.B) {
client := setup(b)
tests := []TestCase{
{"short_prompt", "Write a long story", 100},
{"medium_prompt", "Write a detailed economic analysis", 500},
{"long_prompt", "Write a comprehensive AI research paper", 1000},
}
m := modelName(b)
for _, tt := range tests {
b.Run(fmt.Sprintf("%s/cold/%s", m, tt.name), func(b *testing.B) {
ctx := b.Context()
// Set number of tokens as our throughput metric
b.SetBytes(int64(tt.maxTokens))
for b.Loop() {
b.StopTimer()
// Ensure model is unloaded before each iteration
unload(client, m, b)
b.StartTimer()
req := &api.GenerateRequest{
Model: m,
Prompt: tt.prompt,
Options: map[string]any{"num_predict": tt.maxTokens, "temperature": 0.1},
}
runGenerateBenchmark(b, ctx, client, req)
}
})
}
}
// BenchmarkWarmStart runs benchmarks with pre-loaded model
func BenchmarkWarmStart(b *testing.B) {
client := setup(b)
tests := []TestCase{
{"short_prompt", "Write a long story", 100},
{"medium_prompt", "Write a detailed economic analysis", 500},
{"long_prompt", "Write a comprehensive AI research paper", 1000},
}
m := modelName(b)
for _, tt := range tests {
b.Run(fmt.Sprintf("%s/warm/%s", m, tt.name), func(b *testing.B) {
ctx := b.Context()
// Pre-warm the model
warmup(client, m, tt.prompt, b)
// Set number of tokens as our throughput metric
b.SetBytes(int64(tt.maxTokens))
for b.Loop() {
req := &api.GenerateRequest{
Model: m,
Prompt: tt.prompt,
Options: map[string]any{"num_predict": tt.maxTokens, "temperature": 0.1},
}
runGenerateBenchmark(b, ctx, client, req)
}
})
}
}
// setup verifies server and model availability
func setup(b *testing.B) *api.Client {
client, err := api.ClientFromEnvironment()
if err != nil {
b.Fatal(err)
}
if _, err := client.Show(b.Context(), &api.ShowRequest{Model: modelName(b)}); err != nil {
b.Fatalf("Model unavailable: %v", err)
}
return client
}
// warmup ensures the model is loaded and warmed up
func warmup(client *api.Client, model string, prompt string, b *testing.B) {
for range 3 {
err := client.Generate(
context.Background(),
&api.GenerateRequest{
Model: model,
Prompt: prompt,
Options: map[string]any{"num_predict": 50, "temperature": 0.1},
},
func(api.GenerateResponse) error { return nil },
)
if err != nil {
b.Logf("Error during model warm-up: %v", err)
}
}
}
// unload forces model unloading using KeepAlive: 0 parameter
func unload(client *api.Client, model string, b *testing.B) {
req := &api.GenerateRequest{
Model: model,
KeepAlive: &api.Duration{Duration: 0},
}
if err := client.Generate(context.Background(), req, func(api.GenerateResponse) error { return nil }); err != nil {
b.Logf("Unload error: %v", err)
}
time.Sleep(1 * time.Second)
}
docs/benchmark.md deleted 100644 → 0
View file @ 6baf1e31
# Benchmark
Go benchmark tests that measure end-to-end performance of a running Ollama server. Run these tests to evaluate model inference performance on your hardware and measure the impact of code changes.
## When to use
Run these benchmarks when:
- Making changes to the model inference engine
- Modifying model loading/unloading logic
- Changing prompt processing or token generation code
- Implementing a new model architecture
- Testing performance across different hardware setups
## Prerequisites
- Ollama server running locally with `ollama serve` on `127.0.0.1:11434`
## Usage and Examples
>[!NOTE]
>All commands must be run from the root directory of the Ollama project.
Basic syntax:
```bash
go test -bench=. ./benchmark/... -m $MODEL_NAME
```
Required flags:
- `-bench=.`: Run all benchmarks
- `-m`: Model name to benchmark
Optional flags:
- `-count N`: Number of times to run the benchmark (useful for statistical analysis)
- `-timeout T`: Maximum time for the benchmark to run (e.g. "10m" for 10 minutes)
Common usage patterns:
Single benchmark run with a model specified:
```bash
go test -bench=. ./benchmark/... -m llama3.3
```
## Output metrics
The benchmark reports several key metrics:
- `gen_tok/s`: Generated tokens per second
- `prompt_tok/s`: Prompt processing tokens per second
- `ttft_ms`: Time to first token in milliseconds
- `load_ms`: Model load time in milliseconds
- `gen_tokens`: Total tokens generated
- `prompt_tokens`: Total prompt tokens processed
Each benchmark runs two scenarios:
- Cold start: Model is loaded from disk for each test
- Warm start: Model is pre-loaded in memory
Three prompt lengths are tested for each scenario:
- Short prompt (100 tokens)
- Medium prompt (500 tokens)
- Long prompt (1000 tokens)
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