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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package parsers holds parsers to parse Benchmark test output.
//
// Parsers parse Benchmark test output and place it in BigQuery
// structs for sending to BigQuery databases.
package parsers
import (
"fmt"
"strconv"
"strings"
"gvisor.dev/gvisor/test/benchmarks/tools"
"gvisor.dev/gvisor/tools/bigquery"
)
// ParseOutput expects golang benchmark output and returns a struct formatted
// for BigQuery.
func ParseOutput(output string, name string, official bool) (*bigquery.Suite, error) {
suite := bigquery.NewSuite(name, official)
lines := strings.Split(output, "\n")
for _, line := range lines {
bm, err := parseLine(line)
if err != nil {
return nil, fmt.Errorf("failed to parse line '%s': %v", line, err)
}
if bm != nil {
suite.Benchmarks = append(suite.Benchmarks, bm)
}
}
return suite, nil
}
// parseLine handles parsing a benchmark line into a bigquery.Benchmark.
//
// Example: "BenchmarkRuby/server_threads.1-6 1 1397875880 ns/op 140 requests_per_second.QPS"
//
// This function will return the following benchmark:
// *bigquery.Benchmark{
// Name: BenchmarkRuby
// []*bigquery.Condition{
// {Name: GOMAXPROCS, 6}
// {Name: server_threads, 1}
// }
// []*bigquery.Metric{
// {Name: ns/op, Unit: ns/op, Sample: 1397875880}
// {Name: requests_per_second, Unit: QPS, Sample: 140 }
// }
//}
func parseLine(line string) (*bigquery.Benchmark, error) {
fields := strings.Fields(line)
// Check if this line is a Benchmark line. Otherwise ignore the line.
if len(fields) < 2 || !strings.HasPrefix(fields[0], "Benchmark") {
return nil, nil
}
iters, err := strconv.Atoi(fields[1])
if err != nil {
return nil, fmt.Errorf("expecting number of runs, got %s: %v", fields[1], err)
}
name, params, err := parseNameParams(fields[0])
if err != nil {
return nil, fmt.Errorf("parse name/params: %v", err)
}
bm := bigquery.NewBenchmark(name, iters)
for _, p := range params {
bm.AddCondition(p.Name, p.Value)
}
for i := 1; i < len(fields)/2; i++ {
value := fields[2*i]
metric := fields[2*i+1]
if err := makeMetric(bm, value, metric); err != nil {
return nil, fmt.Errorf("makeMetric on metric %q value: %s: %v", metric, value, err)
}
}
return bm, nil
}
// parseNameParams parses the Name, GOMAXPROCS, and Params from the test.
// Field here should be of the format TESTNAME/PARAMS-GOMAXPROCS.
// Parameters will be separated by a "/" with individual params being
// "name.value".
func parseNameParams(field string) (string, []*tools.Parameter, error) {
var params []*tools.Parameter
// Remove GOMAXPROCS from end.
maxIndex := strings.LastIndex(field, "-")
if maxIndex < 0 {
return "", nil, fmt.Errorf("GOMAXPROCS not found: %s", field)
}
maxProcs := field[maxIndex+1:]
params = append(params, &tools.Parameter{
Name: "GOMAXPROCS",
Value: maxProcs,
})
remainder := field[0:maxIndex]
index := strings.Index(remainder, "/")
if index == -1 {
return remainder, params, nil
}
name := remainder[0:index]
p := remainder[index+1:]
ps, err := tools.NameToParameters(p)
if err != nil {
return "", nil, fmt.Errorf("NameToParameters %s: %v", field, err)
}
params = append(params, ps...)
return name, params, nil
}
// makeMetric parses metrics and adds them to the passed Benchmark.
func makeMetric(bm *bigquery.Benchmark, value, metric string) error {
switch metric {
// Ignore most output from golang benchmarks.
case "MB/s", "B/op", "allocs/op":
return nil
case "ns/op":
val, err := strconv.ParseFloat(value, 64)
if err != nil {
return fmt.Errorf("ParseFloat %s: %v", value, err)
}
bm.AddMetric(metric /*metric name*/, metric /*unit*/, val /*sample*/)
default:
m, err := tools.ParseCustomMetric(value, metric)
if err != nil {
return fmt.Errorf("ParseCustomMetric %s: %v ", metric, err)
}
bm.AddMetric(m.Name, m.Unit, m.Sample)
}
return nil
}
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