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Added tracing span to evaluator.eval() 

Signed-off-by: Marco Pracucci <marco@pracucci.com>
pull/8603/head
Marco Pracucci 2021-03-15 15:05:47 +01:00
parent 76750d2a96
commit 7bbab380b6
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GPG Key ID: 74C1BD403D2DF9B5
1 changed files with 5 additions and 0 deletions
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5
promql/engine.go
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@ -19,6 +19,7 @@ import (
"context" "context"
"fmt" "fmt"
"math" "math"
"reflect"
"regexp" "regexp"
"runtime" "runtime"
"sort" "sort"
@ -1125,6 +1126,10 @@ func (ev *evaluator) eval(expr parser.Expr) (parser.Value, storage.Warnings) {
} }
numSteps := int((ev.endTimestamp-ev.startTimestamp)/ev.interval) + 1 numSteps := int((ev.endTimestamp-ev.startTimestamp)/ev.interval) + 1
// Create a new span to help investigate inner evaluation performances.
span, _ := opentracing.StartSpanFromContext(ev.ctx, stats.InnerEvalTime.SpanOperation()+" eval "+reflect.TypeOf(expr).String())
defer span.Finish()
switch e := expr.(type) { switch e := expr.(type) {
case *parser.AggregateExpr: case *parser.AggregateExpr:
unwrapParenExpr(&e.Param) unwrapParenExpr(&e.Param)