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Mark Histogram.(Positive|Negative)Spans as non-nullable.

Browse source 
As far as I understand it, we'd never expect to receive a nil span,
and remote.spansProtoToSpans would panic if we received a nil span.

Marking the fields as non-nullable also means the generated Golang
code doesn't use pointers for these fields, reducing allocations.

Signed-off-by: Charles Korn <charles.korn@grafana.com>
This commit is contained in:
Charles Korn 2023-02-03 13:46:33 +11:00
parent c70d85baed
commit 0a1de58f7e
No known key found for this signature in database
4 changed files with 87 additions and 87 deletions
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150
prompb/types.pb.go
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@ -383,14 +383,14 @@ type Histogram struct {
// *Histogram_ZeroCountFloat // *Histogram_ZeroCountFloat
ZeroCount isHistogram_ZeroCount `protobuf_oneof:"zero_count"` ZeroCount isHistogram_ZeroCount `protobuf_oneof:"zero_count"`
// Negative Buckets. // Negative Buckets.
NegativeSpans []*BucketSpan `protobuf:"bytes,8,rep,name=negative_spans,json=negativeSpans,proto3" json:"negative_spans,omitempty"` NegativeSpans []BucketSpan `protobuf:"bytes,8,rep,name=negative_spans,json=negativeSpans,proto3" json:"negative_spans"`
// Use either "negative_deltas" or "negative_counts", the former for // Use either "negative_deltas" or "negative_counts", the former for
// regular histograms with integer counts, the latter for float // regular histograms with integer counts, the latter for float
// histograms. // histograms.
NegativeDeltas []int64 `protobuf:"zigzag64,9,rep,packed,name=negative_deltas,json=negativeDeltas,proto3" json:"negative_deltas,omitempty"` NegativeDeltas []int64 `protobuf:"zigzag64,9,rep,packed,name=negative_deltas,json=negativeDeltas,proto3" json:"negative_deltas,omitempty"`
NegativeCounts []float64 `protobuf:"fixed64,10,rep,packed,name=negative_counts,json=negativeCounts,proto3" json:"negative_counts,omitempty"` NegativeCounts []float64 `protobuf:"fixed64,10,rep,packed,name=negative_counts,json=negativeCounts,proto3" json:"negative_counts,omitempty"`
// Positive Buckets. // Positive Buckets.
PositiveSpans []*BucketSpan `protobuf:"bytes,11,rep,name=positive_spans,json=positiveSpans,proto3" json:"positive_spans,omitempty"` PositiveSpans []BucketSpan `protobuf:"bytes,11,rep,name=positive_spans,json=positiveSpans,proto3" json:"positive_spans"`
// Use either "positive_deltas" or "positive_counts", the former for // Use either "positive_deltas" or "positive_counts", the former for
// regular histograms with integer counts, the latter for float // regular histograms with integer counts, the latter for float
// histograms. // histograms.
@ -529,7 +529,7 @@ func (m *Histogram) GetZeroCountFloat() float64 {
return 0 return 0
} }
func (m *Histogram) GetNegativeSpans() []*BucketSpan { func (m *Histogram) GetNegativeSpans() []BucketSpan {
if m != nil { if m != nil {
return m.NegativeSpans return m.NegativeSpans
} }
@ -550,7 +550,7 @@ func (m *Histogram) GetNegativeCounts() []float64 {
return nil return nil
} }
func (m *Histogram) GetPositiveSpans() []*BucketSpan { func (m *Histogram) GetPositiveSpans() []BucketSpan {
if m != nil { if m != nil {
return m.PositiveSpans return m.PositiveSpans
} }
@ -1143,75 +1143,75 @@ func init() {
func init() { proto.RegisterFile("types.proto", fileDescriptor_d938547f84707355) } func init() { proto.RegisterFile("types.proto", fileDescriptor_d938547f84707355) }
var fileDescriptor_d938547f84707355 = []byte{ var fileDescriptor_d938547f84707355 = []byte{
// 1075 bytes of a gzipped FileDescriptorProto // 1081 bytes of a gzipped FileDescriptorProto
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} }
func (m *MetricMetadata) Marshal() (dAtA []byte, err error) { func (m *MetricMetadata) Marshal() (dAtA []byte, err error) {
@ -2903,7 +2903,7 @@ func (m *Histogram) Unmarshal(dAtA []byte) error {
if postIndex > l { if postIndex > l {
return io.ErrUnexpectedEOF return io.ErrUnexpectedEOF
} }
m.NegativeSpans = append(m.NegativeSpans, &BucketSpan{}) m.NegativeSpans = append(m.NegativeSpans, BucketSpan{})
if err := m.NegativeSpans[len(m.NegativeSpans)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil { if err := m.NegativeSpans[len(m.NegativeSpans)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err return err
} }
@ -3069,7 +3069,7 @@ func (m *Histogram) Unmarshal(dAtA []byte) error {
if postIndex > l { if postIndex > l {
return io.ErrUnexpectedEOF return io.ErrUnexpectedEOF
} }
m.PositiveSpans = append(m.PositiveSpans, &BucketSpan{}) m.PositiveSpans = append(m.PositiveSpans, BucketSpan{})
if err := m.PositiveSpans[len(m.PositiveSpans)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil { if err := m.PositiveSpans[len(m.PositiveSpans)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err return err
} }

4
prompb/types.proto
View file

@ -88,7 +88,7 @@ message Histogram {
} }
// Negative Buckets. // Negative Buckets.
repeated BucketSpan negative_spans = 8; repeated BucketSpan negative_spans = 8 [(gogoproto.nullable) = false];
// Use either "negative_deltas" or "negative_counts", the former for // Use either "negative_deltas" or "negative_counts", the former for
// regular histograms with integer counts, the latter for float // regular histograms with integer counts, the latter for float
// histograms. // histograms.
@ -96,7 +96,7 @@ message Histogram {
repeated double negative_counts = 10; // Absolute count of each bucket. repeated double negative_counts = 10; // Absolute count of each bucket.
// Positive Buckets. // Positive Buckets.
repeated BucketSpan positive_spans = 11; repeated BucketSpan positive_spans = 11 [(gogoproto.nullable) = false];
// Use either "positive_deltas" or "positive_counts", the former for // Use either "positive_deltas" or "positive_counts", the former for
// regular histograms with integer counts, the latter for float // regular histograms with integer counts, the latter for float
// histograms. // histograms.

8
storage/remote/codec.go
View file

@ -559,7 +559,7 @@ func HistogramProtoToFloatHistogram(hp prompb.Histogram) *histogram.FloatHistogr
} }
} }
func spansProtoToSpans(s []*prompb.BucketSpan) []histogram.Span { func spansProtoToSpans(s []prompb.BucketSpan) []histogram.Span {
spans := make([]histogram.Span, len(s)) spans := make([]histogram.Span, len(s))
for i := 0; i < len(s); i++ { for i := 0; i < len(s); i++ {
spans[i] = histogram.Span{Offset: s[i].Offset, Length: s[i].Length} spans[i] = histogram.Span{Offset: s[i].Offset, Length: s[i].Length}
@ -600,10 +600,10 @@ func FloatHistogramToHistogramProto(timestamp int64, fh *histogram.FloatHistogra
} }
} }
func spansToSpansProto(s []histogram.Span) []*prompb.BucketSpan { func spansToSpansProto(s []histogram.Span) []prompb.BucketSpan {
spans := make([]*prompb.BucketSpan, len(s)) spans := make([]prompb.BucketSpan, len(s))
for i := 0; i < len(s); i++ { for i := 0; i < len(s); i++ {
spans[i] = &prompb.BucketSpan{Offset: s[i].Offset, Length: s[i].Length} spans[i] = prompb.BucketSpan{Offset: s[i].Offset, Length: s[i].Length}
} }
return spans return spans

8
storage/remote/codec_test.go
View file

@ -399,7 +399,7 @@ func exampleHistogramProto() prompb.Histogram {
Schema: 0, Schema: 0,
ZeroThreshold: 0, ZeroThreshold: 0,
ZeroCount: &prompb.Histogram_ZeroCountInt{ZeroCountInt: 0}, ZeroCount: &prompb.Histogram_ZeroCountInt{ZeroCountInt: 0},
NegativeSpans: []*prompb.BucketSpan{ NegativeSpans: []prompb.BucketSpan{
{ {
Offset: 0, Offset: 0,
Length: 5, Length: 5,
@ -414,7 +414,7 @@ func exampleHistogramProto() prompb.Histogram {
}, },
}, },
NegativeDeltas: []int64{1, 2, -2, 1, -1, 0}, NegativeDeltas: []int64{1, 2, -2, 1, -1, 0},
PositiveSpans: []*prompb.BucketSpan{ PositiveSpans: []prompb.BucketSpan{
{ {
Offset: 0, Offset: 0,
Length: 4, Length: 4,
@ -497,7 +497,7 @@ func exampleFloatHistogramProto() prompb.Histogram {
Schema: 0, Schema: 0,
ZeroThreshold: 0, ZeroThreshold: 0,
ZeroCount: &prompb.Histogram_ZeroCountFloat{ZeroCountFloat: 0}, ZeroCount: &prompb.Histogram_ZeroCountFloat{ZeroCountFloat: 0},
NegativeSpans: []*prompb.BucketSpan{ NegativeSpans: []prompb.BucketSpan{
{ {
Offset: 0, Offset: 0,
Length: 5, Length: 5,
@ -512,7 +512,7 @@ func exampleFloatHistogramProto() prompb.Histogram {
}, },
}, },
NegativeCounts: []float64{1, 2, -2, 1, -1, 0}, NegativeCounts: []float64{1, 2, -2, 1, -1, 0},
PositiveSpans: []*prompb.BucketSpan{ PositiveSpans: []prompb.BucketSpan{
{ {
Offset: 0, Offset: 0,
Length: 4, Length: 4,