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runtime/pprof: document labels bug

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Currently only CPU profile utilizes tag information.
This change documents that fact

Updates #23458

Change-Id: Ic893e85f63af0da9100d8cba7d3328c294e8c810
GitHub-Last-Rev: be99a12629
GitHub-Pull-Request: golang/go#27198
Reviewed-on: https://go-review.googlesource.com/c/go/+/131275
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This commit is contained in:
Komu Wairagu 2019-03-07 17:53:18 +00:00 committed by Andrew Bonventre
parent 91170d7201
commit 9a71015860
1 changed files with 2 additions and 0 deletions
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src/runtime/pprof/label.go
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@ -54,6 +54,8 @@ func WithLabels(ctx context.Context, labels LabelSet) context.Context {
// Labels takes an even number of strings representing key-value pairs
// and makes a LabelSet containing them.
// A label overwrites a prior label with the same key.
// Currently only CPU profile utilizes labels information.
// See https://golang.org/issue/23458 for details.
func Labels(args ...string) LabelSet {
if len(args)%2 != 0 {
panic("uneven number of arguments to pprof.Labels")