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runtime,runtime/metrics: add heap goal and GC cycle metrics

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This change adds three new metrics: the heap goal, GC cycle count, and
forced GC count. These metrics are identical to their MemStats
counterparts.

For #37112.

Change-Id: I5a5e8dd550c0d646e5dcdbdf38274895e27cdd88
Reviewed-on: https://go-review.googlesource.com/c/go/+/247044
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
This commit is contained in:
Michael Anthony Knyszek 2020-08-06 16:47:58 +00:00 • committed by Michael Knyszek
parent 07c3f65d53
commit a8b28ebc87
4 changed files with 86 additions and 8 deletions
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23
src/runtime/metrics/description.go
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@ -50,6 +50,29 @@ type Description struct {
// The English language descriptions below must be kept in sync with the
// descriptions of each metric in doc.go.
var allDesc = []Description{
{
Name: "/gc/cycles/automatic:gc-cycles",
Description: "Count of completed GC cycles generated by the Go runtime.",
Kind: KindUint64,
Cumulative: true,
},
{
Name: "/gc/cycles/forced:gc-cycles",
Description: "Count of completed forced GC cycles.",
Kind: KindUint64,
Cumulative: true,
},
{
Name: "/gc/cycles/total:gc-cycles",
Description: "Count of all completed GC cycles.",
Kind: KindUint64,
Cumulative: true,
},
{
Name: "/gc/heap/goal:bytes",
Description: "Heap size target for the end of the GC cycle.",
Kind: KindUint64,
},
{
Name: "/gc/heap/objects:objects",
Description: "Number of objects, live or unswept, occupying heap memory.",