8359110: Log accumulated GC and process CPU time upon VM exit

[JonasNorlinder]

Add support to log CPU cost for GC during VM exit with -Xlog:gc.

[1.500s][info ][gc] GC CPU cost: 1.75%

Additionally, detailed information may be retrieved with -Xlog:gc=trace

[1.500s][trace][gc] Process CPU time: 4.945370s
[1.500s][trace][gc] GC CPU time: 0.086382s
[1.500s][info ][gc] GC CPU cost: 1.75%

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Progress

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Issue

• JDK-8359110: Log accumulated GC and process CPU time upon VM exit (Enhancement - P4)

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Webrevs

• 00: Full (4741b025)

[JonasNorlinder]

/label add hotspot-gc

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@JonasNorlinder
The hotspot-gc label was successfully added.

[JonasNorlinder]

/label add runtime

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These labels are valid:

• graal
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[JonasNorlinder]

/label add hotspot-runtime

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