JDK-8263426 : Reflow JfrNetworkUtilization::send_events
- Type: Enhancement
- Component: hotspot
- Sub-Component: jfr
- Affected Version: 11.0.1,15,16,17
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- Submitted: 2021-03-11
- Updated: 2021-03-18
- Resolved: 2021-03-12
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| JDK 17 |
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17 b14Fixed  |
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Description
SonarCloud instance reports a problem in JfrNetworkUtilization::send_events: "Identical sub-expressions on both sides of operator "-"." here: const JfrTickspan interval = last_sample_instant == 0 ? cur_time - cur_time : cur_time - last_sample_instant; Note "cur_time - cur_time". It would seem that `interval` is effectively zero when `last_sample_instant` is not yet initialized. And I see that the subsequent code checks for `interval.value() > 0` for every interface. That can be optimized a bit: when `last_sample_instant` is not available, do not enter the loop, and don't check `interval.value()`.
Comments
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