RFR: 8346264: "Total compile time" counter should include time spent in failing/bailout compiles [v2]

[Aleksey Shipilev]

On Mon, 16 Dec 2024 18:54:30 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Would be nice to add separate time for failed/bailout compilations to get sense how much time we spend in them.

`CompileBroker` already gathers it, and it is printed in `-XX:+CITime`:


$ java -XX:+CITime -Xcomp
...
Accumulated compiler times
----------------------------------------------------------
  Total compilation time   :   1.443 s
    Standard compilation   :   1.443 s, Average : 0.000 s
    Bailed out compilation :   0.000 s, Average : 0.000 s
    On stack replacement   :   0.000 s, Average : 0.000 s
    Invalidated            :   0.000 s, Average : 0.000 s


I don't think exposing bailed/failed time in `CompilerMXBean` would work well, as it is a public API. We can extend the JFR `CompilerStatistics` event, perhaps separately?

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PR Comment: https://git.openjdk.org/jdk/pull/22760#issuecomment-2546603208