RFR: 8229517: Support for optional asynchronous/buffered logging [v20]

Mon May 24 09:05:20 UTC 2021

On Mon, 24 May 2021 04:12:54 GMT, Xin Liu <xliu at openjdk.org> wrote:

>> This patch provides a buffer to store asynchrounous messages and flush them to
>> underlying files periodically.
>
> Xin Liu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   flush() waits until all pending logging IO operations are done.
>   
>   This patch support all gtests in async mode.
>   make test TEST="gtest:all" TEST_OPTS='VM_OPTIONS=-Xlog:async'

src/hotspot/share/logging/logAsyncWriter.hpp line 147:

> 145:     Initialized,
> 146:     Running,
> 147:     Terminated,

These two states can be removed now, right? If so, maybe having a binary state (`volatile bool _initialized`) is enough and easier to follow.

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PR: https://git.openjdk.java.net/jdk/pull/3135