RFR: 8229517: Support for optional asynchronous/buffered logging [v9]

[Xin Liu]

On Fri, 9 Apr 2021 08:34:04 GMT, Xin Liu <xliu at openjdk.org> wrote:

>> src/hotspot/share/logging/logFileOutput.cpp line 50:
>> 
>>> 48:     : LogFileStreamOutput(NULL), _name(os::strdup_check_oom(name, mtLogging)),
>>> 49:       _file_name(NULL), _archive_name(NULL), _current_file(0),
>>> 50:       _file_count(DefaultFileCount), _is_default_file_count(true), _async_mode(AsyncLogging), _archive_name_len(0),
>> 
>> See comments on `globals.hpp`. No need for an extra option. Make this `false` by default.
>> 
>> And can you please also add the `_async_mode` to the following log trace in `LogFileOutput::initialize()`:
>> 
>>   log_trace(logging)("Initializing logging to file '%s' (filecount: %u"
>>                      ", filesize: " SIZE_FORMAT " KiB).",
>> _file_name, _file_count, _rotate_size / K);
>
> ack. I will add some log_traces for asynclogflusher and this.

done.

-------------

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