On Sat, 26 Jul 2025 07:46:25 GMT, ExE Boss <d...@openjdk.org> wrote:

>> This PR aims to Panamize the Java Kqueue implementation, This is based on 
>> the work that was previously shared in 
>> https://github.com/openjdk/jdk/pull/22307 , The main change since then is 
>> that this branch takes advantage of the changes made in 
>> https://github.com/openjdk/jdk/pull/25043 to allow for better performance 
>> during errno handling.
>> 
>> These changes feature a lot of Jextract generated files, though alterations 
>> have been made in relation to Errno handling and performance improvements.
>> 
>> I will update this description soon to include performance metrics on a few 
>> microbenchmarks, though currently it's roughly 2% to 3% slower with the 
>> changes, which is somewhat expected, though there are still a few ideas of 
>> possible performance improvements that could be tried. Any suggestions or 
>> comments in that area are more than welcome however.
>
> src/java.base/macosx/classes/sun/nio/ch/KQueuePoller.java line 44:
> 
>> 42: 
>> 43:     KQueuePoller(boolean subPoller, boolean read) throws IOException {
>> 44:         this.kqfd = kqueue_h.kqueue();
> 
> Note that the old implementation of `KQueue.create()` had a check for 
> negative `kqfd`: 
> <https://github.com/openjdk/jdk/blob/d288ca28be7bfba3abe9f54cefbe53e73c25707e/src/java.base/macosx/native/libnio/ch/KQueue.c#L63-L71>

Sorry for the delay in getting back to this, thanks for the comment though! 
I'll update the PR to include that again

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

PR Review Comment: https://git.openjdk.org/jdk/pull/25546#discussion_r2269512920

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