git: openjdk/loom: fibers: More poller updates/tuning

[duke]

Changeset: 7fbc8112
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2023-10-11 17:44:04 +0000
URL:       https://git.openjdk.org/loom/commit/7fbc811261271fd6f7094c077e4c1a34d9a24275

More poller updates/tuning

! src/java.base/linux/classes/sun/nio/ch/DefaultPollerProvider.java
! src/java.base/linux/classes/sun/nio/ch/EPollPoller.java
! src/java.base/macosx/classes/sun/nio/ch/DefaultPollerProvider.java
! src/java.base/macosx/classes/sun/nio/ch/KQueuePoller.java
! src/java.base/share/classes/sun/nio/ch/Poller.java
! src/java.base/share/classes/sun/nio/ch/PollerProvider.java
! src/java.base/windows/classes/sun/nio/ch/DefaultPollerProvider.java
! test/jdk/java/net/vthread/BlockingSocketOps.java
! test/jdk/java/nio/channels/vthread/BlockingChannelOps.java