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Bug 255757 - Use NIO2 Notifier by default
Summary: Use NIO2 Notifier by default
Status: NEW
Alias: None
Product: platform
Classification: Unclassified
Component: Filesystems (show other bugs)
Version: 8.2
Hardware: All All
: P3 normal (vote)
Assignee: Jaroslav Havlin
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-10-07 08:55 UTC by Jaroslav Havlin
Modified: 2015-10-23 15:32 UTC (History)
0 users

See Also:
Issue Type: TASK
Exception Reporter:

Attachments
Working draft of patch (4.00 KB, patch)
2015-10-23 15:31 UTC, Jaroslav Havlin 		Details | Diff
First measurement results (930 bytes, text/plain)
2015-10-23 15:32 UTC, Jaroslav Havlin 		Details
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Description Jaroslav Havlin 2015-10-07 08:55:51 UTC 
Currently, native file system notifiers are used by default on major platforms.
We might use NIO2 notifier by default and possibly, if it works correctly,
remove native notifiers completely in some future release.
(Some system property for enforcing native notifier should be provided.)
Comment 1 Jaroslav Havlin 2015-10-08 13:00:10 UTC 
Notes:

 - NIO2 WatchService was originally used in Solaris notifier by Egor Ushakov
   (masterfs.solaris), which was then generalized and renamed to masterfs.nio2.

 - NIO2 WatchService implementation for Mac OS X uses inefficient polling.
   See https://bugs.openjdk.java.net/browse/JDK-7133447.

 - Performance on Windows and Linux should be checked and measured and compared
   to native implementations.
Comment 2 Jaroslav Havlin 2015-10-23 15:31:21 UTC 
Created attachment 156938 [details]
Working draft of patch
Comment 3 Jaroslav Havlin 2015-10-23 15:32:25 UTC 
Created attachment 156939 [details]
First measurement results