Kernel bypass with Java 7?

Question

I read in a couple of comments on SO Java 7 supports kernel bypass. However, when googling the topic I did not see any immediate examples of this.

Does anyone have an example of Java 7 performing kernel bypass? I'd be interested to see it

score 3 · Answer 1 · edited May 23 '17 at 12:32

The Answers to this related Question mention that SolarFlare has Java bindings: Networking with Kernel Bypass in Java.

As far as Java 7 is concerned, there is no support for this kind of thing in the core libraries. Kernel bypass is too system / vendor specific for inclusion in the standard APIs.

You can do other things to improve network throughput in Java that don't involve kernel bypass. For instance using the NIO Buffer and Channel APIs ... However, your typical Java "framework" tends to get in the way of this ... by only exposing Stream / Reader and other high level I/O abstractions to "application" code.

(I would also opine that if you have an application where network latency and throughput are critical enough for kernel bypass to be worthwhile, you should use a programming language that is "closer to the metal". Java is better for applications where the biggest problem is application complexity ... NOT moving lots of bits through the network fast.)

score 1 · Answer 2 · edited Mar 29 '23 at 08:02

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Take a look at the Onload Extensions API JNI Wrapper on github. The author seems to specialize in kernel bypass.

edited Mar 29 '23 at 08:02

Glorfindel

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answered Sep 12 '17 at 19:57

Andy Malakov

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score 0 · Answer 3 · answered Apr 04 '13 at 14:14

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Kernel bypassing is a method of avoiding the kernel when reading/writing to external data sources, e.g. files or networking.

Instead, you directly access the data storage without letting all the bytes running through the OS kernel. This is usually faster but also less secure, since the entire process is not supervised by the operating system anymore.

Assumption: In regard to Java, the kernel (could) represent(s) the JVM.

I have found a very good article on this.

answered Apr 04 '13 at 14:14

poitroae

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(Kernel bypass for accessing the file system seems like a really bad idea. It sounds like a good way to corrupt your file system ...) – Stephen C Apr 04 '13 at 14:31
@StephenC I wouldn't probably do `kernel bypassing` at all, but it might be useful for applications in need for being *incredibly* performant. – poitroae Apr 04 '13 at 14:34

Kernel bypass with Java 7?

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