Safepoint Bean?

[Yasumasa Suenaga]

Hi,

AFAIK the API for them does not provided, but we can use reader class for hsperfdata
in jdk.internal.jvmstat module.
Examples are available on my GitHub:

  https://github.com/YaSuenag/perfreader

You can get safepoint statistics via sun.rt.safepoint* in hsperfdata.


Yasumasa


On 2019/10/12 10:30, Hohensee, Paul wrote:
> I don’t know of any. Also, it appears that there are no uses of any of the HotspotRuntimeMBean methods in the JDK, so it could actually be removed! If you want to add its methods to a public interface, I’d create com.sun.management.RuntimeMXBean by analogy to c.s.m.ThreadMXBean and use the supported/enabled approach of *ThreadAllocatedBytes*. Needs a CSR, of course.
> 
> Paul
> 
> *From: *serviceability-dev <serviceability-dev-bounces at openjdk.java.net> on behalf of Tony Printezis <tprintezis at twitter.com>
> *Date: *Friday, October 11, 2019 at 1:45 PM
> *To: *"serviceability-dev at openjdk.java.net" <serviceability-dev at openjdk.java.net>
> *Subject: *Safepoint Bean?
> 
> Hi there,
> 
> Is there a standard MBean (similar to GarbageCollectorMXBean), or other mechanism, that can be used to get safepoint statistics from Java (count, time, etc.)? I know it’s possible to get that info from sun.management.HotspotRuntime.java, but I assume this is not a publicly accessible API any more? Is there a standard alternative?
> 
> Thanks,
> 
> Tony
> 
> —————
> 
> Tony Printezis | @TonyPrintezis | tprintezis at twitter.com <mailto:tprintezis at twitter.com>
>