Safepoint Bean?

[Ben Evans]

Hi Tony,

We would also be very interested in this and would be happy to contribute
time to this effort / pair with you if it would help.

Thanks,

Ben

On Mon, Oct 14, 2019 at 11:24 AM Tony Printezis <tprintezis at twitter.com>
wrote:

> Hi Mandy,
>
> Thanks for the response! I hope you’re well!
>
> We’d like to be able to get safepoint stats from within the JVM so we can
> post them to our observability system. Would creating a Bean (a la
> GarbageCollectorMXBean) that exposes this info make sense? I’d be happy
> to work on it if there’s interest. Would you recommend an alternative
> method?
>
> Tony
>
>
> —————
> Tony Printezis | @TonyPrintezis | tprintezis at twitter.com
>
>
> On October 14, 2019 at 12:49:57 PM, Mandy Chung (mandy.chung at oracle.com)
> wrote:
>
> jdk.internal.jvmstat is JDK internal unsupported API.  jstat and jcmd
> monitors the JVM statistics that you can use but I think they don't show
> the safepoint counters by default.
>
> Mandy
>
> On 10/14/19 8:25 AM, Tony Printezis wrote:
>
> Is jvmstat a public / supported API? The jdk.internal.jvmstat module
> doesn’t seem to be exporting anything publicly (and it also has “internal”
> in its name).
>
> Tony
>
>
> —————
> Tony Printezis | @TonyPrintezis | tprintezis at twitter.com
>
>
> On October 11, 2019 at 11:10:18 PM, Yasumasa Suenaga (
> suenaga at oss.nttdata.com) wrote:
>
> 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>
> >
>
>
>
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