Date: Fri, 10 Nov 2017 08:35:14 +0000 From: bugzilla-noreply@freebsd.org To: java@FreeBSD.org Subject: [Bug 223589] [PATCH] java/openjdk8: support setting thread name in OpenJDK8 Message-ID: <bug-223589-8522@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D223589 Bug ID: 223589 Summary: [PATCH] java/openjdk8: support setting thread name in OpenJDK8 Product: Ports & Packages Version: Latest Hardware: Any OS: Any Status: New Keywords: patch Severity: Affects Many People Priority: --- Component: Individual Port(s) Assignee: java@FreeBSD.org Reporter: bra@fsn.hu Assignee: java@FreeBSD.org Flags: maintainer-feedback?(java@FreeBSD.org) Keywords: patch Created attachment 187902 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D187902&action= =3Dedit openjdk8 thread name patch The following patch makes OpenJDK8 able to set threads' native name, which = is quite useful for debugging which thread uses resources. Before the patch you can see this in top: 43720 tomcat 20 0 11563M 9233M kqread 7 1:12 0.45% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 8 1:17 0.45% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 5 1:09 0.44% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 15 1:19 0.44% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 16 0:58 0.44% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 6 1:15 0.44% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 3 1:16 0.43% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 12 1:15 0.43% java{ja= va} 43720 tomcat 20 0 11563M 9233M kqread 18 1:24 0.40% java{ja= va} after the patch: 46396 tomcat 21 0 7228M 1004M uwait 3 0:46 7.80% java{C2 CompilerThread1} 46396 tomcat 20 0 7228M 1004M uwait 2 0:49 2.73% java{C2 CompilerThread0} 46396 tomcat 20 0 7228M 1004M uwait 0 0:42 1.83% java{qtp927744186-64} 46396 tomcat 20 0 7228M 1004M select 1 0:03 0.01% java{A= MQP Connection 0:0} 46349 tomcat 20 0 7005M 816M kqread 1 0:02 0.00% java{pool-7-thread-1} 46396 tomcat 20 0 7228M 1004M kqread 0 0:09 0.10% java{lettuce-nioEventLoo} According to thr_set_name(2), the thread's name can be maximum 19 characters (MAXCOMLEN + 1 bytes), we'll give a buffer of that size just to be sure. The MacOS code prefixes everthing with "Java", but it's totally useless (as= can be seen above, just eats valuable space), so use only the name which is giv= en by the caller. --=20 You are receiving this mail because: You are the assignee for the bug.=
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