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=223589 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=187902&action=edit 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{java} 43720 tomcat 20 0 11563M 9233M kqread 8 1:17 0.45% java{java} 43720 tomcat 20 0 11563M 9233M kqread 5 1:09 0.44% java{java} 43720 tomcat 20 0 11563M 9233M kqread 15 1:19 0.44% java{java} 43720 tomcat 20 0 11563M 9233M kqread 16 0:58 0.44% java{java} 43720 tomcat 20 0 11563M 9233M kqread 6 1:15 0.44% java{java} 43720 tomcat 20 0 11563M 9233M kqread 3 1:16 0.43% java{java} 43720 tomcat 20 0 11563M 9233M kqread 12 1:15 0.43% java{java} 43720 tomcat 20 0 11563M 9233M kqread 18 1:24 0.40% java{java} 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{AMQP 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 given by the caller. -- You are receiving this mail because: You are the assignee for the bug.home | help
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