[jboss-jira] [JBoss JIRA] (AS7-5224) [JBoss 7.1.0.Final] High CPU usage for single-core CPU VMWare virtual machine running Redhat 6 OS

[Stuart Douglas (JIRA)]

    [ https://issues.jboss.org/browse/AS7-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12706963#comment-12706963 ] 

Stuart Douglas commented on AS7-5224:
-------------------------------------

It depends on what profiler you have, there is no built in one. 

Personally I like YJP (www.yourkit.com)
There is also JProfiler and a free eclipse one. 

This just seems really odd. That thread dump you gave us does not have any threads doing anything that would use CPU. Another option would be to take lots of thread dumps, and see if any of them have threads that are actually doing some work.
                
> [JBoss 7.1.0.Final] High CPU usage for single-core CPU VMWare virtual machine running Redhat 6 OS
> -------------------------------------------------------------------------------------------------
>
>                 Key: AS7-5224
>                 URL: https://issues.jboss.org/browse/AS7-5224
>             Project: Application Server 7
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 7.1.0.Final
>         Environment: -bash-4.1$ cat /proc/version
> Linux version 2.6.32-279.el6.x86_64 (mockbuild at x86-008.build.bos.redhat.com) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Wed Jun 13 18:24:36 EDT 2012
> -bash-4.1$ cat /proc/cpuinfo
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 44
> model name      : Intel(R) Xeon(R) CPU           X5650  @ 2.67GHz
> stepping        : 2
> cpu MHz         : 2666.761
> cache size      : 12288 KB
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 11
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc up arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm ida arat epb dts
> bogomips        : 5333.52
> clflush size    : 64
> cache_alignment : 64
> address sizes   : 40 bits physical, 48 bits virtual
> power management:
> -bash-4.1$ cat /proc/meminfo
> MemTotal:        3925212 kB
> MemFree:          328048 kB
> Buffers:           21276 kB
> Cached:          3268128 kB
> SwapCached:          180 kB
> Active:          1832808 kB
> Inactive:        1475292 kB
> Active(anon):       3104 kB
> Inactive(anon):    16008 kB
> Active(file):    1829704 kB
> Inactive(file):  1459284 kB
> Unevictable:           0 kB
> Mlocked:               0 kB
> SwapTotal:       8388600 kB
> SwapFree:        8387940 kB
> Dirty:                 0 kB
> Writeback:             0 kB
> AnonPages:         18624 kB
> Mapped:            12656 kB
> Shmem:               416 kB
> Slab:             220480 kB
> SReclaimable:     196296 kB
> SUnreclaim:        24184 kB
> KernelStack:         792 kB
> PageTables:         6980 kB
> NFS_Unstable:          0 kB
> Bounce:                0 kB
> WritebackTmp:          0 kB
> CommitLimit:    10351204 kB
> Committed_AS:     102640 kB
> VmallocTotal:   34359738367 kB
> VmallocUsed:      283176 kB
> VmallocChunk:   34359452028 kB
> HardwareCorrupted:     0 kB
> AnonHugePages:         0 kB
> HugePages_Total:       0
> HugePages_Free:        0
> HugePages_Rsvd:        0
> HugePages_Surp:        0
> Hugepagesize:       2048 kB
> DirectMap4k:       10240 kB
> DirectMap2M:     4184064 kB
>            Reporter: Claudiu Muresan
>            Assignee: Jason Greene
>         Attachments: boot.log, jstack.thread.dump, process.args, standalone.conf, standalone.xml, top
>
>
> When starting JBoss server in standalone configuration we have 100% CPU usage.
> There are no deployments.
> Please view attached items: thread dump, standalone.conf, standalone.xml.
> The JVM version is -bash-4.1$ ./java -version
> java version "1.6.0_27"
> Java(TM) SE Runtime Environment (build 1.6.0_27-b07)
> Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode)
> .
> Tried also with the latest JVM version (6u33) => high CPU usage.
> Tried also with 7.1.1 Final and same configuration(standalone.conf/standalone.xml) => high CPU usage.

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