[SOLVED] CPU is not evenly distributed when application runs

sandeep002gupta · 08-10-2016, 06:09 AM

Hi,
we are running JAVA/Tomcat application one of server & its consumed 100% cpu utilization. while on server have 4 CPU but its consumed only one CPU at a time & other 3 CPU utilization is showing like 0%.

Please suggest why process is not divided in to all cpus.

here I have attached screenshot for reference.

TenTenths · 08-10-2016, 07:28 AM

If your application is running as a single thread then it'll only use a single CPU.

An application has to be multi-processor/thread aware and written to take advantage of this otherwise it can max out a single CPU.

sandeep002gupta · 08-10-2016, 07:33 AM

Thanks, have any process to check application run by single threads.

ReinaldoGomes · 08-19-2016, 02:12 PM

Should this be feasible for your scenario, you could also run multiple instances of the same application, so that each would be handled by one process and use multiple cpus.

sundialsvcs · 08-22-2016, 12:47 AM

Remember that your Java application is actually being run ... as far as the operating-system is concerned ... by a Java Virtual Machine (JVM) process. There is only one such process-instance responsible for all of the activities of this application-instance, and this process will therefore run on only one CPU/Core at a time. You observe that only one is being used, and you coincidentally observe that the same core-ID is being repeatedly picked.

sandeep002gupta · 08-23-2016, 04:49 AM

Thanks guys...