What's the point of repeating an email address in "The Envelope" and the "The Header"? What is the difficulty of an encounter when a monster can transform? The "us", "sy" and "id" values are useful as the user, system (kernel) and idle CPU time respectively. Are the guns on a fighter jet fixed or can they be aimed? http://3swindows.com/cpu-usage/java-process-taking-too-much-cpu-in-linux.html
This spread implies that no one thread has a particular problem. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 31253 user1 16 0 2112m 2.1g 1764 R 37.0 53.2 0:39.89 java 31249 user1 16 0 2112m To keep this blog simple, we will use the following command that will give us a nice list of processes, user, cpu%, and command line. Step B: What processes are using cpu? http://serverfault.com/questions/38195/getting-a-per-thread-cpu-stats
Please click the link in the confirmation email to activate your subscription. Assuming you're using pthreads or a library that uses it, such as Boost libraries. Custom ColorFunction for GeoGraphics plot with ReliefMap What is a non-vulgar synonym for this swear word meaning "an enormous amount"? If the top cpu comsumer has the name GC Slave in multiple reports, the issue is most certainly the heap size, or if the name is JIT compilation, this is a
To see the per cpu usage in header section, press 1. I see this is only in kernels 2.6.26 and up. There are many useful tools but please do make sure that the output is understood. Htop Thread Name Support Xmodulo Did you find this tutorial helpful?
What is the best way to attach backing on a quilt with irregular pattern? Linux Top Threads I will cover the process used with commonly available tools to make it more universally applicable. Detect ASCII-art windows made of M and S characters How should I respond to absurd observations from customers during software product demos? http://ask.xmodulo.com/view-threads-process-linux.html This site is not affiliated with Linus Torvalds or The Open Group in any way.
stime %lu The number of jiffies that this process has been scheduled in kernel mode. Ps Show Cpu Usage Javacores are specific to IBM JREs which are required by some versions of WebSphere Application Server. Whenever you have threads of interest, note the PID values, convert them to a hexadecimal value and look up the threads in thread dump file to discover the name of application The defining characteristics of a process is that it has its own memory, it is started by the OS, and interacts with it.
Special header with logo in center of it Memorable ordinals Electrical Propulsion Thrust Spatial screwdriver How to bevel only one end of a cylinder? Does every data type just boil down to nodes with pointers? Linux Show Threads Per Process What is the "crystal ball" in the meteorological station? Htop Show Threads wa - Percentage of CPU time spent in wait (on disk).
A typical invocation is vmstat 1 1000 or so but vmstat 1 3 is used for brevity So to get a Timestamp and the performance information: date > .tmp/testit vmstat 1 his comment is here Operating system = Redhat linux programming language = C++ using POSIX requirements = need to take samples every few seconds indefinetly, not just for one snapshot in time. I think that means I'm out of luck for now. –Pete Smoot Sep 24 '09 at 20:29 | show 1 more comment up vote 3 down vote The standard interface to Updated Likes 0 Comments 0 Debugging Maximo Any... Linux Per Thread Memory Usage
asked 3 years ago viewed 1375 times active 2 years ago Get the weekly newsletter! That definitely seems a better answer than mine, so +1. –kdgregory Sep 23 '09 at 21:45 OK, that sounds right, except my getrusage man page doesn't claim any knowledge Although the application is allowed to use most of the available CPU, approximately 25% of the total CPU is idle meaning that some points of contention or delay in the Java this contact form Outline of the Investigation: The trick of course is finding the right tools and knowing how to relate the information.
I know that top can split information per real thread (ones with pid), but it doesn't show the system/user/wait cpu usage split for each of them. Java Thread Cpu Usage Then please be generous and support Xmodulo! add a comment| 2 Answers 2 active oldest votes up vote 0 down vote thread1 and thread2 are child threads spawned by the main process but the main process can still
In Linux, threads (also called Lightweight Processes (LWP)) created within a program will have the same "thread group ID" as the program's PID. How are water vapors not visible? NI - The "nice" value for the process. Linux Thread This is likely due to the sampling period.
cpu monitoring share|improve this question edited Mar 18 '13 at 18:12 Anuj Gupta 24117 asked Dec 22 '11 at 1:12 kfmfe04 1,79441017 add a comment| 2 Answers 2 active oldest votes As I understand the information about processes and threads CPU usage is taken from /proc/
Graphlex 4x5 Lens Hood and Filters - How Do They Mount? Should we kill the features that users are not using frequently, to improve performance? Different tasks, same characters When jumping a car battery, why is it better to connect the red/positive cable first?