On 10/05/17 09:02, Oliver Fernandez wrote: > Sorry about the image. Here's in text format > > <All Threads> > > - org.apache.tomcat.utils.trheads.TaskThreadWrappingRunnable.run() ---> > 42% CPU. This is my webapp code. It's OK > > - org.apache.coyote.AbstractProtocol$AsyncTimeout.run() > - AbstractProtocol.java:1138 [Wall Time] > java.lang.Thread.sleep(long) ----> 38% CPU > > - org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run() > - ContainerBase.java:1355 [Wall Time] java.lang.Thread.sleep(long) > ------> 19%
You are looking at wall time, not CPU time so those values look fine. For an explanation of the differences see the YourKit docs: https://www.yourkit.com/docs/java/help/times.jsp Mark > > > I'm not sure what this means. is it just that the CPU is IDLE waiting > for other tasks to complete? > > > On 10 May 2017 at 09:53, Stevo Slavić <ssla...@gmail.com > <mailto:ssla...@gmail.com>> wrote: > > Maybe sleep call is in a loop - busy waiting, and sleeping too > short. Sleep > longer, observe latency after the change. In Java 9 there will be extra > option > > http://download.java.net/java/jdk9/docs/api/java/lang/Thread.html#onSpinWait-- > > <http://download.java.net/java/jdk9/docs/api/java/lang/Thread.html#onSpinWait--> > > On Wed, May 10, 2017 at 9:44 AM, Oliver Fernandez < > oliver.fernan...@marfeel.com <mailto:oliver.fernan...@marfeel.com>> > wrote: > > > While profiling my Tomcat app using YourKit, I noticed two Threads, > > consuming 57% of total CPU, in the method Thread.sleep() > > > > [image: Inline images 1] > > > > What's this Thread.sleep() about? > > > > > > > > > > > -- > > *Óliver Fernández* > > Principal Architect > > > Inline image 2 > > > > > Marfeel Solutions S.L. > > Rambla Catalunya 35, Principal 2ª > > 08007 Barcelona, Spain > > > > > > > ES: (+34) 93 178 59 50 <tel:%28%2B34%29%2093%20178%2059%2050> ext. 106 > > US: (+1) 917-341-2540 <tel:%28%2B1%29%20917-341-2540> ext. 106 > > UK: (+44) 207-048-37-28 <tel:%28%2B44%29%20704-837-28> ext. 106 > > > > > > www.marfeel.com <http://www.marfeel.com/> > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
