But, is it correct Thread to be sleep? On 10 May 2017 at 10:43, Oliver Fernandez <oliver.fernan...@marfeel.com> wrote:
> So basically we can consider this time as CPU being idle, right? > > > On 10 May 2017 at 10:15, Mark Thomas <ma...@apache.org> wrote: > >> 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$AsyncTimeout.run() >> > - AbstractProtocol.java:1138 [Wall Time] >> > java.lang.Thread.sleep(long) ----> 38% CPU >> > >> > - org.apache.catalina.core.ContainerBase$ContainerBackgroundPr >> ocessor.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/T >> hread.html#onSpinWait-- >> > <http://download.java.net/java/jdk9/docs/api/java/lang/Thre >> ad.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 >> >> > > > -- > > *Óliver Fernández* > > Principal Architect > > [image: Inline image 2] > > > Marfeel Solutions S.L. > > Rambla Catalunya 35, Principal 2ª > > 08007 Barcelona, Spain > > > > > ES: (+34) 93 178 59 50 ext. 106 > > US: (+1) 917-341-2540 ext. 106 > > UK: (+44) 207-048-37-28 <%28%2B44%29%20704-837-28> ext. 106 > > > www.marfeel.com > -- *Óliver Fernández* Principal Architect [image: Inline image 2] Marfeel Solutions S.L. Rambla Catalunya 35, Principal 2ª 08007 Barcelona, Spain ES: (+34) 93 178 59 50 ext. 106 US: (+1) 917-341-2540 ext. 106 UK: (+44) 207-048-37-28 <%28%2B44%29%20704-837-28> ext. 106 www.marfeel.com