https://www.simplicidade.org/tags/cpu/index.xml Recent content in Cpu on Notes Hugo -- gohugo.io en-us melo@simplicidade.org (Pedro Melo) melo@simplicidade.org (Pedro Melo) (c) 2016 Pedro Melo. https://www.simplicidade.org/notes/2005/05/28/cpu-usage-of-skype/ Sat, 28 May 2005 13:01:45 +0000 melo@simplicidade.org (Pedro Melo) https://www.simplicidade.org/notes/2005/05/28/cpu-usage-of-skype/ <p>My Skype is idle right now, sitting there on the second monitor.</p> <p>But top tells me that Skype is using 10% of my CPU. 10%!?!?!? WTF? It&rsquo;s just sitting there!</p> <p>Doing a <code>ktrace</code> on the process, gives:</p> <pre> 484 Skype CALL getrusage(0,0xf03b6c20) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0xffffffff,0xf03b6c20) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0,0xf03b6c00) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0xffffffff,0xf03b6c00) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0,0xf03b6ca0) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0xffffffff,0xf03b6ca0) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0,0xf03b6bb0) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0xffffffff,0xf03b6bb0) 484 Skype RET getrusage 0 484 Skype CALL select(0x1b,0xf03b6ad0,0xf03b6b50,0xf03b6bd0,0xf03b6c50) 484 Skype CALL getrusage(0,0xf01b2c00) 484 Skype RET getrusage 0 484 Skype CALL getrusage(0xffffffff,0xf01b2c00) 484 Skype RET getrusage 0 </pre> <p>Pages and pages of this&hellip;</p> <p>And looking at a <code>lsof</code> of the process, there is a single connection to a specific IP address, but running a <code>tcpdump</code> to catch all the traffic going to the address, shows that there is very little traffic.</p> <p>So what is Skype doing with the idle time?</p>