From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ran Shalit Subject: understanding cpuidle Date: Thu, 16 Oct 2014 10:42:09 +0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Sender: linux-omap-owner@vger.kernel.org To: kernelnewbies , linux-pm@vger.kernel.org, linux-omap@vger.kernel.org List-Id: linux-pm@vger.kernel.org Hello, I try to understand the cpuidle main concept but have some difficulties. I could not find any documentation to explain the cpuidle. what does it mean that it enters idle when "no thread to run" ?if I have only one process which does only while(1) { printf("C"); mdelay(1000); } Can I expect it to enter idle for 1 second and then print "C" and get again to idle ? Thanks Ran