| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <45DF5A24.507@sbcglobal.net> Date: Fri, 23 Feb 2007 15:18:28 -0600 From: Matthew Frost <artusemrys@...global.net> To: Mockern@...dex.ru CC: linux-kernel@...r.kernel.org Subject: Re: battery time living in Linux Mockern wrote: > Hello, > > I need to know how much time my battery will be alive (an embedded system). > > How does Linux calculate it? How should I know that after 3 or 4 hours my battery will be completely discharged? > Your battery will discharge at a rate proportionate to its total charge and the wattage draw of the load (your embedded system, in this case) over time. If the drain is constant, as opposed to variable, this becomes easier to predict. However, your system load probably won't be constant. Also, the discharge rate of a battery depends on the environment and age/condition of the battery. I could just be missing something, but I am unaware of linux kernel functionality for determining battery life. There are benchmarks that can give you an estimate, but they are artificial. YMMV based on actual usage. Check out Len Brown et al. from the 2006 Ottawa Linux Symposium on Linux Laptop Battery Life, and adapt to suit. The only way to know for sure is to do the tests yourself and get an idea of your average battery life. Matt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists