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>I love FreeBSD and was planning on switching some servers from Linux but found that it consumed about 25% more power than my Linux boxes Wow, I wouldn't have
by networked 13y ago
>I love FreeBSD and was planning on switching some servers from Linux but found that it consumed about 25% more power than my Linux boxes
Wow, I wouldn't have thought there would be such a dramatic difference in power consumption on anything but portable hardware. Did you try to measure the CPU and I/O usage on your servers and compare them between Linux and FreeBSD? I wonder if FreeBSD's greater power draw was due to its ACPI implementation or if the average system load was also higher (ZFS?).
- danford 13y agoI wasn't using zfs at the time and I didn't do much comparison with CPU and IO, I used a wattage meter. I followed the FreeBSD guide (http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-overview.html http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/ac...) and tried just about everything. My Linux box was running at about 9watts (idle) and freeBSD started out at around 18, but I got it down to about 12watts after making a lot of optimizations. I think most of the difference is because FreeBSD is using older more stable software, and the Ubuntu server was running some of the latest software.
- takeda 13y agoDo you remember which FreeBSD version and which Linux kernel version was it? Linux had tickless kernel + CPU scaling for a while. FreeBSD is lagging in this aspect.
- profquail 13y agoThe FreeBSD kernel is tickless as of FreeBSD 10: http://www.freebsdnews.net/2013/09/20/freebsd-10s-new-technologies-and-features/ http://www.freebsdnews.net/2013/09/20/freebsd-10s-new-techno...