Thank you Miroslav, Very useful explanation
William LEDDA -----Original Message----- From: Miroslav Lichvar [mailto:[email protected]] Sent: 18 February 2015 18:17 To: Ledda William EXT Cc: [email protected] Subject: Re: [Linuxptp-users] Linear regression or pi? On Tue, Feb 17, 2015 at 12:43:50PM +0000, Ledda William EXT wrote: > Dear linuxptp-users, > I installed today linuxptp 1.5 to make some tests. I found that it is > possible to use two different servos with phc2sys. I was using a version > based on 1.3 and I found that the pi works fine for me. So which is the best? > Or better... when one is preferable to the other? Which are the pros and cons? The main advantage of linreg over pi is that it doesn't require any configuration for good performance, it works well in a wide range of conditions. The disadvantage is that it's much more heavy on math. Unless it's running on an extremely slow cpu with software floating point, I'd not expect this to be a problem. My recommendation is: if you care about accuracy and you can find good PI constants for your conditions, use pi. Otherwise use linreg. -- Miroslav Lichvar ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Linuxptp-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-users
