Re: [Linuxptp-devel] how PI controller work in linuxptp

2015-02-09 Thread Arnold kang
thank you! 2015-02-09 17:17 GMT+08:00 Miroslav Lichvar : > On Mon, Feb 09, 2015 at 05:04:05PM +0800, Arnold kang wrote: > > thank you, but i still don't know how it work. i want to understand it > > totally, please help me > > How a PI controller works? I'm not sure that can be explained in a few

Re: [Linuxptp-devel] how PI controller work in linuxptp

2015-02-09 Thread Miroslav Lichvar
On Mon, Feb 09, 2015 at 05:04:05PM +0800, Arnold kang wrote: > thank you, but i still don't know how it work. i want to understand it > totally, please help me How a PI controller works? I'm not sure that can be explained in a few paragraphs in an email. I'd suggest to start with the wikipedia ent

Re: [Linuxptp-devel] how PI controller work in linuxptp

2015-02-09 Thread Arnold kang
thank you, but i still don't know how it work. i want to understand it totally, please help me 2015-02-09 16:26 GMT+08:00 Miroslav Lichvar : > On Mon, Feb 09, 2015 at 03:51:32PM +0800, Arnold kang wrote: > > hi all, > > i'm reading the linuxptp code, and read pi.c many times, but i'm not > sure

Re: [Linuxptp-devel] how PI controller work in linuxptp

2015-02-09 Thread Miroslav Lichvar
On Mon, Feb 09, 2015 at 03:51:32PM +0800, Arnold kang wrote: > hi all, > i'm reading the linuxptp code, and read pi.c many times, but i'm not sure > PI work in code . please help me , thanks! > > ps, freq_est_interval = 0.016 / s->ki, why 0.016? It's an experimentally determined value. With smal

[Linuxptp-devel] how PI controller work in linuxptp

2015-02-08 Thread Arnold kang
hi all, i'm reading the linuxptp code, and read pi.c many times, but i'm not sure PI work in code . please help me , thanks! ps, freq_est_interval = 0.016 / s->ki, why 0.016? -- Dive into the World of Parallel Programming