Em qua., 10 de mai. de 2023 às 19:25, Richard Cochran <richardcoch...@gmail.com> escreveu: > <snipped> > But if you set --step_threshold=X, the program will use method #1 > whenever the estimated offset exceeds X.
Hello, Richard, thank you for the explanation. It confirms my initial understanding of the parameter. But I must be doing something wrong as I am not getting this clock step. I have run a test on two Fitlet SBCs, Ubuntu Mate 20.04 LTS, directly connected with each other. I changed the master's system clock with date midway in the test. Wasn't the slave supposed to update its system clock after a few steps? Versions: cve@cve-sbc-flt2:~$ uname -srvpi Linux 5.15.0-71-generic #78~20.04.1-Ubuntu SMP Wed Apr 19 11:26:48 UTC 2023 x86_64 x86_64 cve@cve-sbc-flt2:~$ ptp4l -v 3.1.1 Here is the log on the master side: cve@cve-sbc-flt1:~$ sudo ptp4l -4 -S -m -q -i enp3s0 [sudo] password for cve: ptp4l[5260.670]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE ptp4l[5260.671]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE ptp4l[5267.046]: port 1: LISTENING to MASTER on ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES ptp4l[5267.046]: selected local clock 0001c0.fffe.1a3e8e as best master ptp4l[5267.046]: port 1: assuming the grand master role Here is the log on the slave side: cve@cve-sbc-flt2:~$ sudo ptp4l -4 -S -s -m -q step_threshold=0.001 -i enp3s0 ptp4l[5616.149]: port 1: INITIALIZING to LISTENING on INIT_COMPLETE ptp4l[5616.149]: port 0: INITIALIZING to LISTENING on INIT_COMPLETE ptp4l[5617.961]: port 1: new foreign master 0001c0.fffe.1a3e8e-1 ptp4l[5621.961]: selected best master clock 0001c0.fffe.1a3e8e ptp4l[5621.961]: foreign master not using PTP timescale ptp4l[5621.961]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE ptp4l[5623.963]: master offset 13926354 s0 freq +100000000 path delay 194691 ptp4l[5624.963]: master offset 13857950 s0 freq +100000000 path delay 208774 ptp4l[5625.963]: master offset 13940749 s0 freq +100000000 path delay 173620 ptp4l[5626.963]: master offset 13935717 s0 freq +100000000 path delay 194691 ptp4l[5627.964]: master offset 13933208 s0 freq +100000000 path delay 194691 ptp4l[5628.964]: master offset 13930547 s0 freq +100000000 path delay 206909 ptp4l[5629.964]: master offset 13803831 s0 freq +100000000 path delay 219127 ptp4l[5630.964]: master offset 13857327 s0 freq +100000000 path delay 219127 ptp4l[5631.964]: master offset 13917423 s0 freq +100000000 path delay 206909 ptp4l[5632.964]: master offset 13918655 s0 freq +100000000 path delay 214912 ptp4l[5633.964]: master offset 13917644 s0 freq +100000000 path delay 216194 ptp4l[5634.964]: master offset 13925743 s0 freq +100000000 path delay 215361 ptp4l[5635.964]: master offset 13917830 s0 freq +100000000 path delay 215361 ptp4l[5636.964]: master offset 13912677 s0 freq +100000000 path delay 215361 ptp4l[5637.965]: master offset 13921067 s0 freq +100000000 path delay 214761 ptp4l[5638.965]: master offset 13934802 s0 freq +100000000 path delay 213895 ptp4l[5639.965]: master offset 13926352 s1 freq +100000000 path delay 210569 ptp4l[5640.965]: master offset 7550 s2 freq +100000000 path delay 210569 ptp4l[5640.965]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED ptp4l[5641.965]: master offset 3335 s2 freq +100000000 path delay 209862 ptp4l[5642.965]: master offset 29048 s2 freq +100000000 path delay 198419 ptp4l[5643.965]: master offset -6089 s2 freq +99999385 path delay 198419 ptp4l[5644.965]: master offset 27372 s2 freq +100000000 path delay 194745 ptp4l[5645.966]: master offset 41165 s2 freq +100000000 path delay 180458 ptp4l[5646.966]: master offset 67436 s2 freq +100000000 path delay 180458 ptp4l[5647.966]: master offset 52707 s2 freq +100000000 path delay 180458 ptp4l[5648.966]: master offset 45178 s2 freq +100000000 path delay 195554 ptp4l[5649.966]: master offset 29094 s2 freq +100000000 path delay 195554 ptp4l[5650.966]: master offset -40457 s2 freq +99995908 path delay 203668 ptp4l[5651.966]: master offset 61863 s2 freq +100000000 path delay 189220 ptp4l[5652.966]: master offset -30990 s2 freq +99996823 path delay 203668 ptp4l[5653.967]: master offset 35655 s2 freq +100000000 path delay 203668 ptp4l[5654.967]: master offset 54452 s2 freq +100000000 path delay 203668 ptp4l[5655.967]: master offset -14750 s2 freq +99998433 path delay 203668 ptp4l[5656.967]: master offset 46659 s2 freq +100000000 path delay 197680 ptp4l[5657.967]: master offset -31081 s2 freq +99996768 path delay 193387 ptp4l[5658.967]: master offset 78940 s2 freq +100000000 path delay 193387 ptp4l[5659.967]: master offset 72995 s2 freq +100000000 path delay 188131 ptp4l[5660.968]: master offset 87009 s2 freq +100000000 path delay 188035 ptp4l[5661.968]: master offset 69708 s2 freq +100000000 path delay 189077 ptp4l[5662.968]: master offset 13182 s2 freq +100000000 path delay 189077 ptp4l[5663.968]: master offset 102075 s2 freq +100000000 path delay 189077 ptp4l[5664.968]: master offset 95211 s2 freq +100000000 path delay 189077 ptp4l[5665.968]: master offset 21393 s2 freq +100000000 path delay 189077 ptp4l[5666.968]: master offset 88257 s2 freq +100000000 path delay 189077 ptp4l[5667.968]: master offset 102154 s2 freq +100000000 path delay 189077 ptp4l[5668.968]: master offset 97624 s2 freq +100000000 path delay 189364 ptp4l[5669.968]: master offset 30572 s2 freq +100000000 path delay 189268 ptp4l[5670.969]: master offset 105652 s2 freq +100000000 path delay 189268 ptp4l[5671.969]: master offset 87663 s2 freq +100000000 path delay 189268 ptp4l[5672.969]: master offset -9329 s2 freq +99998934 path delay 200527 ptp4l[5673.969]: master offset 32310 s2 freq +100000000 path delay 187668 ptp4l[5674.969]: master offset -1504500840665 s2 freq -100000000 path delay 187668 ptp4l[5676.191]: master offset -1503498828645 s2 freq -100000000 path delay 187668 ptp4l[5677.414]: master offset -1503276540145 s2 freq -100000000 path delay 172311 ptp4l[5678.636]: master offset -1503054281517 s2 freq -100000000 path delay 172311 ptp4l[5679.859]: master offset -1502831998290 s2 freq -100000000 path delay 148551 ptp4l[5681.081]: master offset -1502592391017 s2 freq -100000000 path delay -17222716 ptp4l[5682.303]: master offset -1502337842414 s2 freq -100000000 path delay -49505012 ptp4l[5683.526]: master offset -1502099177098 s2 freq -100000000 path delay -65942473 ptp4l[5684.748]: master offset -1501876912775 s2 freq -100000000 path delay -65942473 ptp4l[5685.970]: master offset -1501661138297 s2 freq -100000000 path delay -59498317 ptp4l[5687.193]: master offset -1501435506311 s2 freq -100000000 path delay -62944579 ptp4l[5688.415]: master offset -1501213173765 s2 freq -100000000 path delay -62944579 ptp4l[5689.637]: master offset -1500990924540 s2 freq -100000000 path delay -62944579 ptp4l[5690.860]: master offset -1500775085926 s2 freq -100000000 path delay -56542343 ptp4l[5692.082]: master offset -1500550454220 s2 freq -100000000 path delay -59017651 ptp4l[5693.304]: master offset -1500323595017 s2 freq -100000000 path delay -63532925 ptp4l[5694.527]: master offset -1500101323891 s2 freq -100000000 path delay -63532925 ptp4l[5695.749]: master offset -1499877252874 s2 freq -100000000 path delay -65385477 ptp4l[5696.972]: master offset -1499658928642 s2 freq -100000000 path delay -61458549 ptp4l[5698.194]: master offset -1499436676168 s2 freq -100000000 path delay -61458549 ptp4l[5699.416]: master offset -1499214443160 s2 freq -100000000 path delay -61458549 ptp4l[5700.639]: master offset -1498992192859 s2 freq -100000000 path delay -61458549 ptp4l[5701.861]: master offset -1498771148926 s2 freq -100000000 path delay -60241977 ptp4l[5703.083]: master offset -1498548935865 s2 freq -100000000 path delay -60241977 ptp4l[5704.306]: master offset -1498326670561 s2 freq -100000000 path delay -60241977 ptp4l[5705.528]: master offset -1498103941548 s2 freq -100000000 path delay -60729906 ptp4l[5706.750]: master offset -1497881691115 s2 freq -100000000 path delay -60729906 ptp4l[5707.972]: master offset -1497660321226 s2 freq -100000000 path delay -59919762 ptp4l[5709.195]: master offset -1497434446001 s2 freq -100000000 path delay -63476816 ptp4l[5710.417]: master offset -1497207655400 s2 freq -100000000 path delay -68049885 ptp4l[5711.640]: master offset -1496985382189 s2 freq -100000000 path delay -68049885 ptp4l[5712.862]: master offset -1496744819952 s2 freq -100000000 path delay -86396769 ptp4l[5714.084]: master offset -1496527418428 s2 freq -100000000 path delay -81507676 ptp4l[5715.307]: master offset -1496314631014 s2 freq -100000000 path delay -72051250 ptp4l[5716.529]: master offset -1496092356776 s2 freq -100000000 path delay -72051250 ptp4l[5717.752]: master offset -1495866685965 s2 freq -100000000 path delay -75475651 ptp4l[5718.974]: master offset -1495659636081 s2 freq -100000000 path delay -60369227 ptp4l[5720.196]: master offset -1495422196903 s2 freq -100000000 path delay -75475651 ptp4l[5721.419]: master offset -1495212294793 s2 freq -100000000 path delay -63151399 ptp4l[5722.641]: master offset -1494995684534 s2 freq -100000000 path delay -57501401 ptp4l[5723.863]: master offset -1494773429201 s2 freq -100000000 path delay -57501401 ptp4l[5725.086]: master offset -1494536830363 s2 freq -100000000 path delay -71843099 ptp4l[5726.308]: master offset -1494314686157 s2 freq -100000000 path delay -71843099 ^Ccve@cve-sbc-flt2:~$ _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
