[Linuxptp-users] Getting started with gptp
Hi Team, As I am trying to getting started with ptp, as a first step, I was checking if there is any helping hand for setting up gptp client on linux machine and if there is any hands own project kind of thing (c/c++) through which we can familiarize the apis and working flow of gptp. Basically how to use gptp within a PL like c/c++. Thanks..! Bye Jithin Disclaimer: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient of this message , or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments. If you are not the intended recipient, you are hereby notified that any use, dissemination, copying, or storage of this message or its attachments is strictly prohibited. Email transmission cannot be guaranteed to be secure or error-free, as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender, therefore, does not accept liability for any errors, omissions or contaminations in the contents of this message which might have occurred as a result of email transmission. If verification is required, please request for a hard-copy version. ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC
Ah yeah, I didnt read well. That really improved the sync quality - thanks a lot for your advice! On 3/10/23 14:38, Miroslav Lichvar wrote: On Tue, Oct 03, 2023 at 02:33:32PM +0200, Nils Fuerste wrote: Thanks for your help! Unfortunately, setting those values doesn't work for me. I get the following errors: sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m -1.0 is an out of range value for option pi_proportional_const at line 73 failed to parse configuration file ./default-new-master.cfg It should be pi_proportional_exponent, not pi_proportional_const. $ sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m P is a malformed value for option pi_proportional_scale at line 75 failed to parse configuration file ./default-new-master.cfg P and I should be replaced with the values from the table. ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC
On Tue, Oct 03, 2023 at 02:33:32PM +0200, Nils Fuerste wrote: > Thanks for your help! Unfortunately, setting those values doesn't work for > me. I get the following errors: > > sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m > -1.0 is an out of range value for option pi_proportional_const at line 73 > failed to parse configuration file ./default-new-master.cfg It should be pi_proportional_exponent, not pi_proportional_const. > $ sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m > P is a malformed value for option pi_proportional_scale at line 75 > failed to parse configuration file ./default-new-master.cfg P and I should be replaced with the values from the table. -- Miroslav Lichvar ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC
Thanks for your help! Unfortunately, setting those values doesn't work for me. I get the following errors: sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m -1.0 is an out of range value for option pi_proportional_const at line 73 failed to parse configuration file ./default-new-master.cfg or $ sudo ptp4l -2 -i enp1s0f1 -f ./default-new-master.cfg -m P is a malformed value for option pi_proportional_scale at line 75 failed to parse configuration file ./default-new-master.cfg I am on tag v4.1. Any ideas why this is not working? On 3/10/23 12:28, Miroslav Lichvar wrote: On Tue, Oct 03, 2023 at 11:45:49AM +0200, Nils Fuerste wrote: I have a 82599ES from Intel [1]. I found the paramters you were referring to but I am not sure how to adjust them. Can you give me some guidance for this if you get a chance? Try this: pi_proportional_exponent -1 pi_integral_exponent -1 pi_proportional_scale P pi_integral_scale I where P and I are from one line of this table: 0.316 0.01562 0.158 0.00391 0.079 0.00098 0.040 0.00024 0.020 0.6 This is the NTPv4 (RFC 5905) PLL at five different gains. If the sync interval is -4 (16 sync messages per second), try the middle pair first. ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC
On Tue, Oct 03, 2023 at 11:45:49AM +0200, Nils Fuerste wrote: > I have a 82599ES from Intel [1]. I found the paramters you were referring to > but I am not sure how to adjust them. Can you give me some guidance for this > if you get a chance? Try this: pi_proportional_exponent -1 pi_integral_exponent -1 pi_proportional_scale P pi_integral_scale I where P and I are from one line of this table: 0.316 0.01562 0.158 0.00391 0.079 0.00098 0.040 0.00024 0.020 0.6 This is the NTPv4 (RFC 5905) PLL at five different gains. If the sync interval is -4 (16 sync messages per second), try the middle pair first. -- Miroslav Lichvar ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
Re: [Linuxptp-users] Configuration for boundary clock with on two-port NIC
Thanks for the quick answer! I have a 82599ES from Intel [1]. I found the paramters you were referring to but I am not sure how to adjust them. Can you give me some guidance for this if you get a chance? These are my current settings, basically the default.cfg: pi_proportional_const 0.0 pi_integral_const 0.0 pi_proportional_scale 0.0 pi_proportional_exponent -0.3 pi_proportional_norm_max 0.7 pi_integral_scale 0.0 pi_integral_exponent 0.4 pi_integral_norm_max 0.3 Thanks for the help! Best regards Nils [1] https://www.intel.la/content/www/xl/es/products/sku/41282/intel-82599es-10-gigabit-ethernet-controller/specifications.html On 2/10/23 11:12, Miroslav Lichvar wrote: On Mon, Oct 02, 2023 at 09:44:19AM +0200, Nils Fuerste wrote: Unfortunately, the sync on the server receiving the sync from the BC looks like this: ptp4l[3297.441]: master offset 42 s2 freq +9338 path delay 319 ptp4l[3298.441]: master offset -10 s2 freq +9298 path delay 319 ptp4l[3299.441]: master offset 19 s2 freq +9324 path delay 319 That doesn't look too bad. Is there a way to improve the configuration? I found the boundary_clock_jbod parameter but setting it to 1 didn't improve the sync. jbod is only needed when the ports don't share the same clock. It degrades the sync quality. Can someone provide a configuration for a simple BC setup with one two-port NIC? What is the sync quality I can expect? Any help is appreciated! Thanks in advance! It depends on the hardware. What NIC do you have? One thing you can try is to shorten the sync interval and decrease the PI constants, also on the client's port of the server to minimize the frequency noise transferred to the client. ___ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
