Re: [Linuxptp-users] Loss of sync with 25% of CPU load
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Re: [Linuxptp-users] Loss of sync with 25% of CPU load
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From: Diego G. P. <gpr...@un...> - 2021-04-12 17:43:31
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Might it be fixed by disabling the sanity_freq_limit (--sanity_freq_limit 0) to avoid the message "clockcheck: ...jumped or slower than expected!"? Diego El 12/04/2021 a las 13:36, Diego García Prieto escribió: > I run it by changing the priorities to allow be higher the ptp4l than > the stress-ng but it still remains the same. What could I do to solve > that loss of sync when I apply 25% of CPU load? > > > Thank you in advance for your responses, > > Diego > > > El 07/04/2021 a las 18:31, Diego García Prieto escribió: >>> IOW, give it higher sched_fifo priority than stress-ng. >> Done but it keeps similar. ptp4l at 99 and stress-ng at 50 and even >> at 1 priority >>> >>> Also, depending on your network load, watch out for stress-ng starving >>> the networking stack (by keeping ksoftirqd from running). >>> >>> Also, watch out for stress-ng starving kworker threads (if your MAC >>> driver uses kwork to deliver Tx time stamps). >> >> I run it again with ptp4l at priority 99 and stress-ng at 50 and this >> is the load of ksoftirqd and kworkers. >> >> Tasks: 221 total, 3 running, 218 sleeping, 0 stopped, 0 zombie >> %Cpu(s): 31,7 us, 0,6 sy, 0,0 ni, 67,0 id, 0,7 wa, 0,0 hi, 0,0 >> si, 0,0 st >> KiB Mem : 3915948 total, 2980824 free, 372584 used, 562540 >> buff/cache >> KiB Swap: 1047548 total, 1047548 free, 0 used. 3333472 >> avail Mem >> >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >> 2754 root rt 0 32880 5372 3356 S 30,1 0,1 0:17.03 >> stress-ng-cpu >> 2755 root rt 0 32880 5372 3356 S 30,1 0,1 0:17.18 >> stress-ng-cpu >> 2756 root rt 0 32880 5372 3356 S 30,1 0,1 0:17.03 >> stress-ng-cpu >> 2757 root rt 0 32880 5372 3356 S 30,1 0,1 0:17.18 >> stress-ng-cpu >> 2177 nodo1 20 0 577400 33168 26052 S 1,7 0,8 0:02.24 >> gnome-panel >> 898 root 20 0 391732 69436 48052 S 1,3 1,8 0:18.87 Xorg >> 2483 nodo1 20 0 512104 37008 27552 S 1,0 0,9 0:11.07 >> gnome-terminal- >> 2173 nodo1 20 0 517256 37332 23772 S 0,7 1,0 0:08.11 compiz >> 2751 nodo1 20 0 43152 3964 3316 R 0,7 0,1 0:00.50 top >> 3 root 20 0 0 0 0 S 0,3 0,0 0:00.78 >> ksoftirqd/0 >> 21 root 20 0 0 0 0 S 0,3 0,0 0:00.67 >> ksoftirqd/1 >> 1901 nodo1 20 0 43428 3876 2780 S 0,3 0,1 0:00.64 >> dbus-daemon >> 1 root 20 0 119924 6024 3996 S 0,0 0,2 0:04.38 >> systemd >> 2 root 20 0 0 0 0 S 0,0 0,0 0:00.01 >> kthreadd >> 4 root -2 0 0 0 0 S 0,0 0,0 0:00.35 >> ktimersoftd/0 >> 6 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 >> kworker/0:0H >> 8 root 20 0 0 0 0 S 0,0 0,0 0:00.96 >> rcu_preempt >> 9 root 20 0 0 0 0 S 0,0 0,0 0:00.00 >> rcu_sched >> 10 root 20 0 0 0 0 S 0,0 0,0 0:00.25 rcuc/0 >> 11 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kswork >> 12 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> posixcputmr/0 >> 13 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> migration/0 >> 14 root rt 0 0 0 0 S 0,0 0,0 0:00.03 >> watchdog/0 >> 15 root 20 0 0 0 0 S 0,0 0,0 0:00.00 >> cpuhp/0 >> 16 root 20 0 0 0 0 S 0,0 0,0 0:00.00 >> cpuhp/1 >> 17 root rt 0 0 0 0 S 0,0 0,0 0:00.03 >> watchdog/1 >> 18 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> migration/1 >> 19 root 20 0 0 0 0 S 0,0 0,0 0:00.25 rcuc/1 >> 20 root -2 0 0 0 0 S 0,0 0,0 0:00.42 >> ktimersoftd/1 >> 23 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 >> kworker/1:0H >> 24 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> posixcputmr/1 >> 25 root 20 0 0 0 0 S 0,0 0,0 0:00.00 >> cpuhp/2 >> 26 root rt 0 0 0 0 S 0,0 0,0 0:00.04 >> watchdog/2 >> 27 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> migration/2 >> 28 root 20 0 0 0 0 R 0,0 0,0 0:00.51 rcuc/2 >> 29 root -2 0 0 0 0 S 0,0 0,0 0:00.43 >> ktimersoftd/2 >> 30 root 20 0 0 0 0 R 0,0 0,0 0:01.50 >> ksoftirqd/2 >> 32 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 >> kworker/2:0H >> 33 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> posixcputmr/2 >> 34 root 20 0 0 0 0 S 0,0 0,0 0:00.00 >> cpuhp/3 >> 35 root rt 0 0 0 0 S 0,0 0,0 0:00.04 >> watchdog/3 >> 36 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> migration/3 >> 37 root 20 0 0 0 0 S 0,0 0,0 0:00.53 rcuc/3 >> 38 root -2 0 0 0 0 S 0,0 0,0 0:01.13 >> ktimersoftd/3 >> 39 root 20 0 0 0 0 S 0,0 0,0 0:01.31 >> ksoftirqd/3 >> 41 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 >> kworker/3:0H >> 42 root rt 0 0 0 0 S 0,0 0,0 0:00.00 >> posixcputmr/3 >> >> >> Thank you, >> >> Diego >> >> >> >> _______________________________________________ >> Linuxptp-users mailing list >> Lin...@li... >> https://lists.sourceforge.net/lists/listinfo/linuxptp-users |
