OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun Nov 23, 2025 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3408761	99	49	42,5	cyclictest	3683137	-21	latency_hist	23:35:00	3
3408761	99	45	39,4	cyclictest	3476165	-21	latency_hist	20:15:01	3
3408757	99	40	35,4	cyclictest	3492254	-21	kworker/u8:1+flush-259:0	21:20:00	2
3408751	99	40	36,3	cyclictest	3512412	-21	gpgv	20:50:01	0
3408757	99	36	28,5	cyclictest	3419070	-21	latency_hist	19:20:00	2
3408757	99	35	29,4	cyclictest	3678008	-21	latency_hist	23:30:00	2
3408755	99	34	28,4	cyclictest	2698871	-21	systemd-journal	22:35:01	1
3408755	99	33	28,3	cyclictest	3424247	-21	latency_hist	19:25:00	1
3408761	99	32	26,4	cyclictest	3512292	-21	latency_hist	20:50:01	3
3408755	99	31	26,3	cyclictest	3413937	-21	latency_hist	19:15:00	1
3408757	99	30	23,5	cyclictest	3517017	-21	ntpq	20:50:22	2
3408757	99	30	22,7	cyclictest	3002	-21	cron	00:05:00	2
3408757	99	30	22,7	cyclictest	3002	-21	cron	00:05:00	2
3408757	99	29	24,3	cyclictest	3590144	-21	/usr/sbin/munin	22:05:14	2
3408757	99	29	23,4	cyclictest	3647069	-21	latency_hist	23:00:01	2
3408751	99	29	26,2	cyclictest	3678026	-21	kworker/u8:1+flush-259:0	23:35:12	0
3408757	99	28	23,3	cyclictest	3739677	-21	apt-get	00:30:00	2
3408757	99	28	22,4	cyclictest	3708806	-21	latency_hist	00:00:01	2
3408751	99	28	22,4	cyclictest	3600228	-21	latency_hist	22:15:01	0
3408761	99	27	19,5	cyclictest	3481326	-21	latency_hist	20:20:00	3
3408755	99	27	21,4	cyclictest	3641527	-21	latency_hist	22:55:01	1
3408757	99	26	22,3	cyclictest	3709085	-21	kworker/u8:3+flush-259:0	00:10:17	2
3408751	99	26	23,2	cyclictest	3709085	-21	kworker/u8:3+flush-259:0	00:05:13	0
3408751	99	26	22,3	cyclictest	3621133	-21	kworker/u8:3+flush-259:0	22:40:25	0
3408755	99	25	20,4	cyclictest	3739707	-21	gpgv	00:30:00	1
3408755	99	25	19,4	cyclictest	2698871	-21	systemd-journal	00:34:34	1
3408751	99	25	20,4	cyclictest	3492254	-21	kworker/u8:1+events_unbound	20:55:00	0
3408757	99	24	21,2	cyclictest	3465878	-21	kworker/u8:0+flush-259:0	20:30:25	2
3408757	99	24	18,4	cyclictest	3439681	-21	latency_hist	19:40:00	2
3408755	99	24	21,2	cyclictest	3445077	-21	apt-get	19:45:11	1
3408751	99	24	20,3	cyclictest	3647293	-21	kworker/u8:4+flush-259:0	23:25:22	0
3408757	99	23	19,3	cyclictest	3693118	-21	kworker/u8:0+flush-259:0	23:45:18	2
3408755	99	23	19,3	cyclictest	3709085	-21	kworker/u8:3+flush-259:0	00:00:20	1
3408755	99	23	19,3	cyclictest	3709085	-21	kworker/u8:3+flush-259:0	00:00:20	1
3408755	99	23	18,4	cyclictest	3349678	-21	kworker/u8:0+flush-259:0	19:35:01	1
3408755	99	23	18,4	cyclictest	3349678	-21	kworker/u8:0+flush-259:0	19:35:00	1
3408755	99	23	18,3	cyclictest	2698871	-21	systemd-journal	20:22:17	1
3408755	99	23	17,3	cyclictest	3492254	-21	kworker/u8:1+events_unbound	21:00:20	1
3408751	99	23	19,3	cyclictest	3719137	-21	kworker/u8:1+flush-259:0	00:35:25	0
3408751	99	23	19,3	cyclictest	3719137	-21	kworker/u8:1+events_unbound	00:30:15	0
3408751	99	23	19,3	cyclictest	3387789	-21	kworker/u8:3+events_unbound	19:50:02	0
3408761	99	22	19,2	cyclictest	0	-21	swapper/3	21:35:00	3
3408757	99	22	19,2	cyclictest	3349678	-21	kworker/u8:0+flush-259:0	19:45:16	2
3408757	99	22	16,4	cyclictest	0	-21	swapper/2	21:35:00	2
3408755	99	22	19,2	cyclictest	3455791	-21	kworker/u8:4+flush-259:0	20:00:20	1
3408755	99	22	1,19	cyclictest	1	-21	systemd	22:45:01	1
3408751	99	22	19,2	cyclictest	3349678	-21	kworker/u8:0+flush-259:0	19:40:27	0
3408751	99	22	18,3	cyclictest	3678026	-21	kworker/u8:1+flush-259:0	23:50:24	0
3408751	99	22	18,3	cyclictest	3349678	-21	kworker/u8:0+events_unbound	19:45:19	0
3408751	99	22	18,3	cyclictest	3349678	-21	kworker/u8:0+events_unbound	19:10:17	0
3408751	99	22	16,4	cyclictest	3528171	-21	latency_hist	21:05:01	0
3408751	99	22	16,4	cyclictest	3492254	-21	kworker/u8:1+events_unbound	21:20:18	0
3408751	99	22	16,4	cyclictest	3434543	-21	latency_hist	19:35:01	0
3408751	99	22	16,4	cyclictest	3434543	-21	latency_hist	19:35:00	0
3408761	99	21	17,3	cyclictest	3595068	-21	kworker/u8:1+flush-259:0	22:15:00	3
3408761	99	21	15,4	cyclictest	3492254	-21	kworker/u8:1+flush-259:0	21:05:18	3
3408757	99	21	18,2	cyclictest	3693118	-21	kworker/u8:0+flush-259:0	23:50:18	2
3408757	99	21	17,3	cyclictest	3465878	-21	kworker/u8:0+flush-259:0	20:20:26	2
3408757	99	21	15,4	cyclictest	3693393	-21	latency_hist	23:45:00	2
3408755	99	21	16,3	cyclictest	3455828	-21	apt-get	19:55:15	1
3408751	99	21	18,2	cyclictest	3672871	-21	latency_hist	23:25:00	0
3408751	99	21	18,2	cyclictest	3600459	-21	kworker/u8:0+events_unbound	22:15:23	0
3408751	99	21	17,3	cyclictest	3693118	-21	kworker/u8:0+events_unbound	00:14:42	0
3408751	99	21	17,3	cyclictest	3621133	-21	kworker/u8:3+flush-259:0	22:50:27	0
3408761	99	20	13,5	cyclictest	3496834	-21	latency_hist	20:35:00	3
3408757	99	20	17,2	cyclictest	3360429	-21	kworker/u8:1+events_unbound	19:30:00	2
3408755	99	20	16,3	cyclictest	3719137	-21	kworker/u8:1+flush-259:0	00:35:16	1
3408755	99	20	15,3	cyclictest	3662547	-21	sh	23:15:00	1
3408751	99	20	16,3	cyclictest	3657663	-21	apt-get	23:10:12	0
3408751	99	20	16,3	cyclictest	3620946	-21	kworker/u8:1+events_unbound	22:47:56	0
3408751	99	20	16,3	cyclictest	3466091	-21	kworker/u8:2+events_unbound	21:30:18	0
3408751	99	20	14,4	cyclictest	2698871	-21	systemd-journal	20:15:00	0
3408757	99	19	16,2	cyclictest	3466091	-21	kworker/u8:2+flush-259:0	20:27:22	2
3408757	99	19	14,4	cyclictest	2698871	-21	systemd-journal	23:02:42	2
3408757	99	19	13,4	cyclictest	3492254	-21	kworker/u8:1+flush-259:0	21:00:18	2
3408757	99	19	12,5	cyclictest	2698871	-21	systemd-journal	00:16:42	2
3408755	99	19	16,2	cyclictest	3000063	-21	rs:main		1
3408755	99	19	15,2	cyclictest	3647087	-21	kworker/u8:2+flush-259:0	23:40:17	1
3408755	99	19	14,4	cyclictest	3444835	-21	kworker/u8:1+events_unbound	20:10:17	1
3408751	99	19	15,3	cyclictest	3647087	-21	kworker/u8:2+events_unbound	23:40:23	0
3408751	99	19	15,3	cyclictest	3548753	-21	kworker/u8:0+events_unbound	21:44:43	0
3408751	99	19	15,3	cyclictest	3548753	-21	kworker/u8:0+events_unbound	21:44:42	0
3408751	99	19	15,3	cyclictest	3548753	-21	kworker/u8:0+events_unbound	21:37:43	0
3408751	99	19	15,3	cyclictest	3466091	-21	kworker/u8:2+events_unbound	20:44:41	0
3408751	99	19	12,5	cyclictest	2698871	-21	systemd-journal	22:10:00	0
3408761	99	18	9,7	cyclictest	3517473	-21	unixbench_singl	20:50:26	3
3408761	99	18	15,2	cyclictest	3628651	-21	kthreadcore	22:40:18	3
3408761	99	18	14,2	cyclictest	3387789	-21	kworker/u8:3+flush-259:0	19:15:16	3
3408761	99	18	13,4	cyclictest	3466127	-21	apt-get	20:05:13	3
3408757	99	18	14,3	cyclictest	3548753	-21	kworker/u8:0+flush-259:0	21:59:59	2
3408757	99	18	14,3	cyclictest	3360429	-21	kworker/u8:1+flush-259:0	19:20:17	2
3408755	99	18	15,2	cyclictest	3651311	-21	ntp_kernel_pll_	23:00:21	1
3408755	99	18	14,3	cyclictest	3349678	-21	kworker/u8:0+flush-259:0	19:25:15	1
3408755	99	18	13,3	cyclictest	3466091	-21	kworker/u8:2+flush-259:0	21:50:17	1
3408751	99	18	15,2	cyclictest	3636409	-21	kworker/u8:0+flush-259:0	23:05:11	0
3408751	99	18	15,2	cyclictest	3636409	-21	kworker/u8:0+flush-259:0	23:00:15	0
3408751	99	18	15,2	cyclictest	3466091	-21	kworker/u8:2+flush-259:0	20:25:42	0
3408751	99	18	14,3	cyclictest	3719137	-21	kworker/u8:1+flush-259:0	00:20:26	0
3408751	99	18	14,3	cyclictest	3620946	-21	kworker/u8:1+events_unbound	22:35:23	0
3408751	99	18	14,3	cyclictest	3466091	-21	kworker/u8:2+events_unbound	21:55:28	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34