OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Tue Jul 07, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3553668	99	174	170,2	cyclictest	0	-21	swapper/1	12:25:21	1
3553672	99	156	150,3	cyclictest	3873632	-21	ntpq	12:25:21	2
3710559	2	151	0,3	sleep3	75	-21	kworker/3:1-events	09:45:11	3
3783233	2	76	0,4	chrt	0	-21	swapper/1	10:55:15	1
3553663	99	72	57,14	cyclictest	0	-21	swapper/0	12:25:20	0
3553668	99	70	57,10	cyclictest	3884433	-21	latency_hist	12:40:01	1
3553663	99	67	64,2	cyclictest	3839556	-21	kworker/u8:3+events_unbound	12:00:25	0
3553663	99	66	61,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:00:23	0
3553663	99	61	58,2	cyclictest	3804740	-21	kworker/u8:0+events_unbound	11:20:25	0
3553663	99	60	57,2	cyclictest	3825288	-21	kworker/u8:2+events_unbound	11:45:24	0
3553663	99	60	57,2	cyclictest	3825288	-21	kworker/u8:2+events_unbound	11:45:23	0
3814028	2	59	0,1	sleep0	3814031	-21	sed	11:25:20	0
3553663	99	59	53,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	09:00:23	0
3553668	99	58	49,6	cyclictest	3804984	-21	latency_hist	11:20:00	1
3553663	99	58	53,4	cyclictest	3700559	-21	kworker/u8:1+events_unbound	09:50:25	0
3553663	99	57	51,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:55:24	0
3553663	99	57	49,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	09:10:25	0
3553668	99	56	44,9	cyclictest	3728975	-21	ntpq	10:00:20	1
3553663	99	56	53,2	cyclictest	3760156	-21	kworker/u8:0+events_unbound	10:40:24	0
3553663	99	56	52,3	cyclictest	3690108	-21	kworker/u8:3+events_unbound	09:35:24	0
3553663	99	56	52,3	cyclictest	2561318	-21	kworker/u8:1+events_unbound	07:20:24	0
3553668	99	55	45,8	cyclictest	3744088	-21	ntpq	10:15:22	1
3553668	99	54	47,5	cyclictest	3604786	-21	ntpq	07:55:19	1
3553663	99	54	50,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	09:05:23	0
3553668	99	53	43,7	cyclictest	1704890	-21	systemd-journal	12:30:23	1
3553663	99	53	50,2	cyclictest	3700559	-21	kworker/u8:1+events_unbound	09:45:25	0
3553663	99	53	49,3	cyclictest	3754865	-21	kworker/u8:3+events_unbound	11:15:21	0
3553672	99	52	40,9	cyclictest	3615600	-21	/usr/sbin/munin	08:10:00	2
3553668	99	52	40,8	cyclictest	1704890	-21	systemd-journal	08:16:22	1
3553663	99	52	48,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	07:50:24	0
3553668	99	51	44,5	cyclictest	3490846	-21	kworker/u8:0+flush-8:0	08:35:24	1
3553663	99	51	47,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	09:25:25	0
3553663	99	51	42,6	cyclictest	3709943	-21	latency_hist	09:45:02	0
3553663	99	49	45,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	08:15:25	0
3553663	99	49	42,5	cyclictest	3754865	-21	kworker/u8:3+events_unbound	10:55:20	0
3553668	99	48	36,9	cyclictest	3679245	-21	ntpq	09:10:19	1
3553663	99	47	44,2	cyclictest	3754865	-21	kworker/u8:3+events_unbound	10:50:12	0
3553663	99	47	43,3	cyclictest	3765389	-21	kworker/u8:1+events_unbound	11:40:19	0
3553663	99	47	43,3	cyclictest	2561318	-21	kworker/u8:1+events_unbound	07:16:22	0
3553663	99	47	42,4	cyclictest	3553518	-21	kworker/u8:3+events_unbound	07:10:08	0
3553663	99	46	42,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	09:20:26	0
3553663	99	46	42,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	09:20:25	0
3553663	99	46	40,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	07:55:20	0
3553668	99	45	38,4	cyclictest	2561318	-21	kworker/u8:1+flush-8:0	07:19:59	1
3553663	99	45	41,3	cyclictest	3804740	-21	kworker/u8:0+events_unbound	11:35:10	0
3553663	99	45	41,3	cyclictest	3765389	-21	kworker/u8:1+events_unbound	12:15:10	0
3553663	99	45	41,3	cyclictest	3734853	-21	kworker/u8:1+events_unbound	10:30:18	0
3553663	99	45	41,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	08:35:30	0
3553663	99	45	41,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	07:42:21	0
3553663	99	44	41,2	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:40:30	0
3553663	99	44	40,3	cyclictest	3864049	-21	kworker/u8:0+events_unbound	12:35:13	0
3553663	99	44	40,3	cyclictest	3849376	-21	kworker/u8:2+events_unbound	12:22:23	0
3553663	99	44	40,3	cyclictest	3765389	-21	kworker/u8:1+events_unbound	11:05:13	0
3553663	99	44	40,3	cyclictest	3765389	-21	kworker/u8:1+events_unbound	10:49:44	0
3553663	99	44	40,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	08:10:30	0
3553668	99	43	34,7	cyclictest	3585585	-21	apt-get	07:40:01	1
3553668	99	43	33,8	cyclictest	1704890	-21	systemd-journal	12:10:01	1
3553663	99	43	40,2	cyclictest	3849376	-21	kworker/u8:2+events_unbound	12:34:37	0
3553663	99	43	40,2	cyclictest	3765389	-21	kworker/u8:1+events_unbound	11:04:24	0
3553663	99	43	40,2	cyclictest	3704588	-21	kworker/u8:4+events_unbound	10:10:13	0
3553663	99	43	39,3	cyclictest	3704588	-21	kworker/u8:4+events_unbound	10:23:22	0
3553663	99	43	39,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:45:14	0
3553663	99	43	29,12	cyclictest	1704890	-21	systemd-journal	08:25:22	0
3553668	99	42	35,5	cyclictest	3635863	-21	apt-get	08:30:07	1
3553668	99	42	35,5	cyclictest	1704890	-21	systemd-journal	12:00:00	1
3553668	99	42	33,6	cyclictest	3655410	-21	latency_hist	08:50:01	1
3553668	99	42	30,9	cyclictest	1704890	-21	systemd-journal	09:36:21	1
3553663	99	42	38,3	cyclictest	3804740	-21	kworker/u8:0+events_unbound	11:50:39	0
3553663	99	42	37,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	07:46:22	0
3553663	99	42	26,11	cyclictest	1704890	-21	systemd-journal	12:09:56	0
3553668	99	41	35,4	cyclictest	3490846	-21	kworker/u8:0+flush-8:0	08:10:12	1
3553668	99	41	34,4	cyclictest	3765389	-21	kworker/u8:1+flush-8:0	11:00:20	1
3553663	99	41	38,2	cyclictest	3690108	-21	kworker/u8:3+events_unbound	09:34:32	0
3553663	99	41	37,3	cyclictest	3839556	-21	kworker/u8:3+events_unbound	11:56:37	0
3553663	99	41	37,3	cyclictest	3804740	-21	kworker/u8:0+events_unbound	11:32:23	0
3553663	99	41	37,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:10:01	0
3553668	99	40	31,7	cyclictest	3575385	-21	latency_hist	07:30:00	1
3553668	99	40	30,8	cyclictest	3848895	-21	ntpq	12:00:20	1
3553668	99	40	25,10	cyclictest	1704890	-21	systemd-journal	10:32:23	1
3553663	99	40	36,3	cyclictest	3719515	-21	kworker/u8:2+events_unbound	10:05:09	0
3553663	99	40	36,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	07:30:10	0
3553663	99	40	36,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	09:59:24	0
3553663	99	40	36,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	07:36:23	0
3553668	99	39	33,4	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:05:19	1
3553668	99	39	32,5	cyclictest	3585410	-21	kworker/u8:3+flush-8:0	08:25:28	1
3553663	99	39	36,2	cyclictest	3490846	-21	kworker/u8:0+events_unbound	09:17:00	0
3553663	99	39	35,3	cyclictest	3779469	-21	kworker/u8:4+events_unbound	11:12:23	0
3553668	99	38	30,6	cyclictest	3868705	-21	ntpq	12:20:22	1
3553663	99	38	34,3	cyclictest	3561071	-21	kworker/u8:2+events_unbound	08:24:21	0
3553663	99	38	34,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	08:50:14	0
3553663	99	38	34,3	cyclictest	3490846	-21	kworker/u8:0+events_unbound	07:29:12	0
3553668	99	37	26,8	cyclictest	1704890	-21	systemd-journal	08:21:21	1
3553663	99	37	34,2	cyclictest	3760156	-21	kworker/u8:0+events_unbound	10:35:12	0
3553663	99	37	34,2	cyclictest	3734853	-21	kworker/u8:1+events_unbound	10:25:29	0
3553663	99	37	33,3	cyclictest	3719515	-21	kworker/u8:2+events_unbound	10:02:38	0
3553663	99	37	33,3	cyclictest	3585410	-21	kworker/u8:3+events_unbound	08:32:21	0
3685936	2	36	0,8	sleep3	0	-21	swapper/3	09:20:15	3
3685936	2	36	0,8	sleep3	0	-21	swapper/3	09:20:15	3
3553668	99	36	30,4	cyclictest	3645823	-21	apt-get	08:40:07	1
3553668	99	36	28,6	cyclictest	3790315	-21	apt-get	11:05:06	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17