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 Mon Jul 06, 2026 12:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3879701	2	352	0,4	sleep3	48	1	ktimers/3	07:50:15	3
3836510	99	73	68,4	cyclictest	4047870	-21	kworker/u8:0+events_unbound	11:00:26	1
3836510	99	64	59,4	cyclictest	4002574	-21	kworker/u8:2+events_unbound	10:00:26	1
3836510	99	64	59,3	cyclictest	3897816	-21	kworker/u8:2+flush-8:0	08:20:25	1
3836506	99	63	53,8	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	07:10:27	0
3836510	99	60	55,3	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	11:10:23	1
3836510	99	59	53,4	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	07:15:02	1
3836510	99	57	52,3	cyclictest	3878154	-21	kworker/u8:1+events_unbound	09:10:25	1
3836510	99	57	51,4	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	11:30:21	1
3836510	99	57	51,4	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	11:30:20	1
3836510	99	55	51,3	cyclictest	3952957	-21	kworker/u8:3+events_unbound	09:50:25	1
3836510	99	55	51,3	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:45:22	1
3836510	99	55	50,3	cyclictest	3942787	-21	kworker/u8:0+events_unbound	09:25:25	1
3836510	99	55	49,5	cyclictest	3942787	-21	kworker/u8:0+flush-8:0	10:25:26	1
3836510	99	55	49,4	cyclictest	3863426	-21	kworker/u8:2+flush-8:0	07:40:21	1
3836510	99	54	49,4	cyclictest	3897816	-21	kworker/u8:2+flush-8:0	08:35:20	1
3836510	99	54	48,4	cyclictest	4047870	-21	kworker/u8:0+events_unbound	11:05:24	1
3836510	99	54	47,6	cyclictest	2473324	-21	kworker/u8:0+events_unbound	07:10:21	1
3836510	99	53	48,4	cyclictest	3897816	-21	kworker/u8:2+events_unbound	09:00:23	1
3836510	99	53	48,3	cyclictest	3942787	-21	kworker/u8:0+flush-8:0	09:15:26	1
3836510	99	53	46,5	cyclictest	4041975	-21	kworker/u8:1+flush-8:0	10:35:11	1
3836510	99	52	47,3	cyclictest	4041975	-21	kworker/u8:1+events_unbound	11:15:15	1
3836510	99	52	46,4	cyclictest	3952957	-21	kworker/u8:3+flush-8:0	10:40:22	1
3836510	99	52	45,5	cyclictest	4116812	-21	kworker/u8:3+events_unbound	11:50:23	1
3836510	99	51	47,3	cyclictest	4047870	-21	kworker/u8:0+events_unbound	11:25:10	1
3836510	99	51	47,3	cyclictest	4047870	-21	kworker/u8:0+events_unbound	11:25:09	1
3836510	99	51	47,3	cyclictest	4041975	-21	kworker/u8:1+events_unbound	10:55:24	1
3836510	99	51	46,3	cyclictest	3804469	-21	kworker/u8:3+flush-8:0	07:45:20	1
3836510	99	51	45,4	cyclictest	3967838	-21	kworker/u8:1+events_unbound	09:20:21	1
3836510	99	51	44,5	cyclictest	4047870	-21	kworker/u8:0+events_unbound	12:20:24	1
3836506	99	51	43,5	cyclictest	1704890	-21	systemd-journal	10:30:00	0
3836515	99	50	43,5	cyclictest	4082217	-21	gpgv	11:15:00	2
3836510	99	50	46,3	cyclictest	3878154	-21	kworker/u8:1+events_unbound	08:40:27	1
3836510	99	50	45,4	cyclictest	3942787	-21	kworker/u8:0+flush-8:0	09:40:23	1
3836510	99	50	44,5	cyclictest	4092513	-21	kworker/u8:2+flush-8:0	11:45:22	1
3836510	99	50	44,5	cyclictest	3952957	-21	kworker/u8:3+flush-8:0	11:20:18	1
3836510	99	50	44,4	cyclictest	4146290	-21	kworker/u8:3+events_unbound	12:15:24	1
3836510	99	50	44,4	cyclictest	3952957	-21	kworker/u8:3+flush-8:0	09:55:20	1
3836510	99	50	42,6	cyclictest	4056333	-21	ntpq	10:45:18	1
3836510	99	50	41,7	cyclictest	3907167	-21	ntpq	08:15:19	1
3836506	99	50	40,7	cyclictest	1704890	-21	systemd-journal	09:20:23	0
3836510	99	49	44,4	cyclictest	3804469	-21	kworker/u8:3+flush-8:0	07:25:21	1
3836510	99	49	43,4	cyclictest	4146290	-21	kworker/u8:3+events_unbound	12:35:30	1
3836515	99	48	41,5	cyclictest	1704890	-21	systemd-journal	12:00:01	2
3836510	99	48	43,4	cyclictest	3878154	-21	kworker/u8:1+flush-8:0	07:50:21	1
3836510	99	48	41,5	cyclictest	3952957	-21	kworker/u8:3+flush-8:0	10:20:21	1
3836510	99	48	39,7	cyclictest	3942787	-21	kworker/u8:0+events_unbound	10:30:22	1
3836506	99	48	43,3	cyclictest	4092513	-21	kworker/u8:2+flush-8:0	11:35:11	0
3836510	99	47	43,3	cyclictest	3942787	-21	kworker/u8:0+events_unbound	10:05:12	1
3836510	99	47	42,3	cyclictest	3952957	-21	kworker/u8:3+events_unbound	10:50:25	1
3836510	99	47	41,5	cyclictest	3897816	-21	kworker/u8:2+flush-8:0	08:10:22	1
3836510	99	47	41,4	cyclictest	3967838	-21	kworker/u8:1+events_unbound	09:30:18	1
3836510	99	46	40,4	cyclictest	4041975	-21	kworker/u8:1+events_unbound	11:55:17	1
3836510	99	46	40,3	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:55:12	1
3836510	99	46	40,3	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:55:12	1
3836510	99	45	39,5	cyclictest	2473324	-21	kworker/u8:0+events_unbound	08:05:18	1
3836506	99	45	38,5	cyclictest	3868404	-21	/usr/sbin/munin	07:40:19	0
3836510	99	44	39,3	cyclictest	4041975	-21	kworker/u8:1+events_unbound	12:05:22	1
3836510	99	44	37,5	cyclictest	3804469	-21	kworker/u8:3+flush-8:0	07:35:18	1
3836510	99	43	37,4	cyclictest	3967838	-21	kworker/u8:1+events_unbound	09:35:23	1
3836506	99	43	36,5	cyclictest	4092513	-21	kworker/u8:2+flush-8:0	11:40:16	0
3836510	99	42	37,4	cyclictest	3942787	-21	kworker/u8:0+events_unbound	10:10:09	1
3836506	99	42	36,4	cyclictest	4146290	-21	kworker/u8:3+events_unbound	12:25:25	0
3836506	99	42	35,5	cyclictest	3997641	-21	apt-get	09:50:06	0
3836510	99	41	38,2	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:25:28	1
3836510	99	41	37,3	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	07:55:28	1
3836510	99	41	35,4	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:50:23	1
3836510	99	41	35,4	cyclictest	3897816	-21	kworker/u8:2+events_unbound	08:50:23	1
3836510	99	41	30,8	cyclictest	1704890	-21	systemd-journal	12:35:00	1
3836506	99	41	36,4	cyclictest	4041975	-21	kworker/u8:1+events_unbound	10:40:19	0
3836510	99	40	35,4	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	08:00:21	1
3836510	99	40	34,4	cyclictest	4126703	-21	kworker/u8:2+events_unbound	12:00:23	1
3836506	99	40	35,3	cyclictest	3804469	-21	kworker/u8:3+flush-8:0	07:45:24	0
3836506	99	40	33,5	cyclictest	3857270	-21	ntpq	07:25:17	0
3836506	99	39	30,6	cyclictest	4117172	-21	latency_hist	11:50:02	0
3836510	99	38	32,4	cyclictest	4126703	-21	kworker/u8:2+events_unbound	12:10:16	1
3836506	99	38	32,4	cyclictest	4037633	-21	apt-get	10:30:09	0
3836510	99	37	33,3	cyclictest	4092513	-21	kworker/u8:2+flush-8:0	11:35:26	1
3836510	99	37	32,3	cyclictest	3836380	-21	kworker/u8:1+flush-8:0	07:20:19	1
3836506	99	37	33,3	cyclictest	3804469	-21	kworker/u8:3+events_unbound	07:35:20	0
3836506	99	37	32,4	cyclictest	3952957	-21	kworker/u8:3+flush-8:0	11:05:37	0
3836506	99	37	31,4	cyclictest	4072169	-21	latency_hist	11:05:01	0
3836506	99	37	28,7	cyclictest	2473324	-21	kworker/u8:0+events_unbound	08:05:22	0
3836515	99	36	29,4	cyclictest	3993030	-21	kworker/u8:2+events_unbound	09:45:30	2
3836506	99	36	30,5	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	08:30:21	0
3836506	99	36	27,7	cyclictest	1704890	-21	systemd-journal	10:00:01	0
3836510	99	35	30,3	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	12:25:16	1
3836506	99	35	31,3	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	11:25:26	0
3836506	99	35	31,3	cyclictest	4047870	-21	kworker/u8:0+flush-8:0	11:25:25	0
3836506	99	35	31,3	cyclictest	3878154	-21	kworker/u8:1+flush-8:0	08:45:17	0
4028852	2	34	0,3	sleep3	75	-21	kworker/3:1-events	10:20:14	3
3836506	99	34	29,4	cyclictest	4041975	-21	kworker/u8:1+flush-8:0	12:03:43	0
3836506	99	34	29,4	cyclictest	3878154	-21	kworker/u8:1+events_unbound	08:40:21	0
3836506	99	34	27,5	cyclictest	1704890	-21	systemd-journal	11:20:43	0
3836506	99	33	29,2	cyclictest	1	-21	systemd	10:55:00	0
3836506	99	33	23,7	cyclictest	3918026	-21	latency_hist	08:30:01	0
3836515	99	32	22,8	cyclictest	1704890	-21	systemd-journal	11:51:13	2
3836510	99	32	28,3	cyclictest	2473324	-21	kworker/u8:0+flush-8:0	08:30:17	1
3836510	99	32	26,2	cyclictest	3956698	-21	needreboot	09:05:19	1
3836510	99	32	24,6	cyclictest	3996437	-21	ntpq	09:45:19	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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