OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack0slot2.osadl.org (updated Sun Mar 29, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3652127	2	58	48,7	sleep5	0	-21	swapper/5	07:01:19	5
3652126	2	57	47,7	sleep4	0	-21	swapper/4	07:01:18	4
3652528	99	54	52,2	cyclictest	4073371	-21	kworker/u16:1+flush-8:0	11:25:22	6
3652523	99	54	52,2	cyclictest	4073371	-21	kworker/u16:1+flush-8:0	12:13:19	5
3652523	99	51	49,2	cyclictest	36136	-21	kworker/u16:3+events_unbound	11:30:53	5
3652519	99	51	49,2	cyclictest	4111991	-21	kworker/u16:3+flush-8:0	10:42:51	4
3652519	99	50	47,3	cyclictest	36138	-21	kworker/u16:5+flush-8:0	11:53:16	4
3652523	99	49	47,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	09:38:17	5
3652523	99	49	47,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	09:38:17	5
3652523	99	49	47,2	cyclictest	130449	-21	kworker/u16:2+events_unbound	12:08:11	5
3652523	99	47	44,3	cyclictest	109588	-21	kworker/u16:0+events_unbound	12:18:17	5
3652523	99	46	44,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:37:44	5
3652523	99	45	43,2	cyclictest	4073371	-21	kworker/u16:1+flush-8:0	11:43:20	5
3652523	99	45	43,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	10:36:16	5
3652523	99	45	43,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	10:26:36	5
3652523	99	44	42,2	cyclictest	109588	-21	kworker/u16:0+events_unbound	12:03:24	5
3652519	99	44	42,2	cyclictest	130449	-21	kworker/u16:2+events_unbound	12:08:23	4
3652519	99	44	41,2	cyclictest	109588	-21	kworker/u16:0+flush-8:0	12:02:50	4
3652523	99	43	41,2	cyclictest	4132873	-21	kworker/u16:0+events_unbound	10:49:00	5
3652523	99	43	40,2	cyclictest	3828226	-21	kworker/u16:3+events_unbound	09:02:53	5
3652523	99	43	39,2	cyclictest	3828226	-21	kworker/u16:3+events_unbound	09:17:44	5
3652536	99	42	37,4	cyclictest	650	-21	systemd-journal	11:30:21	7
3652523	99	42	40,2	cyclictest	191315	-21	kworker/u16:3+events_unbound	12:29:47	5
3652519	99	42	40,2	cyclictest	3967498	-21	kworker/u16:2+flush-8:0	09:37:51	4
3652519	99	42	40,2	cyclictest	3967498	-21	kworker/u16:2+flush-8:0	09:37:51	4
3652519	99	42	40,2	cyclictest	36365	-21	kworker/u16:6+flush-8:0	11:34:55	4
3652519	99	42	40,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:41:23	4
3652519	99	42	40,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:41:23	4
3652523	99	41	39,2	cyclictest	4132873	-21	kworker/u16:0+events_unbound	10:56:59	5
3652523	99	41	39,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:48:13	5
3652523	99	41	39,2	cyclictest	3967498	-21	kworker/u16:2+flush-8:0	09:47:50	5
3652523	99	41	39,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	09:26:57	5
3652519	99	41	39,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:48:23	4
3652523	99	40	38,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:15:47	5
3652523	99	40	38,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:55:23	5
3652523	99	40	38,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:38:56	5
3652523	99	40	38,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:38:56	5
3652523	99	39	37,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	10:47:44	5
3652523	99	39	37,2	cyclictest	109588	-21	kworker/u16:0+flush-8:0	12:23:20	5
3652519	99	39	37,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	09:44:44	4
3652519	99	39	37,2	cyclictest	36136	-21	kworker/u16:3+flush-8:0	11:25:04	4
3651988	2	39	6,29	sleep7	0	-21	swapper/7	06:59:21	7
3652523	99	38	36,2	cyclictest	4132873	-21	kworker/u16:0+events_unbound	11:10:20	5
3652523	99	38	36,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:21:40	5
3652523	99	38	36,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	10:30:44	5
3652523	99	38	36,2	cyclictest	36136	-21	kworker/u16:3+events_unbound	11:27:20	5
3652523	99	38	35,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	09:08:57	5
3652523	99	37	35,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	10:18:31	5
3652523	99	37	35,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	10:18:31	5
3652523	99	37	35,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	10:02:04	5
3652523	99	37	34,2	cyclictest	4073371	-21	kworker/u16:1+flush-8:0	11:57:55	5
3652519	99	37	35,2	cyclictest	4002869	-21	kworker/u16:3+events_unbound	09:53:11	4
3652528	99	36	34,2	cyclictest	3828226	-21	kworker/u16:3+flush-8:0	09:33:15	6
3652523	99	36	34,2	cyclictest	4002869	-21	kworker/u16:3+events_unbound	10:07:19	5
3652523	99	36	34,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	10:14:03	5
3652523	99	36	34,2	cyclictest	3846893	-21	kworker/u16:1+events_unbound	09:20:15	5
3652528	99	35	32,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	08:18:10	6
3652528	99	35	32,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	08:18:10	6
3652523	99	35	33,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	09:35:55	5
3652523	99	35	33,2	cyclictest	3846893	-21	kworker/u16:1+events_unbound	09:31:21	5
3652519	99	35	33,2	cyclictest	130449	-21	kworker/u16:2+flush-8:0	12:12:51	4
3652528	99	34	32,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:18:15	6
3652523	99	34	32,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	11:04:19	5
3652523	99	34	31,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	10:37:52	5
3652536	99	33	32,0	cyclictest	0	-21	swapper/7	11:39:41	7
3652536	99	33	32,0	cyclictest	0	-21	swapper/7	11:39:41	7
3652528	99	33	31,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	10:38:04	6
3652523	99	33	31,2	cyclictest	4132873	-21	kworker/u16:0+events_unbound	11:00:01	5
3652523	99	33	31,2	cyclictest	3684056	-21	kworker/u16:3+flush-8:0	07:53:16	5
3652523	99	33	31,2	cyclictest	3684056	-21	kworker/u16:3+events_unbound	07:48:18	5
3652519	99	33	31,2	cyclictest	36365	-21	kworker/u16:6+events_unbound	11:29:47	4
3651987	2	33	23,7	sleep6	0	-21	swapper/6	06:59:20	6
3652523	99	32	30,2	cyclictest	3846893	-21	kworker/u16:1+events_unbound	09:49:32	5
3652536	99	31	30,0	cyclictest	0	-21	swapper/7	09:39:49	7
3652536	99	31	30,0	cyclictest	0	-21	swapper/7	09:39:49	7
3652523	99	31	29,2	cyclictest	3967498	-21	kworker/u16:2+events_unbound	09:57:19	5
3652523	99	31	29,2	cyclictest	3828226	-21	kworker/u16:3+events_unbound	08:49:32	5
3652523	99	31	29,2	cyclictest	3814772	-21	kworker/u16:0+events_unbound	08:30:40	5
3652523	99	31	29,2	cyclictest	3684056	-21	kworker/u16:3+flush-8:0	07:58:17	5
3652523	99	30	28,2	cyclictest	3694429	-21	kworker/u16:1+events_unbound	07:38:24	5
3652523	99	30	28,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	08:26:28	5
3652523	99	30	27,2	cyclictest	3684056	-21	kworker/u16:3+events_unbound	08:03:01	5
3652536	99	29	24,4	cyclictest	650	-21	systemd-journal	09:57:51	7
3652528	99	29	27,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	10:08:02	6
3652528	99	29	27,2	cyclictest	3846893	-21	kworker/u16:1+flush-8:0	09:18:06	6
3652528	99	29	27,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	07:13:09	6
3652523	99	29	27,2	cyclictest	3814772	-21	kworker/u16:0+events_unbound	08:45:28	5
3652523	99	29	27,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	08:14:39	5
3652523	99	29	27,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	07:04:41	5
3652523	99	28	26,2	cyclictest	3885339	-21	kworker/u16:0+events_unbound	10:10:38	5
3652523	99	28	26,2	cyclictest	3828226	-21	kworker/u16:3+events_unbound	08:56:01	5
3652523	99	28	26,2	cyclictest	3643119	-21	kworker/u16:2+events_unbound	07:12:03	5
3652519	99	28	26,2	cyclictest	4073371	-21	kworker/u16:1+flush-8:0	11:03:28	4
3652519	99	28	26,2	cyclictest	3967498	-21	kworker/u16:2+flush-8:0	10:33:36	4
3652519	99	28	26,2	cyclictest	3846893	-21	kworker/u16:1+events_unbound	09:06:28	4
3652536	99	27	26,0	cyclictest	0	-21	swapper/7	07:40:56	7
3652536	99	27	25,1	cyclictest	3885297	-21	diskmemload	10:38:47	7
3652528	99	27	25,2	cyclictest	4073371	-21	kworker/u16:1+events_unbound	11:13:04	6
3652528	99	27	25,2	cyclictest	3846893	-21	kworker/u16:1+events_unbound	09:08:04	6
3652523	99	27	25,2	cyclictest	3828226	-21	kworker/u16:3+events_unbound	08:40:27	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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