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 Sat Feb 21, 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
3099656	2	58	47,7	sleep5	0	-21	swapper/5	07:00:34	5
3108673	2	54	44,7	sleep4	0	-21	swapper/4	07:04:02	4
3109039	99	53	50,2	cyclictest	3603958	-21	kworker/u16:1+events_unbound	10:55:16	4
3109049	99	45	39,5	cyclictest	3366107	-21	latency_hist	09:15:14	7
3109039	99	45	42,2	cyclictest	3353056	-21	kworker/u16:0+events_unbound	09:45:16	4
3109039	99	43	41,2	cyclictest	3400722	-21	kworker/u16:5+events_unbound	09:42:32	4
3109039	99	43	41,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	09:28:32	4
3109039	99	43	40,2	cyclictest	3353056	-21	kworker/u16:0+events_unbound	09:35:16	4
3108600	2	43	32,8	sleep6	0	-21	swapper/6	07:02:59	6
3109044	99	41	39,2	cyclictest	3218328	-21	kworker/u16:2+events_unbound	08:05:38	6
3109039	99	41	39,2	cyclictest	3679339	-21	kworker/u16:1+events_unbound	11:39:24	4
3109044	99	40	38,2	cyclictest	3179683	-21	kworker/u16:1+flush-8:0	08:00:42	6
3109039	99	40	38,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:33:52	4
3109039	99	40	38,2	cyclictest	3498594	-21	kworker/u16:5+events_unbound	10:10:17	4
3109039	99	40	38,2	cyclictest	3484630	-21	kworker/u16:2+events_unbound	10:28:04	4
3109039	99	40	38,2	cyclictest	3400723	-21	kworker/u16:6+events_unbound	09:32:36	4
3109039	99	40	38,2	cyclictest	3366108	-21	kworker/u16:4+flush-8:0	09:15:15	4
3109039	99	40	38,2	cyclictest	3366108	-21	kworker/u16:4+flush-8:0	09:15:15	4
3109049	99	39	37,1	cyclictest	3342096	-21	diskmemload	11:15:28	7
3109039	99	39	38,1	cyclictest	3519591	-21	kworker/u16:0+events_unbound	10:45:55	4
3109039	99	39	36,3	cyclictest	3629206	-21	kworker/u16:0+events_unbound	12:12:47	4
3109039	99	39	36,3	cyclictest	3400722	-21	kworker/u16:5+events_unbound	09:51:04	4
3109039	99	39	36,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	12:00:15	4
3109039	99	39	36,2	cyclictest	3568367	-21	kworker/u16:2+events_unbound	10:50:19	4
3109039	99	39	36,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	09:20:51	4
3108452	2	39	3,31	sleep7	0	-21	swapper/7	07:01:00	7
3109049	99	38	33,4	cyclictest	3558734	-21	latency_hist	10:35:14	7
3109039	99	38	36,2	cyclictest	3810020	-21	kworker/u16:1+events_unbound	12:32:59	4
3109039	99	38	36,2	cyclictest	3294350	-21	kworker/u16:3+flush-8:0	09:05:43	4
3109049	99	37	29,7	cyclictest	3426423	-21	latency_hist	09:40:14	7
3109044	99	37	35,2	cyclictest	3810020	-21	kworker/u16:1+events_unbound	12:18:59	6
3109044	99	37	35,2	cyclictest	3546645	-21	kworker/u16:1+events_unbound	10:38:08	6
3109044	99	37	35,2	cyclictest	3546645	-21	kworker/u16:1+events_unbound	10:38:08	6
3109039	99	37	35,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	11:56:13	4
3109039	99	37	35,2	cyclictest	3353056	-21	kworker/u16:0+flush-8:0	09:56:35	4
3109039	99	37	35,2	cyclictest	3353056	-21	kworker/u16:0+flush-8:0	09:56:35	4
3109049	99	36	29,6	cyclictest	650	-21	systemd-journal	12:15:13	7
3109044	99	36	34,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:45:08	6
3109039	99	36	34,2	cyclictest	3810020	-21	kworker/u16:1+events_unbound	12:28:22	4
3109039	99	36	34,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:54:47	4
3109039	99	36	34,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:54:47	4
3109039	99	36	34,2	cyclictest	3472238	-21	kworker/u16:1+events_unbound	10:03:23	4
3109039	99	36	34,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	11:08:43	4
3109039	99	36	34,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	10:06:07	4
3109044	99	35	33,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	11:56:38	6
3109044	99	35	33,2	cyclictest	3603958	-21	kworker/u16:1+events_unbound	10:59:32	6
3109039	99	35	33,2	cyclictest	3810020	-21	kworker/u16:1+events_unbound	12:20:44	4
3109039	99	35	33,2	cyclictest	3679339	-21	kworker/u16:1+events_unbound	11:28:59	4
3109039	99	35	33,2	cyclictest	3643310	-21	kworker/u16:2+events_unbound	11:42:59	4
3109039	99	35	33,2	cyclictest	3643310	-21	kworker/u16:2+events_unbound	11:21:35	4
3109039	99	35	33,2	cyclictest	3643310	-21	kworker/u16:2+events_unbound	11:14:04	4
3109039	99	35	33,2	cyclictest	3519591	-21	kworker/u16:0+events_unbound	10:39:32	4
3109039	99	35	33,2	cyclictest	3519591	-21	kworker/u16:0+events_unbound	10:39:32	4
3109039	99	35	33,2	cyclictest	3519591	-21	kworker/u16:0+events_unbound	10:32:03	4
3109039	99	35	33,2	cyclictest	3484630	-21	kworker/u16:2+events_unbound	10:17:39	4
3109049	99	34	29,4	cyclictest	650	-21	systemd-journal	10:10:14	7
3109044	99	34	32,2	cyclictest	3823435	-21	kworker/u16:4+events_unbound	12:31:33	6
3109044	99	34	32,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	11:18:39	6
3109040	99	34	32,2	cyclictest	3643310	-21	kworker/u16:2+events_unbound	11:30:39	5
3109039	99	34	32,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	12:08:00	4
3109039	99	34	32,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:49:16	4
3109039	99	34	32,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	11:01:24	4
3109039	99	34	32,2	cyclictest	3323099	-21	kworker/u16:1+events_unbound	09:14:20	4
3109039	99	34	32,2	cyclictest	3218328	-21	kworker/u16:2+flush-8:0	08:35:14	4
3109044	99	33	31,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	12:05:59	6
3109044	99	33	31,2	cyclictest	3519591	-21	kworker/u16:0+events_unbound	10:46:07	6
3109040	99	33	30,2	cyclictest	3366108	-21	kworker/u16:4+flush-8:0	10:05:31	5
3109039	99	33	31,2	cyclictest	3484630	-21	kworker/u16:2+events_unbound	10:23:27	4
3109049	99	32	26,5	cyclictest	3678910	-21	latency_hist	11:25:14	7
3109044	99	32	30,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	12:04:45	6
3109044	99	32	29,2	cyclictest	3323099	-21	kworker/u16:1+events_unbound	09:10:21	6
3109039	99	32	30,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	12:18:00	4
3109039	99	32	30,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	11:18:51	4
3109039	99	32	29,2	cyclictest	3568367	-21	kworker/u16:2+events_unbound	10:40:15	4
3109049	99	31	26,4	cyclictest	3642921	-21	latency_hist	11:10:13	7
3109044	99	31	29,2	cyclictest	3643310	-21	kworker/u16:2+events_unbound	11:29:38	6
3109044	99	31	29,2	cyclictest	3568367	-21	kworker/u16:2+events_unbound	10:40:58	6
3109044	99	31	29,2	cyclictest	3179683	-21	kworker/u16:1+events_unbound	08:00:00	6
3109044	99	31	29,2	cyclictest	3131958	-21	kworker/u16:1+events_unbound	07:24:28	6
3109049	99	30	24,5	cyclictest	3618900	-21	latency_hist	11:00:14	7
3109044	99	30	28,2	cyclictest	3629206	-21	kworker/u16:0+flush-8:0	12:11:11	6
3109044	99	30	28,2	cyclictest	3603958	-21	kworker/u16:1+events_unbound	10:54:18	6
3109044	99	30	28,2	cyclictest	3568367	-21	kworker/u16:2+flush-8:0	11:00:49	6
3109044	99	30	28,2	cyclictest	3546645	-21	kworker/u16:1+events_unbound	10:33:29	6
3109044	99	30	28,2	cyclictest	3400722	-21	kworker/u16:5+events_unbound	09:38:01	6
3109044	99	30	28,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	11:09:05	6
3109044	99	30	28,2	cyclictest	3353056	-21	kworker/u16:0+events_unbound	09:55:05	6
3109044	99	30	28,2	cyclictest	3264629	-21	kworker/u16:4+events_unbound	08:24:45	6
3109044	99	30	27,2	cyclictest	3400723	-21	kworker/u16:6+events_unbound	09:40:23	6
3109044	99	30	27,2	cyclictest	3353056	-21	kworker/u16:0+flush-8:0	09:27:55	6
3109044	99	29	27,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:52:38	6
3109044	99	29	27,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:52:38	6
3109044	99	29	27,2	cyclictest	3700504	-21	kworker/u16:3+events_unbound	11:32:42	6
3109044	99	29	27,2	cyclictest	3629206	-21	kworker/u16:0+events_unbound	11:46:05	6
3109044	99	29	27,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	09:19:21	6
3109044	99	29	27,2	cyclictest	3366108	-21	kworker/u16:4+events_unbound	09:19:21	6
3109044	99	29	27,2	cyclictest	3353056	-21	kworker/u16:0+events_unbound	09:09:33	6
3109044	99	29	26,2	cyclictest	3400723	-21	kworker/u16:6+events_unbound	09:45:22	6
3109044	99	28	26,2	cyclictest	3822744	-21	kworker/u16:3+events_unbound	12:28:41	6
3109044	99	28	26,2	cyclictest	3484630	-21	kworker/u16:2+events_unbound	10:01:57	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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