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 Mon Feb 16, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2171907	2	68	42,8	sleep4	0	-21	swapper/4	19:03:56	4
2831193	2	66	0,1	sleep5	0	-21	swapper/5	00:00:54	5
2171859	2	58	48,7	sleep5	0	-21	swapper/5	19:03:17	5
2172326	99	54	52,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:25:53	6
2172325	99	51	49,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:01:04	5
2172325	99	48	46,2	cyclictest	2668641	-21	kworker/u16:3+flush-8:0	23:21:05	5
2172325	99	48	46,2	cyclictest	2338858	-21	kworker/u16:1+flush-8:0	21:01:03	5
2172331	99	47	43,2	cyclictest	2347034	-21	ntpq	20:31:00	7
2172317	99	47	45,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	00:21:05	4
2172317	99	47	44,2	cyclictest	2549902	-21	kworker/u16:0+events_unbound	22:40:50	4
2172326	99	46	44,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	00:16:06	6
2172326	99	44	41,2	cyclictest	2252475	-21	kworker/u16:2+events_unbound	20:51:02	6
2172325	99	44	42,2	cyclictest	2451059	-21	kworker/u16:2+events_unbound	21:31:00	5
2171994	2	44	3,37	sleep7	0	-21	swapper/7	19:05:11	7
2172325	99	43	41,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	22:43:46	5
2172325	99	43	40,2	cyclictest	2813702	-21	kworker/u16:3+events_unbound	00:10:50	5
2172317	99	43	41,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:12:26	4
2171768	2	43	33,7	sleep6	0	-21	swapper/6	19:01:57	6
2172331	99	42	39,2	cyclictest	2790317	-21	ssh	23:42:37	7
2172331	99	42	0,40	cyclictest	2573054	-21	ssh	22:13:13	7
2172326	99	42	40,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:36:01	6
2172325	99	42	41,1	cyclictest	2634753	-21	kworker/u16:1+events_unbound	22:57:29	5
2172317	99	42	40,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	22:50:54	4
2172317	99	42	40,2	cyclictest	2402694	-21	kworker/u16:0+flush-8:0	21:10:36	4
2172317	99	42	40,2	cyclictest	2402694	-21	kworker/u16:0+flush-8:0	21:10:36	4
2172326	99	41	38,2	cyclictest	2719156	-21	kworker/u16:2+flush-8:0	23:15:35	6
2172326	99	41	38,2	cyclictest	2719156	-21	kworker/u16:2+flush-8:0	23:15:35	6
2172325	99	41	39,2	cyclictest	2668641	-21	kworker/u16:3+events_unbound	23:08:57	5
2172325	99	41	39,2	cyclictest	2367609	-21	kworker/u16:4+events_unbound	22:34:21	5
2172325	99	41	39,2	cyclictest	2367609	-21	kworker/u16:4+events_unbound	22:34:21	5
2172325	99	41	38,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	00:20:52	5
2172326	99	40	38,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	00:10:38	6
2172326	99	40	38,2	cyclictest	2549902	-21	kworker/u16:0+events_unbound	22:20:58	6
2172325	99	40	38,2	cyclictest	2862131	-21	kworker/u16:1+events_unbound	00:19:02	5
2172325	99	40	38,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	00:06:45	5
2172325	99	40	38,2	cyclictest	2634753	-21	kworker/u16:1+flush-8:0	23:41:06	5
2172325	99	40	38,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:18:37	5
2172325	99	40	38,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:05:33	5
2172325	99	40	38,2	cyclictest	2524853	-21	kworker/u16:1+events_unbound	21:58:10	5
2172331	99	39	38,0	cyclictest	0	-21	swapper/7	23:38:25	7
2172331	99	39	38,0	cyclictest	0	-21	swapper/7	23:07:25	7
2172325	99	39	38,1	cyclictest	2367609	-21	kworker/u16:4+events_unbound	22:28:57	5
2172325	99	39	37,2	cyclictest	2862131	-21	kworker/u16:1+events_unbound	00:34:29	5
2172325	99	39	37,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:34:01	5
2172325	99	39	37,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:11:04	5
2172325	99	39	37,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:11:04	5
2172325	99	39	36,2	cyclictest	2451059	-21	kworker/u16:2+flush-8:0	21:21:30	5
2172331	99	38	36,1	cyclictest	2755280	-21	ssh	23:29:57	7
2172331	99	38	33,4	cyclictest	2598539	-21	latency_hist	22:25:36	7
2172325	99	38	36,2	cyclictest	2862131	-21	kworker/u16:1+events_unbound	00:26:40	5
2172325	99	38	36,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:47:01	5
2172325	99	38	36,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:47:01	5
2172325	99	38	36,2	cyclictest	2668641	-21	kworker/u16:3+events_unbound	22:53:05	5
2172325	99	38	36,2	cyclictest	2634753	-21	kworker/u16:1+flush-8:0	23:51:04	5
2172325	99	38	36,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:22:10	5
2172325	99	38	36,2	cyclictest	2402694	-21	kworker/u16:0+events_unbound	21:12:01	5
2172325	99	38	36,2	cyclictest	2367609	-21	kworker/u16:4+events_unbound	22:18:45	5
2172325	99	38	36,2	cyclictest	2367609	-21	kworker/u16:4+events_unbound	22:06:46	5
2172325	99	38	33,2	cyclictest	2789683	-21	kworker/u16:2+events_unbound	23:55:59	5
2172317	99	38	36,2	cyclictest	2682198	-21	kworker/u16:2+events_unbound	23:00:50	4
2172331	99	37	0,35	cyclictest	2801354	-21	timerwakeupswit	23:46:08	7
2172331	99	37	0,35	cyclictest	2801354	-21	timerwakeupswit	23:46:08	7
2172325	99	37	35,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:30:01	5
2172325	99	37	35,2	cyclictest	2451059	-21	kworker/u16:2+events_unbound	21:28:30	5
2172317	99	37	34,2	cyclictest	2598958	-21	kworker/u16:2+events_unbound	22:30:50	4
2172317	99	37	34,2	cyclictest	2598958	-21	kworker/u16:2+events_unbound	22:30:50	4
2172331	99	36	34,1	cyclictest	2651907	-21	ssh	22:45:56	7
2172331	99	36	31,4	cyclictest	2719377	-21	latency_hist	23:15:36	7
2172331	99	36	31,4	cyclictest	2719377	-21	latency_hist	23:15:36	7
2172326	99	36	34,2	cyclictest	2862131	-21	kworker/u16:1+events_unbound	00:31:09	6
2172326	99	36	34,2	cyclictest	2549902	-21	kworker/u16:0+events_unbound	22:30:05	6
2172326	99	36	33,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:20:38	6
2172325	99	36	34,2	cyclictest	2549902	-21	kworker/u16:0+events_unbound	22:11:08	5
2172325	99	36	34,2	cyclictest	2338858	-21	kworker/u16:1+events_unbound	20:36:07	5
2172317	99	36	33,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:35:51	4
2172331	99	35	34,0	cyclictest	0	-21	swapper/7	21:17:49	7
2172326	99	35	34,1	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:45:57	6
2172326	99	35	34,1	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:45:57	6
2172326	99	35	33,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:30:50	6
2172326	99	35	33,2	cyclictest	2719156	-21	kworker/u16:2+flush-8:0	23:16:05	6
2172326	99	35	33,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:35:55	6
2172326	99	35	32,2	cyclictest	2598958	-21	kworker/u16:2+events_unbound	22:40:46	6
2172325	99	35	33,2	cyclictest	2634753	-21	kworker/u16:1+events_unbound	23:38:17	5
2172325	99	35	33,2	cyclictest	2549902	-21	kworker/u16:0+events_unbound	22:47:05	5
2172325	99	35	33,2	cyclictest	2451059	-21	kworker/u16:2+events_unbound	21:40:21	5
2172325	99	35	33,2	cyclictest	2278255	-21	kworker/u16:0+flush-8:0	20:26:06	5
2172317	99	35	33,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:16:42	4
2172331	99	34	33,0	cyclictest	0	-21	swapper/7	23:50:48	7
2172326	99	34	32,2	cyclictest	2402694	-21	kworker/u16:0+events_unbound	21:01:00	6
2172325	99	34	32,2	cyclictest	2535940	-21	kworker/u16:5+events_unbound	22:38:18	5
2172325	99	34	32,2	cyclictest	2338858	-21	kworker/u16:1+events_unbound	21:09:30	5
2172325	99	34	32,2	cyclictest	2338858	-21	kworker/u16:1+events_unbound	21:09:30	5
2172325	99	34	29,2	cyclictest	2502233	-21	kworker/u16:3+events_unbound	21:53:13	5
2172317	99	34	31,2	cyclictest	2705360	-21	kworker/u16:0+flush-8:0	23:10:41	4
2172317	99	34	31,2	cyclictest	2705360	-21	kworker/u16:0+flush-8:0	23:10:41	4
2172331	99	33	33,0	cyclictest	0	-21	swapper/7	21:48:45	7
2172331	99	33	30,2	cyclictest	2337523	-21	ntpq	20:26:01	7
2172331	99	33	29,3	cyclictest	2821687	-21	kthreadcore	23:55:57	7
2172326	99	33	31,2	cyclictest	2888922	-21	kworker/u16:3+flush-8:0	00:26:17	6
2172326	99	33	31,2	cyclictest	2731450	-21	kworker/u16:0+events_unbound	23:50:50	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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