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 14, 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
2289157	2	163	0,3	sleep4	0	-21	swapper/4	07:01:07	4
2292491	99	51	49,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:01:08	6
2292021	2	46	36,7	sleep6	0	-21	swapper/6	07:03:10	6
2292495	99	45	40,4	cyclictest	3018293	-21	latency_hist	12:30:41	7
2292491	99	45	43,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:29:24	6
2292486	99	45	43,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	12:34:56	5
2292486	99	45	43,2	cyclictest	2728074	-21	kworker/u16:6+flush-8:0	11:56:12	5
2292486	99	44	42,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:32:52	5
2292491	99	43	41,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	12:09:24	6
2292491	99	42	40,2	cyclictest	2838136	-21	kworker/u16:1+events_unbound	11:32:24	6
2292491	99	42	40,2	cyclictest	2799473	-21	kworker/u16:4+events_unbound	11:12:24	6
2292491	99	42	40,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	09:55:28	6
2292486	99	42	40,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:17:48	5
2292486	99	42	40,2	cyclictest	2727906	-21	kworker/u16:1+events_unbound	10:28:12	5
2283088	2	42	3,33	sleep7	0	-21	swapper/7	07:00:55	7
2292491	99	41	39,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:54:55	6
2292491	99	41	39,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	10:39:52	6
2291953	2	41	31,7	sleep5	0	-21	swapper/5	07:02:13	5
2292491	99	40	38,2	cyclictest	2645691	-21	kworker/u16:2+events_unbound	10:24:53	6
2292491	99	40	38,2	cyclictest	2600057	-21	kworker/u16:1+events_unbound	09:39:01	6
2292491	99	40	38,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	10:16:52	6
2292491	99	40	38,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	10:16:52	6
2292486	99	40	38,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	12:24:41	5
2292486	99	40	38,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:50:08	5
2292486	99	40	37,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:55:44	5
2292486	99	40	37,2	cyclictest	2439306	-21	kworker/u16:2+flush-8:0	09:25:52	5
2292481	99	40	36,3	cyclictest	2229311	-21	kworker/u16:0+flush-8:0	08:46:08	4
2292491	99	39	37,2	cyclictest	2967971	-21	kworker/u16:2+events_unbound	12:13:56	6
2292491	99	39	37,2	cyclictest	2886197	-21	kworker/u16:0+events_unbound	11:38:12	6
2292491	99	39	37,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:02:28	6
2292491	99	39	37,2	cyclictest	2645691	-21	kworker/u16:2+events_unbound	10:34:53	6
2292491	99	39	37,2	cyclictest	2525450	-21	kworker/u16:0+flush-8:0	09:10:42	6
2292486	99	39	37,2	cyclictest	2967971	-21	kworker/u16:2+events_unbound	12:27:56	5
2292486	99	39	37,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:42:07	5
2292486	99	39	37,2	cyclictest	2755021	-21	kworker/u16:1+events_unbound	10:42:28	5
2292486	99	39	37,2	cyclictest	2514833	-21	kworker/u16:3+flush-8:0	09:41:07	5
2292491	99	38	36,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:42:44	6
2292491	99	38	36,2	cyclictest	2645691	-21	kworker/u16:2+events_unbound	10:10:33	6
2292486	99	38	36,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	11:47:56	5
2292486	99	38	36,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:12:24	5
2292486	99	38	36,2	cyclictest	2600057	-21	kworker/u16:1+events_unbound	09:53:17	5
2292486	99	38	36,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	10:04:08	5
2292491	99	37	35,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	11:58:41	6
2292491	99	37	35,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	11:48:16	6
2292491	99	37	35,2	cyclictest	2755021	-21	kworker/u16:1+events_unbound	10:44:49	6
2292491	99	37	35,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:04:17	6
2292491	99	37	35,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	10:59:23	6
2292491	99	37	35,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:22:56	6
2292486	99	37	35,2	cyclictest	2774747	-21	kworker/u16:2+flush-8:0	10:46:56	5
2292486	99	37	35,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:18:24	5
2292486	99	37	35,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	10:07:08	5
2292486	99	37	35,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:20:41	5
2292495	99	36	34,1	cyclictest	2791108	-21	ssh	10:55:57	7
2292491	99	36	35,1	cyclictest	2439306	-21	kworker/u16:2+events_unbound	09:28:48	6
2292491	99	36	34,2	cyclictest	2838136	-21	kworker/u16:1+events_unbound	11:19:09	6
2292491	99	36	34,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:29:24	6
2292491	99	36	34,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:21:28	6
2292491	99	36	34,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	10:46:33	6
2292491	99	36	34,2	cyclictest	2728074	-21	kworker/u16:6+flush-8:0	12:21:20	6
2292491	99	36	34,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	10:14:20	6
2292486	99	36	34,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:25:12	5
2292486	99	36	34,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:02:32	5
2292486	99	36	34,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	10:53:56	5
2292486	99	36	34,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:13:13	5
2292486	99	36	34,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	09:34:08	5
2292486	99	36	34,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	09:13:33	5
2292486	99	36	34,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:24:57	5
2292491	99	35	33,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:19:50	6
2292486	99	35	33,2	cyclictest	2838136	-21	kworker/u16:1+events_unbound	11:27:21	5
2292486	99	35	33,2	cyclictest	2799473	-21	kworker/u16:4+events_unbound	11:13:44	5
2292486	99	35	33,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:39:28	5
2292486	99	35	33,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	11:35:40	5
2292486	99	35	33,2	cyclictest	2774747	-21	kworker/u16:2+events_unbound	10:56:17	5
2292486	99	35	33,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:09:03	5
2292486	99	35	33,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:07:29	5
2292486	99	35	33,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:07:29	5
2292486	99	35	33,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	10:40:13	5
2292486	99	35	33,2	cyclictest	2645691	-21	kworker/u16:2+events_unbound	10:24:28	5
2292495	99	34	32,1	cyclictest	2887402	-21	ssh	11:35:57	7
2292491	99	34	32,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	12:35:24	6
2292491	99	34	32,2	cyclictest	2755021	-21	kworker/u16:1+events_unbound	10:55:07	6
2292491	99	34	32,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:08:08	6
2292491	99	34	32,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	11:08:08	6
2292491	99	34	32,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	09:48:24	6
2292491	99	34	32,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	09:43:54	6
2292486	99	34	32,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:39:21	5
2292481	99	34	31,2	cyclictest	2600057	-21	kworker/u16:1+flush-8:0	09:36:08	4
2292495	99	33	32,0	cyclictest	0	-21	swapper/7	07:40:55	7
2292495	99	33	28,4	cyclictest	2789789	-21	latency_hist	10:55:41	7
2292491	99	33	31,2	cyclictest	2728074	-21	kworker/u16:6+events_unbound	12:17:05	6
2292491	99	33	31,2	cyclictest	2514833	-21	kworker/u16:3+events_unbound	09:12:17	6
2292491	99	33	31,2	cyclictest	2449242	-21	kworker/u16:1+flush-8:0	08:56:04	6
2292491	99	33	31,2	cyclictest	2411221	-21	kworker/u16:3+events_unbound	08:15:42	6
2292486	99	33	31,2	cyclictest	2514833	-21	kworker/u16:3+flush-8:0	09:06:16	5
2292481	99	33	30,2	cyclictest	2728074	-21	kworker/u16:6+flush-8:0	11:56:00	4
2292486	99	32	30,2	cyclictest	2910291	-21	kworker/u16:1+events_unbound	11:52:28	5
2292481	99	32	28,3	cyclictest	2728074	-21	kworker/u16:6+events_unbound	10:30:56	4
2292491	99	31	29,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:28:40	6
2292491	99	31	29,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:00:21	6
2292486	99	31	29,2	cyclictest	2525450	-21	kworker/u16:0+events_unbound	10:20:39	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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