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 Tue Feb 17, 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
2696202	2	99	0,1	sleep7	2696203	-21	sh	11:53:21	7
2371051	2	97	0,1	sleep7	2371049	-21	sh	09:38:48	7
2294721	2	58	0,0	sleep6	0	-21	swapper/6	09:05:53	6
2054279	99	58	56,2	cyclictest	2468402	-21	kworker/u16:0+events_unbound	10:50:29	5
2053747	2	58	48,7	sleep6	0	-21	swapper/6	07:01:59	6
2053747	2	58	48,7	sleep6	0	-21	swapper/6	07:01:59	6
2054284	99	57	55,1	cyclictest	2287496	-21	diskmemload	12:15:57	7
2054284	99	57	55,1	cyclictest	2287496	-21	diskmemload	12:15:57	7
2053746	2	57	47,7	sleep5	0	-21	swapper/5	07:01:58	5
2053746	2	57	47,7	sleep5	0	-21	swapper/5	07:01:58	5
2054284	99	48	45,2	cyclictest	2525578	-21	ssh	10:40:56	7
6265	89	47	0,40	rtkit-daemon	0	-21	swapper/4	07:04:06	4
6265	89	47	0,40	rtkit-daemon	0	-21	swapper/4	07:04:06	4
2609242	2	47	0,0	sleep7	2609243	-21	tr	11:15:54	7
2054280	99	46	44,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	10:43:01	6
2054284	99	45	42,2	cyclictest	2085694	-21	ntp_states	07:15:58	7
2054280	99	45	43,2	cyclictest	2382279	-21	kworker/u16:1+flush-8:0	11:30:59	6
2054280	99	45	43,2	cyclictest	2382279	-21	kworker/u16:1+flush-8:0	11:30:59	6
2054280	99	44	42,2	cyclictest	2685758	-21	kworker/u16:0+events_unbound	12:01:02	6
2054279	99	44	40,3	cyclictest	2268713	-21	kworker/u16:1+flush-8:0	09:00:30	5
2054280	99	43	41,2	cyclictest	2589043	-21	kworker/u16:0+events_unbound	11:26:38	6
2054279	99	43	41,2	cyclictest	2143721	-21	kworker/u16:0+events_unbound	09:06:01	5
2054284	99	42	37,4	cyclictest	2552785	-21	latency_hist	10:55:30	7
2054284	99	42	0,40	cyclictest	2162310	-21	grep	07:55:58	7
2054280	99	42	40,2	cyclictest	2589043	-21	kworker/u16:0+events_unbound	11:16:14	6
2054280	99	42	39,2	cyclictest	2323724	-21	kworker/u16:4+flush-8:0	09:55:45	6
2054280	99	42	39,2	cyclictest	2258892	-21	kworker/u16:3+flush-8:0	09:21:01	6
2054280	99	41	39,2	cyclictest	2395443	-21	kworker/u16:2+events_unbound	10:05:18	6
2054279	99	41	38,2	cyclictest	2634137	-21	kworker/u16:2+flush-8:0	12:15:24	5
2054279	99	41	38,2	cyclictest	2634137	-21	kworker/u16:2+flush-8:0	12:15:24	5
2045643	2	41	3,31	sleep7	0	-21	swapper/7	07:00:47	7
2045643	2	41	3,31	sleep7	0	-21	swapper/7	07:00:47	7
2054284	99	40	39,0	cyclictest	0	-21	swapper/7	12:21:01	7
2054284	99	40	0,38	cyclictest	2571953	-21	kthreadcore	11:00:54	7
2054280	99	40	38,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	10:23:50	6
2054280	99	40	38,2	cyclictest	2258892	-21	kworker/u16:3+flush-8:0	09:26:00	6
2054280	99	40	38,2	cyclictest	2258892	-21	kworker/u16:3+events_unbound	09:30:56	6
2054280	99	40	38,2	cyclictest	2143721	-21	kworker/u16:0+events_unbound	08:46:01	6
2054279	99	40	37,2	cyclictest	2395443	-21	kworker/u16:2+flush-8:0	09:55:30	5
2054284	99	39	37,1	cyclictest	2287496	-21	diskmemload	10:12:34	7
2054280	99	39	37,2	cyclictest	2502320	-21	kworker/u16:5+events_unbound	11:05:14	6
2054280	99	39	37,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	11:00:01	6
2054280	99	39	37,2	cyclictest	2268713	-21	kworker/u16:1+events_unbound	09:14:18	6
2054279	99	39	37,2	cyclictest	1970867	-21	kworker/u16:0+events_unbound	07:30:45	5
2054284	99	38	37,0	cyclictest	0	-21	swapper/7	12:06:04	7
2054284	99	38	36,1	cyclictest	2591986	-21	kthreadcore	11:10:49	7
2054284	99	38	36,1	cyclictest	2287496	-21	diskmemload	12:28:45	7
2054280	99	38	36,2	cyclictest	2671019	-21	kworker/u16:1+events_unbound	11:53:14	6
2054280	99	38	36,2	cyclictest	2086653	-21	kworker/u16:1+events_unbound	07:46:01	6
2054280	99	38	35,2	cyclictest	2649854	-21	kworker/u16:3+flush-8:0	12:05:48	6
2054279	99	38	34,3	cyclictest	2212540	-21	kworker/u16:2+flush-8:0	08:30:49	5
2054284	99	37	32,3	cyclictest	2149939	-21	kthreadcore	07:50:51	7
2054284	99	37	0,36	cyclictest	2647989	-21	sh	11:33:09	7
2054284	99	37	0,36	cyclictest	2647989	-21	sh	11:33:09	7
2054280	99	37	35,2	cyclictest	2779499	-21	kworker/u16:0+events_unbound	12:30:18	6
2054280	99	37	35,2	cyclictest	2649854	-21	kworker/u16:3+events_unbound	12:12:14	6
2054280	99	37	35,2	cyclictest	2649854	-21	kworker/u16:3+events_unbound	12:12:14	6
2054280	99	37	35,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	10:29:38	6
2054280	99	37	35,2	cyclictest	2143721	-21	kworker/u16:0+events_unbound	09:15:57	6
2054280	99	37	34,2	cyclictest	2382279	-21	kworker/u16:1+flush-8:0	10:45:56	6
2054284	99	36	35,0	cyclictest	0	-21	swapper/7	12:31:00	7
2054284	99	36	34,1	cyclictest	2673282	-21	ssh	11:45:29	7
2054284	99	36	33,2	cyclictest	2489430	-21	ntpq	10:25:59	7
2054280	99	36	34,2	cyclictest	2649854	-21	kworker/u16:3+events_unbound	11:47:38	6
2054280	99	36	34,2	cyclictest	2649854	-21	kworker/u16:3+events_unbound	11:37:46	6
2054280	99	36	34,2	cyclictest	2649854	-21	kworker/u16:3+events_unbound	11:37:46	6
2054280	99	36	34,2	cyclictest	2589043	-21	kworker/u16:0+events_unbound	11:21:17	6
2054280	99	36	34,2	cyclictest	2502320	-21	kworker/u16:5+events_unbound	10:54:27	6
2054280	99	36	34,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	10:18:10	6
2054280	99	36	34,2	cyclictest	2086653	-21	kworker/u16:1+events_unbound	07:40:55	6
2054284	99	35	34,0	cyclictest	0	-21	swapper/7	09:22:18	7
2054284	99	35	0,34	cyclictest	2659524	-21	ssh	11:37:17	7
2054284	99	35	0,34	cyclictest	2659524	-21	ssh	11:37:17	7
2054280	99	35	33,2	cyclictest	2382279	-21	kworker/u16:1+events_unbound	09:50:07	6
2054280	99	35	33,2	cyclictest	2212540	-21	kworker/u16:2+events_unbound	08:27:41	6
2054279	99	35	33,2	cyclictest	2502320	-21	kworker/u16:5+events_unbound	10:56:01	5
2054279	99	35	33,2	cyclictest	2143721	-21	kworker/u16:0+flush-8:0	09:15:25	5
2054277	99	35	33,2	cyclictest	2212540	-21	kworker/u16:2+flush-8:0	08:40:56	4
2054284	99	34	33,0	cyclictest	0	-21	swapper/7	09:42:30	7
2054284	99	34	32,1	cyclictest	2698522	-21	grep	11:55:43	7
2054284	99	34	32,1	cyclictest	2287496	-21	diskmemload	10:57:25	7
2054280	99	34	32,2	cyclictest	2395443	-21	kworker/u16:2+events_unbound	10:30:56	6
2054280	99	34	32,2	cyclictest	1970867	-21	kworker/u16:0+flush-8:0	07:30:56	6
2054280	99	34	31,2	cyclictest	2143721	-21	kworker/u16:0+events_unbound	08:20:43	6
2054279	99	34	32,2	cyclictest	2634137	-21	kworker/u16:2+events_unbound	11:40:58	5
2054279	99	34	32,2	cyclictest	2502320	-21	kworker/u16:5+flush-8:0	11:00:58	5
2054279	99	34	32,2	cyclictest	2143721	-21	kworker/u16:0+events_unbound	09:15:44	5
2054279	99	34	31,2	cyclictest	2395443	-21	kworker/u16:2+flush-8:0	10:00:47	5
2054284	99	33	33,0	cyclictest	0	-21	swapper/7	12:15:16	7
2054284	99	33	33,0	cyclictest	0	-21	swapper/7	12:15:16	7
2054280	99	33	31,2	cyclictest	2685758	-21	kworker/u16:0+events_unbound	11:59:20	6
2054280	99	33	31,2	cyclictest	2323724	-21	kworker/u16:4+events_unbound	10:12:40	6
2054280	99	33	31,2	cyclictest	2258892	-21	kworker/u16:3+events_unbound	09:39:24	6
2054280	99	33	31,2	cyclictest	1970867	-21	kworker/u16:0+events_unbound	07:25:58	6
2054280	99	33	31,2	cyclictest	1970867	-21	kworker/u16:0+events_unbound	07:25:58	6
2054279	99	33	30,2	cyclictest	1970867	-21	kworker/u16:0+flush-8:0	07:25:56	5
2054279	99	33	30,2	cyclictest	1970867	-21	kworker/u16:0+flush-8:0	07:25:56	5
2054284	99	32	29,2	cyclictest	2431642	-21	ssh	10:04:21	7
2054284	99	32	29,2	cyclictest	2357935	-21	ssh	09:31:53	7
2054284	99	32	29,2	cyclictest	2287496	-21	diskmemload	09:53:05	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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