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 May 11, 2026 00:43:39)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2847416	2	102	0,0	sleep5	0	-21	swapper/5	22:53:47	5
2386963	2	98	0,1	sleep7	2386964	-21	grep	19:23:38	7
2348611	2	65	55,7	sleep4	0	-21	swapper/4	19:07:42	4
2348935	99	62	60,2	cyclictest	2573741	-21	kworker/u16:0+flush-8:0	21:08:45	4
2348935	99	62	59,2	cyclictest	2837855	-21	kworker/u16:2+flush-8:0	23:08:33	4
2348935	99	54	52,2	cyclictest	2684094	-21	kworker/u16:4+events_unbound	21:48:49	4
2348935	99	54	51,2	cyclictest	2999871	-21	kworker/u16:0+events_unbound	00:08:29	4
2348935	99	53	51,2	cyclictest	2763100	-21	kworker/u16:0+events_unbound	22:43:30	4
2348936	99	50	47,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	22:58:33	5
2348935	99	49	47,2	cyclictest	2684094	-21	kworker/u16:4+flush-8:0	22:13:46	4
2348935	99	49	46,2	cyclictest	2506542	-21	kworker/u16:0+events_unbound	20:38:31	4
2348935	99	48	45,2	cyclictest	2381641	-21	kworker/u16:2+events_unbound	19:48:31	4
2348936	99	47	45,2	cyclictest	2922804	-21	kworker/u16:5+flush-8:0	23:33:49	5
2348935	99	47	45,2	cyclictest	2448765	-21	kworker/u16:1+events_unbound	20:28:31	4
2348935	99	47	44,2	cyclictest	2684094	-21	kworker/u16:4+flush-8:0	22:18:33	4
2348935	99	47	44,2	cyclictest	2643460	-21	kworker/u16:0+flush-8:0	21:43:31	4
2348935	99	47	44,2	cyclictest	2643460	-21	kworker/u16:0+flush-8:0	21:43:31	4
2348935	99	47	44,2	cyclictest	2448765	-21	kworker/u16:1+events_unbound	20:48:31	4
2348942	99	46	43,1	cyclictest	2544213	-21	/usr/sbin/munin	20:43:44	7
2348936	99	46	44,1	cyclictest	2837855	-21	kworker/u16:2+events_unbound	23:38:33	5
2348935	99	45	42,2	cyclictest	2999871	-21	kworker/u16:0+events_unbound	23:58:38	4
2348936	99	44	42,2	cyclictest	2684094	-21	kworker/u16:4+flush-8:0	22:03:46	5
2348935	99	44	42,2	cyclictest	2850425	-21	kworker/u16:1+events_unbound	23:03:30	4
2348935	99	44	42,2	cyclictest	2777778	-21	kworker/u16:1+events_unbound	22:48:48	4
2348935	99	44	42,2	cyclictest	2525582	-21	kworker/u16:3+flush-8:0	20:43:46	4
2348935	99	43	42,1	cyclictest	3042811	-21	kworker/u16:2+events_unbound	00:33:37	4
2348612	2	43	33,7	sleep5	0	-21	swapper/5	19:07:43	5
2348935	99	42	40,2	cyclictest	3068193	-21	kworker/u16:3+flush-8:0	00:28:32	4
2348935	99	42	40,2	cyclictest	3068193	-21	kworker/u16:3+flush-8:0	00:28:32	4
2348935	99	41	39,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	22:58:31	4
2348935	99	41	38,2	cyclictest	2400769	-21	kworker/u16:4+flush-8:0	19:38:42	4
2348416	2	41	5,31	sleep7	0	-21	swapper/7	19:04:56	7
2348942	99	40	35,4	cyclictest	2632045	-21	latency_hist	21:28:16	7
2348935	99	40	38,2	cyclictest	2716977	-21	kworker/u16:3+events_unbound	22:08:11	4
2348935	99	40	38,2	cyclictest	2598947	-21	kworker/u16:2+events_unbound	22:25:17	4
2348935	99	40	37,2	cyclictest	2981917	-21	kworker/u16:2+events_unbound	00:03:28	4
2348936	99	39	36,2	cyclictest	3042811	-21	kworker/u16:2+flush-8:0	00:23:49	5
2348935	99	39	37,2	cyclictest	2850425	-21	kworker/u16:1+events_unbound	23:53:41	4
2348935	99	39	37,2	cyclictest	2763100	-21	kworker/u16:0+events_unbound	22:33:01	4
2348935	99	39	37,2	cyclictest	2558056	-21	kworker/u16:2+flush-8:0	21:03:45	4
2348935	99	39	37,2	cyclictest	2558056	-21	kworker/u16:2+flush-8:0	21:03:45	4
2348935	99	39	36,2	cyclictest	2968281	-21	kworker/u16:3+flush-8:0	23:48:37	4
2348935	99	39	36,2	cyclictest	2968281	-21	kworker/u16:3+flush-8:0	23:48:37	4
2348935	99	39	36,2	cyclictest	2763100	-21	kworker/u16:0+flush-8:0	22:53:32	4
2348936	99	38	36,2	cyclictest	3042811	-21	kworker/u16:2+events_unbound	00:18:29	5
2348936	99	38	36,2	cyclictest	2598947	-21	kworker/u16:2+flush-8:0	21:58:45	5
2348935	99	38	36,2	cyclictest	2763100	-21	kworker/u16:0+events_unbound	22:40:22	4
2348935	99	38	35,2	cyclictest	2643460	-21	kworker/u16:0+events_unbound	21:53:50	4
2348936	99	37	35,2	cyclictest	2999871	-21	kworker/u16:0+events_unbound	00:08:34	5
2348936	99	37	35,1	cyclictest	2643460	-21	kworker/u16:0+events_unbound	21:48:35	5
2348935	99	37	35,2	cyclictest	2850425	-21	kworker/u16:1+events_unbound	23:16:06	4
2348935	99	37	35,2	cyclictest	2448765	-21	kworker/u16:1+flush-8:0	20:13:45	4
2348935	99	36	34,2	cyclictest	2983424	-21	kworker/u16:4+flush-8:0	00:23:53	4
2348935	99	36	34,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	23:18:47	4
2348935	99	36	34,2	cyclictest	2656221	-21	kworker/u16:3+events_unbound	21:39:26	4
2348935	99	36	34,2	cyclictest	2598947	-21	kworker/u16:2+flush-8:0	21:58:31	4
2348936	99	35	32,2	cyclictest	2348705	-21	kworker/u16:1+events_unbound	19:28:30	5
2348935	99	35	33,2	cyclictest	2922804	-21	kworker/u16:5+events_unbound	23:33:43	4
2348935	99	35	33,2	cyclictest	2777778	-21	kworker/u16:1+events_unbound	22:36:02	4
2348936	99	34	32,2	cyclictest	2656221	-21	kworker/u16:3+events_unbound	21:43:30	5
2348936	99	34	32,2	cyclictest	2656221	-21	kworker/u16:3+events_unbound	21:43:30	5
2348935	99	34	33,1	cyclictest	2714667	-21	kworker/u16:1+events_unbound	22:10:30	4
2348935	99	34	32,2	cyclictest	2631124	-21	kworker/u16:1+flush-8:0	21:31:37	4
2348935	99	34	32,2	cyclictest	2598947	-21	kworker/u16:2+events_unbound	21:25:10	4
2348935	99	34	31,2	cyclictest	2348705	-21	kworker/u16:1+flush-8:0	19:28:29	4
2348935	99	33	31,2	cyclictest	2983424	-21	kworker/u16:4+flush-8:0	00:19:33	4
2348935	99	33	31,2	cyclictest	2983424	-21	kworker/u16:4+flush-8:0	00:17:09	4
2348935	99	33	31,2	cyclictest	2837855	-21	kworker/u16:2+events_unbound	23:29:37	4
2348935	99	33	31,2	cyclictest	2598947	-21	kworker/u16:2+flush-8:0	21:36:34	4
2348935	99	33	30,2	cyclictest	2448765	-21	kworker/u16:1+flush-8:0	20:03:31	4
2348936	99	32	30,2	cyclictest	3042811	-21	kworker/u16:2+events_unbound	00:28:30	5
2348936	99	32	30,2	cyclictest	3042811	-21	kworker/u16:2+events_unbound	00:28:30	5
2348936	99	32	30,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	23:18:37	5
2348936	99	32	30,2	cyclictest	2400769	-21	kworker/u16:4+flush-8:0	19:33:46	5
2348936	99	32	30,2	cyclictest	2400769	-21	kworker/u16:4+flush-8:0	19:33:46	5
2348936	99	32	29,2	cyclictest	2789882	-21	kworker/u16:3+events_unbound	22:38:29	5
2348936	99	32	28,3	cyclictest	2763100	-21	kworker/u16:0+flush-8:0	23:28:31	5
2348935	99	32	30,2	cyclictest	2448765	-21	kworker/u16:1+flush-8:0	20:23:31	4
2348935	99	32	29,3	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	23:43:48	4
2348942	99	31	30,0	cyclictest	0	-21	swapper/7	20:35:53	7
2348936	99	31	29,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	23:43:34	5
2348936	99	31	29,2	cyclictest	2583544	-21	kworker/u16:1+flush-8:0	21:18:44	5
2348936	99	31	28,3	cyclictest	2981917	-21	kworker/u16:2+events_unbound	00:03:45	5
2348935	99	31	29,2	cyclictest	2573741	-21	kworker/u16:0+flush-8:0	21:20:42	4
2348935	99	31	29,2	cyclictest	2525582	-21	kworker/u16:3+events_unbound	21:13:40	4
2348942	99	30	29,0	cyclictest	0	-21	swapper/7	20:42:10	7
2348936	99	30	28,2	cyclictest	2983424	-21	kworker/u16:4+events_unbound	23:59:17	5
2348936	99	30	28,2	cyclictest	2598947	-21	kworker/u16:2+flush-8:0	21:33:45	5
2348936	99	30	28,2	cyclictest	2525582	-21	kworker/u16:3+flush-8:0	21:13:44	5
2348356	2	30	19,8	sleep6	0	-21	swapper/6	19:04:07	6
2348942	99	29	28,0	cyclictest	0	-21	swapper/7	23:55:48	7
2348942	99	29	28,0	cyclictest	0	-21	swapper/7	20:27:46	7
2348942	99	29	27,1	cyclictest	0	-21	swapper/7	23:50:28	7
2348942	99	29	27,1	cyclictest	0	-21	swapper/7	23:50:28	7
2348936	99	29	26,3	cyclictest	2789882	-21	kworker/u16:3+flush-8:0	22:43:32	5
2348935	99	29	27,2	cyclictest	2850425	-21	kworker/u16:1+flush-8:0	23:26:18	4
2348935	99	29	27,2	cyclictest	2400769	-21	kworker/u16:4+flush-8:0	19:33:31	4
2348935	99	29	27,2	cyclictest	2400769	-21	kworker/u16:4+flush-8:0	19:33:31	4
2348935	99	29	27,2	cyclictest	2300526	-21	kworker/u16:3+events_unbound	19:13:29	4
2348942	99	28	27,0	cyclictest	0	-21	swapper/7	21:29:59	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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