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 Jun 30, 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
3826565	2	67	0,1	sleep7	3826566	-21	latency_hist	07:39:07	7
3764509	99	58	53,4	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	09:24:07	5
3764014	2	58	48,7	sleep4	0	-21	swapper/4	07:06:20	4
3764071	2	55	45,7	sleep5	0	-21	swapper/5	07:07:09	5
3763921	2	52	17,30	sleep7	0	-21	swapper/7	07:05:03	7
3764509	99	40	38,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:53:02	5
3764509	99	40	38,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	12:03:06	5
3764509	99	40	37,2	cyclictest	3865537	-21	kworker/u16:0+flush-8:0	08:44:07	5
3764509	99	39	37,2	cyclictest	4099636	-21	kworker/u16:0+events_unbound	09:51:11	5
3764513	99	37	34,2	cyclictest	4099636	-21	kworker/u16:0+flush-8:0	10:04:07	6
3764509	99	36	34,2	cyclictest	50475	-21	kworker/u16:0+events_unbound	10:46:02	5
3764507	99	35	32,2	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	10:34:36	4
3764185	2	35	24,8	sleep6	0	-21	swapper/6	07:08:47	6
3764513	99	34	32,2	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	09:29:22	6
3764509	99	34	33,1	cyclictest	3894368	-21	kworker/u16:1+events_unbound	09:26:10	5
3764509	99	34	32,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:31:03	5
3764507	99	34	32,2	cyclictest	4026449	-21	kworker/u16:0+events_unbound	09:35:11	4
3764513	99	33	31,2	cyclictest	4026449	-21	kworker/u16:0+flush-8:0	09:39:07	6
3764509	99	33	31,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	10:04:09	5
3764509	99	33	31,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:33:10	5
3764509	99	33	31,2	cyclictest	3982425	-21	kworker/u16:2+events_unbound	09:13:02	5
3764509	99	33	30,3	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	10:39:02	5
3764507	99	33	31,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:36:17	4
3764513	99	32	30,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	12:34:35	6
3764513	99	32	29,3	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	11:49:45	6
3764509	99	32	30,2	cyclictest	113459	-21	kworker/u16:2+events_unbound	11:21:10	5
3764507	99	32	30,2	cyclictest	87111	-21	kworker/u16:1+events_unbound	11:36:23	4
3764507	99	32	30,2	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	10:54:46	4
3764507	99	32	30,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:01:18	4
3764507	99	32	30,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:01:18	4
3764507	99	32	30,2	cyclictest	113459	-21	kworker/u16:2+events_unbound	11:22:17	4
3764507	99	32	29,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:49:11	4
3764507	99	31	29,2	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	09:15:49	4
3764507	99	31	29,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	11:51:22	4
3764515	99	30	28,1	cyclictest	0	-21	swapper/7	12:04:30	7
3764509	99	30	28,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:17:30	5
3764509	99	30	28,2	cyclictest	4059859	-21	kworker/u16:2+events_unbound	09:45:11	5
3764509	99	30	28,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:58:18	5
3764509	99	30	28,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:33:06	5
3764509	99	30	28,2	cyclictest	138557	-21	kworker/u16:4+events_unbound	11:31:10	5
3764507	99	30	28,2	cyclictest	50475	-21	kworker/u16:0+flush-8:0	11:04:49	4
3764507	99	30	27,2	cyclictest	211881	-21	kworker/u16:5+flush-8:0	12:09:17	4
3764515	99	29	25,3	cyclictest	77378	-21	latency_hist	10:59:06	7
3764509	99	29	27,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:27:31	5
3764509	99	29	27,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:27:31	5
3764509	99	29	27,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:06:58	5
3764509	99	29	27,2	cyclictest	16256	-21	kworker/u16:4+events_unbound	10:51:18	5
3764507	99	29	27,2	cyclictest	4172921	-21	kworker/u16:2+events_unbound	10:39:11	4
3764507	99	29	27,2	cyclictest	3855686	-21	kworker/u16:1+flush-8:0	08:04:03	4
3764507	99	29	27,2	cyclictest	211881	-21	kworker/u16:5+events_unbound	12:04:20	4
3764507	99	29	26,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	09:09:18	4
3764509	99	28	26,2	cyclictest	87111	-21	kworker/u16:1+events_unbound	10:59:50	5
3764509	99	28	26,2	cyclictest	87111	-21	kworker/u16:1+events_unbound	10:59:50	5
3764509	99	28	26,2	cyclictest	50475	-21	kworker/u16:0+events_unbound	11:11:18	5
3764509	99	28	26,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	10:00:47	5
3764509	99	28	26,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:42:35	5
3764509	99	28	26,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:28:42	5
3764509	99	28	26,2	cyclictest	3735218	-21	kworker/u16:0+flush-8:0	07:29:34	5
3764509	99	28	26,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	12:15:05	5
3764509	99	28	26,2	cyclictest	138557	-21	kworker/u16:4+events_unbound	11:48:46	5
3764509	99	28	26,2	cyclictest	138557	-21	kworker/u16:4+events_unbound	11:48:46	5
3764507	99	28	26,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:18:21	4
3764507	99	28	26,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:59:10	4
3764507	99	28	26,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:26:18	4
3764507	99	28	25,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:29:10	4
3764515	99	27	22,4	cyclictest	4099603	-21	perf	09:49:07	7
3764509	99	27	25,2	cyclictest	87111	-21	kworker/u16:1+events_unbound	11:36:41	5
3764509	99	27	25,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:54:38	5
3764509	99	27	25,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	12:21:42	5
3764509	99	27	25,2	cyclictest	113459	-21	kworker/u16:2+flush-8:0	11:14:51	5
3764507	99	27	25,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:48:07	4
3764507	99	27	25,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	12:21:22	4
3764507	99	27	25,2	cyclictest	197200	-21	kworker/u16:0+events_unbound	11:56:02	4
4142193	2	26	0,1	sleep6	0	-21	swapper/6	10:04:26	6
3764515	99	26	25,0	cyclictest	0	-21	swapper/7	10:53:00	7
3764515	99	26	25,0	cyclictest	0	-21	swapper/7	10:25:13	7
3764515	99	26	21,4	cyclictest	3952868	-21	latency_hist	08:44:08	7
3764509	99	26	25,1	cyclictest	197200	-21	kworker/u16:0+events_unbound	12:36:11	5
3764509	99	26	24,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:11:03	5
3764509	99	26	23,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:41:18	5
3764507	99	26	24,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:53:43	4
3764507	99	26	24,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:30:31	4
3764507	99	26	24,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	11:17:14	4
3764515	99	25	24,0	cyclictest	0	-21	swapper/7	07:46:30	7
3764513	99	25	23,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:49:31	6
3764509	99	25	23,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:24:10	5
3764509	99	25	23,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:21:17	5
3764509	99	25	23,2	cyclictest	4148491	-21	kworker/u16:1+events_unbound	10:21:17	5
3764507	99	25	23,2	cyclictest	87111	-21	kworker/u16:1+events_unbound	11:26:31	4
3764507	99	25	23,2	cyclictest	4172921	-21	kworker/u16:2+events_unbound	10:32:15	4
3764507	99	25	23,2	cyclictest	4075069	-21	kworker/u16:5+events_unbound	09:40:30	4
3764507	99	25	23,2	cyclictest	4001589	-21	kworker/u16:3+flush-8:0	11:59:54	4
3764507	99	25	23,2	cyclictest	4001589	-21	kworker/u16:3+events_unbound	10:07:18	4
3764515	99	24	19,4	cyclictest	4111821	-21	latency_hist	09:54:07	7
3764515	99	24	0,22	cyclictest	321758	-21	latency_hist	12:39:07	7
3764509	99	24	23,1	cyclictest	50475	-21	kworker/u16:0+events_unbound	11:05:46	5
3764509	99	24	22,2	cyclictest	4027349	-21	kworker/u16:4+events_unbound	09:57:59	5
3764509	99	24	22,2	cyclictest	4026449	-21	kworker/u16:0+events_unbound	09:34:58	5
3764509	99	24	22,2	cyclictest	3982425	-21	kworker/u16:2+events_unbound	09:16:14	5
3764509	99	24	22,2	cyclictest	3865537	-21	kworker/u16:0+events_unbound	08:09:02	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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