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 Thu Mar 12, 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
3296935	2	66	0,1	sleep7	3296937	-21	ssh	11:53:39	7
2655427	99	55	54,0	cyclictest	0	-21	swapper/7	12:04:24	7
2655410	99	51	46,2	cyclictest	3062258	-21	kworker/u16:3+events_unbound	10:21:56	4
2655091	2	51	41,7	sleep5	0	-21	swapper/5	07:03:29	5
2655427	99	50	45,4	cyclictest	3345109	-21	latency_hist	12:13:57	7
2655083	2	49	39,7	sleep6	0	-21	swapper/6	07:03:22	6
2655410	99	45	42,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	11:31:27	4
2655427	99	44	43,0	cyclictest	0	-21	swapper/7	09:11:04	7
2655427	99	44	38,4	cyclictest	3152843	-21	latency_hist	10:53:58	7
2655410	99	43	41,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	10:06:16	4
2655427	99	42	41,0	cyclictest	0	-21	swapper/7	10:01:35	7
2655410	99	42	40,2	cyclictest	3142267	-21	kworker/u16:6+events_unbound	11:40:28	4
2655410	99	42	40,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	10:32:43	4
2655427	99	41	40,0	cyclictest	0	-21	swapper/7	10:37:52	7
2655410	99	41	39,2	cyclictest	3298844	-21	kworker/u16:0+events_unbound	12:00:40	4
2655410	99	41	39,2	cyclictest	3262690	-21	kworker/u16:0+events_unbound	11:46:08	4
2655410	99	41	39,2	cyclictest	3142267	-21	kworker/u16:6+events_unbound	11:24:48	4
2655410	99	41	39,2	cyclictest	2879239	-21	kworker/u16:2+events_unbound	10:11:48	4
2646023	2	41	31,7	sleep4	0	-21	swapper/4	06:59:03	4
2655427	99	40	39,0	cyclictest	0	-21	swapper/7	09:15:53	7
2655410	99	40	38,2	cyclictest	3298844	-21	kworker/u16:0+events_unbound	12:30:08	4
2655410	99	40	38,2	cyclictest	3298844	-21	kworker/u16:0+events_unbound	12:15:35	4
2655410	99	40	38,2	cyclictest	3298844	-21	kworker/u16:0+events_unbound	11:56:28	4
2655410	99	40	38,2	cyclictest	3285089	-21	kworker/u16:2+events_unbound	12:25:27	4
2655410	99	40	38,2	cyclictest	3142267	-21	kworker/u16:6+events_unbound	11:15:31	4
2655410	99	40	38,2	cyclictest	3128873	-21	kworker/u16:5+events_unbound	12:10:28	4
2655410	99	40	38,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	10:36:57	4
2655410	99	40	38,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	10:27:15	4
2655410	99	40	38,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	10:02:51	4
2655410	99	40	38,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	09:58:39	4
2655410	99	40	38,2	cyclictest	2679986	-21	kworker/u16:3+flush-8:0	07:23:58	4
2655410	99	40	38,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:08:04	4
2654857	2	40	6,30	sleep7	0	-21	swapper/7	07:00:10	7
2655427	99	39	0,38	cyclictest	3357139	-21	latency_hist	12:18:58	7
2655414	99	39	36,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:59:12	5
2655410	99	39	37,2	cyclictest	3285089	-21	kworker/u16:2+events_unbound	12:21:48	4
2655410	99	39	37,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	09:50:40	4
2655410	99	39	37,2	cyclictest	2879239	-21	kworker/u16:2+events_unbound	09:13:44	4
2655410	99	39	37,2	cyclictest	2812122	-21	kworker/u16:3+events_unbound	09:25:20	4
2655427	99	38	37,0	cyclictest	0	-21	swapper/7	09:42:37	7
2655410	99	38	36,2	cyclictest	3285089	-21	kworker/u16:2+events_unbound	12:05:48	4
2655410	99	38	36,2	cyclictest	3128873	-21	kworker/u16:5+events_unbound	11:22:35	4
2655410	99	38	36,2	cyclictest	3117214	-21	kworker/u16:2+flush-8:0	10:55:20	4
2655410	99	38	36,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	11:11:56	4
2655410	99	38	36,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	10:59:45	4
2655410	99	38	36,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	10:41:35	4
2655410	99	38	36,2	cyclictest	3062258	-21	kworker/u16:3+events_unbound	10:14:44	4
2655410	99	38	36,2	cyclictest	2879239	-21	kworker/u16:2+events_unbound	09:18:37	4
2655410	99	38	36,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:43:36	4
2655410	99	38	36,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:30:19	4
2655419	99	37	33,3	cyclictest	3298844	-21	kworker/u16:0+flush-8:0	11:54:15	6
2655410	99	37	35,2	cyclictest	3128873	-21	kworker/u16:5+events_unbound	11:50:53	4
2655410	99	37	35,2	cyclictest	3128873	-21	kworker/u16:5+events_unbound	11:36:20	4
2655410	99	37	35,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	10:47:23	4
2655427	99	36	35,0	cyclictest	0	-21	swapper/7	11:05:31	7
2655427	99	36	35,0	cyclictest	0	-21	swapper/7	10:41:27	7
2655427	99	36	35,0	cyclictest	0	-21	swapper/7	10:21:07	7
2655427	99	36	0,34	cyclictest	2745066	-21	latency_hist	07:48:59	7
2655414	99	35	32,2	cyclictest	3117214	-21	kworker/u16:2+flush-8:0	10:43:58	5
2655410	99	35	33,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	10:52:59	4
2655410	99	35	33,2	cyclictest	2812122	-21	kworker/u16:3+events_unbound	09:47:56	4
2655410	99	35	33,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:36:24	4
2655410	99	35	33,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:36:24	4
2655410	99	35	33,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	09:23:40	4
2655410	99	35	32,2	cyclictest	2744740	-21	kworker/u16:2+events_unbound	08:14:00	4
2655427	99	34	33,0	cyclictest	0	-21	swapper/7	12:33:47	7
2655427	99	34	27,1	cyclictest	0	-21	swapper/7	09:45:49	7
2655427	99	33	30,2	cyclictest	3259631	-21	ssh	11:36:26	7
2655419	99	33	30,2	cyclictest	3354281	-21	kworker/u16:3+flush-8:0	12:19:12	6
2655414	99	33	30,2	cyclictest	2984699	-21	kworker/u16:1+events_unbound	10:29:12	5
2655414	99	32	29,2	cyclictest	3142267	-21	kworker/u16:6+flush-8:0	10:54:03	5
2655410	99	32	30,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	11:05:47	4
2655410	99	32	30,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	08:29:28	4
2655427	99	31	0,30	cyclictest	5417	-21	sshd	09:21:19	7
2655419	99	31	28,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	10:24:19	6
2655414	99	31	29,2	cyclictest	2879239	-21	kworker/u16:2+events_unbound	09:49:12	5
2655410	99	31	29,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	08:36:20	4
2655419	99	30	28,2	cyclictest	3142267	-21	kworker/u16:6+flush-8:0	11:39:34	6
2655410	99	30	27,2	cyclictest	2744740	-21	kworker/u16:2+events_unbound	07:54:00	4
2655427	99	29	29,0	cyclictest	0	-21	swapper/7	12:27:38	7
2655427	99	29	28,0	cyclictest	0	-21	swapper/7	08:48:20	7
2655427	99	29	23,5	cyclictest	2706865	-21	latency_hist	07:28:58	7
2655419	99	29	27,2	cyclictest	2869122	-21	kworker/u16:1+flush-8:0	08:58:58	6
2655414	99	29	26,2	cyclictest	3298844	-21	kworker/u16:0+events_unbound	12:29:12	5
2655427	99	28	28,0	cyclictest	0	-21	swapper/7	11:01:44	7
2655427	99	28	28,0	cyclictest	0	-21	swapper/7	09:32:22	7
2655427	99	28	27,0	cyclictest	0	-21	swapper/7	09:25:26	7
2655427	99	28	21,5	cyclictest	650	-21	systemd-journal	09:03:58	7
2655410	99	28	26,2	cyclictest	2812122	-21	kworker/u16:3+events_unbound	08:53:09	4
2655410	99	28	26,2	cyclictest	2744740	-21	kworker/u16:2+events_unbound	07:46:19	4
2655427	99	27	27,0	cyclictest	0	-21	swapper/7	11:30:14	7
2655414	99	27	25,2	cyclictest	2984699	-21	kworker/u16:1+flush-8:0	10:34:21	5
2655410	99	27	25,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	08:28:20	4
2655410	99	27	25,2	cyclictest	2602101	-21	kworker/u16:0+events_unbound	08:04:08	4
2655427	99	26	25,0	cyclictest	0	-21	swapper/7	07:13:29	7
2655414	99	26	24,2	cyclictest	3128873	-21	kworker/u16:5+flush-8:0	11:49:08	5
2655414	99	26	23,2	cyclictest	3117214	-21	kworker/u16:2+flush-8:0	11:24:21	5
2655414	99	26	23,2	cyclictest	3117214	-21	kworker/u16:2+events_unbound	11:34:13	5
2655427	99	25	25,0	cyclictest	0	-21	swapper/7	10:07:54	7
2655414	99	25	22,2	cyclictest	3128873	-21	kworker/u16:5+events_unbound	11:54:11	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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