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 Sun Mar 22, 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
3798399	2	93	0,0	sleep4	0	-21	swapper/4	11:23:18	4
3343330	2	65	0,1	sleep7	0	-21	swapper/7	07:58:38	7
3229000	2	59	47,8	sleep4	0	-21	swapper/4	07:01:39	4
3229422	99	53	49,3	cyclictest	3433771	-21	kworker/u16:4+flush-8:0	11:25:23	5
3229422	99	43	41,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	09:03:47	5
3229422	99	42	39,2	cyclictest	3570038	-21	kworker/u16:2+events_unbound	10:23:18	5
3228919	2	40	29,7	sleep6	0	-21	swapper/6	07:00:29	6
3228377	2	40	4,30	sleep7	0	-21	swapper/7	06:58:54	7
3228859	2	38	27,8	sleep5	0	-21	swapper/5	06:59:40	5
3229429	99	36	0,34	cyclictest	3462569	-21	cat	09:03:18	7
3229418	99	35	34,1	cyclictest	3798346	-21	kworker/u16:1+events_unbound	11:25:21	4
3229422	99	33	31,2	cyclictest	3942803	-21	kworker/u16:2+events_unbound	12:28:14	5
3229429	99	32	31,0	cyclictest	0	-21	swapper/7	11:33:37	7
3229429	99	32	31,0	cyclictest	0	-21	swapper/7	07:08:49	7
3229422	99	32	30,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	10:29:37	5
3229418	99	32	29,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	10:43:41	4
3229429	99	31	30,0	cyclictest	0	-21	swapper/7	09:48:35	7
3229422	99	31	29,2	cyclictest	3940715	-21	kworker/u16:1+events_unbound	12:28:59	5
3229418	99	31	29,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	09:18:40	4
3229418	99	31	29,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:28:35	4
3229418	99	31	29,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:28:35	4
3229418	99	30	28,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	11:53:35	4
3229422	99	29	27,2	cyclictest	3747907	-21	kworker/u16:2+flush-8:0	11:04:06	5
3229429	99	28	27,0	cyclictest	0	-21	swapper/7	09:33:23	7
3229429	99	28	0,26	cyclictest	3567178	-21	ssh	09:43:40	7
3229422	99	28	26,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	10:07:49	5
3229418	99	28	26,2	cyclictest	3433771	-21	kworker/u16:4+flush-8:0	08:58:39	4
3229418	99	28	26,2	cyclictest	3424523	-21	kworker/u16:1+events_unbound	08:53:37	4
3712221	2	27	0,1	chrt	3712222	-21	sh	10:44:26	7
3229429	99	27	22,4	cyclictest	3405050	-21	latency_hist	08:33:19	7
3229429	99	27	22,4	cyclictest	3405050	-21	latency_hist	08:33:19	7
3229422	99	27	25,2	cyclictest	3868094	-21	kworker/u16:0+events_unbound	12:04:02	5
3229422	99	27	25,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	11:33:19	5
3229422	99	27	25,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	09:37:32	5
3229422	99	27	25,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:13:40	5
3229418	99	27	25,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:18:49	4
3229423	99	26	24,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	10:38:48	6
3229422	99	26	24,2	cyclictest	3469174	-21	kworker/u16:1+flush-8:0	09:59:00	5
3229422	99	26	24,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	09:48:56	5
3229422	99	26	24,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	11:09:05	5
3229422	99	26	24,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:45:49	5
3229422	99	26	24,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:45:49	5
3229422	99	26	23,2	cyclictest	3808867	-21	kworker/u16:2+events_unbound	11:33:45	5
3229418	99	26	24,2	cyclictest	3868094	-21	kworker/u16:0+events_unbound	12:13:35	4
3229422	99	25	23,2	cyclictest	3666707	-21	kworker/u16:3+flush-8:0	11:14:04	5
3229422	99	25	23,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	10:49:00	5
3229422	99	25	23,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	09:44:38	5
3229422	99	25	23,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:39:00	5
3229422	99	25	23,2	cyclictest	3219678	-21	kworker/u16:3+events_unbound	07:18:09	5
3229423	99	24	19,5	cyclictest	3747907	-21	kworker/u16:2+flush-8:0	11:03:18	6
3229422	99	24	22,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	09:28:42	5
3229422	99	24	22,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:52:47	5
3229422	99	24	22,2	cyclictest	3238980	-21	kworker/u16:4+flush-8:0	07:23:52	5
3229418	99	24	22,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	10:28:40	4
3229429	99	23	21,1	cyclictest	3366986	-21	cut	08:13:19	7
3229422	99	23	21,2	cyclictest	3666707	-21	kworker/u16:3+flush-8:0	11:39:00	5
3229422	99	23	21,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	10:39:25	5
3229422	99	23	21,2	cyclictest	3570038	-21	kworker/u16:2+events_unbound	10:14:22	5
3229422	99	23	21,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:21:39	5
3229422	99	23	21,2	cyclictest	3200700	-21	kworker/u16:1+events_unbound	07:04:56	5
3229418	99	23	21,2	cyclictest	3570038	-21	kworker/u16:2+events_unbound	10:08:44	4
3229418	99	23	21,2	cyclictest	3469174	-21	kworker/u16:1+flush-8:0	10:23:40	4
3229418	99	23	21,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	11:33:41	4
3229429	99	22	0,21	cyclictest	3338195	-21	latency_hist	07:58:19	7
3229422	99	22	20,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:47:22	5
3229422	99	22	20,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:29:00	5
3229422	99	22	20,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	08:29:00	5
3229422	99	22	20,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:59:00	5
3229422	99	22	20,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:57:38	5
3229422	99	22	20,2	cyclictest	3219678	-21	kworker/u16:3+events_unbound	07:08:23	5
3229422	99	22	19,2	cyclictest	3424523	-21	kworker/u16:1+flush-8:0	08:53:19	5
3229422	99	22	19,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:33:24	5
3229418	99	22	20,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	11:49:01	4
3229429	99	21	0,20	cyclictest	3510647	-21	cat	09:23:19	7
3229422	99	21	19,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	07:52:27	5
3229418	99	21	19,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	11:39:01	4
3229418	99	21	19,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	11:28:46	4
3229418	99	21	19,2	cyclictest	3309918	-21	kworker/u16:1+events_unbound	08:13:32	4
3229418	99	21	19,2	cyclictest	3309918	-21	kworker/u16:1+events_unbound	07:51:50	4
3229418	99	21	19,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	08:03:36	4
3229429	99	20	19,0	cyclictest	0	-21	swapper/7	07:43:32	7
3229429	99	20	19,0	cyclictest	0	-21	swapper/7	07:43:32	7
3229422	99	20	18,2	cyclictest	3868094	-21	kworker/u16:0+events_unbound	12:13:45	5
3229422	99	20	18,2	cyclictest	3357474	-21	kworker/u16:3+events_unbound	09:00:08	5
3229422	99	20	18,2	cyclictest	3309918	-21	kworker/u16:1+events_unbound	08:21:54	5
3229422	99	20	18,2	cyclictest	3219678	-21	kworker/u16:3+events_unbound	07:28:43	5
3229418	99	20	18,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	11:13:41	4
3229418	99	20	18,2	cyclictest	3433771	-21	kworker/u16:4+events_unbound	10:03:33	4
3229422	99	19	17,2	cyclictest	3868094	-21	kworker/u16:0+events_unbound	11:59:40	5
3229422	99	19	17,2	cyclictest	3469174	-21	kworker/u16:1+flush-8:0	10:43:45	5
3229422	99	19	17,2	cyclictest	3433771	-21	kworker/u16:4+flush-8:0	10:53:52	5
3229422	99	19	17,2	cyclictest	3399475	-21	kworker/u16:2+events_unbound	08:37:26	5
3229422	99	19	17,2	cyclictest	3309918	-21	kworker/u16:1+events_unbound	08:12:39	5
3229422	99	19	17,2	cyclictest	3238980	-21	kworker/u16:4+events_unbound	08:07:42	5
3229418	99	19	17,2	cyclictest	3666707	-21	kworker/u16:3+events_unbound	11:43:41	4
3229418	99	19	17,2	cyclictest	3469174	-21	kworker/u16:1+events_unbound	09:53:31	4
3229418	99	19	17,2	cyclictest	3219678	-21	kworker/u16:3+events_unbound	07:33:32	4
3229418	99	19	16,2	cyclictest	3219678	-21	kworker/u16:3+flush-8:0	07:28:34	4
3229429	99	18	17,0	cyclictest	0	-21	swapper/7	08:18:33	7
3229429	99	18	14,3	cyclictest	1267	-21	snmpd	08:25:52	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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