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 Mar 10, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
11218	99	68	65,2	cyclictest	460857	-21	kworker/u16:1+events_unbound	12:09:35	6
11223	99	58	55,2	cyclictest	733452	-21	ntpq	12:24:32	7
11218	99	52	50,2	cyclictest	460857	-21	kworker/u16:1+events_unbound	11:09:33	6
11223	99	50	47,2	cyclictest	338079	-21	timerwakeupswit	09:39:37	7
11223	99	49	48,0	cyclictest	0	-21	swapper/7	10:39:25	7
11223	99	48	0,46	cyclictest	472822	-21	latency_hist	10:39:06	7
1400	2	47	36,7	sleep5	0	-21	swapper/5	06:59:11	5
11223	99	46	0,44	cyclictest	605699	-21	fschecks_count	11:34:20	7
11223	99	44	43,0	cyclictest	0	-21	swapper/7	09:54:44	7
11223	99	44	41,2	cyclictest	505772	-21	ntpq	10:49:35	7
11223	99	42	40,1	cyclictest	244475	-21	diskmemload	11:49:25	7
11223	99	42	40,1	cyclictest	107	-21	kcompactd0	11:14:42	7
11218	99	42	39,2	cyclictest	34038	-21	kworker/u16:1+events_unbound	07:49:22	6
11223	99	41	40,0	cyclictest	0	-21	swapper/7	12:29:44	7
11223	99	41	0,39	cyclictest	697689	-21	rm	12:09:37	7
11218	99	41	39,2	cyclictest	482487	-21	kworker/u16:0+events_unbound	10:44:32	6
10645	2	41	30,8	sleep4	0	-21	swapper/4	07:00:06	4
11223	99	40	0,38	cyclictest	167946	-21	latency_hist	08:24:07	7
11218	99	40	38,2	cyclictest	244956	-21	kworker/u16:4+events_unbound	10:04:48	6
11223	99	39	37,1	cyclictest	244475	-21	diskmemload	12:19:34	7
11223	99	39	37,1	cyclictest	244475	-21	diskmemload	09:59:55	7
11223	99	39	36,2	cyclictest	307689	-21	ssh	09:29:26	7
11218	99	39	37,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	10:00:32	6
11218	99	39	37,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	09:36:20	6
1910	2	38	3,30	sleep7	0	-21	swapper/7	06:59:21	7
11223	99	38	34,3	cyclictest	544413	-21	ssh	11:08:36	7
11223	99	38	33,4	cyclictest	280610	-21	latency_hist	09:19:06	7
11218	99	38	36,2	cyclictest	688579	-21	kworker/u16:2+events_unbound	12:33:08	6
11218	99	38	36,2	cyclictest	425260	-21	kworker/u16:4+events_unbound	11:32:41	6
11218	99	38	36,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	09:42:21	6
10891	2	38	28,7	sleep6	0	-21	swapper/6	07:03:37	6
11223	99	37	34,2	cyclictest	402227	-21	sed	10:09:20	7
11218	99	37	35,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	09:48:37	6
11218	99	37	35,2	cyclictest	388811	-21	kworker/u16:2+events_unbound	10:35:46	6
11218	99	37	35,2	cyclictest	244956	-21	kworker/u16:4+events_unbound	09:08:17	6
11212	99	37	35,2	cyclictest	205166	-21	kworker/u16:1+flush-8:0	09:44:06	4
11223	99	36	33,2	cyclictest	393751	-21	kthreadcore	10:04:28	7
11223	99	36	0,34	cyclictest	207760	-21	cut	08:44:23	7
11218	99	36	34,2	cyclictest	602776	-21	kworker/u16:0+events_unbound	11:41:01	6
11218	99	36	34,2	cyclictest	460857	-21	kworker/u16:1+flush-8:0	10:39:38	6
11218	99	36	34,2	cyclictest	425260	-21	kworker/u16:4+events_unbound	11:19:35	6
11218	99	36	33,2	cyclictest	1402	-21	kworker/u16:3+events_unbound	07:19:34	6
11223	99	35	34,0	cyclictest	0	-21	swapper/7	11:32:27	7
11223	99	35	34,0	cyclictest	0	-21	swapper/7	11:26:12	7
11223	99	35	33,1	cyclictest	244475	-21	diskmemload	09:06:28	7
11223	99	35	31,3	cyclictest	5747	-21	gnome-shell	10:30:16	7
11218	99	35	33,2	cyclictest	602776	-21	kworker/u16:0+events_unbound	12:22:58	6
11218	99	35	33,2	cyclictest	602776	-21	kworker/u16:0+events_unbound	12:03:57	6
11218	99	35	33,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	10:25:00	6
11218	99	35	33,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	10:14:34	6
11218	99	35	33,2	cyclictest	205166	-21	kworker/u16:1+flush-8:0	08:44:37	6
11218	99	35	33,2	cyclictest	1402	-21	kworker/u16:3+flush-8:0	07:09:38	6
11218	99	35	32,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	08:54:25	6
11223	99	34	34,0	cyclictest	0	-21	swapper/7	10:23:45	7
11223	99	34	33,0	cyclictest	0	-21	swapper/7	09:34:40	7
11223	99	34	33,0	cyclictest	0	-21	swapper/7	09:21:48	7
11223	99	34	33,0	cyclictest	0	-21	swapper/7	07:29:40	7
11223	99	34	31,2	cyclictest	21034	-21	munin-node	07:09:12	7
11223	99	34	30,2	cyclictest	342023	-21	iostat_ios	09:44:21	7
11218	99	34	32,2	cyclictest	688579	-21	kworker/u16:2+flush-8:0	12:14:52	6
11218	99	34	32,2	cyclictest	53356	-21	kworker/u16:2+events_unbound	08:09:32	6
11218	99	34	32,2	cyclictest	4157381	-21	kworker/u16:0+flush-8:0	09:29:42	6
11218	99	34	32,2	cyclictest	244956	-21	kworker/u16:4+events_unbound	09:13:18	6
11223	99	33	31,1	cyclictest	447148	-21	ssh	10:26:00	7
11223	99	33	31,1	cyclictest	244475	-21	diskmemload	09:28:21	7
11218	99	33	31,2	cyclictest	53356	-21	kworker/u16:2+flush-8:0	08:14:35	6
11218	99	33	31,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	08:39:37	6
11218	99	33	31,2	cyclictest	205166	-21	kworker/u16:1+events_unbound	09:14:34	6
11218	99	33	31,2	cyclictest	149212	-21	kworker/u16:3+events_unbound	08:26:28	6
11218	99	33	30,2	cyclictest	34038	-21	kworker/u16:1+events_unbound	07:30:52	6
11223	99	32	32,0	cyclictest	0	-21	swapper/7	11:58:28	7
11223	99	32	31,1	cyclictest	675424	-21	ssh	12:01:52	7
11223	99	32	0,31	cyclictest	267054	-21	ssh	09:11:21	7
11223	99	32	0,30	cyclictest	142051	-21	cut	08:09:24	7
11218	99	32	30,2	cyclictest	482487	-21	kworker/u16:0+events_unbound	11:17:38	6
11218	99	32	30,2	cyclictest	460857	-21	kworker/u16:1+events_unbound	12:08:07	6
11218	99	32	30,2	cyclictest	460857	-21	kworker/u16:1+events_unbound	12:08:07	6
11218	99	32	30,2	cyclictest	425260	-21	kworker/u16:4+events_unbound	11:00:43	6
11218	99	32	30,2	cyclictest	205166	-21	kworker/u16:1+events_unbound	09:56:47	6
11218	99	32	30,2	cyclictest	205166	-21	kworker/u16:1+events_unbound	09:53:26	6
11218	99	32	29,2	cyclictest	482487	-21	kworker/u16:0+events_unbound	10:49:06	6
11223	99	31	31,0	cyclictest	0	-21	swapper/7	11:48:56	7
11223	99	31	31,0	cyclictest	0	-21	swapper/7	10:57:49	7
11223	99	31	30,0	cyclictest	0	-21	swapper/7	10:14:15	7
11223	99	31	30,0	cyclictest	0	-21	swapper/7	08:14:17	7
11223	99	31	30,0	cyclictest	0	-21	swapper/7	07:39:22	7
11223	99	31	28,2	cyclictest	712483	-21	ssh	12:19:05	7
11218	99	31	29,2	cyclictest	602776	-21	kworker/u16:0+flush-8:0	11:55:16	6
11218	99	31	29,2	cyclictest	460857	-21	kworker/u16:1+events_unbound	11:48:01	6
11218	99	31	29,2	cyclictest	425260	-21	kworker/u16:4+events_unbound	11:06:37	6
11218	99	31	29,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	10:20:01	6
11218	99	31	29,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	10:11:13	6
11218	99	31	29,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	08:51:17	6
11218	99	31	29,2	cyclictest	388811	-21	kworker/u16:2+events_unbound	10:31:38	6
11223	99	30	0,28	cyclictest	111680	-21	sh	07:54:21	7
11218	99	30	28,2	cyclictest	615563	-21	kworker/u16:2+events_unbound	11:49:23	6
11218	99	30	28,2	cyclictest	580687	-21	kworker/u16:2+events_unbound	11:25:42	6
11218	99	30	27,2	cyclictest	53356	-21	kworker/u16:2+flush-8:0	07:59:36	6
11218	99	30	27,2	cyclictest	53356	-21	kworker/u16:2+flush-8:0	07:59:36	6
11218	99	30	27,2	cyclictest	4157381	-21	kworker/u16:0+events_unbound	08:20:52	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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