OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #f, slot #7

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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 rackfslot7.osadl.org (updated Mon Jul 20, 2026 12:46:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
984530	99	59	1,39	cyclictest	236199	-21	snmpd	11:27:05	1
984533	99	56	37,19	cyclictest	362	-21	jbd2/sda2-8	12:10:29	4
984533	99	56	36,19	cyclictest	877	-21	mta-sts-daemon	08:50:16	4
984537	99	55	0,15	cyclictest	0	-21	swapper/7	08:10:17	7
984533	99	52	50,1	cyclictest	1009861	-21	kworker/4:0	08:10:11	4
984530	99	52	31,19	cyclictest	0	-21	swapper/1	08:30:09	1
984530	99	52	31,0	cyclictest	0	-21	swapper/1	10:06:57	1
984530	99	51	33,18	cyclictest	0	-21	swapper/1	11:40:25	1
984537	99	50	12,19	cyclictest	0	-21	swapper/7	07:15:18	7
984532	99	50	12,38	cyclictest	0	-21	swapper/3	12:30:17	3
984532	99	50	12,19	cyclictest	0	-21	swapper/3	07:50:17	3
984530	99	50	32,18	cyclictest	0	-21	swapper/1	09:27:49	1
984530	99	50	31,19	cyclictest	0	-21	swapper/1	11:52:16	1
984530	99	50	31,19	cyclictest	0	-21	swapper/1	09:07:17	1
984530	99	50	31,0	cyclictest	0	-21	swapper/1	07:58:57	1
984530	99	50	0,31	cyclictest	0	-21	swapper/1	11:00:47	1
984537	99	49	11,19	cyclictest	0	-21	swapper/7	08:15:16	7
984530	99	49	31,18	cyclictest	0	-21	swapper/1	09:00:17	1
984530	99	49	30,19	cyclictest	0	-21	swapper/1	10:14:27	1
984530	99	49	30,19	cyclictest	0	-21	swapper/1	09:25:01	1
984530	99	49	30,19	cyclictest	0	-21	swapper/1	09:25:01	1
984533	99	48	10,19	cyclictest	0	-21	swapper/4	12:05:16	4
984532	99	48	10,19	cyclictest	0	-21	swapper/3	08:45:17	3
984533	99	47	9,19	cyclictest	0	-21	swapper/4	10:55:17	4
984533	99	47	29,18	cyclictest	105	-21	kcompactd0	11:58:28	4
984532	99	46	9,18	cyclictest	0	-21	swapper/3	10:35:15	3
984537	99	45	7,19	cyclictest	0	-21	swapper/7	12:10:16	7
984532	99	45	26,19	cyclictest	0	-21	swapper/3	10:20:16	3
984530	99	45	26,19	cyclictest	0	-21	swapper/1	09:42:21	1
984529	99	45	26,19	cyclictest	0	-21	swapper/0	07:50:17	0
984533	99	44	5,39	cyclictest	0	-21	swapper/4	09:10:16	4
984532	99	43	5,19	cyclictest	0	-21	swapper/3	09:00:16	3
984531	99	43	24,19	cyclictest	0	-21	swapper/2	12:35:16	2
984531	99	42	4,19	cyclictest	0	-21	swapper/2	11:50:16	2
984530	99	42	19,0	cyclictest	984867	-21	/usr/sbin/munin	07:10:23	1
984537	99	41	2,19	cyclictest	0	-21	swapper/7	08:35:17	7
984532	99	41	3,38	cyclictest	0	-21	swapper/3	12:00:16	3
984531	99	41	3,19	cyclictest	0	-21	swapper/2	09:15:18	2
984531	99	41	3,19	cyclictest	0	-21	swapper/2	08:55:16	2
984530	99	41	1,39	cyclictest	0	-21	swapper/1	11:20:13	1
984530	99	40	0,39	cyclictest	0	-21	swapper/1	12:19:27	1
984530	99	40	0,39	cyclictest	0	-21	swapper/1	07:48:51	1
984537	99	39	0,39	cyclictest	0	-21	swapper/7	09:55:16	7
984530	99	39	0,39	cyclictest	0	-21	swapper/1	12:34:47	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	12:28:27	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	12:14:49	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	12:07:05	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	11:48:35	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	11:10:13	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	10:26:59	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	10:23:25	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	09:36:13	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:55:59	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:52:14	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:48:55	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:36:37	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:16:53	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	08:06:03	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	07:30:13	1
984530	99	39	0,39	cyclictest	0	-21	swapper/1	07:20:33	1
984537	99	38	37,0	cyclictest	0	-21	swapper/7	08:00:15	7
984534	99	38	38,0	cyclictest	1050328	-21	kworker/5:0+events	09:28:47	5
984534	99	38	37,0	cyclictest	996050	-21	kworker/5:2+events	08:03:55	5
984534	99	38	37,0	cyclictest	1132695	-21	kworker/5:0+events	12:00:07	5
984534	99	38	37,0	cyclictest	1132695	-21	kworker/5:0+events	11:50:03	5
984534	99	38	37,0	cyclictest	1050328	-21	kworker/5:0+events	09:41:27	5
984534	99	38	36,1	cyclictest	975798	-21	kworker/5:1+events	07:39:19	5
984530	99	38	19,19	cyclictest	0	-21	swapper/1	10:05:01	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	12:38:57	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	12:02:37	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	10:43:29	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	10:38:01	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	09:56:09	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	09:52:29	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	09:15:24	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	08:43:33	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	08:10:37	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	08:03:00	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	07:53:44	1
984530	99	38	0,38	cyclictest	0	-21	swapper/1	07:43:35	1
984530	99	38	0,19	cyclictest	988493	-21	irqstats	07:15:19	1
984537	99	37	18,19	cyclictest	88	-21	ksoftirqd/7	10:40:23	7
984534	99	37	37,0	cyclictest	996050	-21	kworker/5:2+events	07:44:39	5
984534	99	37	37,0	cyclictest	996050	-21	kworker/5:2+events	07:30:59	5
984534	99	37	37,0	cyclictest	975798	-21	kworker/5:1+events	07:29:22	5
984534	99	37	37,0	cyclictest	1140926	-21	kworker/5:1+events	12:34:07	5
984534	99	37	37,0	cyclictest	1140926	-21	kworker/5:1+events	12:05:35	5
984534	99	37	37,0	cyclictest	1124483	-21	kworker/5:2+events	11:21:55	5
984534	99	37	37,0	cyclictest	1114495	-21	kworker/5:1+events	11:37:55	5
984534	99	37	37,0	cyclictest	1094259	-21	kworker/5:0+events	10:30:39	5
984534	99	37	37,0	cyclictest	1068285	-21	kworker/5:2+events	10:12:35	5
984534	99	37	37,0	cyclictest	1055811	-21	kworker/5:1+events	09:23:03	5
984534	99	37	37,0	cyclictest	1055811	-21	kworker/5:1+events	09:23:02	5
984534	99	37	37,0	cyclictest	1033863	-21	kworker/5:1+events	08:46:07	5
984534	99	37	37,0	cyclictest	1018245	-21	kworker/5:0+events	08:14:55	5
984534	99	37	36,0	cyclictest	1140926	-21	kworker/5:1+events	11:55:11	5
984534	99	37	36,0	cyclictest	1124483	-21	kworker/5:2+events	11:32:11	5
984534	99	37	36,0	cyclictest	1124483	-21	kworker/5:2+events	11:28:46	5
984534	99	37	36,0	cyclictest	1106007	-21	kworker/5:2+events	10:55:07	5
984534	99	37	36,0	cyclictest	1036624	-21	kworker/5:2+events	08:56:27	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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