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 Mon Feb 23, 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
1506146	99	65	62,2	cyclictest	2003397	-21	dnf	10:51:39	7
1505734	2	57	47,7	sleep4	0	-21	swapper/4	07:03:34	4
1505607	2	57	47,7	sleep5	0	-21	swapper/5	07:01:42	5
1506144	99	50	48,2	cyclictest	2162624	-21	kworker/u16:3+events_unbound	12:10:36	6
1506144	99	49	47,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:37:09	6
1506144	99	49	46,2	cyclictest	2198672	-21	kworker/u16:1+events_unbound	12:30:20	6
1506144	99	48	46,2	cyclictest	2184185	-21	kworker/u16:2+events_unbound	12:25:39	6
6265	89	46	0,39	rtkit-daemon	0	-21	swapper/6	07:00:58	6
1506146	99	46	40,5	cyclictest	2029619	-21	latency_hist	11:05:05	7
1506144	99	44	42,2	cyclictest	1595616	-21	kworker/u16:4+flush-8:0	08:30:06	6
1506144	99	43	41,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:35:08	6
1506144	99	42	40,2	cyclictest	1945246	-21	kworker/u16:0+flush-8:0	12:20:34	6
1506139	99	42	40,2	cyclictest	2198672	-21	kworker/u16:1+events_unbound	12:30:38	5
1506139	99	42	40,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:06:28	5
1506144	99	41	39,2	cyclictest	2184185	-21	kworker/u16:2+flush-8:0	12:15:36	6
1506144	99	41	38,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	12:00:07	6
1506144	99	41	38,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:10:07	6
1506144	99	41	38,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:10:07	6
1506144	99	40	38,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:39:12	6
1506144	99	39	37,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:21:27	6
1506144	99	39	37,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	10:19:40	6
1506144	99	39	37,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:23:28	6
1506139	99	39	37,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	12:14:23	5
1505553	2	39	3,31	sleep7	0	-21	swapper/7	07:00:56	7
1506146	99	38	0,36	cyclictest	1681649	-21	latency_hist	08:35:06	7
1506146	99	38	0,36	cyclictest	1681649	-21	latency_hist	08:35:06	7
1506144	99	38	36,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:58:12	6
1506139	99	38	36,2	cyclictest	2198672	-21	kworker/u16:1+events_unbound	12:20:18	5
1506139	99	38	36,2	cyclictest	2184185	-21	kworker/u16:2+events_unbound	12:26:16	5
1506139	99	38	36,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:31:25	5
1506146	99	37	31,5	cyclictest	2247055	-21	latency_hist	12:35:05	7
1506144	99	37	35,2	cyclictest	2087663	-21	kworker/u16:3+events_unbound	11:33:36	6
1506139	99	37	35,2	cyclictest	2184185	-21	kworker/u16:2+events_unbound	12:15:15	5
1506139	99	37	35,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	12:04:36	5
1506139	99	37	35,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:39:04	5
1506139	99	37	35,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:29:32	5
1506139	99	37	35,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:10:34	5
1506139	99	37	34,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:30:19	5
1506139	99	37	34,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:30:19	5
1506144	99	36	34,2	cyclictest	2041761	-21	kworker/u16:3+events_unbound	11:17:11	6
1506144	99	36	34,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:57:52	6
1506144	99	36	34,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:33:11	6
1506144	99	36	34,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:33:11	6
1506144	99	36	34,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:55:04	6
1506144	99	36	34,2	cyclictest	1810396	-21	kworker/u16:7+events_unbound	09:53:07	6
1506144	99	36	34,2	cyclictest	1810396	-21	kworker/u16:7+events_unbound	09:53:07	6
1506144	99	36	34,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:43:36	6
1506144	99	36	34,2	cyclictest	1624339	-21	kworker/u16:1+events_unbound	09:22:16	6
1506139	99	36	34,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:19:16	5
1506139	99	36	34,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:36:57	5
1506144	99	35	33,2	cyclictest	2101817	-21	kworker/u16:2+events_unbound	11:41:31	6
1506144	99	35	33,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:49:08	6
1506144	99	35	33,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:44:52	6
1506144	99	35	33,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:01:27	6
1506144	99	35	33,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	10:29:24	6
1506144	99	35	33,2	cyclictest	1700947	-21	kworker/u16:2+flush-8:0	09:27:39	6
1506144	99	35	33,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:13:28	6
1506144	99	35	33,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:31:16	6
1506144	99	35	33,2	cyclictest	1643828	-21	kworker/u16:3+flush-8:0	09:06:09	6
1506144	99	35	33,2	cyclictest	1595616	-21	kworker/u16:4+flush-8:0	07:55:06	6
1506139	99	35	33,2	cyclictest	2065821	-21	kworker/u16:2+flush-8:0	11:20:43	5
1506139	99	35	33,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:07:42	5
1506139	99	35	33,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:02:24	5
1506146	99	34	30,3	cyclictest	1944831	-21	latency_hist	10:30:06	7
1506144	99	34	32,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	11:48:31	6
1506144	99	34	32,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	10:51:31	6
1506144	99	34	32,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	10:05:55	6
1506144	99	34	32,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:49:57	6
1506144	99	34	31,2	cyclictest	2162624	-21	kworker/u16:3+events_unbound	12:05:10	6
1506139	99	34	32,2	cyclictest	2101817	-21	kworker/u16:2+events_unbound	11:56:20	5
1506139	99	34	32,2	cyclictest	2101817	-21	kworker/u16:2+events_unbound	11:44:15	5
1506139	99	34	32,2	cyclictest	1945246	-21	kworker/u16:0+flush-8:0	11:45:49	5
1506139	99	34	32,2	cyclictest	1894083	-21	kworker/u16:1+flush-8:0	10:40:48	5
1506139	99	34	32,2	cyclictest	1883921	-21	kworker/u16:0+events_unbound	10:05:39	5
1506139	99	34	32,2	cyclictest	1810396	-21	kworker/u16:7+events_unbound	09:52:00	5
1506139	99	34	32,2	cyclictest	1810396	-21	kworker/u16:7+events_unbound	09:52:00	5
1506139	99	34	32,2	cyclictest	1624339	-21	kworker/u16:1+events_unbound	09:21:59	5
1506144	99	33	31,2	cyclictest	2087663	-21	kworker/u16:3+events_unbound	11:26:16	6
1506144	99	33	31,2	cyclictest	1894083	-21	kworker/u16:1+flush-8:0	11:05:11	6
1506144	99	33	31,2	cyclictest	1810396	-21	kworker/u16:7+events_unbound	09:58:55	6
1506144	99	33	31,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:01:04	6
1506144	99	33	31,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:11:12	6
1506144	99	33	31,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:11:12	6
1506144	99	33	31,2	cyclictest	1624339	-21	kworker/u16:1+events_unbound	09:16:15	6
1506139	99	33	31,2	cyclictest	1798176	-21	kworker/u16:6+events_unbound	09:41:55	5
1506139	99	33	31,2	cyclictest	1700947	-21	kworker/u16:2+flush-8:0	09:25:52	5
1506139	99	32	30,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	12:09:37	5
1506139	99	32	30,2	cyclictest	1945246	-21	kworker/u16:0+events_unbound	10:51:37	5
1506139	99	32	30,2	cyclictest	1894083	-21	kworker/u16:1+events_unbound	11:32:35	5
1506139	99	32	30,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	10:04:39	5
1506139	99	32	30,2	cyclictest	1624339	-21	kworker/u16:1+events_unbound	09:18:47	5
1506135	99	32	30,2	cyclictest	1945246	-21	kworker/u16:0+flush-8:0	11:40:32	4
1506135	99	32	29,2	cyclictest	1624339	-21	kworker/u16:1+flush-8:0	09:27:11	4
1506146	99	31	0,30	cyclictest	2016649	-21	bash	10:58:35	7
1506144	99	31	29,2	cyclictest	1624339	-21	kworker/u16:1+events_unbound	08:42:36	6
1506139	99	31	29,2	cyclictest	2101817	-21	kworker/u16:2+events_unbound	11:52:59	5
1506139	99	30	28,2	cyclictest	1798176	-21	kworker/u16:6+events_unbound	09:55:53	5
1506139	99	30	28,2	cyclictest	1700947	-21	kworker/u16:2+events_unbound	09:50:03	5
1506139	99	30	28,2	cyclictest	1595616	-21	kworker/u16:4+events_unbound	08:11:16	5
2188908	2	29	0,1	chrt	0	-21	swapper/4	12:10:25	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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