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 Jul 27, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1678338	2	99	0,1	sleep4	65	-21	ksoftirqd/4	19:34:28	4
2050607	2	96	0,1	sleep4	0	-21	swapper/4	22:24:32	4
1622768	2	74	63,8	sleep4	0	-21	swapper/4	19:06:49	4
1623237	99	51	49,2	cyclictest	2275865	-21	kworker/u16:1+events_unbound	00:09:42	5
1623233	99	48	46,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	22:09:35	4
1623237	99	45	43,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	00:14:24	5
1623237	99	45	42,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:09:25	5
1623233	99	45	42,2	cyclictest	2165254	-21	kworker/u16:1+events_unbound	23:39:11	4
1622702	2	45	35,7	sleep5	0	-21	swapper/5	19:05:54	5
1623242	99	44	42,2	cyclictest	1897765	-21	kworker/u16:5+flush-8:0	21:34:09	6
1622817	2	44	10,29	sleep7	0	-21	swapper/7	19:07:32	7
1623243	99	43	0,41	cyclictest	2092266	-21	latency_hist	22:44:08	7
1623242	99	43	40,3	cyclictest	1763266	-21	kworker/u16:2+flush-8:0	21:04:09	6
1623237	99	42	40,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	23:09:33	5
1623233	99	42	40,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:04:34	4
1623237	99	41	39,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	23:39:25	5
1623237	99	38	36,2	cyclictest	1947998	-21	kworker/u16:0+events_unbound	21:50:35	5
1623237	99	38	36,2	cyclictest	1897765	-21	kworker/u16:5+flush-8:0	23:14:38	5
1623233	99	38	35,2	cyclictest	1695102	-21	kworker/u16:3+events_unbound	19:54:11	4
1623233	99	38	35,2	cyclictest	1695102	-21	kworker/u16:3+events_unbound	19:54:11	4
1623237	99	37	35,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:51:30	5
1623233	99	37	35,2	cyclictest	1970328	-21	kworker/u16:3+flush-8:0	23:19:25	4
1623233	99	37	35,2	cyclictest	1970328	-21	kworker/u16:3+flush-8:0	23:19:25	4
1623237	99	36	34,2	cyclictest	2165254	-21	kworker/u16:1+events_unbound	23:33:11	5
1623237	99	36	34,2	cyclictest	1970328	-21	kworker/u16:3+flush-8:0	22:29:39	5
1623237	99	36	34,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	23:04:06	5
1623233	99	36	34,2	cyclictest	2090176	-21	kworker/u16:0+events_unbound	23:12:03	4
1623233	99	36	34,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:14:28	4
1623233	99	36	34,2	cyclictest	1763266	-21	kworker/u16:2+events_unbound	21:59:25	4
2255285	2	35	0,1	chrt	0	-21	swapper/5	23:49:28	5
1623242	99	35	32,2	cyclictest	1970328	-21	kworker/u16:3+flush-8:0	00:14:26	6
1623233	99	35	34,1	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:56:11	4
1623233	99	35	33,2	cyclictest	2225680	-21	kworker/u16:2+flush-8:0	23:44:41	4
1623233	99	35	33,2	cyclictest	2140903	-21	kworker/u16:4+events_unbound	23:07:10	4
1623233	99	35	33,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	23:01:42	4
1623233	99	35	33,2	cyclictest	1894201	-21	kworker/u16:1+events_unbound	21:42:07	4
1623233	99	35	33,2	cyclictest	1894201	-21	kworker/u16:1+events_unbound	21:25:27	4
1623237	99	34	32,2	cyclictest	2332702	-21	kworker/u16:1+events_unbound	00:21:47	5
1623237	99	34	32,2	cyclictest	2140903	-21	kworker/u16:4+events_unbound	23:06:11	5
1623237	99	34	32,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	00:35:26	5
1623237	99	34	32,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	00:32:26	5
1623237	99	34	32,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	22:21:16	5
1623237	99	34	32,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	21:24:59	5
1623233	99	34	32,2	cyclictest	2260233	-21	kworker/u16:4+events_unbound	00:21:55	4
1623233	99	34	32,2	cyclictest	2260233	-21	kworker/u16:4+events_unbound	00:13:15	4
1623233	99	34	32,2	cyclictest	2187247	-21	kworker/u16:0+events_unbound	00:18:22	4
1623233	99	34	32,2	cyclictest	2187247	-21	kworker/u16:0+events_unbound	00:07:55	4
1623233	99	34	32,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:30:51	4
1623233	99	34	32,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	22:44:22	4
1623233	99	34	32,2	cyclictest	1831220	-21	kworker/u16:4+flush-8:0	21:23:22	4
1623233	99	34	32,2	cyclictest	1831220	-21	kworker/u16:4+flush-8:0	21:23:22	4
1623233	99	34	32,2	cyclictest	1831220	-21	kworker/u16:4+events_unbound	21:33:08	4
1623237	99	33	31,2	cyclictest	2275865	-21	kworker/u16:1+events_unbound	00:05:11	5
1623237	99	33	31,2	cyclictest	2260233	-21	kworker/u16:4+flush-8:0	00:26:14	5
1623237	99	33	31,2	cyclictest	2187247	-21	kworker/u16:0+events_unbound	23:25:32	5
1623237	99	33	31,2	cyclictest	1763266	-21	kworker/u16:2+events_unbound	21:47:51	5
1623233	99	33	31,2	cyclictest	2187247	-21	kworker/u16:0+events_unbound	23:32:11	4
1623233	99	33	31,2	cyclictest	2165254	-21	kworker/u16:1+events_unbound	23:34:59	4
1623233	99	33	31,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:36:02	4
1623233	99	33	31,2	cyclictest	1894201	-21	kworker/u16:1+events_unbound	21:58:50	4
1623237	99	32	30,2	cyclictest	2054988	-21	kworker/u16:1+events_unbound	22:34:28	5
1623237	99	32	30,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	22:25:54	5
1623237	99	32	30,2	cyclictest	1753626	-21	kworker/u16:1+events_unbound	20:49:10	5
1623233	99	32	30,2	cyclictest	2357999	-21	kworker/u16:2+flush-8:0	00:34:40	4
1623233	99	32	30,2	cyclictest	2357999	-21	kworker/u16:2+events_unbound	00:30:27	4
1623233	99	32	30,2	cyclictest	2260233	-21	kworker/u16:4+events_unbound	23:58:22	4
1623233	99	32	30,2	cyclictest	2054988	-21	kworker/u16:1+events_unbound	22:42:11	4
1623233	99	32	30,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:21:38	4
1623233	99	32	30,2	cyclictest	1947998	-21	kworker/u16:0+flush-8:0	21:53:14	4
1623233	99	32	30,2	cyclictest	1841531	-21	kworker/u16:3+flush-8:0	21:16:22	4
1623233	99	32	30,2	cyclictest	1763266	-21	kworker/u16:2+events_unbound	21:46:23	4
1623233	99	32	30,2	cyclictest	1763266	-21	kworker/u16:2+events_unbound	21:12:52	4
1622922	2	32	22,7	sleep6	0	-21	swapper/6	19:09:00	6
1623237	99	31	29,2	cyclictest	2275865	-21	kworker/u16:1+flush-8:0	23:59:43	5
1623237	99	31	29,2	cyclictest	2090176	-21	kworker/u16:0+flush-8:0	22:43:50	5
1623237	99	31	29,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	22:16:02	5
1623237	99	31	29,2	cyclictest	1753626	-21	kworker/u16:1+events_unbound	21:09:06	5
1623237	99	31	28,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	23:34:24	5
1623237	99	31	28,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	21:59:27	5
1623233	99	31	29,2	cyclictest	2260233	-21	kworker/u16:4+events_unbound	23:50:23	4
1623233	99	31	29,2	cyclictest	2225680	-21	kworker/u16:2+events_unbound	00:00:06	4
1623233	99	31	29,2	cyclictest	2140903	-21	kworker/u16:4+flush-8:0	23:24:32	4
1623233	99	31	28,2	cyclictest	2114398	-21	kworker/u16:2+events_unbound	22:51:50	4
1623233	99	31	28,2	cyclictest	1970328	-21	kworker/u16:3+flush-8:0	00:29:08	4
1623237	99	30	28,2	cyclictest	2165254	-21	kworker/u16:1+events_unbound	23:20:02	5
1623237	99	30	28,2	cyclictest	2165254	-21	kworker/u16:1+events_unbound	23:20:02	5
1623237	99	30	28,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:07:51	5
1623237	99	30	28,2	cyclictest	1695102	-21	kworker/u16:3+flush-8:0	20:40:42	5
1623237	99	30	28,2	cyclictest	1695102	-21	kworker/u16:3+flush-8:0	20:40:42	5
1623233	99	30	27,2	cyclictest	1351324	-21	kworker/u16:0+events_unbound	19:09:12	4
1623237	99	29	27,2	cyclictest	2225680	-21	kworker/u16:2+events_unbound	23:44:37	5
1623237	99	29	27,2	cyclictest	1970328	-21	kworker/u16:3+events_unbound	22:54:36	5
1623233	99	29	27,2	cyclictest	1897765	-21	kworker/u16:5+flush-8:0	21:37:53	4
1623233	99	29	27,2	cyclictest	1646351	-21	kworker/u16:2+events_unbound	19:25:19	4
1623237	99	28	26,2	cyclictest	1897765	-21	kworker/u16:5+flush-8:0	21:34:02	5
1623237	99	28	26,2	cyclictest	1897765	-21	kworker/u16:5+events_unbound	21:58:09	5
1623237	99	28	26,2	cyclictest	1763266	-21	kworker/u16:2+events_unbound	21:13:53	5
2213820	2	27	0,1	chrt	2213821	-21	sh	23:34:08	7
1623242	99	27	25,2	cyclictest	1351324	-21	kworker/u16:0+flush-8:0	19:19:28	6
1623237	99	27	25,2	cyclictest	1894201	-21	kworker/u16:1+flush-8:0	21:40:42	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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