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 Fri Feb 06, 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
558189	2	95	0,0	sleep4	0	-21	swapper/4	11:01:13	4
43047	99	50	48,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:16:43	6
43047	99	50	48,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:16:43	6
33554	2	49	38,7	sleep4	0	-21	swapper/4	07:01:21	4
43047	99	48	46,2	cyclictest	630843	-21	kworker/u16:3+events_unbound	11:36:39	6
43047	99	48	46,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:26:42	6
43038	99	47	45,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	10:25:12	4
43047	99	46	44,2	cyclictest	751431	-21	kworker/u16:0+flush-8:0	12:31:43	6
43047	99	46	44,2	cyclictest	655139	-21	kworker/u16:0+events_unbound	11:41:46	6
42505	2	46	11,30	sleep7	0	-21	swapper/7	07:02:29	7
43047	99	45	43,2	cyclictest	424799	-21	kworker/u16:0+flush-8:0	11:11:41	6
43049	99	44	0,42	cyclictest	650	-21	systemd-journal	12:10:26	7
43042	99	44	42,2	cyclictest	509662	-21	kworker/u16:1+events_unbound	11:41:13	5
43049	99	41	35,5	cyclictest	66110	-21	latency_hist	07:16:15	7
768547	2	40	0,0	sleep5	0	-21	swapper/5	12:31:31	5
43047	99	40	38,2	cyclictest	509662	-21	kworker/u16:1+events_unbound	10:46:41	6
43042	99	40	38,2	cyclictest	717885	-21	kworker/u16:5+events_unbound	12:26:45	5
43047	99	39	37,2	cyclictest	667101	-21	kworker/u16:4+events_unbound	11:54:07	6
43047	99	39	37,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	10:41:27	6
43047	99	39	37,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:01:35	6
43042	99	39	37,2	cyclictest	192319	-21	kworker/u16:0+flush-8:0	08:36:14	5
42631	2	39	29,7	sleep5	0	-21	swapper/5	07:04:19	5
43042	99	38	35,2	cyclictest	655139	-21	kworker/u16:0+flush-8:0	11:41:28	5
42473	2	38	27,8	sleep6	0	-21	swapper/6	07:02:04	6
43042	99	37	35,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	10:31:48	5
43042	99	37	35,2	cyclictest	192319	-21	kworker/u16:0+flush-8:0	08:31:14	5
43042	99	37	33,3	cyclictest	339960	-21	kworker/u16:4+flush-8:0	10:21:13	5
43047	99	36	34,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:29:06	6
43047	99	35	33,2	cyclictest	667101	-21	kworker/u16:4+events_unbound	11:57:54	6
43047	99	35	33,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	10:52:43	6
43047	99	35	33,2	cyclictest	301151	-21	kworker/u16:2+events_unbound	09:19:30	6
43049	99	34	32,1	cyclictest	700861	-21	ssh	11:56:56	7
43047	99	34	32,2	cyclictest	751431	-21	kworker/u16:0+events_unbound	12:22:15	6
43047	99	34	32,2	cyclictest	618715	-21	kworker/u16:0+events_unbound	11:28:05	6
43047	99	34	32,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	11:05:31	6
43047	99	34	32,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:24:31	6
43047	99	34	32,2	cyclictest	152632	-21	kworker/u16:5+events_unbound	08:29:34	6
43042	99	34	32,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	10:01:41	5
43049	99	33	32,0	cyclictest	0	-21	swapper/7	09:41:31	7
43047	99	33	31,2	cyclictest	424799	-21	kworker/u16:0+flush-8:0	11:06:34	6
43047	99	33	31,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	10:35:02	6
43047	99	33	31,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	09:32:30	6
43042	99	33	31,2	cyclictest	630843	-21	kworker/u16:3+flush-8:0	11:56:44	5
43042	99	33	31,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	11:11:44	5
43042	99	33	31,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:36:32	5
43038	99	33	31,2	cyclictest	717548	-21	kworker/u16:0+flush-8:0	12:10:18	4
43049	99	32	27,4	cyclictest	400540	-21	latency_hist	09:56:14	7
43047	99	32	30,2	cyclictest	594501	-21	kworker/u16:2+events_unbound	11:33:06	6
43047	99	32	30,2	cyclictest	594501	-21	kworker/u16:2+events_unbound	11:20:05	6
43047	99	32	30,2	cyclictest	509662	-21	kworker/u16:1+events_unbound	11:49:51	6
43047	99	32	30,2	cyclictest	509662	-21	kworker/u16:1+events_unbound	11:23:34	6
43047	99	32	30,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	10:14:03	6
43047	99	32	30,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	09:37:31	6
43047	99	32	30,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:10:30	6
43047	99	32	30,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	09:43:03	6
43047	99	32	30,2	cyclictest	301151	-21	kworker/u16:2+events_unbound	09:12:18	6
43047	99	32	29,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	09:21:23	6
43042	99	32	30,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	09:46:14	5
43047	99	31	29,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:06:55	6
43047	99	31	29,2	cyclictest	353774	-21	kworker/u16:1+events_unbound	09:55:51	6
43047	99	31	29,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	10:38:58	6
43042	99	31	27,3	cyclictest	424799	-21	kworker/u16:0+flush-8:0	10:26:41	5
642739	2	30	0,1	chrt	642740	-21	sh	11:35:55	7
43047	99	30	28,2	cyclictest	709375	-21	kworker/u16:2+flush-8:0	12:01:44	6
43047	99	30	28,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	11:01:03	6
43047	99	30	28,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	09:47:11	6
43047	99	30	28,2	cyclictest	260355	-21	kworker/u16:1+events_unbound	09:08:31	6
43047	99	30	28,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	08:43:44	6
43042	99	30	28,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	09:51:09	5
43047	99	29	27,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:12:49	6
43047	99	29	27,2	cyclictest	339960	-21	kworker/u16:4+events_unbound	10:17:15	6
43047	99	29	27,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	08:58:29	6
43047	99	29	27,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	08:46:42	6
43042	99	29	27,2	cyclictest	424799	-21	kworker/u16:0+events_unbound	11:06:41	5
43047	99	28	26,2	cyclictest	260355	-21	kworker/u16:1+events_unbound	09:27:23	6
43047	99	28	26,2	cyclictest	104838	-21	kworker/u16:1+events_unbound	07:37:33	6
43047	99	28	25,2	cyclictest	4188967	-21	kworker/u16:0+events_unbound	07:46:15	6
43047	99	27	25,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	08:06:56	6
43047	99	27	25,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	07:32:48	6
43047	99	27	25,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	07:32:48	6
43047	99	27	25,2	cyclictest	338625	-21	kworker/u16:3+events_unbound	09:56:18	6
43047	99	27	25,2	cyclictest	104838	-21	kworker/u16:1+events_unbound	08:15:36	6
43042	99	27	25,2	cyclictest	667101	-21	kworker/u16:4+events_unbound	11:51:52	5
43049	99	26	20,5	cyclictest	315616	-21	latency_hist	09:21:14	7
43047	99	26	24,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	08:17:17	6
43047	99	26	24,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	07:29:30	6
43047	99	26	24,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	08:35:08	6
43047	99	25	23,2	cyclictest	4188967	-21	kworker/u16:0+events_unbound	07:44:00	6
43047	99	25	23,2	cyclictest	4188967	-21	kworker/u16:0+events_unbound	07:17:29	6
43047	99	25	23,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	09:01:49	6
43047	99	25	23,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	09:01:49	6
43047	99	25	23,2	cyclictest	3523582	-21	kworker/u16:3+events_unbound	07:53:38	6
43047	99	25	23,2	cyclictest	152632	-21	kworker/u16:5+flush-8:0	08:36:41	6
43042	99	25	23,2	cyclictest	104838	-21	kworker/u16:1+events_unbound	08:06:44	5
43047	99	24	22,2	cyclictest	42814	-21	kworker/u16:1+events_unbound	07:12:44	6
43047	99	24	22,2	cyclictest	192319	-21	kworker/u16:0+events_unbound	08:55:45	6
43042	99	24	22,2	cyclictest	709375	-21	kworker/u16:2+events_unbound	12:25:44	5
43038	99	24	22,2	cyclictest	152632	-21	kworker/u16:5+events_unbound	08:36:28	4
43049	99	23	0,22	cyclictest	291408	-21	latency_hist	09:11:14	7
43049	99	23	0,22	cyclictest	124	-21	kswapd0	12:31:13	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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