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 Wed Nov 26, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1152448	2	57	47,7	sleep4	0	-21	swapper/4	15:19:10	4
1152458	2	56	46,7	sleep5	0	-21	swapper/5	15:19:19	5
1153114	99	52	46,5	cyclictest	1439720	-21	latency_hist	17:43:15	7
1153114	99	48	42,5	cyclictest	1631309	-21	latency_hist	19:18:15	7
1152554	2	46	11,31	sleep7	0	-21	swapper/7	15:20:41	7
1153110	99	44	42,2	cyclictest	1298002	-21	kworker/u16:4+flush-8:0	16:29:50	6
1153104	99	41	39,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	16:08:40	4
1153106	99	40	37,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	16:08:41	5
1153106	99	39	37,2	cyclictest	1409361	-21	kworker/u16:0+events_unbound	17:30:06	5
1153106	99	39	35,3	cyclictest	1601417	-21	kworker/u16:5+flush-8:0	19:08:05	5
1153110	99	37	35,2	cyclictest	1123014	-21	kworker/u16:2+events_unbound	16:08:44	6
1153110	99	37	34,3	cyclictest	1550724	-21	kworker/u16:0+flush-8:0	19:08:30	6
1153104	99	37	35,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	15:42:31	4
1152429	2	37	26,8	sleep6	0	-21	swapper/6	15:18:56	6
1153104	99	36	34,2	cyclictest	1429586	-21	kworker/u16:4+events_unbound	17:57:06	4
1153114	99	35	8,25	cyclictest	27759	-21	gdbus	15:39:00	7
1153106	99	35	33,2	cyclictest	1782331	-21	kworker/u16:2+events_unbound	20:35:06	5
1153106	99	35	33,2	cyclictest	1429586	-21	kworker/u16:4+events_unbound	17:41:04	5
1153104	99	35	33,2	cyclictest	1368995	-21	kworker/u16:1+flush-8:0	17:33:19	4
1153104	99	35	33,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:00:04	4
1153110	99	34	32,2	cyclictest	1368995	-21	kworker/u16:1+flush-8:0	17:59:15	6
1153110	99	34	31,2	cyclictest	1429586	-21	kworker/u16:4+events_unbound	18:08:16	6
1153106	99	34	32,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	19:58:06	5
1153106	99	34	32,2	cyclictest	1550725	-21	kworker/u16:4+events_unbound	18:41:06	5
1153106	99	34	32,2	cyclictest	1102825	-21	kworker/u16:0+events_unbound	16:36:04	5
1153104	99	34	32,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	17:52:03	4
1153104	99	34	32,2	cyclictest	1267960	-21	kworker/u16:3+events_unbound	17:07:47	4
1153104	99	34	31,2	cyclictest	1162759	-21	kworker/u16:3+events_unbound	15:33:18	4
1153114	99	33	27,5	cyclictest	589235	-21	systemd-journal	18:23:31	7
1153106	99	33	31,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	20:18:14	5
1153106	99	33	31,2	cyclictest	1580574	-21	kworker/u16:1+events_unbound	19:14:14	5
1153106	99	33	31,2	cyclictest	1550724	-21	kworker/u16:0+flush-8:0	18:53:47	5
1153106	99	33	31,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:22:56	5
1153104	99	33	31,2	cyclictest	1722145	-21	kworker/u16:4+events_unbound	20:39:18	4
1153104	99	33	31,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	15:26:01	4
1153104	99	33	30,2	cyclictest	1162759	-21	kworker/u16:3+flush-8:0	15:53:30	4
1153114	99	32	27,4	cyclictest	1691814	-21	latency_hist	19:48:15	7
1153110	99	32	30,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	17:27:06	6
1153110	99	32	30,2	cyclictest	1102825	-21	kworker/u16:0+events_unbound	16:23:29	6
1153110	99	32	28,3	cyclictest	1368995	-21	kworker/u16:1+flush-8:0	18:33:33	6
1153106	99	32	30,2	cyclictest	1722145	-21	kworker/u16:4+events_unbound	20:26:30	5
1153106	99	32	30,2	cyclictest	1429586	-21	kworker/u16:4+events_unbound	17:44:43	5
1153104	99	32	30,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	20:19:50	4
1153104	99	32	30,2	cyclictest	1580574	-21	kworker/u16:1+events_unbound	19:35:18	4
1153104	99	32	30,2	cyclictest	1358914	-21	kworker/u16:2+flush-8:0	18:23:47	4
1153104	99	32	30,2	cyclictest	1267960	-21	kworker/u16:3+events_unbound	17:12:03	4
1153114	99	31	30,0	cyclictest	0	-21	swapper/7	20:30:02	7
1153114	99	31	30,0	cyclictest	0	-21	swapper/7	17:27:57	7
1153114	99	31	30,0	cyclictest	0	-21	swapper/7	17:08:10	7
1153114	99	31	25,5	cyclictest	1500295	-21	latency_hist	18:13:15	7
1153110	99	31	29,2	cyclictest	1701736	-21	kworker/u16:3+flush-8:0	20:09:58	6
1153110	99	31	29,2	cyclictest	1550724	-21	kworker/u16:0+events_unbound	19:07:19	6
1153110	99	31	29,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:25:50	6
1153110	99	31	29,2	cyclictest	1123014	-21	kworker/u16:2+events_unbound	16:19:39	6
1153106	99	31	29,2	cyclictest	1550725	-21	kworker/u16:4+events_unbound	18:51:06	5
1153106	99	31	29,2	cyclictest	1550724	-21	kworker/u16:0+flush-8:0	19:10:06	5
1153106	99	31	29,2	cyclictest	1409361	-21	kworker/u16:0+events_unbound	17:37:27	5
1153106	99	31	29,2	cyclictest	1358914	-21	kworker/u16:2+events_unbound	18:23:46	5
1153106	99	31	29,2	cyclictest	1123014	-21	kworker/u16:2+events_unbound	16:25:07	5
1153104	99	31	29,2	cyclictest	1701736	-21	kworker/u16:3+flush-8:0	20:10:04	4
1153104	99	31	29,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	20:17:05	4
1153104	99	31	29,2	cyclictest	1631074	-21	kworker/u16:2+events_unbound	19:15:26	4
1153104	99	31	29,2	cyclictest	1550725	-21	kworker/u16:4+events_unbound	18:42:03	4
1153104	99	31	29,2	cyclictest	1429586	-21	kworker/u16:4+flush-8:0	18:05:34	4
1153104	99	31	29,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:19:11	4
1153114	99	30	29,0	cyclictest	0	-21	swapper/7	18:54:27	7
1153114	99	30	29,0	cyclictest	0	-21	swapper/7	16:40:39	7
1153114	99	30	29,0	cyclictest	0	-21	swapper/7	16:07:35	7
1153110	99	30	28,2	cyclictest	1722145	-21	kworker/u16:4+flush-8:0	20:46:04	6
1153110	99	30	28,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	20:01:18	6
1153110	99	30	28,2	cyclictest	1701561	-21	kworker/u16:0+events_unbound	20:16:26	6
1153110	99	30	28,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:07:53	6
1153110	99	30	28,2	cyclictest	1358914	-21	kworker/u16:2+events_unbound	18:20:23	6
1153110	99	30	28,2	cyclictest	1358914	-21	kworker/u16:2+events_unbound	17:35:50	6
1153110	99	30	28,2	cyclictest	1328412	-21	kworker/u16:1+events_unbound	16:55:50	6
1153106	99	30	28,2	cyclictest	1701736	-21	kworker/u16:3+events_unbound	20:10:03	5
1153106	99	30	28,2	cyclictest	1580574	-21	kworker/u16:1+flush-8:0	19:37:14	5
1153106	99	30	28,2	cyclictest	1580574	-21	kworker/u16:1+events_unbound	19:33:03	5
1153106	99	30	28,2	cyclictest	1368995	-21	kworker/u16:1+flush-8:0	17:58:44	5
1153106	99	30	28,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:31:06	5
1153106	99	30	28,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	18:07:49	5
1153106	99	30	28,2	cyclictest	1368995	-21	kworker/u16:1+events_unbound	17:52:17	5
1153106	99	30	28,2	cyclictest	1123014	-21	kworker/u16:2+events_unbound	16:16:39	5
1153104	99	30	28,2	cyclictest	1631074	-21	kworker/u16:2+flush-8:0	19:57:14	4
1153104	99	30	28,2	cyclictest	1550724	-21	kworker/u16:0+events_unbound	18:47:27	4
1153104	99	30	28,2	cyclictest	1530450	-21	kworker/u16:3+events_unbound	18:28:51	4
1153114	99	29	24,4	cyclictest	1297922	-21	fwupd	16:29:40	7
1153114	99	29	23,5	cyclictest	1459987	-21	latency_hist	17:53:15	7
1153110	99	29	27,2	cyclictest	1550724	-21	kworker/u16:0+flush-8:0	18:56:25	6
1153110	99	29	27,2	cyclictest	1358914	-21	kworker/u16:2+events_unbound	17:20:06	6
1153110	99	29	27,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	16:04:00	6
1153110	99	29	27,2	cyclictest	1102825	-21	kworker/u16:0+events_unbound	16:16:19	6
1153106	99	29	27,2	cyclictest	1701561	-21	kworker/u16:0+events_unbound	20:07:13	5
1153106	99	29	27,2	cyclictest	1631074	-21	kworker/u16:2+flush-8:0	19:52:55	5
1153106	99	29	27,2	cyclictest	1267960	-21	kworker/u16:3+flush-8:0	17:15:24	5
1153106	99	29	27,2	cyclictest	1267960	-21	kworker/u16:3+events_unbound	16:59:05	5
1153104	99	29	27,2	cyclictest	1722145	-21	kworker/u16:4+events_unbound	20:24:11	4
1153104	99	29	27,2	cyclictest	1631074	-21	kworker/u16:2+events_unbound	19:21:49	4
1153104	99	29	27,2	cyclictest	1580574	-21	kworker/u16:1+flush-8:0	19:32:26	4
1153104	99	29	27,2	cyclictest	1102825	-21	kworker/u16:0+flush-8:0	16:42:07	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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