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 Sun Jan 11, 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
3967748	2	55	21,30	sleep7	0	-21	swapper/7	19:06:19	7
3968149	99	46	44,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	21:53:02	5
3968157	99	45	40,4	cyclictest	650	-21	systemd-journal	20:38:02	7
3968154	99	40	38,2	cyclictest	411315	-21	kworker/u16:3+events_unbound	23:52:03	6
3968149	99	40	38,2	cyclictest	4078277	-21	kworker/u16:1+events_unbound	21:08:03	5
3967635	2	39	29,7	sleep6	0	-21	swapper/6	19:04:41	6
3968149	99	38	36,2	cyclictest	178873	-21	kworker/u16:0+flush-8:0	22:33:02	5
3967595	2	38	28,7	sleep5	0	-21	swapper/5	19:04:08	5
3968154	99	37	35,2	cyclictest	340127	-21	kworker/u16:2+events_unbound	23:40:00	6
3968154	99	37	35,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:57:00	6
3968154	99	37	35,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:36:31	6
3968154	99	37	35,2	cyclictest	191763	-21	kworker/u16:5+events_unbound	22:49:23	6
3968149	99	37	36,1	cyclictest	340127	-21	kworker/u16:2+events_unbound	23:25:56	5
3968149	99	37	36,1	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:53:04	5
3967860	2	37	11,8	sleep4	0	-21	swapper/4	19:07:52	4
3968154	99	36	34,2	cyclictest	425426	-21	kworker/u16:4+events_unbound	00:21:20	6
3968154	99	36	34,2	cyclictest	278863	-21	kworker/u16:2+events_unbound	23:09:39	6
3968154	99	36	34,2	cyclictest	191763	-21	kworker/u16:5+flush-8:0	23:15:39	6
3968154	99	36	34,2	cyclictest	131317	-21	kworker/u16:4+events_unbound	22:29:39	6
3968154	99	35	32,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	21:28:07	6
3968149	99	35	33,2	cyclictest	4078277	-21	kworker/u16:1+flush-8:0	20:53:20	5
3968149	99	35	33,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:57:59	5
3968154	99	34	32,2	cyclictest	425426	-21	kworker/u16:4+flush-8:0	00:08:39	6
3968154	99	34	32,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	21:47:32	6
3968154	99	34	32,2	cyclictest	291455	-21	kworker/u16:1+flush-8:0	23:44:20	6
3968154	99	34	32,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:47:04	6
3968154	99	34	32,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:39:11	6
3968154	99	34	32,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:39:11	6
3968154	99	34	32,2	cyclictest	131317	-21	kworker/u16:4+events_unbound	22:05:07	6
3968154	99	34	32,2	cyclictest	10967	-21	kworker/u16:3+events_unbound	21:42:56	6
3968149	99	34	32,2	cyclictest	83732	-21	kworker/u16:1+events_unbound	21:58:56	5
3968149	99	34	32,2	cyclictest	425426	-21	kworker/u16:4+events_unbound	00:29:11	5
3968149	99	34	32,2	cyclictest	3904214	-21	kworker/u16:0+events_unbound	19:13:03	5
3968147	99	34	32,2	cyclictest	291455	-21	kworker/u16:1+flush-8:0	23:34:03	4
3968157	99	33	32,0	cyclictest	0	-21	swapper/7	22:25:07	7
3968157	99	33	32,0	cyclictest	0	-21	swapper/7	00:04:14	7
3968154	99	33	31,2	cyclictest	83732	-21	kworker/u16:1+flush-8:0	21:59:43	6
3968154	99	33	31,2	cyclictest	4058628	-21	kworker/u16:0+flush-8:0	20:33:32	6
3968154	99	33	31,2	cyclictest	314255	-21	kworker/u16:0+events_unbound	23:29:48	6
3968149	99	33	31,2	cyclictest	425426	-21	kworker/u16:4+events_unbound	00:18:57	5
3968147	99	33	31,2	cyclictest	19730	-21	kworker/u16:5+events_unbound	21:33:24	4
3968157	99	32	31,0	cyclictest	0	-21	swapper/7	23:21:14	7
3968157	99	32	31,0	cyclictest	0	-21	swapper/7	23:21:14	7
3968154	99	32	30,2	cyclictest	83732	-21	kworker/u16:1+events_unbound	21:56:31	6
3968154	99	32	30,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:27:30	6
3968154	99	32	30,2	cyclictest	191763	-21	kworker/u16:5+events_unbound	22:23:00	6
3968154	99	32	30,2	cyclictest	10967	-21	kworker/u16:3+flush-8:0	21:34:07	6
3968154	99	32	29,2	cyclictest	425028	-21	kworker/u16:0+events_unbound	00:23:06	6
3968157	99	31	30,0	cyclictest	0	-21	swapper/7	22:32:31	7
3968154	99	31	29,2	cyclictest	83732	-21	kworker/u16:1+events_unbound	21:49:23	6
3968154	99	31	29,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	21:16:35	6
3968154	99	31	29,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	20:14:13	6
3968154	99	31	29,2	cyclictest	278863	-21	kworker/u16:2+flush-8:0	23:06:26	6
3968154	99	31	29,2	cyclictest	129268	-21	kworker/u16:2+flush-8:0	22:13:50	6
3968154	99	31	28,2	cyclictest	425028	-21	kworker/u16:0+events_unbound	00:33:06	6
3968154	99	31	28,2	cyclictest	411315	-21	kworker/u16:3+events_unbound	23:58:03	6
3968154	99	31	28,2	cyclictest	4058628	-21	kworker/u16:0+flush-8:0	21:08:10	6
3968149	99	31	29,2	cyclictest	228380	-21	kworker/u16:1+events_unbound	22:43:00	5
3968149	99	31	29,2	cyclictest	228380	-21	kworker/u16:1+events_unbound	22:43:00	5
3968149	99	31	29,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	23:02:44	5
3968149	99	31	29,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:48:32	5
3968149	99	31	29,2	cyclictest	131317	-21	kworker/u16:4+events_unbound	22:13:04	5
3968147	99	31	29,2	cyclictest	178873	-21	kworker/u16:0+events_unbound	22:28:32	4
3968157	99	30	29,0	cyclictest	0	-21	swapper/7	00:15:59	7
3968154	99	30	28,2	cyclictest	425028	-21	kworker/u16:0+flush-8:0	00:16:14	6
3968154	99	30	28,2	cyclictest	4078277	-21	kworker/u16:1+events_unbound	20:52:12	6
3968154	99	30	28,2	cyclictest	3844074	-21	kworker/u16:5+flush-8:0	19:53:36	6
3968154	99	30	28,2	cyclictest	191763	-21	kworker/u16:5+events_unbound	23:00:26	6
3968154	99	30	28,2	cyclictest	129268	-21	kworker/u16:2+events_unbound	22:12:15	6
3968154	99	30	27,3	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:22:25	6
3968154	99	30	27,3	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:22:25	6
3968149	99	30	28,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	20:08:02	5
3968149	99	30	28,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:07:12	5
3968149	99	30	28,2	cyclictest	19730	-21	kworker/u16:5+events_unbound	21:32:29	5
3968149	99	30	28,2	cyclictest	191763	-21	kworker/u16:5+flush-8:0	23:20:16	5
3968149	99	30	28,2	cyclictest	191763	-21	kworker/u16:5+flush-8:0	23:20:16	5
3968149	99	30	28,2	cyclictest	10967	-21	kworker/u16:3+events_unbound	21:36:29	5
3968154	99	29	27,2	cyclictest	425469	-21	kworker/u16:5+flush-8:0	00:04:38	6
3968154	99	29	27,2	cyclictest	4078277	-21	kworker/u16:1+events_unbound	20:38:35	6
3968154	99	29	27,2	cyclictest	3844074	-21	kworker/u16:5+events_unbound	20:53:26	6
3968154	99	29	27,2	cyclictest	3844074	-21	kworker/u16:5+events_unbound	20:20:36	6
3968154	99	29	27,2	cyclictest	19730	-21	kworker/u16:5+events_unbound	21:19:18	6
3968154	99	29	27,2	cyclictest	10967	-21	kworker/u16:3+events_unbound	21:27:50	6
3968149	99	29	27,2	cyclictest	425028	-21	kworker/u16:0+events_unbound	00:36:56	5
3968149	99	29	27,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:45:44	5
3968149	99	29	27,2	cyclictest	291455	-21	kworker/u16:1+events_unbound	23:38:24	5
3968149	99	29	27,2	cyclictest	19730	-21	kworker/u16:5+events_unbound	21:21:48	5
3968149	99	29	27,2	cyclictest	131317	-21	kworker/u16:4+events_unbound	22:26:00	5
3968147	99	29	27,2	cyclictest	228380	-21	kworker/u16:1+events_unbound	22:47:57	4
3968157	99	28	27,1	cyclictest	362737	-21	ssh	23:30:31	7
3968157	99	28	27,0	cyclictest	0	-21	swapper/7	19:57:24	7
3968157	99	28	25,2	cyclictest	96	-21	ksoftirqd/7	22:04:14	7
3968154	99	28	26,2	cyclictest	4058628	-21	kworker/u16:0+events_unbound	20:11:13	6
3968154	99	28	26,2	cyclictest	254566	-21	kworker/u16:3+events_unbound	22:55:50	6
3968154	99	28	26,2	cyclictest	228380	-21	kworker/u16:1+events_unbound	22:35:15	6
3968154	99	28	26,2	cyclictest	131317	-21	kworker/u16:4+events_unbound	22:26:19	6
3968149	99	28	26,2	cyclictest	425469	-21	kworker/u16:5+events_unbound	00:09:44	5
3968149	99	28	26,2	cyclictest	425028	-21	kworker/u16:0+events_unbound	00:15:36	5
3968149	99	28	26,2	cyclictest	129268	-21	kworker/u16:2+flush-8:0	21:53:44	5
3968149	99	28	26,2	cyclictest	129268	-21	kworker/u16:2+events_unbound	22:08:21	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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