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 04, 2026 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
91752	2	146	0,1	sleep7	91756	-21	kthreadcore	20:18:49	7
19875	2	64	0,0	sleep6	0	-21	swapper/6	19:38:58	6
4143208	99	49	43,5	cyclictest	272058	-21	latency_hist	21:53:30	7
4142641	2	43	32,8	sleep4	0	-21	swapper/4	19:04:59	4
34243	2	43	0,1	chrt	0	-21	swapper/4	19:48:49	4
4142881	2	42	32,7	sleep5	0	-21	swapper/5	19:08:21	5
4141996	2	42	29,8	sleep6	0	-21	swapper/6	19:04:05	6
4143205	99	40	38,2	cyclictest	436521	-21	kworker/u16:4+events_unbound	00:08:44	6
4143208	99	39	33,5	cyclictest	650	-21	systemd-journal	20:18:30	7
4143205	99	39	36,2	cyclictest	253109	-21	kworker/u16:0+flush-8:0	21:48:44	6
4143205	99	38	36,2	cyclictest	426879	-21	kworker/u16:2+flush-8:0	23:33:45	6
4143205	99	38	36,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	21:53:43	6
4142607	2	38	3,31	sleep7	0	-21	swapper/7	19:04:30	7
4143205	99	37	34,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	23:03:45	6
4143205	99	36	34,2	cyclictest	426879	-21	kworker/u16:2+flush-8:0	23:23:29	6
4143205	99	36	33,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	20:43:44	6
4143205	99	36	33,2	cyclictest	4133279	-21	kworker/u16:5+events_unbound	19:33:44	6
4143205	99	36	33,2	cyclictest	175492	-21	kworker/u16:3+events_unbound	21:28:29	6
4143198	99	36	33,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	20:38:50	4
4143198	99	36	33,2	cyclictest	543091	-21	kworker/u16:2+flush-8:0	00:13:45	4
4143198	99	36	33,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:43:30	4
4143198	99	36	33,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:43:30	4
4143205	99	35	32,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	22:28:48	6
4143205	99	35	32,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	22:28:48	6
4143202	99	35	33,2	cyclictest	563380	-21	kworker/u16:2+events_unbound	00:24:04	5
4143205	99	34	32,2	cyclictest	88775	-21	kworker/u16:1+flush-8:0	21:08:30	6
4143205	99	34	31,2	cyclictest	436521	-21	kworker/u16:4+events_unbound	23:43:45	6
4143198	99	34	31,2	cyclictest	146671	-21	kworker/u16:2+flush-8:0	20:58:44	4
4143205	99	33	31,2	cyclictest	4060431	-21	kworker/u16:4+events_unbound	20:03:30	6
4143205	99	33	31,2	cyclictest	253109	-21	kworker/u16:0+events_unbound	21:43:47	6
4143205	99	33	30,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	19:19:00	6
4143202	99	33	31,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	20:53:54	5
4143202	99	33	31,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	20:53:54	5
4143198	99	33	30,2	cyclictest	4060431	-21	kworker/u16:4+events_unbound	19:18:45	4
4143198	99	33	29,3	cyclictest	175492	-21	kworker/u16:3+flush-8:0	22:08:45	4
4143205	99	32	30,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	22:43:59	6
4143205	99	32	30,2	cyclictest	146671	-21	kworker/u16:2+events_unbound	20:48:54	6
4143205	99	32	29,2	cyclictest	514209	-21	kworker/u16:1+events_unbound	00:18:44	6
4143205	99	32	29,2	cyclictest	11595	-21	kworker/u16:1+events_unbound	19:54:01	6
4143202	99	32	30,2	cyclictest	493538	-21	kworker/u16:0+events_unbound	00:18:09	5
4143198	99	32	30,2	cyclictest	493538	-21	kworker/u16:0+flush-8:0	00:33:45	4
4143198	99	32	30,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	19:58:30	4
4143198	99	32	29,2	cyclictest	253109	-21	kworker/u16:0+events_unbound	21:43:45	4
4143205	99	31	29,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	20:18:43	6
4143205	99	31	29,2	cyclictest	514209	-21	kworker/u16:1+flush-8:0	00:13:49	6
4143205	99	31	28,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	22:19:12	6
4143202	99	31	29,2	cyclictest	436521	-21	kworker/u16:4+flush-8:0	00:08:58	5
4143202	99	31	29,2	cyclictest	340028	-21	kworker/u16:0+flush-8:0	22:38:58	5
4143202	99	31	29,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	22:28:58	5
4143202	99	31	29,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	22:28:58	5
4143202	99	31	28,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	20:13:58	5
4143205	99	30	28,2	cyclictest	426879	-21	kworker/u16:2+flush-8:0	23:53:30	6
4143205	99	30	28,2	cyclictest	417533	-21	kworker/u16:0+events_unbound	23:08:52	6
4143205	99	30	28,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	20:13:56	6
4143205	99	30	28,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	19:13:25	6
4143205	99	30	27,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	22:28:25	6
4143202	99	30	28,2	cyclictest	580844	-21	kworker/u16:1+events_unbound	00:33:43	5
4143202	99	30	28,2	cyclictest	146671	-21	kworker/u16:2+events_unbound	20:52:29	5
4143202	99	30	28,2	cyclictest	11595	-21	kworker/u16:1+flush-8:0	19:58:53	5
4143202	99	30	27,2	cyclictest	426879	-21	kworker/u16:2+flush-8:0	23:28:40	5
4143202	99	30	26,3	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:58:56	5
4143198	99	30	28,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	19:28:30	4
4143198	99	30	27,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	21:59:00	4
221107	2	30	0,1	sleep4	0	-21	swapper/4	21:23:52	4
4143205	99	29	27,2	cyclictest	4060431	-21	kworker/u16:4+events_unbound	19:52:41	6
4143205	99	29	26,2	cyclictest	4133279	-21	kworker/u16:5+flush-8:0	20:03:52	6
4143205	99	29	26,2	cyclictest	4133279	-21	kworker/u16:5+flush-8:0	20:03:52	6
4143205	99	29	26,2	cyclictest	253109	-21	kworker/u16:0+events_unbound	21:58:31	6
4143205	99	29	26,2	cyclictest	195162	-21	kworker/u16:4+flush-8:0	22:48:44	6
4143202	99	29	27,2	cyclictest	4133279	-21	kworker/u16:5+events_unbound	19:43:52	5
4143202	99	29	27,2	cyclictest	282804	-21	kworker/u16:5+events_unbound	22:15:41	5
4143202	99	29	26,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	20:43:32	5
4143202	99	29	26,2	cyclictest	426879	-21	kworker/u16:2+events_unbound	23:18:58	5
4143202	99	29	26,2	cyclictest	4060431	-21	kworker/u16:4+events_unbound	19:23:34	5
4143198	99	29	27,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	21:28:56	4
4143198	99	29	27,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:38:24	4
4143198	99	29	26,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	20:53:44	4
4143198	99	29	26,2	cyclictest	59432	-21	kworker/u16:0+events_unbound	20:53:44	4
4143198	99	29	26,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	22:38:30	4
4143205	99	28	26,2	cyclictest	2667662	-21	kworker/u16:3+flush-8:0	19:13:45	6
4143202	99	28	26,2	cyclictest	436521	-21	kworker/u16:4+events_unbound	23:42:33	5
4143202	99	28	25,2	cyclictest	493538	-21	kworker/u16:0+events_unbound	23:53:49	5
4143202	99	28	25,2	cyclictest	426879	-21	kworker/u16:2+events_unbound	23:48:52	5
4143202	99	28	25,2	cyclictest	4060431	-21	kworker/u16:4+flush-8:0	19:30:46	5
4143198	99	28	27,1	cyclictest	59432	-21	kworker/u16:0+events_unbound	21:11:09	4
4143198	99	28	26,2	cyclictest	282804	-21	kworker/u16:5+events_unbound	22:23:24	4
4143198	99	28	26,2	cyclictest	195162	-21	kworker/u16:4+flush-8:0	22:38:48	4
4143205	99	27	25,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	21:08:56	6
4143205	99	27	25,2	cyclictest	195162	-21	kworker/u16:4+events_unbound	22:43:24	6
4143205	99	27	25,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:38:45	6
4143205	99	27	25,2	cyclictest	175492	-21	kworker/u16:3+flush-8:0	21:38:45	6
4143202	99	27	25,2	cyclictest	467099	-21	kworker/u16:1+events_unbound	23:37:41	5
4143202	99	27	25,2	cyclictest	175492	-21	kworker/u16:3+events_unbound	23:01:40	5
4143202	99	27	25,2	cyclictest	11595	-21	kworker/u16:1+events_unbound	19:58:13	5
4143202	99	27	24,2	cyclictest	426879	-21	kworker/u16:2+events_unbound	23:15:29	5
4143202	99	27	24,2	cyclictest	4133279	-21	kworker/u16:5+events_unbound	20:08:47	5
4143202	99	27	24,2	cyclictest	175492	-21	kworker/u16:3+events_unbound	21:17:30	5
4143205	99	26	25,1	cyclictest	514209	-21	kworker/u16:1+events_unbound	00:01:09	6
4143205	99	26	24,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	20:53:45	6
4143205	99	26	24,2	cyclictest	59432	-21	kworker/u16:0+flush-8:0	20:53:45	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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