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 Jan 16, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2810267	2	99	0,1	sleep7	2810268	-21	ssh	21:43:19	7
2479685	2	71	61,7	sleep4	0	-21	swapper/4	19:03:47	4
2480248	99	50	44,5	cyclictest	2618901	-21	latency_hist	20:17:39	7
2480248	99	46	40,5	cyclictest	650	-21	systemd-journal	00:37:39	7
2479809	2	44	10,30	sleep7	0	-21	swapper/7	19:05:34	7
6265	89	40	0,33	rtkit-daemon	0	-21	swapper/6	19:05:52	6
2480248	99	39	33,5	cyclictest	2676725	-21	latency_hist	20:47:40	7
2480239	99	39	37,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	22:49:53	4
2470755	2	39	29,7	sleep5	0	-21	swapper/5	19:02:44	5
2480248	99	38	0,37	cyclictest	3213572	-21	latency_hist	00:32:39	7
2480239	99	37	35,2	cyclictest	3201484	-21	kworker/u16:1+events_unbound	00:32:29	4
2480239	99	37	35,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	23:09:57	4
2480239	99	37	35,2	cyclictest	2898246	-21	kworker/u16:2+events_unbound	22:25:45	4
2480239	99	36	34,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	23:35:08	4
2480239	99	36	34,2	cyclictest	2696163	-21	kworker/u16:3+flush-8:0	22:17:36	4
2480248	99	35	30,4	cyclictest	3007055	-21	latency_hist	23:07:39	7
2480248	99	35	30,4	cyclictest	3007055	-21	latency_hist	23:07:39	7
2480239	99	35	33,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	22:59:32	4
2480239	99	35	33,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	00:02:08	4
2480239	99	35	33,2	cyclictest	2922224	-21	kworker/u16:1+events_unbound	22:53:56	4
2480239	99	35	33,2	cyclictest	2922224	-21	kworker/u16:1+events_unbound	22:46:59	4
2480239	99	35	33,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	23:42:08	4
2480239	99	35	33,2	cyclictest	2752229	-21	kworker/u16:2+flush-8:0	21:50:49	4
2480239	99	35	32,2	cyclictest	2561249	-21	kworker/u16:3+events_unbound	19:47:41	4
2480248	99	34	33,0	cyclictest	0	-21	swapper/7	21:49:52	7
2480244	99	34	31,2	cyclictest	2992569	-21	kworker/u16:2+flush-8:0	23:27:49	6
2480239	99	34	32,2	cyclictest	2774670	-21	kworker/u16:0+events_unbound	21:44:21	4
2480248	99	33	32,0	cyclictest	0	-21	swapper/7	22:27:11	7
2480239	99	33	31,2	cyclictest	2835821	-21	kworker/u16:4+flush-8:0	21:55:52	4
2480239	99	33	31,2	cyclictest	2752229	-21	kworker/u16:2+events_unbound	21:37:29	4
2480239	99	33	31,2	cyclictest	2738868	-21	kworker/u16:0+events_unbound	21:20:35	4
2480239	99	33	31,2	cyclictest	2696163	-21	kworker/u16:3+events_unbound	22:18:55	4
2480239	99	33	31,2	cyclictest	2696163	-21	kworker/u16:3+events_unbound	22:18:55	4
2480239	99	32	30,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	23:29:30	4
2480239	99	32	30,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	23:26:16	4
2480239	99	32	30,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	23:54:54	4
2480239	99	32	30,2	cyclictest	2898246	-21	kworker/u16:2+events_unbound	22:34:00	4
2480239	99	32	29,2	cyclictest	2618940	-21	kworker/u16:1+events_unbound	21:08:41	4
2480239	99	31	29,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	23:20:36	4
2480239	99	31	29,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	00:03:24	4
2480239	99	31	29,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	23:07:35	4
2480239	99	31	29,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	23:07:35	4
2480239	99	31	29,2	cyclictest	2898246	-21	kworker/u16:2+events_unbound	22:39:24	4
2480239	99	31	29,2	cyclictest	2752229	-21	kworker/u16:2+events_unbound	21:25:16	4
2480239	99	31	28,2	cyclictest	3152398	-21	kworker/u16:1+events_unbound	00:12:47	4
2480239	99	30	28,2	cyclictest	3113865	-21	kworker/u16:1+events_unbound	23:50:11	4
2480239	99	30	28,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	00:25:51	4
2480239	99	30	28,2	cyclictest	2992569	-21	kworker/u16:2+events_unbound	00:12:26	4
2480239	99	30	28,2	cyclictest	2738868	-21	kworker/u16:0+events_unbound	21:17:13	4
2480239	99	30	28,2	cyclictest	2696163	-21	kworker/u16:3+events_unbound	22:10:52	4
2480239	99	30	28,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	20:19:50	4
2480239	99	30	28,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	19:55:50	4
2480248	99	29	28,0	cyclictest	0	-21	swapper/7	23:57:55	7
2480248	99	29	28,0	cyclictest	0	-21	swapper/7	21:27:17	7
2480248	99	29	24,4	cyclictest	650	-21	systemd-journal	22:32:39	7
2480243	99	29	27,2	cyclictest	3165088	-21	kworker/u16:0+flush-8:0	00:28:04	5
2480239	99	29	27,2	cyclictest	3165090	-21	kworker/u16:4+events_unbound	00:21:23	4
2480239	99	29	27,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	22:28:18	4
2480239	99	29	27,2	cyclictest	2774670	-21	kworker/u16:0+events_unbound	22:01:23	4
2480239	99	29	27,2	cyclictest	2396364	-21	kworker/u16:4+events_unbound	19:26:50	4
2480244	99	28	26,2	cyclictest	2922224	-21	kworker/u16:1+flush-8:0	22:48:10	6
2480239	99	28	26,2	cyclictest	3201484	-21	kworker/u16:1+events_unbound	00:33:59	4
2480239	99	28	26,2	cyclictest	2752229	-21	kworker/u16:2+flush-8:0	21:28:17	4
2480239	99	28	25,2	cyclictest	2580358	-21	kworker/u16:4+events_unbound	20:22:42	4
2480239	99	27	25,2	cyclictest	2898247	-21	kworker/u16:5+events_unbound	23:44:23	4
2480239	99	27	25,2	cyclictest	2835821	-21	kworker/u16:4+events_unbound	22:06:28	4
2480239	99	27	25,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	19:45:42	4
2480239	99	27	25,2	cyclictest	2451615	-21	kworker/u16:0+events_unbound	20:12:09	4
2480239	99	26	24,2	cyclictest	2696163	-21	kworker/u16:3+events_unbound	21:39:32	4
2480239	99	26	24,2	cyclictest	2493941	-21	kworker/u16:1+events_unbound	19:18:42	4
2480243	99	25	23,2	cyclictest	2396364	-21	kworker/u16:4+events_unbound	19:07:55	5
2480239	99	25	23,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	19:36:58	4
2480239	99	25	23,2	cyclictest	2493941	-21	kworker/u16:1+events_unbound	19:17:22	4
2480239	99	25	23,2	cyclictest	2396364	-21	kworker/u16:4+events_unbound	19:12:34	4
2480248	99	24	23,0	cyclictest	0	-21	swapper/7	21:59:08	7
2480248	99	24	23,0	cyclictest	0	-21	swapper/7	21:39:34	7
2480243	99	24	23,1	cyclictest	2922224	-21	kworker/u16:1+events_unbound	22:41:02	5
2480239	99	24	22,2	cyclictest	2676765	-21	kworker/u16:4+events_unbound	20:49:46	4
2480239	99	24	22,2	cyclictest	2580358	-21	kworker/u16:4+events_unbound	20:29:58	4
2480239	99	24	22,2	cyclictest	2532535	-21	kworker/u16:1+events_unbound	19:39:13	4
2480239	99	24	22,2	cyclictest	2396364	-21	kworker/u16:4+events_unbound	19:31:42	4
2994473	2	23	0,1	chrt	2994471	-21	ssh	23:01:48	7
2480248	99	23	22,0	cyclictest	0	-21	swapper/7	21:14:18	7
2480248	99	23	22,0	cyclictest	0	-21	swapper/7	19:34:17	7
2480244	99	23	20,2	cyclictest	2898247	-21	kworker/u16:5+flush-8:0	23:52:44	6
2480243	99	23	20,2	cyclictest	2580358	-21	kworker/u16:4+events_unbound	20:02:54	5
2480239	99	23	21,2	cyclictest	2922224	-21	kworker/u16:1+events_unbound	23:15:47	4
2480239	99	23	21,2	cyclictest	2580358	-21	kworker/u16:4+events_unbound	20:02:34	4
2480239	99	23	21,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	20:56:46	4
2480239	99	23	21,2	cyclictest	2451615	-21	kworker/u16:0+events_unbound	20:04:02	4
2480248	99	22	21,0	cyclictest	0	-21	swapper/7	22:49:18	7
2480248	99	22	21,0	cyclictest	0	-21	swapper/7	22:08:17	7
2480248	99	22	21,0	cyclictest	0	-21	swapper/7	21:18:22	7
2480248	99	22	21,0	cyclictest	0	-21	swapper/7	19:30:45	7
2480239	99	22	20,2	cyclictest	2686774	-21	kworker/u16:0+events_unbound	21:02:36	4
2480239	99	22	20,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	20:38:02	4
2480239	99	22	20,2	cyclictest	2512947	-21	kworker/u16:2+events_unbound	20:13:45	4
2480248	99	21	21,0	cyclictest	0	-21	swapper/7	21:33:15	7
2480248	99	21	20,0	cyclictest	0	-21	swapper/7	19:09:33	7
2480243	99	21	19,2	cyclictest	2922224	-21	kworker/u16:1+flush-8:0	22:53:17	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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