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 Thu May 28, 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
2274384	2	55	45,7	sleep4	0	-21	swapper/4	07:07:00	4
2274695	99	41	36,4	cyclictest	2593385	-21	latency_hist	09:42:06	7
2273493	2	40	3,31	sleep7	0	-21	swapper/7	07:02:38	7
2274366	2	39	29,7	sleep5	0	-21	swapper/5	07:06:45	5
2274690	99	38	36,2	cyclictest	2773691	-21	kworker/u16:4+flush-8:0	10:57:41	6
2274690	99	37	35,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:23:41	6
2274690	99	34	32,2	cyclictest	2773691	-21	kworker/u16:4+events_unbound	11:50:34	6
2274690	99	34	32,2	cyclictest	2773691	-21	kworker/u16:4+events_unbound	11:50:34	6
2274690	99	34	32,2	cyclictest	2651382	-21	kworker/u16:3+events_unbound	10:45:53	6
2274139	2	34	24,7	sleep6	0	-21	swapper/6	07:03:33	6
2274690	99	33	31,2	cyclictest	2786476	-21	kworker/u16:0+events_unbound	11:08:41	6
2274690	99	33	31,2	cyclictest	2460863	-21	kworker/u16:2+flush-8:0	09:36:37	6
2274690	99	32	30,2	cyclictest	2786476	-21	kworker/u16:0+events_unbound	11:24:17	6
2274690	99	32	30,2	cyclictest	2630059	-21	kworker/u16:0+events_unbound	10:30:41	6
2274690	99	32	30,2	cyclictest	2630059	-21	kworker/u16:0+events_unbound	10:30:41	6
2274685	99	32	29,3	cyclictest	2773691	-21	kworker/u16:4+flush-8:0	12:07:21	4
2274690	99	31	29,2	cyclictest	2952865	-21	kworker/u16:1+events_unbound	12:31:41	6
2274690	99	31	29,2	cyclictest	2895359	-21	kworker/u16:3+flush-8:0	11:58:16	6
2274690	99	31	29,2	cyclictest	2773691	-21	kworker/u16:4+events_unbound	12:12:12	6
2274690	99	31	29,2	cyclictest	2773691	-21	kworker/u16:4+events_unbound	11:14:17	6
2274690	99	30	29,1	cyclictest	2630059	-21	kworker/u16:0+flush-8:0	10:11:57	6
2274690	99	30	28,2	cyclictest	2786476	-21	kworker/u16:0+flush-8:0	11:56:44	6
2274690	99	30	28,2	cyclictest	2786476	-21	kworker/u16:0+flush-8:0	11:41:33	6
2274690	99	30	28,2	cyclictest	2508969	-21	kworker/u16:1+flush-8:0	09:07:57	6
2274690	99	30	27,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:27:08	6
3001338	2	29	0,0	sleep7	3001337	-21	rm	12:28:13	7
2274690	99	29	27,2	cyclictest	2773691	-21	kworker/u16:4+events_unbound	11:19:05	6
2274690	99	29	27,2	cyclictest	2508969	-21	kworker/u16:1+events_unbound	09:57:41	6
2274690	99	29	27,2	cyclictest	2508969	-21	kworker/u16:1+events_unbound	09:37:57	6
2274685	99	29	26,2	cyclictest	2630059	-21	kworker/u16:0+events_unbound	09:57:21	4
2274695	99	28	23,4	cyclictest	2441673	-21	latency_hist	08:32:06	7
2274695	99	28	23,4	cyclictest	2441673	-21	latency_hist	08:32:06	7
2274690	99	28	26,2	cyclictest	2870875	-21	kworker/u16:2+events_unbound	11:45:41	6
2274690	99	28	26,2	cyclictest	2786476	-21	kworker/u16:0+flush-8:0	12:19:36	6
2274690	99	28	25,2	cyclictest	2630059	-21	kworker/u16:0+events_unbound	10:22:24	6
2274685	99	28	26,2	cyclictest	2201862	-21	kworker/u16:0+flush-8:0	07:22:20	4
2274695	99	27	22,4	cyclictest	2605482	-21	latency_hist	09:47:06	7
2274690	99	27	25,2	cyclictest	2952865	-21	kworker/u16:1+flush-8:0	12:34:48	6
2274690	99	27	25,2	cyclictest	2952865	-21	kworker/u16:1+events_unbound	12:25:16	6
2274690	99	27	25,2	cyclictest	2895359	-21	kworker/u16:3+flush-8:0	12:04:04	6
2274690	99	27	25,2	cyclictest	2630059	-21	kworker/u16:0+flush-8:0	10:18:16	6
2274690	99	27	25,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:48:28	6
2274690	99	27	25,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:48:28	6
2274685	99	27	25,2	cyclictest	2651382	-21	kworker/u16:3+flush-8:0	11:17:29	4
2274685	99	27	25,2	cyclictest	2651382	-21	kworker/u16:3+events_unbound	11:07:29	4
2274690	99	26	24,2	cyclictest	2713577	-21	kworker/u16:2+flush-8:0	10:33:32	6
2274690	99	26	24,2	cyclictest	2651382	-21	kworker/u16:3+events_unbound	10:16:42	6
2274690	99	26	24,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:13:33	6
2274690	99	26	24,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	09:13:33	6
2274690	99	26	23,2	cyclictest	2508969	-21	kworker/u16:1+flush-8:0	09:42:07	6
2274685	99	26	24,2	cyclictest	2773691	-21	kworker/u16:4+flush-8:0	11:57:36	4
2274690	99	25	23,2	cyclictest	2786476	-21	kworker/u16:0+events_unbound	11:33:36	6
2274690	99	25	23,2	cyclictest	2773691	-21	kworker/u16:4+flush-8:0	12:10:44	6
2274690	99	25	23,2	cyclictest	2591081	-21	kworker/u16:3+events_unbound	09:56:29	6
2274685	99	25	23,2	cyclictest	2952865	-21	kworker/u16:1+flush-8:0	12:32:34	4
2274690	99	24	22,2	cyclictest	2786476	-21	kworker/u16:0+events_unbound	11:28:08	6
2274690	99	24	22,2	cyclictest	2651382	-21	kworker/u16:3+events_unbound	10:03:09	6
2274690	99	24	22,2	cyclictest	2508969	-21	kworker/u16:1+flush-8:0	09:21:57	6
2274690	99	24	22,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	08:57:20	6
2274690	99	24	22,2	cyclictest	2383728	-21	kworker/u16:1+flush-8:0	08:32:06	6
2274690	99	24	22,2	cyclictest	2383728	-21	kworker/u16:1+flush-8:0	08:32:06	6
2274685	99	24	20,3	cyclictest	2383728	-21	kworker/u16:1+flush-8:0	08:07:36	4
2274690	99	23	21,2	cyclictest	2630059	-21	kworker/u16:0+flush-8:0	10:50:21	6
2274690	99	22	21,1	cyclictest	2630059	-21	kworker/u16:0+events_unbound	10:54:49	6
2274686	99	22	15,6	cyclictest	2731876	-21	kthreadcore	10:37:24	5
2274686	99	21	19,2	cyclictest	2508969	-21	kworker/u16:1+flush-8:0	09:53:08	5
2274690	99	20	17,2	cyclictest	2460863	-21	kworker/u16:2+flush-8:0	09:02:06	6
2274690	99	19	17,2	cyclictest	2651382	-21	kworker/u16:3+events_unbound	11:04:04	6
2274690	99	19	17,2	cyclictest	2227365	-21	kworker/u16:1+events_unbound	07:31:42	6
2274690	99	19	17,2	cyclictest	2201862	-21	kworker/u16:0+flush-8:0	07:22:32	6
2274685	99	19	17,2	cyclictest	2895359	-21	kworker/u16:3+events_unbound	12:02:20	4
2274695	99	18	14,3	cyclictest	1234	-21	snmpd	10:55:13	7
2274695	99	18	12,5	cyclictest	635	-21	systemd-journal	09:12:06	7
2274695	99	18	12,5	cyclictest	635	-21	systemd-journal	09:12:06	7
2274690	99	18	16,2	cyclictest	2336018	-21	kworker/u16:2+events_unbound	07:58:18	6
2274685	99	18	16,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	08:47:20	4
2274695	99	17	12,4	cyclictest	635	-21	systemd-journal	11:17:00	7
2274695	99	17	0,15	cyclictest	124	-21	kswapd0	11:27:27	7
2274690	99	17	15,2	cyclictest	2713577	-21	kworker/u16:2+flush-8:0	10:38:24	6
2274690	99	17	15,2	cyclictest	2460863	-21	kworker/u16:2+events_unbound	08:42:23	6
2274690	99	17	15,2	cyclictest	2336018	-21	kworker/u16:2+events_unbound	08:03:17	6
2274685	99	17	15,2	cyclictest	2383728	-21	kworker/u16:1+events_unbound	08:37:20	4
2274695	99	16	0,14	cyclictest	0	-21	swapper/7	12:07:30	7
2274695	99	16	0,14	cyclictest	0	-21	swapper/7	11:32:29	7
2274686	99	16	0,15	cyclictest	0	-21	swapper/5	09:12:25	5
2274686	99	16	0,15	cyclictest	0	-21	swapper/5	09:12:25	5
2274686	99	16	0,14	cyclictest	0	-21	swapper/5	09:28:58	5
2274685	99	16	14,2	cyclictest	2460863	-21	kworker/u16:2+flush-8:0	09:32:32	4
2274685	99	16	12,3	cyclictest	2404481	-21	iostat_ios	08:12:21	4
2274685	99	16	0,15	cyclictest	2602669	-21	switchtime	09:42:34	4
2274695	99	15	12,2	cyclictest	0	-21	swapper/7	09:47:06	7
2274695	99	15	12,2	cyclictest	0	-21	swapper/7	09:47:06	7
2274695	99	15	10,4	cyclictest	2297596	-21	latency_hist	07:17:07	7
2274695	99	15	0,14	cyclictest	2689119	-21	ssh	10:20:42	7
2274695	99	15	0,13	cyclictest	2508928	-21	diskmemload	11:02:28	7
2274695	99	15	0,13	cyclictest	0	-21	swapper/7	11:22:29	7
2274690	99	15	13,2	cyclictest	2383728	-21	kworker/u16:1+flush-8:0	08:39:17	6
2274690	99	15	13,2	cyclictest	2383728	-21	kworker/u16:1+flush-8:0	08:12:30	6
2274686	99	15	13,2	cyclictest	0	-21	swapper/5	11:48:30	5
2274686	99	15	13,2	cyclictest	0	-21	swapper/5	11:48:30	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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