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 Mon Aug 24, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2685609	99	51	45,5	cyclictest	125	-21	kswapd0	10:27:19	7
2685609	99	48	40,7	cyclictest	2796376	-21	latency_hist	08:02:19	7
2685125	2	46	11,30	sleep7	0	-21	swapper/7	07:04:42	7
2685046	2	45	36,6	sleep4	0	-21	swapper/4	07:03:35	4
2685302	2	44	34,7	sleep5	0	-21	swapper/5	07:07:13	5
2685600	99	43	41,2	cyclictest	2737708	-21	kworker/u16:2+flush-8:0	07:32:44	5
2685609	99	41	35,5	cyclictest	3313668	-21	latency_hist	11:47:19	7
2685609	99	41	35,5	cyclictest	2913294	-21	latency_hist	09:02:19	7
2685609	99	40	35,4	cyclictest	3252596	-21	latency_hist	11:22:18	7
2685605	99	39	36,3	cyclictest	2981707	-21	kworker/u16:1+flush-8:0	09:37:19	6
2685600	99	38	36,2	cyclictest	2854721	-21	kworker/u16:1+flush-8:0	08:37:43	5
2685600	99	37	35,2	cyclictest	2825484	-21	kworker/u16:3+events_unbound	08:47:48	5
2685600	99	36	34,2	cyclictest	3069587	-21	kworker/u16:4+events_unbound	11:22:51	5
2685600	99	36	34,2	cyclictest	3069587	-21	kworker/u16:4+events_unbound	11:22:51	5
2685600	99	36	34,2	cyclictest	3050227	-21	kworker/u16:1+events_unbound	10:19:41	5
2685600	99	35	33,2	cyclictest	3189590	-21	kworker/u16:0+events_unbound	11:08:09	5
2685220	2	35	25,7	sleep6	0	-21	swapper/6	07:06:02	6
2685600	99	34	32,2	cyclictest	3375124	-21	kworker/u16:2+events_unbound	12:14:17	5
2685600	99	33	31,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:59:20	5
2685600	99	33	31,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:16:37	5
2685600	99	33	31,2	cyclictest	3142823	-21	kworker/u16:1+events_unbound	10:55:37	5
2685600	99	32	30,2	cyclictest	3189590	-21	kworker/u16:0+events_unbound	11:04:42	5
2685600	99	31	29,2	cyclictest	3410376	-21	kworker/u16:2+events_unbound	12:28:17	5
2685600	99	31	29,2	cyclictest	2665589	-21	kworker/u16:0+flush-8:0	07:27:43	5
2685605	99	30	28,2	cyclictest	3239212	-21	kworker/u16:1+flush-8:0	11:52:49	6
2685600	99	30	28,2	cyclictest	3142823	-21	kworker/u16:1+flush-8:0	10:48:00	5
2685600	99	30	28,2	cyclictest	3116281	-21	kworker/u16:2+events_unbound	10:29:45	5
2685600	99	30	28,2	cyclictest	2981707	-21	kworker/u16:1+flush-8:0	09:34:51	5
2685600	99	30	28,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:21:04	5
2685605	99	29	27,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:12:34	6
2685605	99	29	27,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:12:34	6
2685600	99	29	27,2	cyclictest	3253083	-21	kworker/u16:2+events_unbound	11:46:59	5
2685600	99	29	27,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:38:39	5
2685600	99	29	27,2	cyclictest	3189590	-21	kworker/u16:0+events_unbound	10:58:31	5
2685600	99	29	27,2	cyclictest	3116281	-21	kworker/u16:2+events_unbound	10:36:45	5
2685600	99	29	27,2	cyclictest	3050227	-21	kworker/u16:1+events_unbound	10:26:47	5
2685600	99	29	27,2	cyclictest	3007592	-21	kworker/u16:3+events_unbound	09:41:17	5
2685600	99	29	27,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:28:27	5
2685600	99	29	27,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:09:51	5
2685600	99	28	26,2	cyclictest	3007592	-21	kworker/u16:3+events_unbound	09:50:15	5
2685600	99	28	26,2	cyclictest	2922671	-21	kworker/u16:0+events_unbound	09:15:10	5
2685600	99	28	26,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:57:21	5
2685605	99	27	24,2	cyclictest	3335635	-21	kworker/u16:0+flush-8:0	12:32:34	6
2685600	99	27	25,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	12:05:52	5
2685600	99	27	25,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:36:47	5
2685600	99	27	25,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:20:03	5
2685600	99	27	25,2	cyclictest	3069587	-21	kworker/u16:4+flush-8:0	10:39:22	5
2685600	99	27	25,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:54:31	5
2685605	99	26	24,2	cyclictest	3050227	-21	kworker/u16:1+flush-8:0	09:57:51	6
2685600	99	26	24,2	cyclictest	3397003	-21	kworker/u16:1+events_unbound	12:27:12	5
2685600	99	26	24,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:53:59	5
2685600	99	26	24,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	11:48:15	5
2685600	99	26	24,2	cyclictest	3155444	-21	kworker/u16:2+events_unbound	10:43:51	5
2685600	99	26	24,2	cyclictest	3155444	-21	kworker/u16:2+events_unbound	10:43:51	5
2685600	99	26	24,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:59:22	5
2685600	99	26	24,2	cyclictest	2854721	-21	kworker/u16:1+events_unbound	08:57:17	5
2685600	99	26	24,2	cyclictest	2795887	-21	kworker/u16:4+events_unbound	08:10:05	5
2685600	99	26	24,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:09:26	5
2685600	99	26	23,2	cyclictest	3239212	-21	kworker/u16:1+events_unbound	12:07:30	5
2685609	99	25	22,1	cyclictest	2923002	-21	diskmemload	09:32:34	7
2685605	99	25	23,2	cyclictest	3314078	-21	kworker/u16:3+flush-8:0	11:57:44	6
2685600	99	25	23,2	cyclictest	3397003	-21	kworker/u16:1+events_unbound	12:18:50	5
2685600	99	25	23,2	cyclictest	3253083	-21	kworker/u16:2+events_unbound	11:30:16	5
2685600	99	25	23,2	cyclictest	3050227	-21	kworker/u16:1+events_unbound	10:04:11	5
2685600	99	25	23,2	cyclictest	3007592	-21	kworker/u16:3+events_unbound	10:09:59	5
2685600	99	25	23,2	cyclictest	2922671	-21	kworker/u16:0+flush-8:0	09:25:08	5
2685600	99	25	23,2	cyclictest	2903522	-21	kworker/u16:2+events_unbound	09:05:02	5
2685600	99	25	23,2	cyclictest	2825484	-21	kworker/u16:3+events_unbound	08:22:18	5
2685600	99	25	23,2	cyclictest	2766842	-21	kworker/u16:0+flush-8:0	07:51:06	5
2685600	99	25	23,2	cyclictest	2631381	-21	kworker/u16:4+flush-8:0	07:15:05	5
2685600	99	25	23,2	cyclictest	2631381	-21	kworker/u16:4+flush-8:0	07:15:05	5
2685600	99	25	22,2	cyclictest	3397003	-21	kworker/u16:1+events_unbound	12:32:23	5
2685600	99	25	22,2	cyclictest	3050227	-21	kworker/u16:1+events_unbound	10:12:26	5
2685605	99	24	21,2	cyclictest	3069587	-21	kworker/u16:4+flush-8:0	11:12:38	6
2685600	99	24	22,2	cyclictest	2795887	-21	kworker/u16:4+events_unbound	08:06:01	5
2685600	99	24	22,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:56:46	5
2685609	99	23	17,5	cyclictest	2884091	-21	latency_hist	08:47:19	7
2685609	99	23	0,21	cyclictest	2854953	-21	latency_hist	08:32:19	7
2685605	99	23	22,1	cyclictest	0	-21	swapper/6	09:09:04	6
2685605	99	23	19,3	cyclictest	3069587	-21	kworker/u16:4+flush-8:0	10:32:19	6
2685600	99	23	21,2	cyclictest	2993971	-21	kworker/u16:0+events_unbound	09:46:34	5
2685605	99	22	20,2	cyclictest	2854721	-21	kworker/u16:1+events_unbound	09:12:47	6
2685600	99	22	20,2	cyclictest	2825484	-21	kworker/u16:3+events_unbound	08:45:26	5
2685600	99	22	20,2	cyclictest	2766842	-21	kworker/u16:0+events_unbound	08:28:33	5
2685605	99	21	19,2	cyclictest	2737708	-21	kworker/u16:2+flush-8:0	07:32:52	6
2685605	99	21	19,2	cyclictest	2480715	-21	kworker/u16:3+flush-8:0	07:32:19	6
2685600	99	21	19,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:39:34	5
2934447	2	20	0,1	chrt	2934448	-21	ssh	09:11:01	7
2685605	99	20	18,2	cyclictest	2738142	-21	kworker/u16:4+flush-8:0	07:37:32	6
2685600	99	20	18,2	cyclictest	2854721	-21	kworker/u16:1+flush-8:0	08:59:52	5
2685600	99	20	18,2	cyclictest	2766842	-21	kworker/u16:0+events_unbound	08:16:58	5
2685600	99	20	18,2	cyclictest	2480715	-21	kworker/u16:3+events_unbound	07:44:41	5
2685600	99	20	16,3	cyclictest	2719457	-21	diskstats	07:22:33	5
2685596	99	20	17,2	cyclictest	3375124	-21	kworker/u16:2+flush-8:0	12:17:29	4
2872930	2	19	0,1	sleep4	0	-21	swapper/4	08:37:41	4
2685609	99	19	0,17	cyclictest	1302	-21	snmpd	11:49:48	7
2685605	99	19	17,2	cyclictest	3347929	-21	kworker/u16:2+events_unbound	12:02:33	6
2685605	99	19	17,2	cyclictest	2767535	-21	kworker/u16:1+flush-8:0	07:57:53	6
2685600	99	19	17,2	cyclictest	2854721	-21	kworker/u16:1+flush-8:0	08:33:56	5
2685600	99	19	17,2	cyclictest	2665589	-21	kworker/u16:0+flush-8:0	07:20:33	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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