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 May 17, 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
934127	2	101	0,1	sleep7	0	-21	swapper/7	11:03:09	7
934127	2	101	0,1	sleep7	0	-21	swapper/7	11:03:09	7
1073819	2	101	0,1	sleep7	1073818	-21	ssh	11:58:47	7
416330	99	54	52,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	11:48:15	4
416330	99	48	46,2	cyclictest	583748	-21	kworker/u16:2+events_unbound	08:33:15	4
416330	99	47	45,2	cyclictest	563272	-21	kworker/u16:4+events_unbound	09:13:16	4
415831	2	47	36,7	sleep5	0	-21	swapper/5	07:05:00	5
416342	99	46	41,4	cyclictest	918072	-21	latency_hist	10:57:49	7
416342	99	46	41,3	cyclictest	1051853	-21	latency_hist	11:52:50	7
6280	89	45	0,38	rtkit-daemon	0	-21	swapper/4	07:05:20	4
416342	99	45	39,5	cyclictest	583507	-21	latency_hist	08:32:50	7
416330	99	43	41,2	cyclictest	1004958	-21	kworker/u16:3+events_unbound	11:44:15	4
416330	99	43	41,2	cyclictest	1004958	-21	kworker/u16:3+events_unbound	11:44:15	4
406819	2	40	3,31	sleep7	0	-21	swapper/7	07:02:53	7
416330	99	39	37,2	cyclictest	902998	-21	kworker/u16:2+events_unbound	10:57:40	4
416330	99	39	37,2	cyclictest	784580	-21	kworker/u16:4+flush-8:0	10:33:05	4
416330	99	39	36,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	11:36:43	4
416330	99	38	36,2	cyclictest	747975	-21	kworker/u16:3+events_unbound	10:00:36	4
416330	99	38	36,2	cyclictest	667068	-21	kworker/u16:0+flush-8:0	09:44:23	4
416330	99	38	36,2	cyclictest	667068	-21	kworker/u16:0+flush-8:0	09:44:23	4
416330	99	37	35,2	cyclictest	967092	-21	kworker/u16:4+flush-8:0	11:26:47	4
416330	99	37	35,2	cyclictest	699342	-21	kworker/u16:1+events_unbound	09:40:40	4
416330	99	37	31,6	cyclictest	954990	-21	kworker/u16:0+events_unbound	11:22:35	4
416342	99	36	30,5	cyclictest	564285	-21	latency_hist	08:22:50	7
416330	99	36	34,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	12:02:52	4
416330	99	36	34,2	cyclictest	929569	-21	kworker/u16:1+events_unbound	11:32:35	4
416330	99	36	34,2	cyclictest	915654	-21	kworker/u16:0+events_unbound	11:01:44	4
416330	99	36	34,2	cyclictest	882091	-21	kworker/u16:0+events_unbound	10:46:59	4
416330	99	36	34,2	cyclictest	782039	-21	kworker/u16:1+events_unbound	10:24:40	4
416330	99	36	34,2	cyclictest	782039	-21	kworker/u16:1+events_unbound	10:24:40	4
416330	99	36	34,2	cyclictest	747975	-21	kworker/u16:3+events_unbound	10:28:56	4
416330	99	36	34,2	cyclictest	722782	-21	kworker/u16:2+events_unbound	10:39:55	4
416330	99	36	34,2	cyclictest	722782	-21	kworker/u16:2+events_unbound	09:52:43	4
416330	99	36	34,2	cyclictest	583748	-21	kworker/u16:2+events_unbound	09:24:56	4
416330	99	36	34,2	cyclictest	1124631	-21	kworker/u16:1+flush-8:0	12:32:49	4
416330	99	36	34,2	cyclictest	1004957	-21	kworker/u16:2+flush-8:0	12:25:40	4
416330	99	36	33,2	cyclictest	784580	-21	kworker/u16:4+events_unbound	10:12:12	4
416330	99	35	33,2	cyclictest	942415	-21	kworker/u16:3+events_unbound	11:09:00	4
416330	99	34	32,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	11:53:55	4
416330	99	34	32,2	cyclictest	1076083	-21	kworker/u16:3+events_unbound	12:14:03	4
416330	99	34	32,2	cyclictest	1004957	-21	kworker/u16:2+events_unbound	12:10:12	4
415974	2	34	11,7	sleep6	0	-21	swapper/6	07:07:01	6
416330	99	33	31,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	11:41:36	4
416330	99	33	31,2	cyclictest	782039	-21	kworker/u16:1+events_unbound	10:06:45	4
416330	99	33	31,2	cyclictest	747975	-21	kworker/u16:3+events_unbound	10:49:59	4
416330	99	33	31,2	cyclictest	699342	-21	kworker/u16:1+events_unbound	09:29:55	4
416330	99	33	31,2	cyclictest	672451	-21	kworker/u16:3+events_unbound	09:20:07	4
416330	99	33	31,2	cyclictest	1051854	-21	kworker/u16:1+events_unbound	12:02:15	4
416330	99	33	31,2	cyclictest	1004957	-21	kworker/u16:2+events_unbound	12:37:30	4
416330	99	33	31,2	cyclictest	1004957	-21	kworker/u16:2+events_unbound	12:19:51	4
416330	99	33	30,3	cyclictest	722782	-21	kworker/u16:2+events_unbound	09:54:19	4
416335	99	32	29,2	cyclictest	1110155	-21	kworker/u16:0+events_unbound	12:18:05	5
416330	99	32	30,2	cyclictest	699342	-21	kworker/u16:1+events_unbound	09:35:51	4
416330	99	32	30,2	cyclictest	3898558	-21	kworker/u16:5+events_unbound	07:33:19	4
416330	99	32	29,2	cyclictest	784580	-21	kworker/u16:4+events_unbound	10:12:59	4
416330	99	31	29,2	cyclictest	902998	-21	kworker/u16:2+events_unbound	11:05:35	4
416330	99	31	29,2	cyclictest	902998	-21	kworker/u16:2+events_unbound	11:05:35	4
416330	99	30	28,2	cyclictest	954990	-21	kworker/u16:0+events_unbound	11:16:04	4
416330	99	30	28,2	cyclictest	747975	-21	kworker/u16:3+events_unbound	10:21:19	4
416340	99	29	26,3	cyclictest	525484	-21	kworker/u16:0+flush-8:0	08:28:15	6
416335	99	29	27,2	cyclictest	782039	-21	kworker/u16:1+events_unbound	10:48:15	5
416330	99	29	27,2	cyclictest	650556	-21	kworker/u16:1+flush-8:0	09:07:55	4
416330	99	28	26,2	cyclictest	3898558	-21	kworker/u16:5+events_unbound	07:19:01	4
416340	99	27	25,2	cyclictest	967092	-21	kworker/u16:4+flush-8:0	11:18:15	6
685235	2	26	0,1	chrt	685233	-21	ssh	09:19:14	7
416330	99	26	24,2	cyclictest	507697	-21	kworker/u16:3+events_unbound	08:17:31	4
416330	99	25	23,2	cyclictest	583748	-21	kworker/u16:2+flush-8:0	08:52:00	4
416330	99	25	23,2	cyclictest	507697	-21	kworker/u16:3+events_unbound	08:04:00	4
795791	2	23	0,1	chrt	795792	-21	sh	10:06:18	7
416342	99	23	20,2	cyclictest	124	-21	kswapd0	10:43:03	7
416342	99	23	19,3	cyclictest	1039791	-21	cat	11:47:49	7
416342	99	23	19,3	cyclictest	1039791	-21	cat	11:47:49	7
416330	99	23	21,2	cyclictest	448031	-21	kworker/u16:2+flush-8:0	07:23:20	4
416330	99	23	20,2	cyclictest	448031	-21	kworker/u16:2+events_unbound	07:28:00	4
416342	99	22	17,4	cyclictest	1003204	-21	latency_hist	11:32:50	7
416330	99	22	20,2	cyclictest	563272	-21	kworker/u16:4+events_unbound	08:21:00	4
416330	99	22	19,2	cyclictest	583748	-21	kworker/u16:2+events_unbound	09:02:59	4
416330	99	22	19,2	cyclictest	583748	-21	kworker/u16:2+events_unbound	09:02:59	4
416342	99	21	19,1	cyclictest	1017159	-21	ssh	11:38:07	7
416335	99	21	17,3	cyclictest	563272	-21	kworker/u16:4+flush-8:0	09:08:16	5
416342	99	20	17,2	cyclictest	1121442	-21	ssh	12:18:13	7
416342	99	20	16,3	cyclictest	0	-21	swapper/7	12:22:50	7
416335	99	20	18,2	cyclictest	3898558	-21	kworker/u16:5+flush-8:0	07:12:56	5
416335	99	20	18,2	cyclictest	3898558	-21	kworker/u16:5+events_unbound	07:48:04	5
416335	99	20	18,2	cyclictest	1076083	-21	kworker/u16:3+events_unbound	12:13:04	5
416335	99	20	16,3	cyclictest	782039	-21	kworker/u16:1+flush-8:0	10:43:07	5
416330	99	20	18,2	cyclictest	3898558	-21	kworker/u16:5+events_unbound	07:15:00	4
416342	99	19	9,8	cyclictest	6895	-21	gmain	07:53:03	7
416342	99	19	13,5	cyclictest	525772	-21	latency_hist	08:02:51	7
416340	99	19	17,2	cyclictest	967092	-21	kworker/u16:4+events_unbound	11:23:18	6
416340	99	19	17,2	cyclictest	525979	-21	kworker/u16:1+events_unbound	08:13:15	6
416335	99	19	16,2	cyclictest	915654	-21	kworker/u16:0+flush-8:0	11:03:07	5
416335	99	19	16,2	cyclictest	915654	-21	kworker/u16:0+flush-8:0	11:03:07	5
416330	99	19	17,2	cyclictest	3898558	-21	kworker/u16:5+events_unbound	07:43:44	4
416342	99	18	15,2	cyclictest	1234	-21	snmpd	11:57:19	7
416342	99	18	15,2	cyclictest	1234	-21	snmpd	11:10:09	7
416342	99	18	12,5	cyclictest	612340	-21	latency_hist	08:47:51	7
416340	99	18	15,3	cyclictest	1004958	-21	kworker/u16:3+events_unbound	11:38:05	6
416330	99	18	16,2	cyclictest	583748	-21	kworker/u16:2+events_unbound	09:00:01	4
416330	99	18	16,2	cyclictest	525979	-21	kworker/u16:1+events_unbound	08:38:59	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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