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 Feb 15, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
841965	2	59	49,7	sleep4	0	-21	swapper/4	19:03:12	4
841966	2	53	41,8	sleep5	0	-21	swapper/5	19:03:13	5
842437	99	45	43,2	cyclictest	130122	-21	kworker/u16:2+events_unbound	19:06:11	5
842437	99	43	40,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	22:31:05	5
842437	99	40	38,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:36:08	5
841874	2	40	3,31	sleep7	0	-21	swapper/7	19:01:54	7
842437	99	39	37,2	cyclictest	1492864	-21	kworker/u16:5+events_unbound	00:06:43	5
842437	99	39	37,2	cyclictest	130122	-21	kworker/u16:2+flush-8:0	19:21:24	5
842437	99	39	37,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	21:49:51	5
842437	99	39	37,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	21:37:15	5
842437	99	39	37,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	21:22:47	5
842437	99	39	36,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	23:30:42	5
842446	99	38	31,5	cyclictest	1046947	-21	latency_hist	20:50:40	7
842437	99	38	36,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:05:19	5
842437	99	38	36,2	cyclictest	1099525	-21	kworker/u16:3+events_unbound	21:28:27	5
842437	99	37	35,2	cyclictest	1562170	-21	kworker/u16:0+events_unbound	00:28:03	5
842437	99	37	35,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	23:26:43	5
842437	99	37	35,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	00:12:11	5
842437	99	37	35,2	cyclictest	1290271	-21	kworker/u16:2+events_unbound	23:52:49	5
842437	99	37	35,2	cyclictest	1204650	-21	kworker/u16:5+events_unbound	22:36:26	5
842437	99	37	35,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	21:58:19	5
842437	99	37	35,2	cyclictest	1085293	-21	kworker/u16:0+events_unbound	21:09:16	5
842437	99	37	35,2	cyclictest	1027441	-21	kworker/u16:1+events_unbound	21:11:47	5
842437	99	36	34,2	cyclictest	1562170	-21	kworker/u16:0+events_unbound	00:35:03	5
842437	99	36	34,2	cyclictest	1480918	-21	kworker/u16:1+events_unbound	00:16:26	5
842437	99	36	34,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	23:59:43	5
842437	99	36	34,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	22:49:18	5
842437	99	36	34,2	cyclictest	1290271	-21	kworker/u16:2+flush-8:0	22:40:50	5
842437	99	36	34,2	cyclictest	1290271	-21	kworker/u16:2+events_unbound	23:25:27	5
842437	99	36	34,2	cyclictest	1204650	-21	kworker/u16:5+events_unbound	22:14:15	5
842437	99	36	34,2	cyclictest	1204650	-21	kworker/u16:5+events_unbound	22:02:14	5
842437	99	36	34,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	22:22:51	5
842437	99	36	34,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	22:09:55	5
841835	2	36	26,7	sleep6	0	-21	swapper/6	19:01:21	6
842437	99	35	33,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	23:07:42	5
842437	99	35	33,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:45:15	5
842437	99	35	33,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:15:11	5
842437	99	35	33,2	cyclictest	1290271	-21	kworker/u16:2+events_unbound	22:59:59	5
842437	99	35	33,2	cyclictest	1171289	-21	kworker/u16:0+events_unbound	22:28:35	5
842437	99	35	33,2	cyclictest	1099525	-21	kworker/u16:3+events_unbound	21:19:51	5
842437	99	35	33,2	cyclictest	1027441	-21	kworker/u16:1+events_unbound	21:32:22	5
842437	99	35	32,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:15:41	5
842437	99	34	32,2	cyclictest	1290271	-21	kworker/u16:2+events_unbound	22:52:59	5
842437	99	34	32,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	22:16:59	5
842437	99	34	32,2	cyclictest	1027441	-21	kworker/u16:1+events_unbound	21:43:34	5
842437	99	34	31,2	cyclictest	941777	-21	kworker/u16:1+events_unbound	20:05:43	5
842446	99	33	32,0	cyclictest	0	-21	swapper/7	00:06:51	7
842437	99	33	31,2	cyclictest	1480918	-21	kworker/u16:1+events_unbound	00:01:38	5
842437	99	32	30,2	cyclictest	1314045	-21	kworker/u16:0+events_unbound	23:47:54	5
842437	99	32	30,2	cyclictest	1183226	-21	kworker/u16:1+events_unbound	21:52:06	5
842437	99	31	29,2	cyclictest	884318	-21	kworker/u16:1+events_unbound	19:32:50	5
842437	99	31	29,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	00:23:59	5
842446	99	30	28,1	cyclictest	0	-21	swapper/7	23:41:10	7
842446	99	30	28,1	cyclictest	0	-21	swapper/7	20:55:58	7
842446	99	30	24,5	cyclictest	865231	-21	latency_hist	19:15:41	7
842437	99	30	28,2	cyclictest	894265	-21	kworker/u16:3+events_unbound	19:41:10	5
842437	99	30	28,2	cyclictest	894265	-21	kworker/u16:3+events_unbound	19:41:10	5
842437	99	30	28,2	cyclictest	856761	-21	kworker/u16:0+flush-8:0	19:11:05	5
842437	99	30	28,2	cyclictest	1027441	-21	kworker/u16:1+flush-8:0	20:45:40	5
842442	99	29	26,2	cyclictest	1336558	-21	kworker/u16:3+events_unbound	00:16:06	6
842446	99	27	21,5	cyclictest	1018222	-21	latency_hist	20:35:40	7
842437	99	27	25,2	cyclictest	941777	-21	kworker/u16:1+events_unbound	20:02:51	5
842433	99	27	25,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	21:41:06	4
948156	2	26	0,1	sleep5	0	-21	swapper/5	19:56:00	5
842446	99	26	21,4	cyclictest	960887	-21	latency_hist	20:05:41	7
842437	99	26	24,2	cyclictest	930478	-21	kworker/u16:0+events_unbound	20:25:34	5
842446	99	25	24,0	cyclictest	0	-21	swapper/7	19:41:02	7
842446	99	25	24,0	cyclictest	0	-21	swapper/7	19:41:02	7
842446	99	25	19,5	cyclictest	650	-21	systemd-journal	21:50:40	7
842437	99	25	23,2	cyclictest	130122	-21	kworker/u16:2+events_unbound	19:16:36	5
842433	99	25	23,2	cyclictest	130122	-21	kworker/u16:2+flush-8:0	19:10:56	4
1455396	2	25	0,1	sleep6	0	-21	swapper/6	23:42:24	6
842446	99	24	0,23	cyclictest	1299810	-21	ssh	22:36:16	7
842442	99	24	21,2	cyclictest	1009049	-21	kworker/u16:3+flush-8:0	20:51:06	6
842437	99	24	22,2	cyclictest	914657	-21	kworker/u16:4+events_unbound	19:52:51	5
842433	99	24	21,2	cyclictest	1099525	-21	kworker/u16:3+events_unbound	21:45:55	4
842437	99	23	21,2	cyclictest	894265	-21	kworker/u16:3+events_unbound	19:48:55	5
842446	99	22	17,4	cyclictest	1373601	-21	latency_hist	23:10:39	7
842446	99	22	16,5	cyclictest	932202	-21	latency_hist	19:50:40	7
842442	99	21	19,2	cyclictest	930478	-21	kworker/u16:0+flush-8:0	20:31:05	6
842433	99	21	19,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	21:16:07	4
842446	99	20	19,0	cyclictest	0	-21	swapper/7	19:16:09	7
842442	99	20	16,3	cyclictest	1336558	-21	kworker/u16:3+flush-8:0	00:10:25	6
842437	99	20	17,2	cyclictest	1009049	-21	kworker/u16:3+flush-8:0	20:45:50	5
842446	99	19	17,1	cyclictest	0	-21	swapper/7	21:15:59	7
842442	99	19	17,2	cyclictest	1254368	-21	kworker/u16:1+flush-8:0	22:51:08	6
842437	99	19	17,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	21:04:48	5
842446	99	18	7,9	cyclictest	0	-21	swapper/7	21:06:01	7
842446	99	18	15,2	cyclictest	1208671	-21	grep	22:00:58	7
842446	99	18	14,3	cyclictest	1267	-21	snmpd	21:39:36	7
842446	99	18	13,4	cyclictest	1421338	-21	latency_hist	23:30:40	7
842446	99	18	13,4	cyclictest	1206685	-21	latency_hist	22:00:40	7
842446	99	18	11,6	cyclictest	0	-21	swapper/7	22:55:40	7
842446	99	18	0,17	cyclictest	941771	-21	awk	19:55:40	7
842437	99	18	16,2	cyclictest	930478	-21	kworker/u16:0+events_unbound	20:26:50	5
842437	99	18	16,2	cyclictest	1046984	-21	kworker/u16:2+events_unbound	20:57:52	5
842433	99	18	14,3	cyclictest	1171289	-21	kworker/u16:0+events_unbound	22:05:53	4
842446	99	17	8,8	cyclictest	0	-21	swapper/7	23:01:01	7
842446	99	17	13,3	cyclictest	1267	-21	snmpd	23:33:06	7
842446	99	17	12,4	cyclictest	1540599	-21	latency_hist	00:20:40	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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