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 Tue Jun 30, 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
1263157	2	99	0,1	sleep7	1263158	-21	ssh	21:27:56	7
978573	2	59	49,7	sleep4	0	-21	swapper/4	19:07:40	4
978596	2	51	16,30	sleep7	0	-21	swapper/7	19:07:59	7
978520	2	48	38,7	sleep5	0	-21	swapper/5	19:06:53	5
978963	99	39	33,5	cyclictest	1147294	-21	latency_hist	20:34:09	7
978963	99	38	32,5	cyclictest	1568593	-21	latency_hist	23:34:09	7
1433275	2	38	0,0	sleep7	1433273	-21	ssh	22:36:56	7
978956	99	37	35,2	cyclictest	1690519	-21	kworker/u16:4+events_unbound	00:26:36	5
978956	99	37	35,2	cyclictest	1421534	-21	kworker/u16:3+events_unbound	23:26:27	5
978956	99	37	34,2	cyclictest	1203071	-21	kworker/u16:1+events_unbound	21:34:12	5
978948	99	37	35,2	cyclictest	1298380	-21	kworker/u16:1+flush-8:0	22:04:09	4
978948	99	37	33,3	cyclictest	1568634	-21	kworker/u16:4+flush-8:0	23:49:09	4
978963	99	36	0,34	cyclictest	1458948	-21	latency_hist	22:49:09	7
978956	99	36	34,2	cyclictest	1349489	-21	kworker/u16:2+events_unbound	23:17:27	5
978956	99	36	34,2	cyclictest	1349489	-21	kworker/u16:2+events_unbound	23:17:27	5
978956	99	36	34,2	cyclictest	1227305	-21	kworker/u16:5+events_unbound	21:52:28	5
978956	99	35	33,2	cyclictest	1639174	-21	kworker/u16:5+events_unbound	00:12:08	5
978956	99	35	33,2	cyclictest	1334558	-21	kworker/u16:0+events_unbound	22:30:27	5
978956	99	35	33,2	cyclictest	1334558	-21	kworker/u16:0+events_unbound	22:30:27	5
978956	99	35	33,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:36:07	5
978956	99	35	33,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:09:03	5
978956	99	35	33,2	cyclictest	1203071	-21	kworker/u16:1+events_unbound	21:14:04	5
978956	99	34	32,2	cyclictest	1703147	-21	kworker/u16:1+events_unbound	00:36:58	5
978956	99	34	32,2	cyclictest	1666496	-21	kworker/u16:0+events_unbound	00:20:48	5
978956	99	34	32,2	cyclictest	1630027	-21	kworker/u16:3+events_unbound	00:01:22	5
978956	99	33	31,2	cyclictest	1581235	-21	kworker/u16:2+events_unbound	23:55:04	5
978956	99	33	31,2	cyclictest	1581235	-21	kworker/u16:2+events_unbound	23:55:04	5
978956	99	33	31,2	cyclictest	1544726	-21	kworker/u16:0+events_unbound	23:46:32	5
978956	99	33	31,2	cyclictest	1421534	-21	kworker/u16:3+events_unbound	22:56:27	5
978956	99	33	31,2	cyclictest	1373645	-21	kworker/u16:3+events_unbound	22:17:08	5
978956	99	33	31,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:24:02	5
978956	99	33	31,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:24:02	5
978956	99	33	31,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:01:35	5
978956	99	33	31,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:36:31	5
978956	99	33	31,2	cyclictest	1041227	-21	kworker/u16:2+flush-8:0	21:15:03	5
978956	99	33	30,2	cyclictest	1334558	-21	kworker/u16:0+events_unbound	22:19:11	5
978948	99	33	31,2	cyclictest	969150	-21	kworker/u16:1+flush-8:0	19:14:39	4
978956	99	32	30,2	cyclictest	1581235	-21	kworker/u16:2+events_unbound	23:43:03	5
978956	99	32	30,2	cyclictest	1421534	-21	kworker/u16:3+events_unbound	22:46:03	5
978956	99	32	30,2	cyclictest	1334558	-21	kworker/u16:0+events_unbound	22:28:47	5
978956	99	32	30,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	23:12:42	5
978956	99	32	30,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:52:40	5
978956	99	32	30,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:11:00	5
978956	99	32	30,2	cyclictest	1276452	-21	kworker/u16:3+events_unbound	21:45:32	5
978956	99	32	30,2	cyclictest	1227305	-21	kworker/u16:5+events_unbound	21:44:08	5
978956	99	32	30,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	21:20:31	5
978956	99	31	29,2	cyclictest	1666496	-21	kworker/u16:0+events_unbound	00:18:43	5
978956	99	31	29,2	cyclictest	1630027	-21	kworker/u16:3+events_unbound	00:30:31	5
978956	99	31	29,2	cyclictest	1349489	-21	kworker/u16:2+events_unbound	22:07:47	5
978956	99	31	29,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	21:26:56	5
978956	99	31	29,2	cyclictest	1031560	-21	kworker/u16:1+events_unbound	19:43:24	5
978948	99	31	28,2	cyclictest	1227305	-21	kworker/u16:5+events_unbound	21:54:24	4
978415	2	31	21,7	sleep6	0	-21	swapper/6	19:05:26	6
978963	99	30	23,6	cyclictest	1361451	-21	latency_hist	22:09:09	7
978956	99	30	28,2	cyclictest	1629862	-21	kworker/u16:1+events_unbound	00:07:02	5
978956	99	30	28,2	cyclictest	1544726	-21	kworker/u16:0+events_unbound	23:33:40	5
978956	99	30	28,2	cyclictest	1421534	-21	kworker/u16:3+flush-8:0	22:39:47	5
978956	99	30	28,2	cyclictest	1334558	-21	kworker/u16:0+events_unbound	21:58:36	5
978956	99	30	28,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:00:47	5
978956	99	30	28,2	cyclictest	1203071	-21	kworker/u16:1+events_unbound	21:30:47	5
978956	99	29	27,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:44:32	5
978956	99	28	26,2	cyclictest	1544726	-21	kworker/u16:0+events_unbound	23:52:24	5
978956	99	28	26,2	cyclictest	1021689	-21	kworker/u16:0+events_unbound	19:36:21	5
978948	99	28	26,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:49:39	4
978956	99	27	25,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	19:56:21	5
978956	99	27	25,2	cyclictest	1021689	-21	kworker/u16:0+events_unbound	21:05:19	5
978956	99	27	25,2	cyclictest	1021689	-21	kworker/u16:0+events_unbound	21:05:19	5
978948	99	27	25,2	cyclictest	925029	-21	kworker/u16:2+flush-8:0	19:09:25	4
978948	99	27	25,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:59:32	4
978963	99	26	21,4	cyclictest	1690486	-21	latency_hist	00:24:09	7
978963	99	26	0,25	cyclictest	1011803	-21	latency_hist	19:24:09	7
978956	99	26	23,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:39:19	5
978948	99	26	23,2	cyclictest	1274092	-21	kworker/u16:0+events_unbound	21:34:37	4
978956	99	25	23,2	cyclictest	1079173	-21	kworker/u16:3+flush-8:0	20:54:39	5
978956	99	25	23,2	cyclictest	1031560	-21	kworker/u16:1+events_unbound	20:00:10	5
978956	99	24	22,2	cyclictest	1079173	-21	kworker/u16:3+events_unbound	20:24:38	5
978956	99	24	21,2	cyclictest	1118271	-21	kworker/u16:1+events_unbound	20:29:19	5
978948	99	24	22,2	cyclictest	1334558	-21	kworker/u16:0+flush-8:0	22:19:09	4
978948	99	24	22,2	cyclictest	1298380	-21	kworker/u16:1+events_unbound	22:54:22	4
978948	99	24	21,2	cyclictest	1630027	-21	kworker/u16:3+events_unbound	00:19:34	4
978956	99	23	21,2	cyclictest	925029	-21	kworker/u16:2+events_unbound	19:11:19	5
978956	99	23	21,2	cyclictest	1079173	-21	kworker/u16:3+events_unbound	20:53:19	5
978956	99	22	20,2	cyclictest	1079173	-21	kworker/u16:3+events_unbound	20:08:19	5
978956	99	21	19,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:09:39	5
978948	99	21	19,2	cyclictest	1041227	-21	kworker/u16:2+flush-8:0	20:39:25	4
978963	99	20	7,11	cyclictest	1278	-21	snmpd	22:03:37	7
978961	99	20	0,1	cyclictest	0	-21	swapper/6	22:49:29	6
978956	99	20	18,2	cyclictest	1021689	-21	kworker/u16:0+events_unbound	21:01:20	5
978948	99	20	18,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:44:24	4
978963	99	19	15,3	cyclictest	1278	-21	snmpd	21:30:18	7
978963	99	18	10,7	cyclictest	650	-21	systemd-journal	21:44:09	7
978956	99	18	16,2	cyclictest	969150	-21	kworker/u16:1+flush-8:0	19:14:48	5
978956	99	18	16,2	cyclictest	1021689	-21	kworker/u16:0+events_unbound	20:16:19	5
978948	99	18	15,2	cyclictest	1021689	-21	kworker/u16:0+flush-8:0	19:44:28	4
978963	99	17	0,1	cyclictest	0	-21	swapper/7	21:34:33	7
978963	99	17	0,15	cyclictest	124	-21	kswapd0	22:13:13	7
978956	99	17	15,2	cyclictest	1041227	-21	kworker/u16:2+events_unbound	20:22:19	5
978956	99	17	15,2	cyclictest	1031560	-21	kworker/u16:1+events_unbound	19:52:05	5
978948	99	17	14,3	cyclictest	1298380	-21	kworker/u16:1+flush-8:0	22:44:09	4
978963	99	16	7,3	cyclictest	6634	-21	gmain	23:37:26	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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