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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 Jan 05, 2026 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1097057	2	58	47,8	sleep5	0	-21	swapper/5	19:05:54	5
1097057	2	58	47,8	sleep5	0	-21	swapper/5	19:05:54	5
1097145	2	54	20,30	sleep7	0	-21	swapper/7	19:07:09	7
1097145	2	54	20,30	sleep7	0	-21	swapper/7	19:07:09	7
1097540	99	49	0,47	cyclictest	1507508	-21	latency_hist	22:38:26	7
1097540	99	49	0,47	cyclictest	1507508	-21	latency_hist	22:38:26	7
1088028	2	47	37,7	sleep4	0	-21	swapper/4	19:03:29	4
1088028	2	47	37,7	sleep4	0	-21	swapper/4	19:03:29	4
1097538	99	41	39,2	cyclictest	1304008	-21	kworker/u16:0+flush-8:0	21:03:26	6
1097538	99	37	35,2	cyclictest	1265767	-21	kworker/u16:3+flush-8:0	20:43:26	6
1097133	2	35	25,7	sleep6	0	-21	swapper/6	19:07:00	6
1097133	2	35	25,7	sleep6	0	-21	swapper/6	19:07:00	6
1097538	99	34	31,2	cyclictest	1323848	-21	kworker/u16:1+events_unbound	21:28:29	6
1097534	99	33	31,2	cyclictest	1169341	-21	kworker/u16:2+flush-8:0	20:08:26	5
1097534	99	32	30,2	cyclictest	1458226	-21	kworker/u16:3+flush-8:0	22:13:26	5
1097540	99	31	29,1	cyclictest	1160594	-21	sed	19:38:45	7
1097538	99	31	29,2	cyclictest	1498112	-21	kworker/u16:0+flush-8:0	23:13:36	6
1097538	99	30	28,2	cyclictest	1622498	-21	kworker/u16:0+events_unbound	00:19:08	6
1097538	99	30	28,2	cyclictest	1458226	-21	kworker/u16:3+flush-8:0	22:13:52	6
1097538	99	30	28,2	cyclictest	1400807	-21	kworker/u16:0+flush-8:0	21:43:26	6
1097534	99	30	28,2	cyclictest	382376	-21	kworker/u16:1+flush-8:0	19:38:26	5
1097540	99	29	28,0	cyclictest	0	-21	swapper/7	19:18:49	7
1097538	99	28	26,2	cyclictest	1088032	-21	kworker/u16:3+flush-8:0	19:13:55	6
1097538	99	27	24,2	cyclictest	382376	-21	kworker/u16:1+flush-8:0	19:38:36	6
1097540	99	26	0,24	cyclictest	1352841	-21	awk	21:18:26	7
1097538	99	26	23,2	cyclictest	1169341	-21	kworker/u16:2+events_unbound	19:48:28	6
1097534	99	26	24,2	cyclictest	1691217	-21	kworker/u16:3+flush-8:0	00:28:21	5
1097540	99	25	18,6	cyclictest	1159338	-21	latency_hist	19:38:26	7
1097538	99	25	23,2	cyclictest	382376	-21	kworker/u16:1+events_unbound	19:35:36	6
1097538	99	25	23,2	cyclictest	1623791	-21	kworker/u16:1+events_unbound	23:50:36	6
1097538	99	25	22,2	cyclictest	1265767	-21	kworker/u16:3+events_unbound	21:13:28	6
1097534	99	25	23,2	cyclictest	1382172	-21	kworker/u16:4+flush-8:0	21:48:26	5
1097540	99	24	23,0	cyclictest	0	-21	swapper/7	00:23:43	7
1097540	99	24	18,5	cyclictest	1497844	-21	latency_hist	22:33:26	7
1097538	99	24	22,2	cyclictest	1159377	-21	kworker/u16:0+events_unbound	20:03:48	6
1097538	99	24	21,2	cyclictest	1378677	-21	kworker/u16:3+flush-8:0	21:53:36	6
1097538	99	24	21,2	cyclictest	1120664	-21	kworker/u16:2+flush-8:0	19:28:36	6
1097534	99	24	22,2	cyclictest	1378677	-21	kworker/u16:3+events_unbound	21:38:49	5
1097534	99	24	22,2	cyclictest	1265767	-21	kworker/u16:3+events_unbound	20:48:45	5
1097534	99	24	20,3	cyclictest	1285038	-21	kworker/u16:2+flush-8:0	21:13:47	5
1097534	99	23	21,2	cyclictest	1507715	-21	kworker/u16:2+flush-8:0	22:58:26	5
1097534	99	23	21,2	cyclictest	1378677	-21	kworker/u16:3+flush-8:0	21:53:26	5
1097534	99	23	21,2	cyclictest	1378677	-21	kworker/u16:3+flush-8:0	21:53:26	5
1097534	99	23	21,2	cyclictest	1256140	-21	kworker/u16:1+flush-8:0	20:43:56	5
1097540	99	22	21,0	cyclictest	0	-21	swapper/7	20:13:51	7
1097540	99	22	21,0	cyclictest	0	-21	swapper/7	20:13:51	7
1097538	99	22	20,2	cyclictest	1720207	-21	kworker/u16:2+flush-8:0	00:28:41	6
1097538	99	22	20,2	cyclictest	1575343	-21	kworker/u16:4+events_unbound	23:30:07	6
1097540	99	21	20,0	cyclictest	0	-21	swapper/7	23:13:46	7
1097540	99	21	20,0	cyclictest	0	-21	swapper/7	19:28:41	7
1097538	99	21	19,2	cyclictest	1622498	-21	kworker/u16:0+flush-8:0	00:00:07	6
1097538	99	21	18,2	cyclictest	1159377	-21	kworker/u16:0+flush-8:0	20:28:37	6
1097534	99	21	19,2	cyclictest	1458226	-21	kworker/u16:3+flush-8:0	22:23:54	5
1097538	99	20	18,2	cyclictest	1458226	-21	kworker/u16:3+events_unbound	22:56:36	6
1097538	99	20	18,2	cyclictest	1285038	-21	kworker/u16:2+events_unbound	21:07:09	6
1097538	99	20	18,2	cyclictest	1159377	-21	kworker/u16:0+events_unbound	20:23:09	6
1097534	99	20	18,2	cyclictest	1622498	-21	kworker/u16:0+events_unbound	00:03:43	5
1097534	99	20	17,2	cyclictest	1120664	-21	kworker/u16:2+flush-8:0	19:33:21	5
1097540	99	19	18,0	cyclictest	0	-21	swapper/7	22:53:36	7
1097540	99	19	18,0	cyclictest	0	-21	swapper/7	22:38:44	7
1097540	99	19	18,0	cyclictest	0	-21	swapper/7	00:03:47	7
1097538	99	19	17,2	cyclictest	1575343	-21	kworker/u16:4+events_unbound	23:26:16	6
1097538	99	19	17,2	cyclictest	1507715	-21	kworker/u16:2+events_unbound	23:33:28	6
1097534	99	19	17,2	cyclictest	1507715	-21	kworker/u16:2+flush-8:0	22:39:00	5
1097534	99	19	17,2	cyclictest	1256140	-21	kworker/u16:1+flush-8:0	20:28:50	5
1097534	99	19	17,2	cyclictest	1120664	-21	kworker/u16:2+flush-8:0	19:23:59	5
1097540	99	18	16,1	cyclictest	0	-21	swapper/7	23:03:47	7
1097540	99	18	13,4	cyclictest	650	-21	systemd-journal	23:48:26	7
1097540	99	18	11,6	cyclictest	1362455	-21	latency_hist	21:23:26	7
1097538	99	18	16,2	cyclictest	828794	-21	kworker/u16:0+events_unbound	19:23:09	6
1097538	99	18	16,2	cyclictest	1458226	-21	kworker/u16:3+flush-8:0	23:09:07	6
1097538	99	18	16,2	cyclictest	1378677	-21	kworker/u16:3+flush-8:0	21:48:57	6
1097538	99	18	16,2	cyclictest	1378677	-21	kworker/u16:3+flush-8:0	21:48:57	6
1097538	99	18	16,2	cyclictest	1169341	-21	kworker/u16:2+events_unbound	19:43:46	6
1097534	99	18	16,2	cyclictest	1400807	-21	kworker/u16:0+flush-8:0	21:58:56	5
1097540	99	17	14,2	cyclictest	1267	-21	snmpd	21:50:50	7
1097540	99	17	14,2	cyclictest	1267	-21	snmpd	21:50:50	7
1097538	99	17	15,2	cyclictest	1216397	-21	kworker/u16:5+events_unbound	20:23:46	6
1097534	99	17	15,2	cyclictest	1304008	-21	kworker/u16:0+events_unbound	21:08:39	5
1097540	99	16	14,1	cyclictest	0	-21	swapper/7	20:53:46	7
1097540	99	16	13,2	cyclictest	1267	-21	snmpd	21:56:11	7
1097540	99	16	11,4	cyclictest	1691178	-21	latency_hist	00:13:25	7
1097540	99	16	11,4	cyclictest	1691178	-21	latency_hist	00:13:25	7
1097540	99	16	0,14	cyclictest	0	-21	swapper/7	19:58:53	7
1097538	99	16	14,2	cyclictest	1458226	-21	kworker/u16:3+events_unbound	22:30:36	6
1097538	99	16	14,2	cyclictest	1382172	-21	kworker/u16:4+flush-8:0	22:39:28	6
1097538	99	16	14,2	cyclictest	1323848	-21	kworker/u16:1+flush-8:0	21:28:16	6
1097538	99	16	14,2	cyclictest	1304008	-21	kworker/u16:0+events_unbound	20:51:37	6
1097538	99	16	14,2	cyclictest	1159377	-21	kworker/u16:0+events_unbound	19:57:37	6
1097534	99	16	14,2	cyclictest	1382172	-21	kworker/u16:4+flush-8:0	22:33:46	5
1097534	99	16	14,2	cyclictest	1382172	-21	kworker/u16:4+flush-8:0	22:33:46	5
1097534	99	16	14,2	cyclictest	1285038	-21	kworker/u16:2+flush-8:0	21:18:52	5
1097534	99	16	0,2	cyclictest	1371271	-21	ps	21:23:53	5
1097532	99	16	13,2	cyclictest	1653666	-21	iostat_ios	23:53:42	4
1097540	99	15	14,0	cyclictest	0	-21	swapper/7	23:23:40	7
1097540	99	15	0,13	cyclictest	0	-21	swapper/7	23:38:52	7
1097538	99	15	13,2	cyclictest	1498112	-21	kworker/u16:0+events_unbound	22:49:37	6
1097538	99	15	13,2	cyclictest	1400807	-21	kworker/u16:0+events_unbound	21:39:36	6
1097538	99	15	13,2	cyclictest	1265767	-21	kworker/u16:3+events_unbound	21:12:36	6
1097538	99	15	13,2	cyclictest	1216397	-21	kworker/u16:5+events_unbound	20:17:09	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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