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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 50 highest latencies:

System rack0slot2.osadl.org (updated Sat Apr 11, 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
4100496	2	98	0,1	sleep7	4100495	-21	ssh	10:22:09	7
3671509	2	58	47,7	sleep5	0	-21	swapper/5	07:01:11	5
3671851	99	56	53,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	10:47:14	5
4119082	2	55	0,0	sleep7	4119083	-21	grep	10:27:22	7
3671856	99	54	52,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:22:29	6
3671851	99	54	52,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	09:27:28	5
3671490	2	54	44,7	sleep4	0	-21	swapper/4	07:00:54	4
3671303	2	53	43,7	sleep6	0	-21	swapper/6	06:58:15	6
3671856	99	51	48,2	cyclictest	4026863	-21	kworker/u16:5+events_unbound	10:07:13	6
3671851	99	51	49,2	cyclictest	52871	-21	kworker/u16:0+events_unbound	11:22:29	5
3671851	99	51	49,2	cyclictest	4112262	-21	kworker/u16:2+flush-8:0	11:27:28	5
3671851	99	51	49,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	12:27:16	5
3671851	99	50	48,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:02:29	5
3671851	99	50	48,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:02:29	5
3671851	99	49	46,2	cyclictest	3990344	-21	kworker/u16:4+events_unbound	09:57:13	5
3671851	99	48	45,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	12:07:13	5
3671861	99	47	39,7	cyclictest	650	-21	systemd-journal	08:36:59	7
3671856	99	47	45,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:02:13	6
3671851	99	47	45,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:22:29	5
3671851	99	47	45,2	cyclictest	3713695	-21	kworker/u16:0+events_unbound	09:22:29	5
3671856	99	46	44,2	cyclictest	4112262	-21	kworker/u16:2+flush-8:0	10:32:33	6
3671856	99	46	44,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:12:29	6
3671856	99	46	43,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	12:17:12	6
3671851	99	46	43,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:12:21	5
3671856	99	45	42,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:52:17	6
3671851	99	45	42,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:32:00	5
3671856	99	44	42,2	cyclictest	1273	-21	kworker/u16:5+flush-8:0	11:17:32	6
3671856	99	44	41,2	cyclictest	3941404	-21	kworker/u16:1+events_unbound	09:27:13	6
3671856	99	44	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:47:32	6
3671851	99	44	42,2	cyclictest	4134073	-21	kworker/u16:1+events_unbound	10:37:01	5
3671851	99	44	42,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	12:16:41	5
3671851	99	44	42,2	cyclictest	3990344	-21	kworker/u16:4+events_unbound	09:52:25	5
3671851	99	44	42,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:08:09	5
3671851	99	44	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:37:14	5
3671851	99	43	41,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	11:51:01	5
3671851	99	43	41,2	cyclictest	4062801	-21	kworker/u16:0+events_unbound	10:31:01	5
3671851	99	43	41,2	cyclictest	3964673	-21	kworker/u16:3+events_unbound	10:22:12	5
3671851	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:42:28	5
3671851	99	43	41,2	cyclictest	1273	-21	kworker/u16:5+events_unbound	11:17:28	5
3671847	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:22:24	4
3671847	99	43	41,2	cyclictest	3926600	-21	kworker/u16:2+flush-8:0	09:22:24	4
3671856	99	42	40,2	cyclictest	4174749	-21	kworker/u16:4+events_unbound	11:07:32	6
3671856	99	42	39,2	cyclictest	3913849	-21	kworker/u16:1+events_unbound	09:07:01	6
3671851	99	42	40,2	cyclictest	3926600	-21	kworker/u16:2+events_unbound	09:17:15	5
3671861	99	41	34,6	cyclictest	174456	-21	latency_hist	12:11:59	7
3671856	99	41	39,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	10:42:28	6
3671856	99	41	39,2	cyclictest	3964673	-21	kworker/u16:3+flush-8:0	10:42:28	6
3671856	99	41	39,2	cyclictest	3941404	-21	kworker/u16:1+events_unbound	09:19:08	6
3671856	99	41	39,2	cyclictest	101251	-21	kworker/u16:1+events_unbound	11:59:41	6
3671856	99	41	38,2	cyclictest	4112262	-21	kworker/u16:2+events_unbound	10:57:16	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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