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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 Thu Sep 04, 2025 00:43:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1562831	2	60	49,8	sleep4	0	-21	swapper/4	03:24:45	4
1562850	2	58	48,7	sleep5	0	-21	swapper/5	03:25:02	5
1563453	99	53	47,5	cyclictest	1704225	-21	latency_hist	04:38:50	7
1563453	99	53	0,51	cyclictest	1606345	-21	latency_hist	03:48:50	7
1563453	99	53	0,51	cyclictest	1606345	-21	latency_hist	03:48:50	7
1562947	2	53	20,29	sleep7	0	-21	swapper/7	03:26:24	7
1563441	99	51	49,1	cyclictest	1738737	-21	kworker/u16:3+flush-8:0	06:09:05	4
1563453	99	49	44,4	cyclictest	1841430	-21	latency_hist	05:48:49	7
1563448	99	49	44,2	cyclictest	1508590	-21	kworker/u16:4+flush-8:0	04:04:05	5
1563441	99	49	47,2	cyclictest	2095968	-21	kworker/u16:3+flush-8:0	08:19:24	4
1563441	99	49	47,2	cyclictest	2095968	-21	kworker/u16:3+flush-8:0	08:19:24	4
1563441	99	49	47,2	cyclictest	2095968	-21	kworker/u16:3+events_unbound	08:14:24	4
1563453	99	48	43,4	cyclictest	1939262	-21	latency_hist	06:38:49	7
1563441	99	48	45,2	cyclictest	2007487	-21	kworker/u16:0+events_unbound	07:24:01	4
1563441	99	45	43,2	cyclictest	1738737	-21	kworker/u16:3+events_unbound	05:15:04	4
1563441	99	44	42,2	cyclictest	2007487	-21	kworker/u16:0+events_unbound	07:14:20	4
1563441	99	44	42,2	cyclictest	1841118	-21	kworker/u16:1+events_unbound	05:58:25	4
1563441	99	44	42,2	cyclictest	1684503	-21	kworker/u16:5+events_unbound	04:29:16	4
1563441	99	44	41,2	cyclictest	1585997	-21	kworker/u16:2+events_unbound	05:24:05	4
1563448	99	43	41,2	cyclictest	1585997	-21	kworker/u16:2+events_unbound	04:34:19	5
1563453	99	40	34,5	cyclictest	2115673	-21	latency_hist	08:08:49	7
1563441	99	40	37,2	cyclictest	1585997	-21	kworker/u16:2+flush-8:0	04:14:05	4
1563448	99	39	37,2	cyclictest	2095968	-21	kworker/u16:3+events_unbound	08:14:08	5
1563448	99	39	37,2	cyclictest	1909561	-21	kworker/u16:2+events_unbound	06:49:19	5
1563441	99	39	37,2	cyclictest	1880220	-21	kworker/u16:5+events_unbound	06:38:25	4
1563441	99	39	37,2	cyclictest	1801944	-21	kworker/u16:0+events_unbound	06:05:13	4
1563453	99	38	33,4	cyclictest	1831678	-21	latency_hist	05:43:50	7
1563448	99	38	36,2	cyclictest	1880220	-21	kworker/u16:5+events_unbound	06:29:06	5
1563448	99	38	35,2	cyclictest	1948957	-21	kworker/u16:0+events_unbound	06:44:03	5
1563441	99	38	36,2	cyclictest	2163832	-21	kworker/u16:0+events_unbound	08:48:24	4
1563441	99	38	36,2	cyclictest	2017361	-21	kworker/u16:4+flush-8:0	07:34:19	4
1563441	99	38	36,2	cyclictest	2017361	-21	kworker/u16:4+flush-8:0	07:34:19	4
1563441	99	38	36,2	cyclictest	1801944	-21	kworker/u16:0+flush-8:0	05:29:24	4
1563441	99	38	36,2	cyclictest	1683611	-21	kworker/u16:3+events_unbound	04:35:25	4
1563441	99	38	36,2	cyclictest	1585997	-21	kworker/u16:2+events_unbound	04:05:25	4
1563448	99	37	35,2	cyclictest	2017361	-21	kworker/u16:4+events_unbound	07:29:17	5
1563448	99	37	35,2	cyclictest	1801944	-21	kworker/u16:0+events_unbound	05:33:24	5
1563448	99	37	35,2	cyclictest	1585997	-21	kworker/u16:2+flush-8:0	04:29:06	5
1563448	99	37	34,2	cyclictest	1640243	-21	kworker/u16:3+flush-8:0	04:09:03	5
1563441	99	37	35,2	cyclictest	2164488	-21	kworker/u16:5+flush-8:0	08:37:40	4
1563441	99	37	35,2	cyclictest	1508590	-21	kworker/u16:4+events_unbound	04:09:53	4
1563453	99	36	34,1	cyclictest	0	-21	swapper/7	06:49:07	7
1563453	99	36	29,5	cyclictest	589235	-21	systemd-journal	08:28:49	7
1563448	99	36	34,2	cyclictest	2066715	-21	kworker/u16:2+events_unbound	07:54:22	5
1563448	99	36	34,2	cyclictest	1738737	-21	kworker/u16:3+flush-8:0	06:04:20	5
1563441	99	36	34,2	cyclictest	2135024	-21	kworker/u16:4+flush-8:0	08:54:19	4
1563441	99	36	34,2	cyclictest	1585997	-21	kworker/u16:2+flush-8:0	05:04:16	4
1563441	99	36	33,2	cyclictest	1655462	-21	kworker/u16:1+flush-8:0	04:59:07	4
1563063	2	36	26,7	sleep6	0	-21	swapper/6	03:27:59	6
1563448	99	35	33,2	cyclictest	2095968	-21	kworker/u16:3+events_unbound	08:19:17	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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