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 50 highest latencies:

System rack0slot2.osadl.org (updated Sun May 31, 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
1684397	99	62	60,2	cyclictest	2268560	-21	kworker/u16:3+events_unbound	12:27:19	5
1684016	2	58	48,7	sleep4	0	-21	swapper/4	07:05:37	4
1684397	99	57	55,2	cyclictest	2341130	-21	kworker/u16:2+events_unbound	12:02:12	5
1684397	99	54	52,2	cyclictest	2169454	-21	kworker/u16:5+flush-8:0	11:52:23	5
1684397	99	53	51,2	cyclictest	972153	-21	kworker/u16:2+flush-8:0	11:42:09	5
1683865	2	53	42,7	sleep5	0	-21	swapper/5	07:03:30	5
1684397	99	51	49,2	cyclictest	2305954	-21	kworker/u16:0+events_unbound	12:32:26	5
1684397	99	51	49,2	cyclictest	2124041	-21	kworker/u16:0+events_unbound	11:27:11	5
1684397	99	51	49,2	cyclictest	2124041	-21	kworker/u16:0+events_unbound	11:12:26	5
1684409	99	48	46,1	cyclictest	1918623	-21	diskmemload	12:07:27	7
1684409	99	48	46,1	cyclictest	1918623	-21	diskmemload	12:07:27	7
1684395	99	47	44,2	cyclictest	2124041	-21	kworker/u16:0+flush-8:0	11:03:33	4
1684397	99	46	43,2	cyclictest	2124041	-21	kworker/u16:0+events_unbound	11:22:08	5
1684409	99	45	41,2	cyclictest	2350481	-21	users	12:02:30	7
1684397	99	45	43,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	11:47:23	5
1684395	99	45	43,2	cyclictest	1752622	-21	kworker/u16:1+flush-8:0	08:16:54	4
1684409	99	42	39,2	cyclictest	2294732	-21	kthreadcore	11:42:12	7
1684397	99	41	39,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	11:19:12	5
1684397	99	41	39,2	cyclictest	2169454	-21	kworker/u16:5+events_unbound	11:02:22	5
1684395	99	41	38,2	cyclictest	972153	-21	kworker/u16:2+flush-8:0	08:26:54	4
1684397	99	40	38,2	cyclictest	2305954	-21	kworker/u16:0+events_unbound	11:57:13	5
1684397	99	40	38,2	cyclictest	2268560	-21	kworker/u16:3+events_unbound	12:14:43	5
1684397	99	40	38,2	cyclictest	1880200	-21	kworker/u16:0+events_unbound	09:34:29	5
1684397	99	40	37,2	cyclictest	1752622	-21	kworker/u16:1+flush-8:0	08:17:21	5
1684409	99	38	0,36	cyclictest	1940811	-21	ssh	09:13:29	7
1684409	99	38	0,36	cyclictest	1930593	-21	latency_hist	09:11:54	7
1684397	99	38	36,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	09:15:36	5
1684397	99	38	36,2	cyclictest	2305954	-21	kworker/u16:0+events_unbound	12:10:23	5
1684397	99	38	36,2	cyclictest	2305954	-21	kworker/u16:0+events_unbound	12:10:23	5
1684397	99	38	36,2	cyclictest	2268560	-21	kworker/u16:3+events_unbound	12:22:12	5
1684397	99	38	36,2	cyclictest	1880200	-21	kworker/u16:0+events_unbound	09:58:08	5
1684397	99	38	35,2	cyclictest	2124041	-21	kworker/u16:0+events_unbound	10:52:36	5
1680015	2	38	2,30	sleep7	0	-21	swapper/7	07:02:19	7
1684409	99	37	34,2	cyclictest	2414065	-21	df	12:32:08	7
1684397	99	37	35,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	10:43:31	5
1684397	99	37	35,2	cyclictest	2365102	-21	kworker/u16:1+events_unbound	12:20:40	5
1684397	99	37	35,2	cyclictest	2268560	-21	kworker/u16:3+events_unbound	11:33:15	5
1684397	99	37	35,2	cyclictest	2024440	-21	kworker/u16:1+events_unbound	10:18:24	5
1684397	99	37	35,2	cyclictest	1880200	-21	kworker/u16:0+events_unbound	10:03:13	5
1684397	99	37	35,2	cyclictest	1880200	-21	kworker/u16:0+events_unbound	09:08:49	5
1684395	99	37	35,2	cyclictest	2268560	-21	kworker/u16:3+events_unbound	12:21:54	4
1684397	99	36	34,2	cyclictest	972153	-21	kworker/u16:2+flush-8:0	10:35:56	5
1684397	99	36	34,2	cyclictest	972153	-21	kworker/u16:2+flush-8:0	07:07:23	5
1684397	99	36	34,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	11:01:16	5
1684397	99	36	34,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	09:48:53	5
1684397	99	36	34,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	08:36:56	5
1684397	99	36	34,2	cyclictest	2169454	-21	kworker/u16:5+events_unbound	10:50:09	5
1684397	99	36	34,2	cyclictest	2169454	-21	kworker/u16:5+events_unbound	10:50:09	5
1684397	99	36	32,2	cyclictest	1880200	-21	kworker/u16:0+events_unbound	09:28:20	5
1684397	99	35	33,2	cyclictest	972153	-21	kworker/u16:2+events_unbound	10:38:45	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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