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 Sat Jan 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
1060617	2	96	0,1	sleep4	0	-21	swapper/4	11:52:00	4
878088	2	65	0,1	sleep5	0	-21	swapper/5	10:36:59	5
416770	2	55	45,7	sleep6	0	-21	swapper/6	07:06:25	6
416677	2	55	21,30	sleep7	0	-21	swapper/7	07:05:06	7
417088	99	51	49,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	11:04:43	5
416742	2	51	41,7	sleep5	0	-21	swapper/5	07:06:00	5
417088	99	50	48,2	cyclictest	821271	-21	kworker/u16:0+flush-8:0	10:16:54	5
417088	99	50	48,2	cyclictest	418067	-21	kworker/u16:2+flush-8:0	09:22:08	5
417088	99	48	46,2	cyclictest	835181	-21	kworker/u16:2+flush-8:0	10:31:53	5
417088	99	48	46,2	cyclictest	546151	-21	kworker/u16:3+flush-8:0	09:16:53	5
417088	99	47	45,2	cyclictest	546151	-21	kworker/u16:3+events_unbound	09:31:53	5
417088	99	47	45,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	09:51:53	5
417088	99	47	45,2	cyclictest	3897039	-21	kworker/u16:3+events_unbound	07:22:09	5
417084	99	47	43,3	cyclictest	546151	-21	kworker/u16:3+flush-8:0	08:36:38	4
417094	99	46	44,1	cyclictest	652488	-21	diskmemload	10:57:06	7
417094	99	46	44,1	cyclictest	652488	-21	diskmemload	10:57:06	7
417088	99	46	44,2	cyclictest	944669	-21	kworker/u16:4+events_unbound	11:22:07	5
407585	2	46	35,7	sleep4	0	-21	swapper/4	07:01:50	4
417094	99	45	43,1	cyclictest	1140496	-21	irqcore	12:26:54	7
417088	99	45	43,2	cyclictest	774237	-21	kworker/u16:5+events_unbound	10:22:11	5
417088	99	44	42,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	09:36:54	5
417088	99	44	42,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	09:36:54	5
417084	99	44	42,2	cyclictest	774237	-21	kworker/u16:5+flush-8:0	10:47:07	4
417088	99	43	41,2	cyclictest	821271	-21	kworker/u16:0+flush-8:0	12:07:08	5
417088	99	43	41,2	cyclictest	546151	-21	kworker/u16:3+events_unbound	09:27:00	5
417088	99	43	41,2	cyclictest	1078790	-21	kworker/u16:1+events_unbound	12:22:10	5
417094	99	42	40,1	cyclictest	735544	-21	ssh	09:37:39	7
417094	99	42	40,1	cyclictest	735544	-21	ssh	09:37:39	7
417088	99	42	40,2	cyclictest	821271	-21	kworker/u16:0+events_unbound	11:57:04	5
417088	99	42	40,2	cyclictest	1078790	-21	kworker/u16:1+events_unbound	12:16:52	5
417088	99	42	40,2	cyclictest	1078790	-21	kworker/u16:1+events_unbound	12:16:52	5
417094	99	41	38,2	cyclictest	884870	-21	tune2fs	10:41:53	7
417094	99	41	37,2	cyclictest	1051180	-21	smart_sda	11:47:11	7
417088	99	41	39,2	cyclictest	821271	-21	kworker/u16:0+events_unbound	12:02:05	5
417088	99	41	39,2	cyclictest	546151	-21	kworker/u16:3+flush-8:0	09:06:53	5
417088	99	41	39,2	cyclictest	3897039	-21	kworker/u16:3+flush-8:0	07:12:06	5
417094	99	40	38,1	cyclictest	507533	-21	perf	07:51:38	7
417088	99	40	38,2	cyclictest	835181	-21	kworker/u16:2+events_unbound	10:47:06	5
417088	99	40	38,2	cyclictest	835181	-21	kworker/u16:2+events_unbound	10:42:05	5
417088	99	40	38,2	cyclictest	526901	-21	kworker/u16:0+events_unbound	08:07:08	5
417084	99	40	38,2	cyclictest	418067	-21	kworker/u16:2+events_unbound	08:47:08	4
417088	99	39	37,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	11:12:14	5
417088	99	39	37,2	cyclictest	821271	-21	kworker/u16:0+flush-8:0	11:32:08	5
417088	99	39	37,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	09:44:55	5
417088	99	39	37,2	cyclictest	3897039	-21	kworker/u16:3+flush-8:0	07:32:06	5
417088	99	39	37,2	cyclictest	3897039	-21	kworker/u16:3+flush-8:0	07:32:06	5
417088	99	39	36,3	cyclictest	821271	-21	kworker/u16:0+flush-8:0	11:17:06	5
417088	99	39	36,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	10:08:12	5
417084	99	39	37,2	cyclictest	1078790	-21	kworker/u16:1+flush-8:0	12:32:07	4
417084	99	39	36,2	cyclictest	498109	-21	kworker/u16:1+flush-8:0	09:41:56	4
417094	99	38	36,1	cyclictest	944265	-21	ssh	11:05:59	7
417094	99	38	36,1	cyclictest	652488	-21	diskmemload	10:54:55	7
417094	99	38	36,1	cyclictest	0	-21	swapper/7	11:31:43	7
417088	99	38	36,2	cyclictest	944669	-21	kworker/u16:4+events_unbound	12:30:07	5
417088	99	38	36,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	11:11:04	5
417088	99	38	36,2	cyclictest	774236	-21	kworker/u16:4+events_unbound	10:13:02	5
417088	99	37	35,2	cyclictest	908158	-21	kworker/u16:3+flush-8:0	11:41:54	5
417088	99	37	35,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	11:26:56	5
417088	99	37	35,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	10:52:48	5
417088	99	37	35,2	cyclictest	759658	-21	kworker/u16:0+events_unbound	09:47:59	5
417088	99	37	35,2	cyclictest	546151	-21	kworker/u16:3+events_unbound	09:14:24	5
417088	99	37	34,3	cyclictest	388044	-21	kworker/u16:0+flush-8:0	07:17:06	5
417088	99	37	34,2	cyclictest	418067	-21	kworker/u16:2+events_unbound	08:56:39	5
417084	99	37	34,2	cyclictest	835181	-21	kworker/u16:2+events_unbound	10:26:40	4
417084	99	37	34,2	cyclictest	774237	-21	kworker/u16:5+events_unbound	10:36:52	4
417094	99	36	34,1	cyclictest	652488	-21	diskmemload	10:12:28	7
417088	99	36	34,2	cyclictest	944669	-21	kworker/u16:4+events_unbound	12:15:20	5
417088	99	36	34,2	cyclictest	908158	-21	kworker/u16:3+events_unbound	11:41:04	5
417088	99	36	34,2	cyclictest	774237	-21	kworker/u16:5+events_unbound	10:28:04	5
417084	99	36	34,2	cyclictest	944669	-21	kworker/u16:4+events_unbound	11:12:03	4
417094	99	35	33,1	cyclictest	992176	-21	ssh	11:24:43	7
417094	99	35	33,1	cyclictest	652488	-21	diskmemload	10:49:23	7
417094	99	35	33,1	cyclictest	652488	-21	diskmemload	09:32:27	7
417094	99	35	32,2	cyclictest	1161962	-21	ssh	12:34:06	7
417094	99	35	31,3	cyclictest	674997	-21	sh	09:13:19	7
417088	99	35	33,2	cyclictest	835181	-21	kworker/u16:2+events_unbound	10:57:19	5
417088	99	35	33,2	cyclictest	835181	-21	kworker/u16:2+events_unbound	10:57:19	5
417088	99	35	33,2	cyclictest	821271	-21	kworker/u16:0+flush-8:0	11:52:19	5
417088	99	35	33,2	cyclictest	759658	-21	kworker/u16:0+events_unbound	09:59:56	5
417088	99	35	33,2	cyclictest	3897039	-21	kworker/u16:3+flush-8:0	07:42:05	5
417084	99	35	33,2	cyclictest	774237	-21	kworker/u16:5+flush-8:0	10:17:07	4
417084	99	35	32,2	cyclictest	944669	-21	kworker/u16:4+flush-8:0	11:26:54	4
417094	99	34	28,5	cyclictest	468944	-21	latency_hist	07:31:38	7
417088	99	34	32,2	cyclictest	944669	-21	kworker/u16:4+events_unbound	12:35:00	5
417088	99	34	32,2	cyclictest	821271	-21	kworker/u16:0+events_unbound	11:47:09	5
417088	99	34	32,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	10:04:59	5
417084	99	34	32,2	cyclictest	1078790	-21	kworker/u16:1+flush-8:0	12:21:57	4
417094	99	33	33,0	cyclictest	0	-21	swapper/7	10:39:48	7
417094	99	33	31,1	cyclictest	652488	-21	diskmemload	11:39:15	7
417094	99	33	31,1	cyclictest	1087882	-21	wc	12:02:10	7
497094	2	32	0,1	chrt	497095	-21	switchtime	07:42:07	7
417094	99	32	32,0	cyclictest	0	-21	swapper/7	11:12:31	7
417094	99	32	32,0	cyclictest	0	-21	swapper/7	09:29:31	7
417094	99	32	31,1	cyclictest	796389	-21	ssh	10:02:40	7
417094	99	32	31,0	cyclictest	0	-21	swapper/7	10:06:39	7
417094	99	32	30,1	cyclictest	652488	-21	diskmemload	12:20:23	7
417094	99	32	30,1	cyclictest	652488	-21	diskmemload	12:20:23	7
417094	99	32	30,1	cyclictest	652488	-21	diskmemload	11:58:39	7
417088	99	32	30,2	cyclictest	498109	-21	kworker/u16:1+events_unbound	08:46:51	5
417084	99	32	31,1	cyclictest	418067	-21	kworker/u16:2+flush-8:0	08:01:55	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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