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 May 23, 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
4088904	2	60	50,7	sleep5	0	-21	swapper/5	07:06:22	5
4089282	99	47	0,45	cyclictest	6063	-21	gdbus	09:57:08	7
4089282	99	47	0,45	cyclictest	6063	-21	gdbus	09:57:08	7
4088819	2	45	34,8	sleep4	0	-21	swapper/4	07:05:09	4
4089282	99	43	37,5	cyclictest	130023	-21	latency_hist	09:07:26	7
4089279	99	42	40,2	cyclictest	4150487	-21	kworker/u16:2+flush-8:0	07:42:52	6
4089282	99	41	40,0	cyclictest	0	-21	swapper/7	12:02:28	7
4087987	2	40	2,31	sleep7	0	-21	swapper/7	07:02:55	7
4089282	99	37	35,1	cyclictest	505134	-21	ssh	11:39:35	7
4089282	99	37	35,1	cyclictest	275043	-21	ssh	10:05:56	7
4089282	99	37	35,1	cyclictest	130025	-21	diskmemload	10:30:20	7
4089282	99	35	32,2	cyclictest	124	-21	kswapd0	12:15:48	7
4089282	99	34	33,0	cyclictest	0	-21	swapper/7	10:49:56	7
4089282	99	34	32,1	cyclictest	130025	-21	diskmemload	11:22:52	7
4089282	99	34	31,2	cyclictest	81052	-21	ntpq	08:37:50	7
4089282	99	33	32,0	cyclictest	0	-21	swapper/7	12:31:36	7
4089282	99	33	32,0	cyclictest	0	-21	swapper/7	11:17:24	7
4089282	99	33	32,0	cyclictest	0	-21	swapper/7	11:17:24	7
4089282	99	33	31,1	cyclictest	130025	-21	diskmemload	09:22:04	7
4089282	99	31	30,0	cyclictest	0	-21	swapper/7	11:53:35	7
4089282	99	31	30,0	cyclictest	0	-21	swapper/7	11:53:35	7
4089282	99	31	30,0	cyclictest	0	-21	swapper/7	11:20:08	7
4089282	99	31	30,0	cyclictest	0	-21	swapper/7	08:49:37	7
4089282	99	31	29,1	cyclictest	130025	-21	diskmemload	10:08:48	7
4089282	99	31	29,1	cyclictest	130025	-21	diskmemload	09:37:20	7
4089282	99	31	29,1	cyclictest	130025	-21	diskmemload	09:10:16	7
4089282	99	31	29,1	cyclictest	0	-21	swapper/7	09:48:36	7
4089282	99	31	27,2	cyclictest	298130	-21	ssh	10:13:32	7
4089279	99	31	29,2	cyclictest	567359	-21	kworker/u16:4+events_unbound	12:29:36	6
4089279	99	31	29,2	cyclictest	224815	-21	kworker/u16:4+flush-8:0	10:12:41	6
4089282	99	30	29,0	cyclictest	0	-21	swapper/7	09:41:27	7
4089279	99	30	28,2	cyclictest	119466	-21	kworker/u16:2+events_unbound	10:42:56	6
4089282	99	29	28,0	cyclictest	0	-21	swapper/7	11:45:11	7
4089282	99	29	27,1	cyclictest	130025	-21	diskmemload	10:00:28	7
4089282	99	29	27,1	cyclictest	0	-21	swapper/7	10:58:48	7
4089279	99	29	27,2	cyclictest	349191	-21	kworker/u16:0+events_unbound	11:42:15	6
4089282	99	28	27,0	cyclictest	0	-21	swapper/7	12:25:27	7
4089282	99	28	27,0	cyclictest	0	-21	swapper/7	10:41:07	7
4089282	99	28	26,1	cyclictest	0	-21	swapper/7	11:28:35	7
4089279	99	28	25,3	cyclictest	119466	-21	kworker/u16:2+flush-8:0	09:07:52	6
4089279	99	28	25,2	cyclictest	119466	-21	kworker/u16:2+events_unbound	11:17:26	6
4089279	99	28	22,6	cyclictest	119466	-21	kworker/u16:2+flush-8:0	10:05:16	6
4089282	99	27	26,0	cyclictest	0	-21	swapper/7	09:31:52	7
4089282	99	27	25,1	cyclictest	553667	-21	ssh	11:59:48	7
4089282	99	27	24,2	cyclictest	153329	-21	sh	09:15:35	7
4089282	99	27	24,2	cyclictest	153329	-21	sh	09:15:35	7
4089279	99	27	25,2	cyclictest	81675	-21	kworker/u16:3+events_unbound	08:56:33	6
4089279	99	27	25,2	cyclictest	53123	-21	kworker/u16:0+events_unbound	08:44:32	6
4089279	99	27	25,2	cyclictest	4150487	-21	kworker/u16:2+events_unbound	08:21:23	6
4089279	99	27	25,2	cyclictest	4097802	-21	kworker/u16:4+events_unbound	08:11:40	6
4089279	99	27	25,2	cyclictest	394215	-21	kworker/u16:1+events_unbound	11:01:28	6
4089279	99	27	25,2	cyclictest	24319	-21	kworker/u16:1+events_unbound	08:37:24	6
4089279	99	27	25,2	cyclictest	24319	-21	kworker/u16:1+events_unbound	08:37:24	6
4089279	99	27	25,2	cyclictest	24319	-21	kworker/u16:1+events_unbound	08:17:07	6
4088850	2	27	17,7	sleep6	0	-21	swapper/6	07:05:35	6
4089282	99	26	25,0	cyclictest	0	-21	swapper/7	12:17:31	7
4089282	99	26	25,0	cyclictest	0	-21	swapper/7	10:34:32	7
4089282	99	26	25,0	cyclictest	0	-21	swapper/7	10:34:32	7
4089282	99	26	25,0	cyclictest	0	-21	swapper/7	09:47:08	7
4089282	99	26	25,0	cyclictest	0	-21	swapper/7	07:11:37	7
4089282	99	26	24,1	cyclictest	130025	-21	diskmemload	09:24:43	7
4089282	99	26	24,1	cyclictest	1234	-21	snmpd	12:36:07	7
4089282	99	26	24,1	cyclictest	1234	-21	snmpd	12:36:07	7
4089279	99	26	24,2	cyclictest	91384	-21	kworker/u16:1+events_unbound	08:51:32	6
4089279	99	26	24,2	cyclictest	4089012	-21	kworker/u16:3+flush-8:0	07:07:41	6
4089279	99	26	24,2	cyclictest	224815	-21	kworker/u16:4+flush-8:0	10:28:59	6
4089279	99	26	24,2	cyclictest	224815	-21	kworker/u16:4+events_unbound	10:49:41	6
4089279	99	26	24,2	cyclictest	212610	-21	kworker/u16:0+flush-8:0	10:19:18	6
4089282	99	25	24,0	cyclictest	0	-21	swapper/7	08:16:37	7
4089282	99	25	23,1	cyclictest	371642	-21	ssh	10:44:49	7
4089279	99	25	23,2	cyclictest	516528	-21	kworker/u16:2+events_unbound	12:21:41	6
4089279	99	25	23,2	cyclictest	4111803	-21	kworker/u16:1+events_unbound	07:34:21	6
4089279	99	25	23,2	cyclictest	349191	-21	kworker/u16:0+events_unbound	12:27:18	6
4089279	99	25	23,2	cyclictest	24319	-21	kworker/u16:1+events_unbound	08:31:01	6
4089279	99	25	23,2	cyclictest	224815	-21	kworker/u16:4+events_unbound	10:38:36	6
4089282	99	24	23,0	cyclictest	0	-21	swapper/7	08:57:22	7
4089282	99	24	23,0	cyclictest	0	-21	swapper/7	08:26:37	7
4089279	99	24	22,2	cyclictest	555099	-21	kworker/u16:3+events_unbound	12:05:46	6
4089279	99	24	22,2	cyclictest	4097802	-21	kworker/u16:4+flush-8:0	08:06:24	6
4089279	99	24	22,2	cyclictest	212610	-21	kworker/u16:0+events_unbound	10:27:20	6
4089279	99	24	22,2	cyclictest	119466	-21	kworker/u16:2+events_unbound	09:18:07	6
4089279	99	24	22,2	cyclictest	119466	-21	kworker/u16:2+events_unbound	09:04:32	6
4089282	99	23	21,1	cyclictest	311668	-21	ssh	10:21:07	7
4089279	99	23	21,2	cyclictest	567359	-21	kworker/u16:4+events_unbound	12:33:09	6
4089279	99	23	21,2	cyclictest	567359	-21	kworker/u16:4+events_unbound	12:33:09	6
4089279	99	23	21,2	cyclictest	4097802	-21	kworker/u16:4+events_unbound	07:16:40	6
4089279	99	23	21,2	cyclictest	24319	-21	kworker/u16:1+events_unbound	08:23:45	6
4089279	99	23	21,2	cyclictest	119466	-21	kworker/u16:2+flush-8:0	11:09:05	6
4089279	99	23	21,2	cyclictest	119466	-21	kworker/u16:2+events_unbound	09:49:45	6
4089279	99	23	17,6	cyclictest	409604	-21	kworker/u16:3+events_unbound	11:33:15	6
4089282	99	22	21,0	cyclictest	0	-21	swapper/7	11:34:26	7
4089282	99	22	21,0	cyclictest	0	-21	swapper/7	11:08:52	7
4089282	99	22	21,0	cyclictest	0	-21	swapper/7	08:36:36	7
4089282	99	22	21,0	cyclictest	0	-21	swapper/7	08:36:36	7
4089282	99	22	21,0	cyclictest	0	-21	swapper/7	07:53:36	7
4089282	99	22	20,1	cyclictest	14793	-21	perf	08:07:26	7
4089282	99	22	16,5	cyclictest	120388	-21	latency_hist	09:02:27	7
4089279	99	22	20,2	cyclictest	53123	-21	kworker/u16:0+events_unbound	08:59:04	6
4089279	99	22	20,2	cyclictest	516528	-21	kworker/u16:2+events_unbound	12:16:05	6
4089279	99	22	20,2	cyclictest	4150487	-21	kworker/u16:2+events_unbound	08:38:37	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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