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 16, 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
3270565	99	45	41,3	cyclictest	124	-21	kswapd0	11:23:07	7
3270270	2	44	33,8	sleep5	0	-21	swapper/5	07:07:49	5
3270563	99	43	41,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	10:18:25	6
3270563	99	43	40,2	cyclictest	3831718	-21	kworker/u16:2+events_unbound	12:17:55	6
3270563	99	40	38,2	cyclictest	3554165	-21	kworker/u16:1+flush-8:0	09:41:13	6
3270563	99	40	34,6	cyclictest	3495105	-21	kworker/u16:2+events_unbound	09:15:08	6
3270559	99	40	38,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	10:15:51	5
3270563	99	39	37,2	cyclictest	3675740	-21	kworker/u16:2+events_unbound	10:37:36	6
3270563	99	39	37,2	cyclictest	3438004	-21	kworker/u16:3+events_unbound	09:20:36	6
3270559	99	39	36,2	cyclictest	3809590	-21	kworker/u16:1+events_unbound	11:12:55	5
3270554	99	39	36,2	cyclictest	3614679	-21	kworker/u16:4+flush-8:0	10:57:53	4
3270196	2	39	4,30	sleep7	0	-21	swapper/7	07:06:46	7
3270563	99	38	36,2	cyclictest	3831718	-21	kworker/u16:2+events_unbound	12:30:38	6
3270563	99	38	36,2	cyclictest	3809590	-21	kworker/u16:1+events_unbound	11:21:48	6
3270563	99	38	36,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	10:41:15	6
3270563	99	38	36,2	cyclictest	3614679	-21	kworker/u16:4+events_unbound	10:11:23	6
3270563	99	38	36,2	cyclictest	3495105	-21	kworker/u16:2+events_unbound	09:25:20	6
3270559	99	38	36,2	cyclictest	3968085	-21	kworker/u16:0+events_unbound	12:25:27	5
3270559	99	38	36,2	cyclictest	3883384	-21	kworker/u16:0+flush-8:0	11:54:35	5
3270559	99	38	36,2	cyclictest	3868466	-21	kworker/u16:1+events_unbound	11:40:32	5
3270565	99	37	35,1	cyclictest	0	-21	swapper/7	09:04:24	7
3270563	99	37	35,2	cyclictest	3883384	-21	kworker/u16:0+events_unbound	11:46:39	6
3270563	99	37	35,2	cyclictest	3749235	-21	kworker/u16:5+events_unbound	10:57:44	6
3270563	99	37	35,2	cyclictest	3614679	-21	kworker/u16:4+flush-8:0	11:08:16	6
3270563	99	37	35,2	cyclictest	3587864	-21	kworker/u16:2+events_unbound	09:46:44	6
3270563	99	37	35,2	cyclictest	3554165	-21	kworker/u16:1+events_unbound	09:36:44	6
3270559	99	37	35,2	cyclictest	3883384	-21	kworker/u16:0+events_unbound	11:51:27	5
3270559	99	37	35,2	cyclictest	3868466	-21	kworker/u16:1+events_unbound	11:37:24	5
3270559	99	37	35,2	cyclictest	3844003	-21	kworker/u16:3+events_unbound	11:28:35	5
3270563	99	36	34,2	cyclictest	3968085	-21	kworker/u16:0+events_unbound	12:33:55	6
3270563	99	36	34,2	cyclictest	3883384	-21	kworker/u16:0+flush-8:0	11:52:47	6
3270563	99	36	34,2	cyclictest	3809590	-21	kworker/u16:1+events_unbound	11:14:11	6
3270563	99	36	34,2	cyclictest	3675740	-21	kworker/u16:2+events_unbound	11:04:11	6
3270563	99	36	33,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	10:52:20	6
3270563	99	36	29,7	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:51:09	6
3270559	99	36	34,2	cyclictest	3883384	-21	kworker/u16:0+events_unbound	12:00:40	5
3270559	99	36	34,2	cyclictest	3831718	-21	kworker/u16:2+events_unbound	12:09:55	5
3270559	99	36	34,2	cyclictest	3749235	-21	kworker/u16:5+events_unbound	10:53:20	5
3270559	99	36	34,2	cyclictest	3614679	-21	kworker/u16:4+events_unbound	09:53:52	5
3270559	99	36	34,2	cyclictest	3495105	-21	kworker/u16:2+events_unbound	09:24:31	5
3968098	2	35	0,1	chrt	0	-21	swapper/6	12:17:53	6
3968098	2	35	0,1	chrt	0	-21	swapper/6	12:17:53	6
3270563	99	35	33,2	cyclictest	3844003	-21	kworker/u16:3+flush-8:0	11:35:59	6
3270563	99	35	33,2	cyclictest	3831718	-21	kworker/u16:2+events_unbound	12:09:59	6
3270563	99	35	33,2	cyclictest	3831718	-21	kworker/u16:2+events_unbound	11:40:08	6
3270563	99	35	33,2	cyclictest	3675740	-21	kworker/u16:2+events_unbound	10:26:55	6
3270563	99	35	33,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:32:47	6
3270563	99	35	33,2	cyclictest	3495105	-21	kworker/u16:2+flush-8:0	09:09:28	6
3270559	99	35	33,2	cyclictest	3968085	-21	kworker/u16:0+events_unbound	12:29:23	5
3270559	99	35	33,2	cyclictest	3870859	-21	kworker/u16:4+events_unbound	11:45:15	5
3270559	99	35	33,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:26:08	5
3270559	99	35	33,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:05:59	5
3270559	99	35	33,2	cyclictest	3279743	-21	kworker/u16:1+events_unbound	07:35:36	5
3270078	2	35	25,7	sleep4	0	-21	swapper/4	07:05:07	4
3270565	99	34	33,0	cyclictest	0	-21	swapper/7	11:38:15	7
3270565	99	34	33,0	cyclictest	0	-21	swapper/7	09:43:31	7
3270563	99	34	32,2	cyclictest	3941388	-21	kworker/u16:1+events_unbound	12:04:15	6
3270563	99	34	32,2	cyclictest	3830784	-21	kworker/u16:0+events_unbound	11:32:27	6
3270563	99	34	32,2	cyclictest	3529598	-21	kworker/u16:0+flush-8:0	10:05:11	6
3270559	99	34	32,2	cyclictest	3921184	-21	kworker/u16:3+events_unbound	12:16:43	5
3270559	99	34	32,2	cyclictest	3921184	-21	kworker/u16:3+events_unbound	12:16:43	5
3270559	99	34	32,2	cyclictest	3614679	-21	kworker/u16:4+events_unbound	10:52:00	5
3270559	99	34	32,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:39:28	5
3270559	99	34	32,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:36:40	5
3270559	99	34	32,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:29:40	5
3270559	99	34	32,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:29:40	5
3270559	99	34	32,2	cyclictest	3438004	-21	kworker/u16:3+events_unbound	09:15:51	5
3270565	99	33	31,1	cyclictest	3868580	-21	ssh	11:34:03	7
3270565	99	33	31,1	cyclictest	3783035	-21	ssh	10:58:35	7
3270565	99	33	28,4	cyclictest	3651307	-21	latency_hist	10:07:54	7
3270563	99	33	31,2	cyclictest	3883384	-21	kworker/u16:0+events_unbound	11:54:07	6
3270559	99	33	31,2	cyclictest	3968085	-21	kworker/u16:0+events_unbound	12:34:20	5
3270559	99	33	31,2	cyclictest	3844003	-21	kworker/u16:3+events_unbound	11:26:59	5
3270559	99	33	31,2	cyclictest	3749235	-21	kworker/u16:5+events_unbound	11:07:11	5
3270559	99	33	31,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	10:00:11	5
3270559	99	33	31,2	cyclictest	3614679	-21	kworker/u16:4+events_unbound	10:12:37	5
3270559	99	33	31,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:42:12	5
3270559	99	33	31,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	09:49:32	5
3270559	99	33	31,2	cyclictest	3331739	-21	kworker/u16:2+flush-8:0	07:58:19	5
3270559	99	33	31,2	cyclictest	3293117	-21	kworker/u16:3+events_unbound	08:10:35	5
3270559	99	33	31,2	cyclictest	3293117	-21	kworker/u16:3+events_unbound	08:10:35	5
3270554	99	33	31,2	cyclictest	3968085	-21	kworker/u16:0+events_unbound	12:33:08	4
3270554	99	33	30,2	cyclictest	3921184	-21	kworker/u16:3+events_unbound	12:23:08	4
3270563	99	32	30,2	cyclictest	3626965	-21	kworker/u16:1+events_unbound	09:59:12	6
3270559	99	32	30,2	cyclictest	3749235	-21	kworker/u16:5+events_unbound	11:09:43	5
3270559	99	32	30,2	cyclictest	3626965	-21	kworker/u16:1+flush-8:0	10:45:07	5
3270559	99	32	30,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:32:33	5
3270563	99	31	29,2	cyclictest	3831718	-21	kworker/u16:2+flush-8:0	11:58:40	6
3270563	99	31	29,2	cyclictest	3614679	-21	kworker/u16:4+flush-8:0	10:13:31	6
3270563	99	31	29,2	cyclictest	3418071	-21	kworker/u16:0+events_unbound	08:47:35	6
3270563	99	31	29,2	cyclictest	3293117	-21	kworker/u16:3+events_unbound	08:03:27	6
3270559	99	31	29,2	cyclictest	3941388	-21	kworker/u16:1+events_unbound	12:04:48	5
3270559	99	31	29,2	cyclictest	3749235	-21	kworker/u16:5+flush-8:0	11:01:51	5
3270559	99	31	29,2	cyclictest	3614679	-21	kworker/u16:4+events_unbound	10:19:37	5
3270559	99	31	29,2	cyclictest	3438004	-21	kworker/u16:3+events_unbound	09:12:16	5
3269997	2	31	21,7	sleep6	0	-21	swapper/6	07:03:57	6
3270565	99	30	29,0	cyclictest	0	-21	swapper/7	11:09:04	7
3270565	99	30	29,0	cyclictest	0	-21	swapper/7	08:33:11	7
3270563	99	30	28,2	cyclictest	3830784	-21	kworker/u16:0+events_unbound	11:24:56	6
3270563	99	30	28,2	cyclictest	3529598	-21	kworker/u16:0+events_unbound	10:44:15	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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