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 Jun 27, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3892990	2	56	46,7	sleep5	0	-21	swapper/5	07:06:58	5
3883884	2	44	33,7	sleep4	0	-21	swapper/4	07:04:25	4
3893472	99	43	39,3	cyclictest	36781	-21	kworker/u16:1+flush-8:0	09:59:19	6
3892880	2	43	5,32	sleep7	0	-21	swapper/7	07:05:24	7
3893466	99	40	38,2	cyclictest	3845280	-21	kworker/u16:4+flush-8:0	07:29:35	5
3893466	99	39	37,2	cyclictest	318464	-21	kworker/u16:0+events_unbound	11:47:11	5
3893466	99	38	36,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	10:42:59	5
3893466	99	38	36,2	cyclictest	4101690	-21	kworker/u16:4+events_unbound	09:39:58	5
3893466	99	38	36,2	cyclictest	160869	-21	kworker/u16:2+events_unbound	10:50:46	5
3893466	99	37	35,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	11:10:25	5
3893466	99	37	35,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	09:55:59	5
3893466	99	37	35,2	cyclictest	4101690	-21	kworker/u16:4+events_unbound	09:29:03	5
3893466	99	37	35,2	cyclictest	333339	-21	kworker/u16:1+events_unbound	12:30:22	5
3893466	99	37	35,2	cyclictest	318464	-21	kworker/u16:0+events_unbound	11:43:22	5
3893466	99	37	35,2	cyclictest	271585	-21	kworker/u16:4+events_unbound	12:05:31	5
3893466	99	37	35,2	cyclictest	135666	-21	kworker/u16:4+events_unbound	11:06:46	5
3893466	99	37	34,2	cyclictest	333339	-21	kworker/u16:1+events_unbound	12:19:22	5
3893466	99	37	34,2	cyclictest	333339	-21	kworker/u16:1+events_unbound	12:19:22	5
3893466	99	36	34,2	cyclictest	4192812	-21	kworker/u16:0+flush-8:0	10:15:18	5
3893466	99	36	34,2	cyclictest	271585	-21	kworker/u16:4+events_unbound	12:35:31	5
3893466	99	36	34,2	cyclictest	271585	-21	kworker/u16:4+events_unbound	12:16:26	5
3893466	99	36	34,2	cyclictest	135666	-21	kworker/u16:4+events_unbound	10:32:10	5
3893466	99	36	34,2	cyclictest	10369	-21	kworker/u16:2+events_unbound	09:47:23	5
3893466	99	36	33,2	cyclictest	318464	-21	kworker/u16:0+events_unbound	11:59:22	5
3893466	99	35	33,2	cyclictest	97689	-21	kworker/u16:1+events_unbound	10:39:05	5
3893466	99	35	33,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	09:53:54	5
3893466	99	35	33,2	cyclictest	4155945	-21	kworker/u16:5+flush-8:0	09:22:46	5
3893466	99	35	33,2	cyclictest	4101690	-21	kworker/u16:4+flush-8:0	09:30:27	5
3893466	99	35	33,2	cyclictest	4087617	-21	kworker/u16:0+flush-8:0	08:54:47	5
3893466	99	35	33,2	cyclictest	4087617	-21	kworker/u16:0+flush-8:0	08:54:47	5
3893466	99	35	33,2	cyclictest	4018407	-21	kworker/u16:3+events_unbound	09:11:55	5
3893466	99	35	33,2	cyclictest	3903177	-21	kworker/u16:2+events_unbound	07:20:43	5
3893466	99	35	33,2	cyclictest	3903177	-21	kworker/u16:2+events_unbound	07:20:43	5
3893466	99	35	33,2	cyclictest	359276	-21	kworker/u16:2+events_unbound	12:10:13	5
3893466	99	35	33,2	cyclictest	271585	-21	kworker/u16:4+flush-8:0	11:50:02	5
3893466	99	35	33,2	cyclictest	271585	-21	kworker/u16:4+flush-8:0	11:35:10	5
3893466	99	35	33,2	cyclictest	247300	-21	kworker/u16:1+events_unbound	11:29:34	5
3893466	99	35	33,2	cyclictest	247300	-21	kworker/u16:1+events_unbound	11:22:06	5
3893466	99	35	33,2	cyclictest	135666	-21	kworker/u16:4+events_unbound	11:02:14	5
3893466	99	35	33,2	cyclictest	10369	-21	kworker/u16:2+flush-8:0	10:22:09	5
3893466	99	35	33,2	cyclictest	10369	-21	kworker/u16:2+events_unbound	10:27:19	5
3893466	99	35	33,2	cyclictest	10369	-21	kworker/u16:2+events_unbound	10:08:35	5
3893466	99	35	32,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	10:54:23	5
12805	2	35	0,0	chrt	12804	-21	diskstats	09:39:32	7
3893466	99	34	32,2	cyclictest	61395	-21	kworker/u16:5+events_unbound	10:12:59	5
3893466	99	34	32,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	11:15:43	5
3893466	99	34	32,2	cyclictest	4192812	-21	kworker/u16:0+events_unbound	10:46:46	5
3893466	99	34	32,2	cyclictest	4033820	-21	kworker/u16:4+flush-8:0	08:24:45	5
3893466	99	34	32,2	cyclictest	333339	-21	kworker/u16:1+events_unbound	12:27:46	5
3893466	99	34	32,2	cyclictest	333339	-21	kworker/u16:1+events_unbound	11:57:21	5
3893466	99	34	32,2	cyclictest	271585	-21	kworker/u16:4+events_unbound	11:26:38	5
116430	2	34	0,1	chrt	116431	-21	ssh	10:19:39	7
3893475	99	33	26,6	cyclictest	4033427	-21	latency_hist	08:19:20	7
3893475	99	33	0,31	cyclictest	185006	-21	latency_hist	10:49:19	7
3893466	99	32	30,2	cyclictest	3945620	-21	kworker/u16:1+events_unbound	08:09:19	5
3893466	99	32	30,2	cyclictest	10369	-21	kworker/u16:2+events_unbound	10:01:51	5
3893466	99	32	29,2	cyclictest	4018407	-21	kworker/u16:3+events_unbound	08:49:38	5
3892879	2	32	22,7	sleep6	0	-21	swapper/6	07:05:23	6
3893466	99	31	29,2	cyclictest	4033621	-21	kworker/u16:1+flush-8:0	09:35:22	5
157932	2	31	0,1	chrt	157931	-21	ssh	10:35:10	7
3893466	99	30	28,2	cyclictest	3975184	-21	kworker/u16:4+flush-8:0	07:49:43	5
3893466	99	29	27,2	cyclictest	4152949	-21	kworker/u16:0+events_unbound	09:15:30	5
3893466	99	29	27,2	cyclictest	4018407	-21	kworker/u16:3+events_unbound	08:19:46	5
3893466	99	29	26,2	cyclictest	3903175	-21	kworker/u16:0+flush-8:0	07:39:21	5
3893466	99	28	26,2	cyclictest	4101690	-21	kworker/u16:4+events_unbound	09:07:39	5
3893466	99	28	26,2	cyclictest	3903177	-21	kworker/u16:2+flush-8:0	07:54:46	5
74170	2	27	0,1	chrt	74171	-21	ssh	10:04:24	7
3893466	99	27	25,2	cyclictest	3873846	-21	kworker/u16:1+flush-8:0	07:14:49	5
3893475	99	26	21,4	cyclictest	370360	-21	latency_hist	12:04:19	7
3893466	99	26	23,2	cyclictest	3961367	-21	kworker/u16:3+flush-8:0	07:44:30	5
3893475	99	25	19,5	cyclictest	3984790	-21	latency_hist	07:54:19	7
3893466	99	24	22,2	cyclictest	3945620	-21	kworker/u16:1+events_unbound	07:59:48	5
3893466	99	24	22,2	cyclictest	3903177	-21	kworker/u16:2+events_unbound	08:11:30	5
4102972	2	23	0,0	chrt	0	-21	swapper/6	08:54:35	6
4102972	2	23	0,0	chrt	0	-21	swapper/6	08:54:35	6
3893472	99	22	19,2	cyclictest	97689	-21	kworker/u16:1+flush-8:0	10:39:30	6
3893472	99	22	19,2	cyclictest	61395	-21	kworker/u16:5+flush-8:0	10:04:50	6
3893466	99	22	17,2	cyclictest	4018407	-21	kworker/u16:3+flush-8:0	08:59:35	5
3893475	99	21	16,4	cyclictest	432129	-21	latency_hist	12:29:19	7
3893472	99	21	20,1	cyclictest	359276	-21	kworker/u16:2+events_unbound	12:36:42	6
3893472	99	21	19,2	cyclictest	3873846	-21	kworker/u16:1+flush-8:0	07:14:19	6
3893466	99	21	19,2	cyclictest	4018407	-21	kworker/u16:3+events_unbound	08:18:30	5
3893472	99	19	17,2	cyclictest	4033621	-21	kworker/u16:1+flush-8:0	08:49:50	6
3893475	99	18	0,17	cyclictest	0	-21	swapper/7	07:16:28	7
3893466	99	18	16,2	cyclictest	4018407	-21	kworker/u16:3+events_unbound	08:43:19	5
3893475	99	17	14,2	cyclictest	1278	-21	snmpd	07:25:20	7
3893466	99	17	15,2	cyclictest	4072076	-21	kworker/u16:2+events_unbound	08:36:46	5
3893466	99	17	15,2	cyclictest	4048206	-21	kworker/u16:0+flush-8:0	08:30:23	5
3893466	99	17	15,2	cyclictest	3845280	-21	kworker/u16:4+events_unbound	07:27:39	5
3893475	99	16	14,1	cyclictest	0	-21	swapper/7	11:19:45	7
3893475	99	16	11,4	cyclictest	135629	-21	latency_hist	10:29:19	7
3893475	99	16	10,5	cyclictest	3965342	-21	latency_hist	07:44:20	7
3893475	99	16	10,5	cyclictest	209739	-21	latency_hist	10:59:19	7
3893472	99	16	15,1	cyclictest	10369	-21	kworker/u16:2+events_unbound	10:19:38	6
3893466	99	16	14,2	cyclictest	3845280	-21	kworker/u16:4+events_unbound	07:13:19	5
3893475	99	15	13,1	cyclictest	432628	-21	/usr/sbin/munin	12:29:42	7
3893475	99	15	13,1	cyclictest	147127	-21	ssh	10:32:52	7
3893475	99	15	12,2	cyclictest	1278	-21	snmpd	12:08:04	7
3893475	99	15	12,2	cyclictest	0	-21	swapper/7	10:59:19	7
3893475	99	15	12,2	cyclictest	0	-21	swapper/7	07:29:45	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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