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 Thu Feb 05, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
118631	2	59	48,8	sleep5	0	-21	swapper/5	19:02:24	5
118854	2	57	47,7	sleep4	0	-21	swapper/4	19:05:35	4
118754	2	52	42,7	sleep6	0	-21	swapper/6	19:04:09	6
119206	99	50	47,2	cyclictest	113096	-21	kworker/u16:2+flush-8:0	20:01:20	5
119204	99	48	46,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:16:45	4
119204	99	48	46,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	23:12:46	4
119209	99	44	42,2	cyclictest	141253	-21	kworker/u16:3+events_unbound	19:21:45	6
119204	99	43	40,2	cyclictest	597346	-21	kworker/u16:3+events_unbound	23:01:22	4
119204	99	42	40,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	00:31:49	4
119204	99	42	40,2	cyclictest	597346	-21	kworker/u16:3+events_unbound	22:57:55	4
118633	2	42	8,30	sleep7	0	-21	swapper/7	19:02:26	7
119214	99	41	36,4	cyclictest	650	-21	systemd-journal	23:46:14	7
119206	99	40	38,2	cyclictest	716632	-21	kworker/u16:0+events_unbound	00:16:11	5
119209	99	39	37,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:04:01	6
119204	99	39	37,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:53:02	4
119206	99	38	36,2	cyclictest	594889	-21	kworker/u16:1+flush-8:0	22:46:14	5
119206	99	38	36,2	cyclictest	594889	-21	kworker/u16:1+flush-8:0	22:46:14	5
119204	99	38	36,2	cyclictest	826061	-21	kworker/u16:3+events_unbound	00:22:46	4
119204	99	38	36,2	cyclictest	765514	-21	kworker/u16:1+events_unbound	00:20:18	4
119204	99	38	36,2	cyclictest	716632	-21	kworker/u16:0+events_unbound	23:52:29	4
119204	99	38	36,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:39:15	4
119204	99	38	36,2	cyclictest	402883	-21	kworker/u16:5+events_unbound	21:48:03	4
119209	99	37	35,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:32:13	6
119206	99	37	35,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:31:22	5
119204	99	37	35,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:33:14	4
119204	99	37	35,2	cyclictest	582652	-21	kworker/u16:2+events_unbound	22:50:14	4
119204	99	36	34,2	cyclictest	716632	-21	kworker/u16:0+events_unbound	23:51:14	4
119204	99	36	34,2	cyclictest	691254	-21	kworker/u16:3+flush-8:0	23:22:11	4
119204	99	36	34,2	cyclictest	691254	-21	kworker/u16:3+flush-8:0	23:22:11	4
119204	99	36	34,2	cyclictest	691254	-21	kworker/u16:3+events_unbound	00:02:42	4
119204	99	36	34,2	cyclictest	691254	-21	kworker/u16:3+events_unbound	00:02:42	4
119204	99	36	34,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:08:46	4
119204	99	36	34,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:22:23	4
119204	99	36	34,2	cyclictest	509817	-21	kworker/u16:1+events_unbound	22:12:27	4
119204	99	36	34,2	cyclictest	402883	-21	kworker/u16:5+events_unbound	21:43:59	4
119204	99	36	34,2	cyclictest	354557	-21	kworker/u16:3+events_unbound	21:15:07	4
119209	99	35	33,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:28:13	6
119206	99	35	34,1	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:39:43	5
119204	99	35	33,2	cyclictest	765514	-21	kworker/u16:1+events_unbound	00:09:54	4
119204	99	35	33,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	00:00:14	4
119204	99	35	33,2	cyclictest	402883	-21	kworker/u16:5+events_unbound	21:32:56	4
119204	99	35	33,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:19:27	4
119209	99	34	32,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:28:13	6
119209	99	34	32,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:53:45	6
119204	99	34	32,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:45:03	4
119204	99	34	32,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	00:30:31	4
119204	99	34	32,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:32:31	4
119204	99	34	32,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	22:02:27	4
119204	99	34	32,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:09:31	4
119204	99	34	32,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:29:59	4
119204	99	34	31,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:21:23	4
119209	99	33	31,2	cyclictest	691254	-21	kworker/u16:3+events_unbound	23:22:56	6
119209	99	33	31,2	cyclictest	691254	-21	kworker/u16:3+events_unbound	23:22:56	6
119209	99	33	31,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:26:16	6
119209	99	33	31,2	cyclictest	390649	-21	kworker/u16:1+events_unbound	21:23:32	6
119209	99	33	31,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:38:52	6
119209	99	33	31,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	22:00:53	6
119209	99	33	30,2	cyclictest	691254	-21	kworker/u16:3+flush-8:0	23:36:15	6
119204	99	33	31,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:40:18	4
119204	99	33	31,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:30:35	4
119204	99	33	31,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:57:10	4
119204	99	33	31,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:53:47	4
119204	99	33	31,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:38:46	4
119209	99	32	30,2	cyclictest	691254	-21	kworker/u16:3+events_unbound	23:48:56	6
119209	99	32	30,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	23:18:44	6
119209	99	32	30,2	cyclictest	476031	-21	kworker/u16:4+flush-8:0	22:48:37	6
119209	99	32	30,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:53:45	6
119209	99	32	30,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:10:32	6
119206	99	32	30,2	cyclictest	476031	-21	kworker/u16:4+flush-8:0	22:31:54	5
119206	99	32	30,2	cyclictest	335246	-21	kworker/u16:2+events_unbound	21:28:23	5
119204	99	32	30,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:42:39	4
119204	99	32	30,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:42:39	4
119204	99	32	30,2	cyclictest	509817	-21	kworker/u16:1+events_unbound	22:27:26	4
119204	99	32	30,2	cyclictest	228890	-21	kworker/u16:0+flush-8:0	22:07:03	4
119209	99	31	29,2	cyclictest	716632	-21	kworker/u16:0+events_unbound	23:40:04	6
119209	99	31	29,2	cyclictest	509817	-21	kworker/u16:1+events_unbound	22:12:33	6
119209	99	31	29,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:45:29	6
119209	99	31	29,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:45:29	6
119209	99	31	29,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	21:20:32	6
119209	99	31	29,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	20:32:55	6
119206	99	31	29,2	cyclictest	765514	-21	kworker/u16:1+events_unbound	23:57:26	5
119206	99	31	29,2	cyclictest	643406	-21	kworker/u16:1+events_unbound	23:29:23	5
119206	99	31	29,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:30:55	5
119206	99	31	29,2	cyclictest	113096	-21	kworker/u16:2+flush-8:0	19:46:15	5
119206	99	31	28,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:16:23	5
119209	99	30	28,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:59:44	6
119209	99	30	28,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:13:41	6
119209	99	30	28,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	00:17:33	6
119209	99	30	28,2	cyclictest	523046	-21	kworker/u16:0+events_unbound	22:40:08	6
119209	99	30	28,2	cyclictest	476031	-21	kworker/u16:4+events_unbound	22:17:32	6
119209	99	30	28,2	cyclictest	113096	-21	kworker/u16:2+events_unbound	20:10:30	6
119209	99	30	28,2	cyclictest	113096	-21	kworker/u16:2+events_unbound	19:07:58	6
119209	99	30	28,2	cyclictest	113096	-21	kworker/u16:2+events_unbound	19:07:58	6
119209	99	30	27,2	cyclictest	228890	-21	kworker/u16:0+events_unbound	22:01:28	6
119209	99	30	27,2	cyclictest	113096	-21	kworker/u16:2+flush-8:0	19:51:30	6
119206	99	30	28,2	cyclictest	453057	-21	kworker/u16:1+flush-8:0	21:57:22	5
119204	99	30	28,2	cyclictest	716632	-21	kworker/u16:0+events_unbound	00:16:19	4
119209	99	29	27,2	cyclictest	826061	-21	kworker/u16:3+events_unbound	00:24:24	6
119209	99	29	27,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:54:36	6
119209	99	29	27,2	cyclictest	656454	-21	kworker/u16:2+events_unbound	23:27:04	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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