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 Jul 23, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1194239	2	97	0,1	sleep7	1194240	-21	sh	00:27:04	7
928215	2	75	0,1	sleep7	928214	-21	ssh	22:25:55	7
497114	2	63	36,8	sleep4	0	-21	swapper/4	19:09:22	4
496841	2	54	19,30	sleep7	0	-21	swapper/7	19:05:32	7
496981	2	46	36,7	sleep5	0	-21	swapper/5	19:07:30	5
497394	99	44	42,2	cyclictest	893951	-21	kworker/u16:0+events_unbound	22:59:25	6
497391	99	39	35,3	cyclictest	807900	-21	latency_hist	21:39:24	5
497394	99	38	36,2	cyclictest	1058282	-21	kworker/u16:0+flush-8:0	00:19:39	6
497387	99	37	35,2	cyclictest	1205379	-21	kworker/u16:0+flush-8:0	00:34:23	4
497394	99	36	33,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	21:19:38	6
497397	99	35	33,1	cyclictest	0	-21	swapper/7	22:16:51	7
497387	99	35	33,2	cyclictest	756680	-21	kworker/u16:2+flush-8:0	21:39:59	4
497387	99	35	32,3	cyclictest	959718	-21	kworker/u16:2+flush-8:0	00:34:30	4
496858	2	35	25,7	sleep6	0	-21	swapper/6	19:05:47	6
497387	99	34	32,2	cyclictest	973245	-21	kworker/u16:4+events_unbound	23:09:18	4
497387	99	32	30,2	cyclictest	893951	-21	kworker/u16:0+flush-8:0	22:19:59	4
497387	99	32	30,2	cyclictest	795965	-21	kworker/u16:1+events_unbound	21:56:34	4
497387	99	32	29,2	cyclictest	936307	-21	kworker/u16:1+flush-8:0	23:19:34	4
497397	99	31	30,0	cyclictest	0	-21	swapper/7	23:57:34	7
497397	99	31	30,0	cyclictest	0	-21	swapper/7	21:12:35	7
497397	99	31	28,2	cyclictest	734580	-21	diskmemload	22:48:35	7
497387	99	31	29,2	cyclictest	959718	-21	kworker/u16:2+events_unbound	23:39:47	4
497387	99	31	29,2	cyclictest	959718	-21	kworker/u16:2+events_unbound	22:49:35	4
497387	99	31	29,2	cyclictest	1058282	-21	kworker/u16:0+events_unbound	23:59:45	4
497387	99	31	29,2	cyclictest	1058282	-21	kworker/u16:0+events_unbound	23:54:30	4
497387	99	31	28,2	cyclictest	1095339	-21	kworker/u16:1+events_unbound	00:14:26	4
497387	99	31	28,2	cyclictest	1058282	-21	kworker/u16:0+flush-8:0	23:34:46	4
497394	99	30	28,2	cyclictest	936307	-21	kworker/u16:1+events_unbound	23:19:47	6
497394	99	29	27,2	cyclictest	893952	-21	kworker/u16:3+flush-8:0	22:14:49	6
497387	99	29	27,2	cyclictest	795965	-21	kworker/u16:1+flush-8:0	21:49:34	4
497387	99	29	27,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	19:59:42	4
497397	99	28	27,0	cyclictest	0	-21	swapper/7	21:53:34	7
497397	99	28	26,1	cyclictest	983038	-21	ssh	22:55:45	7
497397	99	28	26,1	cyclictest	0	-21	swapper/7	23:39:34	7
497397	99	28	25,1	cyclictest	794281	-21	ssh	21:31:48	7
497394	99	28	26,2	cyclictest	856991	-21	kworker/u16:5+flush-8:0	22:04:19	6
497394	99	28	26,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	21:04:58	6
497394	99	28	26,2	cyclictest	1095339	-21	kworker/u16:1+flush-8:0	00:24:46	6
497387	99	28	26,2	cyclictest	936307	-21	kworker/u16:1+flush-8:0	23:18:53	4
497387	99	28	26,2	cyclictest	844788	-21	kworker/u16:0+events_unbound	22:04:34	4
497387	99	28	26,2	cyclictest	676581	-21	kworker/u16:4+flush-8:0	21:16:11	4
497397	99	27	26,0	cyclictest	0	-21	swapper/7	23:53:35	7
497394	99	27	25,2	cyclictest	973245	-21	kworker/u16:4+events_unbound	23:54:38	6
497394	99	27	25,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	19:29:46	6
497387	99	27	25,2	cyclictest	1095339	-21	kworker/u16:1+flush-8:0	00:23:34	4
497387	99	27	25,2	cyclictest	1058282	-21	kworker/u16:0+events_unbound	23:46:35	4
497397	99	26	25,0	cyclictest	0	-21	swapper/7	23:26:34	7
497397	99	26	25,0	cyclictest	0	-21	swapper/7	23:11:02	7
497397	99	26	25,0	cyclictest	0	-21	swapper/7	23:11:02	7
497397	99	26	25,0	cyclictest	0	-21	swapper/7	23:01:34	7
497397	99	26	25,0	cyclictest	0	-21	swapper/7	21:16:26	7
497387	99	26	24,2	cyclictest	893951	-21	kworker/u16:0+events_unbound	22:45:35	4
497387	99	26	24,2	cyclictest	795965	-21	kworker/u16:1+events_unbound	21:44:58	4
497387	99	26	24,2	cyclictest	756680	-21	kworker/u16:2+events_unbound	21:29:34	4
497397	99	25	24,0	cyclictest	0	-21	swapper/7	22:50:34	7
497397	99	25	24,0	cyclictest	0	-21	swapper/7	22:41:33	7
497397	99	25	24,0	cyclictest	0	-21	swapper/7	19:09:39	7
497397	99	25	23,1	cyclictest	783390	-21	ssh	21:29:14	7
497397	99	25	22,1	cyclictest	880568	-21	sh	22:08:06	7
497394	99	25	23,2	cyclictest	973245	-21	kworker/u16:4+events_unbound	23:29:57	6
497394	99	25	23,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	21:24:50	6
497387	99	25	23,2	cyclictest	893951	-21	kworker/u16:0+events_unbound	22:55:35	4
497387	99	25	23,2	cyclictest	735904	-21	kworker/u16:1+events_unbound	21:12:18	4
497387	99	25	22,2	cyclictest	626722	-21	kworker/u16:1+flush-8:0	20:34:40	4
497387	99	25	22,2	cyclictest	626722	-21	kworker/u16:1+events_unbound	20:54:37	4
497394	99	24	22,2	cyclictest	959718	-21	kworker/u16:2+events_unbound	23:24:44	6
497394	99	24	22,2	cyclictest	893952	-21	kworker/u16:3+events_unbound	22:36:53	6
497394	99	24	22,2	cyclictest	676581	-21	kworker/u16:4+flush-8:0	20:44:47	6
497394	99	24	22,2	cyclictest	676581	-21	kworker/u16:4+events_unbound	21:16:30	6
497387	99	24	22,2	cyclictest	985197	-21	kworker/u16:5+events_unbound	23:03:30	4
497387	99	24	22,2	cyclictest	959718	-21	kworker/u16:2+events_unbound	00:27:22	4
497387	99	24	22,2	cyclictest	856991	-21	kworker/u16:5+flush-8:0	22:01:35	4
497387	99	24	22,2	cyclictest	795965	-21	kworker/u16:1+events_unbound	22:09:59	4
497387	99	24	22,2	cyclictest	1095339	-21	kworker/u16:1+flush-8:0	00:07:42	4
497387	99	24	21,2	cyclictest	477665	-21	kworker/u16:2+events_unbound	19:19:26	4
497397	99	23	22,0	cyclictest	0	-21	swapper/7	00:02:54	7
497397	99	23	0,21	cyclictest	916419	-21	ssh	22:21:42	7
497394	99	23	21,2	cyclictest	676581	-21	kworker/u16:4+events_unbound	22:05:35	6
497394	99	23	19,3	cyclictest	372951	-21	kworker/u16:4+flush-8:0	20:04:46	6
497387	99	23	21,2	cyclictest	959718	-21	kworker/u16:2+flush-8:0	23:33:34	4
497387	99	23	21,2	cyclictest	936307	-21	kworker/u16:1+events_unbound	23:26:59	4
497397	99	22	21,0	cyclictest	0	-21	swapper/7	19:54:35	7
497397	99	22	21,0	cyclictest	0	-21	swapper/7	00:34:42	7
497397	99	22	20,1	cyclictest	1182194	-21	ssh	00:22:15	7
497394	99	22	21,1	cyclictest	676581	-21	kworker/u16:4+events_unbound	21:46:53	6
497387	99	22	20,2	cyclictest	973245	-21	kworker/u16:4+events_unbound	23:51:34	4
497387	99	22	20,2	cyclictest	930246	-21	kworker/u16:4+flush-8:0	22:36:34	4
497387	99	22	20,2	cyclictest	759278	-21	kworker/u16:3+events_unbound	21:26:59	4
497387	99	22	20,2	cyclictest	433182	-21	kworker/u16:0+flush-8:0	21:35:18	4
497387	99	22	20,2	cyclictest	433182	-21	kworker/u16:0+events_unbound	21:19:43	4
497387	99	22	20,2	cyclictest	1095339	-21	kworker/u16:1+events_unbound	00:13:55	4
497397	99	21	20,0	cyclictest	0	-21	swapper/7	00:11:46	7
497397	99	21	19,1	cyclictest	930880	-21	ssh	22:30:09	7
497397	99	21	19,1	cyclictest	734580	-21	diskmemload	23:37:01	7
497397	99	21	19,1	cyclictest	0	-21	swapper/7	19:29:48	7
497397	99	21	18,2	cyclictest	1302	-21	snmpd	22:09:44	7
497394	99	21	19,2	cyclictest	676581	-21	kworker/u16:4+events_unbound	21:12:30	6
497394	99	21	19,2	cyclictest	653249	-21	kworker/u16:2+flush-8:0	20:29:40	6
497394	99	21	19,2	cyclictest	653249	-21	kworker/u16:2+flush-8:0	20:29:40	6
497394	99	21	19,2	cyclictest	1058282	-21	kworker/u16:0+flush-8:0	23:47:34	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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