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 Sun Aug 02, 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
349635	2	103	0,1	sleep7	349634	-21	unixbench_multi	11:24:17	7
3954130	2	58	46,8	sleep4	0	-21	swapper/4	07:03:47	4
3963438	2	54	19,30	sleep7	0	-21	swapper/7	07:08:40	7
3963733	99	51	49,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	08:36:14	6
3963142	2	51	41,7	sleep5	0	-21	swapper/5	07:04:28	5
3963727	99	47	45,2	cyclictest	375618	-21	kworker/u16:0+flush-8:0	12:24:01	4
3963727	99	47	45,2	cyclictest	375618	-21	kworker/u16:0+flush-8:0	12:24:01	4
3963733	99	46	44,2	cyclictest	462556	-21	kworker/u16:3+events_unbound	12:14:12	6
3963733	99	43	41,2	cyclictest	462556	-21	kworker/u16:3+flush-8:0	12:29:01	6
3963727	99	43	40,2	cyclictest	252283	-21	kworker/u16:3+events_unbound	11:13:45	4
3963733	99	42	40,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:59:11	6
3963727	99	42	40,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:33:57	4
3963727	99	42	40,2	cyclictest	129468	-21	kworker/u16:3+events_unbound	10:23:45	4
3963727	99	42	40,2	cyclictest	129468	-21	kworker/u16:3+events_unbound	10:23:45	4
3963733	99	41	39,2	cyclictest	375618	-21	kworker/u16:0+flush-8:0	11:43:59	6
408165	2	40	0,0	sleep7	408167	-21	cut	11:49:09	7
3963727	99	40	38,2	cyclictest	462556	-21	kworker/u16:3+events_unbound	12:19:13	4
3963727	99	40	37,2	cyclictest	423433	-21	kworker/u16:2+events_unbound	11:58:59	4
3963727	99	39	37,2	cyclictest	352223	-21	kworker/u16:1+events_unbound	11:49:17	4
3963727	99	39	37,2	cyclictest	105690	-21	kworker/u16:1+events_unbound	10:16:06	4
3963733	99	38	36,2	cyclictest	352223	-21	kworker/u16:1+events_unbound	11:31:01	6
3963733	99	38	35,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	08:28:46	6
3963727	99	38	36,2	cyclictest	423433	-21	kworker/u16:2+events_unbound	12:13:29	4
3963727	99	38	36,2	cyclictest	352223	-21	kworker/u16:1+events_unbound	11:48:13	4
3963733	99	37	35,2	cyclictest	423433	-21	kworker/u16:2+events_unbound	11:54:49	6
3963727	99	37	35,2	cyclictest	510006	-21	kworker/u16:1+events_unbound	12:37:02	4
3963727	99	37	35,2	cyclictest	375618	-21	kworker/u16:0+events_unbound	12:05:01	4
3963733	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	11:06:41	6
3963733	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:26:41	6
3963733	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:26:41	6
3963733	99	36	34,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	12:06:29	6
3963733	99	36	34,2	cyclictest	105690	-21	kworker/u16:1+events_unbound	09:55:21	6
3963727	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:42:58	4
3963727	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:44:46	4
3963727	99	36	34,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:44:46	4
3963727	99	36	34,2	cyclictest	510006	-21	kworker/u16:1+events_unbound	12:32:42	4
3963727	99	36	34,2	cyclictest	105690	-21	kworker/u16:1+events_unbound	10:34:12	4
3963733	99	35	33,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:41:30	6
3963733	99	35	33,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:36:31	6
3963727	99	35	33,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:05:15	4
3963727	99	35	33,2	cyclictest	4191695	-21	kworker/u16:0+events_unbound	09:20:22	4
3963727	99	35	33,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:33:25	4
3963727	99	35	33,2	cyclictest	105690	-21	kworker/u16:1+events_unbound	10:31:42	4
3963727	99	35	32,3	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:25:03	4
3963738	99	34	33,0	cyclictest	0	-21	swapper/7	07:33:59	7
3963733	99	34	32,2	cyclictest	4191695	-21	kworker/u16:0+events_unbound	09:22:15	6
3963733	99	34	32,2	cyclictest	3997171	-21	kworker/u16:0+events_unbound	07:53:46	6
3963733	99	34	32,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:27:06	6
3963727	99	34	32,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	11:07:06	4
3963727	99	34	32,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:58:13	4
3963727	99	34	32,2	cyclictest	462083	-21	kworker/u16:1+flush-8:0	12:18:13	4
3963727	99	34	32,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	09:38:21	4
3963727	99	34	32,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	09:30:26	4
3963733	99	33	31,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:07:01	6
3963733	99	33	31,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:44:42	6
3963733	99	33	31,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:44:42	6
3963733	99	33	31,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:42:09	6
3963727	99	33	31,2	cyclictest	4191695	-21	kworker/u16:0+flush-8:0	09:49:17	4
3963727	99	33	31,2	cyclictest	339515	-21	kworker/u16:0+events_unbound	11:25:01	4
3963727	99	33	31,2	cyclictest	252283	-21	kworker/u16:3+events_unbound	11:09:50	4
3963727	99	33	31,2	cyclictest	229461	-21	kworker/u16:4+flush-8:0	10:51:33	4
3963727	99	33	31,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:21:10	4
3963727	99	33	31,2	cyclictest	129468	-21	kworker/u16:3+events_unbound	10:21:01	4
389356	2	33	0,1	chrt	389357	-21	sh	11:43:48	7
3963738	99	32	26,5	cyclictest	648	-21	systemd-journal	11:33:44	7
3963733	99	32	30,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:56:23	6
3963733	99	32	30,2	cyclictest	4016393	-21	kworker/u16:1+events_unbound	07:43:46	6
3963733	99	32	30,2	cyclictest	229461	-21	kworker/u16:4+flush-8:0	10:40:05	6
3963729	99	32	30,2	cyclictest	462556	-21	kworker/u16:3+flush-8:0	12:14:12	5
3963733	99	31	29,2	cyclictest	423433	-21	kworker/u16:2+events_unbound	12:13:15	6
3963733	99	31	29,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	12:20:49	6
3963733	99	31	29,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:51:38	6
3963733	99	31	29,2	cyclictest	129468	-21	kworker/u16:3+events_unbound	10:20:10	6
3963727	99	31	29,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	09:10:18	4
3963727	99	31	29,2	cyclictest	4065406	-21	kworker/u16:1+flush-8:0	08:44:54	4
3963727	99	31	29,2	cyclictest	252283	-21	kworker/u16:3+events_unbound	10:45:58	4
3963727	99	31	29,2	cyclictest	105690	-21	kworker/u16:1+flush-8:0	10:10:13	4
3963727	99	31	29,2	cyclictest	105690	-21	kworker/u16:1+events_unbound	09:59:37	4
3963727	99	31	28,2	cyclictest	8760	-21	kworker/u16:2+events_unbound	10:56:10	4
3963738	99	30	24,5	cyclictest	3987034	-21	latency_hist	07:18:45	7
3963733	99	30	28,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	09:33:30	6
3963733	99	30	28,2	cyclictest	177828	-21	kworker/u16:0+events_unbound	10:36:19	6
3963733	99	30	28,2	cyclictest	129468	-21	kworker/u16:3+flush-8:0	10:13:18	6
3963729	99	30	28,2	cyclictest	3973380	-21	kworker/u16:4+flush-8:0	08:09:10	5
3963322	2	30	20,7	sleep6	0	-21	swapper/6	07:07:02	6
3963733	99	29	27,2	cyclictest	4065406	-21	kworker/u16:1+events_unbound	08:06:22	6
3963733	99	29	27,2	cyclictest	3973380	-21	kworker/u16:4+flush-8:0	08:15:22	6
3963729	99	29	27,2	cyclictest	4191695	-21	kworker/u16:0+events_unbound	09:45:29	5
3963729	99	29	27,2	cyclictest	4191695	-21	kworker/u16:0+events_unbound	09:45:29	5
3963729	99	29	27,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	12:19:15	5
3963727	99	29	27,2	cyclictest	4074974	-21	kworker/u16:3+flush-8:0	08:37:54	4
3963727	99	29	27,2	cyclictest	352223	-21	kworker/u16:1+flush-8:0	11:54:21	4
3963727	99	29	27,2	cyclictest	229461	-21	kworker/u16:4+flush-8:0	11:41:01	4
202974	2	29	0,1	chrt	202972	-21	sh	10:25:18	7
202974	2	29	0,1	chrt	202972	-21	sh	10:25:18	7
3963733	99	28	26,2	cyclictest	4065406	-21	kworker/u16:1+events_unbound	09:01:42	6
3963733	99	28	26,2	cyclictest	229461	-21	kworker/u16:4+events_unbound	11:35:30	6
3963727	99	28	26,2	cyclictest	4104133	-21	kworker/u16:2+events_unbound	08:41:54	4
3963727	99	28	26,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	09:42:27	4
3963727	99	28	26,2	cyclictest	4074974	-21	kworker/u16:3+events_unbound	08:49:53	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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