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 Apr 19, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3015839	2	47	35,7	sleep5	0	-21	swapper/5	19:05:05	5
3022442	99	42	39,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	00:04:45	4
3021988	2	40	29,8	sleep4	0	-21	swapper/4	19:07:21	4
3013585	2	40	3,31	sleep7	0	-21	swapper/7	19:04:59	7
3022449	99	39	0,37	cyclictest	3689023	-21	ssh	00:06:42	7
3022442	99	37	35,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	22:01:57	4
3022449	99	36	35,0	cyclictest	0	-21	swapper/7	22:19:46	7
3022449	99	36	33,2	cyclictest	3676354	-21	ssh	00:00:41	7
3022442	99	36	34,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:49:38	4
3022442	99	36	34,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:22:01	4
3022442	99	36	34,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:39:42	4
3022442	99	36	34,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:39:42	4
3022442	99	36	34,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:28:34	4
3022442	99	36	33,2	cyclictest	3485501	-21	kworker/u16:3+events_unbound	23:04:45	4
3022449	99	35	34,0	cyclictest	0	-21	swapper/7	23:13:21	7
3022449	99	35	34,0	cyclictest	0	-21	swapper/7	22:44:45	7
3022449	99	35	30,4	cyclictest	3738889	-21	latency_hist	00:29:43	7
3022442	99	35	33,2	cyclictest	3750873	-21	kworker/u16:3+events_unbound	00:36:09	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:32:18	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:17:58	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:10:58	4
3022442	99	35	33,2	cyclictest	3667746	-21	kworker/u16:3+events_unbound	00:02:01	4
3022442	99	35	33,2	cyclictest	3546098	-21	kworker/u16:1+events_unbound	23:32:34	4
3022442	99	35	33,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:58:40	4
3022442	99	35	33,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:58:40	4
3022442	99	35	33,2	cyclictest	3413082	-21	kworker/u16:4+flush-8:0	22:55:21	4
3022442	99	35	33,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:42:46	4
3022442	99	35	33,2	cyclictest	3292248	-21	kworker/u16:0+events_unbound	21:59:41	4
3022442	99	35	33,2	cyclictest	3292248	-21	kworker/u16:0+events_unbound	21:51:40	4
3022442	99	35	33,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:47:18	4
3022449	99	34	29,3	cyclictest	3602946	-21	ntpq	23:30:08	7
3022442	99	34	33,1	cyclictest	3268252	-21	kworker/u16:4+events_unbound	21:19:33	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:41:53	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:17:37	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:17:37	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:01:49	4
3022442	99	34	32,2	cyclictest	3497468	-21	kworker/u16:5+events_unbound	22:53:41	4
3022442	99	34	32,2	cyclictest	3268252	-21	kworker/u16:4+events_unbound	21:21:42	4
3022442	99	34	32,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	22:15:52	4
3022442	99	34	32,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	21:40:49	4
3022442	99	34	32,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	21:11:48	4
3022442	99	34	32,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	21:11:48	4
3022449	99	33	28,4	cyclictest	635	-21	systemd-journal	20:59:44	7
3022442	99	33	31,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:13:45	4
3022442	99	33	31,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:33:06	4
3022449	99	32	31,0	cyclictest	0	-21	swapper/7	23:17:41	7
3022449	99	32	31,0	cyclictest	0	-21	swapper/7	23:17:41	7
3022442	99	32	30,2	cyclictest	3732386	-21	kworker/u16:2+events_unbound	00:27:25	4
3022442	99	32	30,2	cyclictest	3413082	-21	kworker/u16:4+events_unbound	23:54:41	4
3022442	99	32	30,2	cyclictest	3398508	-21	kworker/u16:3+events_unbound	22:11:40	4
3022449	99	31	30,0	cyclictest	0	-21	swapper/7	23:03:41	7
3022449	99	31	30,0	cyclictest	0	-21	swapper/7	21:13:45	7
3022449	99	31	30,0	cyclictest	0	-21	swapper/7	21:13:45	7
3022449	99	31	29,1	cyclictest	3715281	-21	ssh	00:19:48	7
3022449	99	31	29,1	cyclictest	3664834	-21	ssh	23:56:42	7
3022449	99	31	29,1	cyclictest	3664834	-21	ssh	23:56:42	7
3022442	99	31	29,2	cyclictest	3413082	-21	kworker/u16:4+events_unbound	23:36:38	4
3022442	99	31	29,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:23:49	4
3022442	99	31	29,2	cyclictest	3265022	-21	kworker/u16:2+flush-8:0	22:25:25	4
3022442	99	31	29,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	22:48:40	4
3022442	99	31	29,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	21:37:57	4
3022449	99	30	28,1	cyclictest	3375822	-21	ssh	21:57:57	7
3022449	99	30	27,2	cyclictest	3485376	-21	munin-run	22:44:43	7
3022442	99	30	28,2	cyclictest	3546098	-21	kworker/u16:1+events_unbound	23:26:25	4
3022442	99	30	28,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:34:24	4
3022442	99	30	28,2	cyclictest	3398508	-21	kworker/u16:3+events_unbound	22:08:26	4
3022449	99	29	28,0	cyclictest	0	-21	swapper/7	23:50:54	7
3022449	99	29	27,1	cyclictest	0	-21	swapper/7	21:47:14	7
3022449	99	29	25,3	cyclictest	3314977	-21	rm	21:32:09	7
3022449	99	28	27,0	cyclictest	0	-21	swapper/7	21:51:34	7
3022449	99	28	27,0	cyclictest	0	-21	swapper/7	00:17:53	7
3022449	99	28	25,2	cyclictest	3617005	-21	ssh	23:37:45	7
3022449	99	27	26,0	cyclictest	0	-21	swapper/7	21:59:53	7
3022442	99	27	25,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:20:13	4
3022442	99	27	25,2	cyclictest	3159223	-21	kworker/u16:2+events_unbound	20:47:34	4
3022442	99	27	25,2	cyclictest	3031928	-21	kworker/u16:1+events_unbound	20:00:45	4
3022449	99	26	24,1	cyclictest	3327920	-21	ssh	21:38:42	7
3022442	99	26	24,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	20:32:54	4
3022058	2	26	15,8	sleep6	0	-21	swapper/6	19:08:19	6
3022449	99	25	24,0	cyclictest	0	-21	swapper/7	23:25:57	7
3022449	99	25	24,0	cyclictest	0	-21	swapper/7	23:06:29	7
3022449	99	25	24,0	cyclictest	0	-21	swapper/7	22:51:40	7
3022449	99	25	23,1	cyclictest	3425028	-21	ssh	22:19:38	7
3022449	99	25	23,1	cyclictest	0	-21	swapper/7	19:35:06	7
3022442	99	25	23,2	cyclictest	3074068	-21	kworker/u16:3+events_unbound	19:42:53	4
3022442	99	25	23,2	cyclictest	3074068	-21	kworker/u16:3+events_unbound	19:42:53	4
3022442	99	25	23,2	cyclictest	3031928	-21	kworker/u16:1+events_unbound	20:13:53	4
3022442	99	25	23,2	cyclictest	3030632	-21	kworker/u16:0+events_unbound	19:28:54	4
3022449	99	24	23,0	cyclictest	0	-21	swapper/7	22:30:41	7
3022449	99	24	23,0	cyclictest	0	-21	swapper/7	22:05:52	7
3022449	99	24	23,0	cyclictest	0	-21	swapper/7	21:15:13	7
3022444	99	24	22,2	cyclictest	3398508	-21	kworker/u16:3+events_unbound	22:07:45	6
3022442	99	24	22,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	21:06:25	4
3022442	99	24	22,2	cyclictest	3074068	-21	kworker/u16:3+events_unbound	19:38:54	4
3022442	99	24	22,2	cyclictest	3030632	-21	kworker/u16:0+events_unbound	19:31:54	4
3022449	99	23	22,0	cyclictest	0	-21	swapper/7	22:57:37	7
3022449	99	23	21,1	cyclictest	3761928	-21	ssh	00:37:41	7
3022449	99	23	0,21	cyclictest	3055256	-21	sshd-session	19:24:46	7
3022442	99	23	21,2	cyclictest	3159223	-21	kworker/u16:2+events_unbound	20:25:54	4
3022442	99	23	21,2	cyclictest	3159223	-21	kworker/u16:2+events_unbound	20:16:53	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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