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 Feb 14, 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
3721608	2	55	45,7	sleep6	0	-21	swapper/6	19:05:32	6
3721920	99	52	51,0	cyclictest	0	-21	swapper/7	22:05:34	7
3721588	2	50	40,7	sleep4	0	-21	swapper/4	19:05:14	4
3721920	99	49	44,4	cyclictest	3859315	-21	latency_hist	20:15:44	7
3721912	99	46	44,2	cyclictest	4182552	-21	kworker/u16:2+events_unbound	23:26:11	6
3721324	2	43	33,7	sleep5	0	-21	swapper/5	19:01:30	5
3721904	99	41	39,2	cyclictest	4135968	-21	kworker/u16:5+events_unbound	22:29:14	4
3721904	99	41	39,2	cyclictest	4074094	-21	kworker/u16:5+events_unbound	22:07:02	4
3720674	2	40	3,31	sleep7	0	-21	swapper/7	19:01:16	7
3721912	99	39	37,2	cyclictest	96221	-21	kworker/u16:1+events_unbound	23:49:30	6
3721912	99	39	37,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:21:51	6
3721912	99	39	37,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:12:03	6
3721912	99	39	37,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:41:51	6
3721912	99	39	37,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:44:54	6
3721912	99	39	37,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:00:15	6
3721904	99	39	37,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	00:11:45	4
3721920	99	38	0,36	cyclictest	3773283	-21	latency_hist	19:30:44	7
3721912	99	38	36,2	cyclictest	4135968	-21	kworker/u16:5+events_unbound	22:42:47	6
3721912	99	38	36,2	cyclictest	4099385	-21	kworker/u16:1+events_unbound	22:31:43	6
3721912	99	38	36,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	22:10:19	6
3721912	99	38	36,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	22:04:31	6
3721912	99	38	36,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	21:34:14	6
3721912	99	38	36,2	cyclictest	262963	-21	kworker/u16:3+events_unbound	00:32:39	6
3721912	99	38	36,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:23:26	6
3721912	99	38	36,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:13:30	6
3721912	99	38	35,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:10:46	6
3721920	99	37	36,0	cyclictest	0	-21	swapper/7	22:42:38	7
3721912	99	37	35,2	cyclictest	96221	-21	kworker/u16:1+events_unbound	00:00:26	6
3721912	99	37	35,2	cyclictest	4062829	-21	kworker/u16:3+events_unbound	21:54:51	6
3721912	99	37	35,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	21:48:00	6
3721912	99	37	35,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:29:54	6
3721912	99	37	35,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:18:59	6
3721904	99	37	35,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:02:59	4
3721920	99	36	34,1	cyclictest	48200	-21	ssh	23:01:39	7
3721912	99	36	34,2	cyclictest	4135968	-21	kworker/u16:5+events_unbound	22:48:59	6
3721912	99	36	34,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:19:59	6
3721912	99	36	34,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:37:58	6
3721912	99	36	34,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:23:46	6
3721912	99	36	34,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	00:30:26	6
3721912	99	36	34,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:08:27	6
3721904	99	36	34,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:32:14	4
3721920	99	35	33,1	cyclictest	0	-21	swapper/7	22:24:02	7
3721912	99	35	33,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:28:18	6
3721912	99	35	33,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	21:59:07	6
3721912	99	35	33,2	cyclictest	3936120	-21	kworker/u16:1+events_unbound	21:06:19	6
3721912	99	35	33,2	cyclictest	3791366	-21	kworker/u16:2+events_unbound	21:18:55	6
3721904	99	35	33,2	cyclictest	4182552	-21	kworker/u16:2+events_unbound	23:26:26	4
3721904	99	35	33,2	cyclictest	4099385	-21	kworker/u16:1+events_unbound	22:24:41	4
3721904	99	35	33,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:20:25	4
3721904	99	35	33,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:18:58	4
3721920	99	34	33,0	cyclictest	0	-21	swapper/7	00:15:31	7
3721912	99	34	32,2	cyclictest	98607	-21	kworker/u16:3+events_unbound	23:52:02	6
3721912	99	34	32,2	cyclictest	98607	-21	kworker/u16:3+events_unbound	23:32:43	6
3721912	99	34	32,2	cyclictest	96221	-21	kworker/u16:1+events_unbound	00:03:46	6
3721912	99	34	32,2	cyclictest	4182552	-21	kworker/u16:2+events_unbound	23:02:59	6
3721912	99	34	32,2	cyclictest	4182552	-21	kworker/u16:2+events_unbound	22:55:06	6
3721912	99	34	32,2	cyclictest	3731357	-21	kworker/u16:1+flush-8:0	19:15:44	6
3721904	99	34	32,2	cyclictest	4182552	-21	kworker/u16:2+events_unbound	22:54:11	4
3721904	99	34	32,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:39:50	4
3721904	99	34	32,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:31:31	4
3721904	99	34	32,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:22:50	4
3721904	99	34	32,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:12:34	4
3721904	99	34	32,2	cyclictest	3936120	-21	kworker/u16:1+flush-8:0	21:26:09	4
3721904	99	34	32,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:21:17	4
3721904	99	34	32,2	cyclictest	262963	-21	kworker/u16:3+events_unbound	00:32:06	4
3721904	99	34	32,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:22:02	4
3721920	99	33	32,0	cyclictest	0	-21	swapper/7	22:29:07	7
3721920	99	33	32,0	cyclictest	0	-21	swapper/7	21:57:19	7
3721920	99	33	31,1	cyclictest	96836	-21	ssh	23:22:43	7
3721920	99	33	31,1	cyclictest	227958	-21	ssh	00:17:42	7
3721920	99	33	0,32	cyclictest	251406	-21	ssh	00:26:59	7
3721912	99	33	31,2	cyclictest	4172155	-21	kworker/u16:0+events_unbound	22:37:27	6
3721912	99	33	31,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	23:09:05	6
3721912	99	33	31,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	21:37:35	6
3721912	99	33	31,2	cyclictest	3791366	-21	kworker/u16:2+events_unbound	21:22:20	6
3721912	99	33	31,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	00:18:43	6
3721904	99	33	31,2	cyclictest	3773661	-21	kworker/u16:0+events_unbound	21:08:28	4
3721904	99	33	31,2	cyclictest	170354	-21	kworker/u16:4+events_unbound	00:07:38	4
3721920	99	32	32,0	cyclictest	0	-21	swapper/7	22:55:39	7
3721920	99	32	31,0	cyclictest	0	-21	swapper/7	00:33:30	7
3721904	99	32	30,2	cyclictest	26309	-21	kworker/u16:0+events_unbound	23:01:49	4
4001748	2	31	0,1	chrt	4001746	-21	ssh	21:23:22	7
3721912	99	31	29,2	cyclictest	3975099	-21	kworker/u16:4+events_unbound	21:11:35	6
3721912	99	31	29,2	cyclictest	3721320	-21	kworker/u16:3+events_unbound	19:16:15	6
3721920	99	30	30,0	cyclictest	0	-21	swapper/7	23:27:15	7
3721920	99	30	30,0	cyclictest	0	-21	swapper/7	21:09:23	7
3721920	99	30	29,0	cyclictest	0	-21	swapper/7	23:46:18	7
3721904	99	30	28,2	cyclictest	98607	-21	kworker/u16:3+flush-8:0	23:50:38	4
3721904	99	30	28,2	cyclictest	98607	-21	kworker/u16:3+flush-8:0	23:41:21	4
3721904	99	30	28,2	cyclictest	96221	-21	kworker/u16:1+events_unbound	00:02:45	4
3721904	99	30	28,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:17:50	4
3721904	99	30	28,2	cyclictest	4074051	-21	kworker/u16:4+events_unbound	22:14:25	4
3721904	99	30	28,2	cyclictest	4015065	-21	kworker/u16:0+events_unbound	22:00:01	4
3721920	99	29	29,0	cyclictest	0	-21	swapper/7	22:39:59	7
3721920	99	29	29,0	cyclictest	0	-21	swapper/7	22:13:19	7
3721920	99	29	29,0	cyclictest	0	-21	swapper/7	21:53:54	7
3721920	99	29	29,0	cyclictest	0	-21	swapper/7	00:23:50	7
3721920	99	29	27,1	cyclictest	4109963	-21	ssh	22:08:06	7
3721912	99	29	27,2	cyclictest	3773661	-21	kworker/u16:0+events_unbound	20:46:13	6
3721904	99	29	27,2	cyclictest	4135968	-21	kworker/u16:5+events_unbound	22:48:12	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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