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 Jun 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
458295	2	91	0,0	sleep4	0	-21	swapper/4	19:51:22	4
359066	2	59	48,8	sleep4	0	-21	swapper/4	19:04:52	4
359433	99	49	46,2	cyclictest	1063568	-21	kworker/u16:5+flush-8:0	00:35:59	5
359431	99	49	46,2	cyclictest	450097	-21	kworker/u16:1+flush-8:0	20:01:16	4
358914	2	49	39,7	sleep5	0	-21	swapper/5	19:02:44	5
359431	99	48	46,2	cyclictest	760450	-21	kworker/u16:4+events_unbound	22:41:14	4
359438	99	46	41,4	cyclictest	497713	-21	latency_hist	20:16:00	7
359434	99	46	43,2	cyclictest	555817	-21	kworker/u16:0+flush-8:0	20:56:01	6
359433	99	42	39,2	cyclictest	929468	-21	kworker/u16:1+events_unbound	23:45:59	5
358860	2	42	6,31	sleep7	0	-21	swapper/7	19:01:58	7
359433	99	39	36,2	cyclictest	312143	-21	kworker/u16:0+flush-8:0	19:51:00	5
359438	99	38	36,1	cyclictest	0	-21	swapper/7	21:41:14	7
359434	99	36	33,2	cyclictest	312143	-21	kworker/u16:0+events_unbound	19:11:20	6
359438	99	35	30,4	cyclictest	870885	-21	latency_hist	23:01:00	7
359438	99	34	31,2	cyclictest	124	-21	kswapd0	22:31:13	7
359431	99	34	32,2	cyclictest	525782	-21	kworker/u16:4+flush-8:0	20:36:15	4
359438	99	33	32,0	cyclictest	0	-21	swapper/7	23:06:10	7
359431	99	33	31,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	22:46:28	4
359431	99	33	31,2	cyclictest	359642	-21	kworker/u16:3+flush-8:0	19:11:05	4
359431	99	33	31,2	cyclictest	312143	-21	kworker/u16:0+flush-8:0	20:16:16	4
359434	99	32	30,2	cyclictest	517366	-21	kworker/u16:3+flush-8:0	20:31:19	6
359434	99	32	30,2	cyclictest	286410	-21	kworker/u16:1+flush-8:0	19:21:20	6
359431	99	32	30,2	cyclictest	546044	-21	kworker/u16:1+events_unbound	20:46:15	4
359431	99	32	30,2	cyclictest	312143	-21	kworker/u16:0+flush-8:0	20:21:16	4
359431	99	32	30,2	cyclictest	312143	-21	kworker/u16:0+events_unbound	20:06:25	4
359433	99	31	28,2	cyclictest	808582	-21	kworker/u16:2+flush-8:0	00:01:02	5
359434	99	30	28,2	cyclictest	450097	-21	kworker/u16:1+flush-8:0	20:01:26	6
359433	99	29	27,2	cyclictest	760450	-21	kworker/u16:4+flush-8:0	23:27:02	5
359431	99	29	26,2	cyclictest	603622	-21	kworker/u16:0+events_unbound	21:51:18	4
359433	99	28	26,2	cyclictest	676464	-21	kworker/u16:3+events_unbound	21:37:43	5
359433	99	28	26,2	cyclictest	603622	-21	kworker/u16:0+events_unbound	21:26:19	5
359431	99	28	26,2	cyclictest	760450	-21	kworker/u16:4+flush-8:0	23:06:22	4
1039054	2	28	0,1	chrt	1039055	-21	sh	00:10:41	7
652322	2	27	0,1	chrt	652321	-21	ssh	21:26:52	7
359438	99	27	22,4	cyclictest	726750	-21	latency_hist	22:01:00	7
359433	99	27	25,2	cyclictest	808582	-21	kworker/u16:2+flush-8:0	23:17:52	5
359433	99	27	25,2	cyclictest	808582	-21	kworker/u16:2+events_unbound	00:11:19	5
359433	99	27	25,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	22:41:20	5
359431	99	27	25,2	cyclictest	603622	-21	kworker/u16:0+events_unbound	22:31:14	4
359438	99	26	25,0	cyclictest	0	-21	swapper/7	22:46:15	7
359438	99	26	24,1	cyclictest	0	-21	swapper/7	22:26:19	7
359438	99	26	24,1	cyclictest	0	-21	swapper/7	22:26:19	7
359433	99	26	24,2	cyclictest	760450	-21	kworker/u16:4+flush-8:0	22:56:06	5
359431	99	26	24,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	23:16:30	4
359431	99	26	24,2	cyclictest	1003557	-21	kworker/u16:3+events_unbound	00:16:22	4
359438	99	25	23,1	cyclictest	594005	-21	diskmemload	21:51:26	7
359433	99	25	23,2	cyclictest	749219	-21	kworker/u16:3+events_unbound	22:26:32	5
359433	99	25	23,2	cyclictest	749219	-21	kworker/u16:3+events_unbound	22:26:32	5
359431	99	25	23,2	cyclictest	808582	-21	kworker/u16:2+flush-8:0	22:36:31	4
359431	99	25	23,2	cyclictest	808582	-21	kworker/u16:2+events_unbound	23:21:23	4
359431	99	25	23,2	cyclictest	808582	-21	kworker/u16:2+events_unbound	00:06:32	4
359431	99	25	23,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:01:00	4
359146	2	25	15,7	sleep6	0	-21	swapper/6	19:05:58	6
359438	99	24	23,0	cyclictest	0	-21	swapper/7	22:41:23	7
359438	99	24	23,0	cyclictest	0	-21	swapper/7	19:41:16	7
359438	99	24	23,0	cyclictest	0	-21	swapper/7	19:08:07	7
359434	99	24	22,2	cyclictest	808582	-21	kworker/u16:2+events_unbound	22:51:16	6
359434	99	24	22,2	cyclictest	603622	-21	kworker/u16:0+events_unbound	23:26:26	6
359434	99	24	21,3	cyclictest	603622	-21	kworker/u16:0+flush-8:0	21:21:24	6
359433	99	24	22,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	21:55:48	5
359431	99	24	22,2	cyclictest	808582	-21	kworker/u16:2+flush-8:0	23:31:30	4
359431	99	24	22,2	cyclictest	629768	-21	kworker/u16:2+events_unbound	22:06:23	4
359431	99	24	22,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	22:20:55	4
359431	99	24	22,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:06:23	4
359431	99	24	22,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:06:23	4
359431	99	24	22,2	cyclictest	3842942	-21	kworker/u16:2+events_unbound	19:06:25	4
359431	99	24	22,2	cyclictest	1044553	-21	kworker/u16:0+events_unbound	00:26:14	4
359434	99	23	21,2	cyclictest	555817	-21	kworker/u16:0+flush-8:0	20:56:21	6
359433	99	23	21,2	cyclictest	760450	-21	kworker/u16:4+flush-8:0	23:50:22	5
359433	99	23	21,2	cyclictest	749219	-21	kworker/u16:3+events_unbound	22:15:47	5
359433	99	23	19,3	cyclictest	312143	-21	kworker/u16:0+events_unbound	20:21:22	5
359431	99	23	21,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	22:21:24	4
359438	99	22	20,1	cyclictest	0	-21	swapper/7	19:11:23	7
359434	99	22	20,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	23:31:10	6
359434	99	22	0,1	cyclictest	0	-21	swapper/6	22:14:04	6
359433	99	22	20,2	cyclictest	929468	-21	kworker/u16:1+flush-8:0	23:36:15	5
359433	99	22	20,2	cyclictest	760450	-21	kworker/u16:4+flush-8:0	23:33:03	5
359433	99	22	20,2	cyclictest	760450	-21	kworker/u16:4+events_unbound	22:33:32	5
359433	99	22	20,2	cyclictest	286410	-21	kworker/u16:1+flush-8:0	19:21:21	5
359433	99	22	19,2	cyclictest	808582	-21	kworker/u16:2+flush-8:0	22:36:00	5
359433	99	22	19,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:06:44	5
359433	99	22	19,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:06:44	5
359431	99	22	20,2	cyclictest	546044	-21	kworker/u16:1+events_unbound	21:11:16	4
359431	99	22	20,2	cyclictest	546044	-21	kworker/u16:1+events_unbound	20:51:24	4
359431	99	22	20,2	cyclictest	1003557	-21	kworker/u16:3+events_unbound	00:21:23	4
359438	99	21	17,3	cyclictest	615106	-21	ntp_states	21:11:26	7
359434	99	21	19,2	cyclictest	749219	-21	kworker/u16:3+events_unbound	22:26:15	6
359434	99	21	19,2	cyclictest	749219	-21	kworker/u16:3+events_unbound	22:26:15	6
359434	99	21	19,2	cyclictest	603622	-21	kworker/u16:0+events_unbound	22:31:29	6
359434	99	21	19,2	cyclictest	565134	-21	kworker/u16:5+flush-8:0	21:01:21	6
359434	99	21	19,2	cyclictest	312143	-21	kworker/u16:0+flush-8:0	19:46:30	6
359434	99	21	19,2	cyclictest	1044553	-21	kworker/u16:0+flush-8:0	00:11:26	6
359433	99	21	19,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	21:16:31	5
359433	99	21	18,3	cyclictest	555817	-21	kworker/u16:0+flush-8:0	20:56:44	5
359431	99	21	19,2	cyclictest	760450	-21	kworker/u16:4+events_unbound	23:41:23	4
359431	99	21	19,2	cyclictest	629768	-21	kworker/u16:2+events_unbound	21:58:59	4
359431	99	21	19,2	cyclictest	603622	-21	kworker/u16:0+flush-8:0	22:11:16	4
359438	99	20	19,0	cyclictest	0	-21	swapper/7	23:56:13	7
359438	99	20	19,0	cyclictest	0	-21	swapper/7	21:01:15	7
359438	99	20	19,0	cyclictest	0	-21	swapper/7	00:31:29	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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