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 Mon Aug 10, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3265807	2	72	0,1	sleep5	0	-21	swapper/5	23:54:21	5
2620237	2	58	22,31	sleep7	0	-21	swapper/7	19:05:19	7
2620358	2	51	41,7	sleep4	0	-21	swapper/4	19:07:01	4
2620741	99	49	44,4	cyclictest	3219544	-21	latency_hist	23:38:14	7
2620276	2	47	37,7	sleep6	0	-21	swapper/6	19:05:51	6
2620735	99	43	41,2	cyclictest	3173074	-21	kworker/u16:0+events_unbound	23:33:42	5
2620404	2	41	31,7	sleep5	0	-21	swapper/5	19:07:42	5
2620735	99	38	36,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:58:43	5
2620735	99	38	35,2	cyclictest	1834744	-21	kworker/u16:5+events_unbound	19:53:17	5
2620735	99	37	35,2	cyclictest	3231744	-21	kworker/u16:4+events_unbound	00:29:12	5
2620735	99	37	35,2	cyclictest	3217933	-21	kworker/u16:3+flush-8:0	00:03:14	5
2620735	99	37	35,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:27:13	5
2620741	99	36	33,2	cyclictest	2857640	-21	diskmemload	00:08:29	7
2620739	99	36	34,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	00:35:21	6
2620735	99	36	34,2	cyclictest	2644220	-21	kworker/u16:2+events_unbound	21:11:02	5
2620739	99	35	33,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:55:21	6
2620739	99	35	33,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:22:37	6
2620739	99	35	33,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:58:47	6
2620735	99	35	33,2	cyclictest	3111074	-21	kworker/u16:3+events_unbound	22:57:42	5
2620735	99	35	33,2	cyclictest	3035537	-21	kworker/u16:0+events_unbound	22:19:18	5
2620726	99	35	33,2	cyclictest	2610852	-21	kworker/u16:3+flush-8:0	19:38:43	4
2620741	99	34	0,32	cyclictest	2881761	-21	latency_hist	21:18:15	7
2620739	99	34	32,2	cyclictest	3173074	-21	kworker/u16:0+flush-8:0	23:32:36	6
2620739	99	34	32,2	cyclictest	2859399	-21	kworker/u16:0+events_unbound	21:12:53	6
2620739	99	34	32,2	cyclictest	2789457	-21	kworker/u16:1+events_unbound	21:21:04	6
2620735	99	34	32,2	cyclictest	3292391	-21	kworker/u16:2+flush-8:0	00:16:48	5
2620735	99	34	32,2	cyclictest	3159607	-21	kworker/u16:5+events_unbound	23:16:06	5
2620735	99	34	32,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:42:37	5
2620735	99	34	32,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:42:37	5
2620735	99	34	32,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:32:57	5
2620735	99	34	32,2	cyclictest	2918001	-21	kworker/u16:2+events_unbound	21:36:05	5
2620735	99	34	32,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:22:06	5
2620741	99	33	27,5	cyclictest	648	-21	systemd-journal	21:13:15	7
2620739	99	33	31,2	cyclictest	3173074	-21	kworker/u16:0+events_unbound	23:41:17	6
2620739	99	33	31,2	cyclictest	3173074	-21	kworker/u16:0+events_unbound	23:41:17	6
2620739	99	33	31,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:33:05	6
2620735	99	33	31,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	00:35:13	5
2620735	99	33	31,2	cyclictest	2951875	-21	kworker/u16:0+events_unbound	21:54:41	5
2620735	99	33	31,2	cyclictest	2926892	-21	kworker/u16:4+flush-8:0	21:50:33	5
2620735	99	33	31,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:42:49	5
2620735	99	33	31,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:37:48	5
2620735	99	33	31,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:12:02	5
2620735	99	33	31,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	22:16:57	5
2620735	99	33	31,2	cyclictest	2859399	-21	kworker/u16:0+events_unbound	21:32:22	5
2620726	99	33	31,2	cyclictest	3231744	-21	kworker/u16:4+flush-8:0	00:28:29	4
2620741	99	32	27,4	cyclictest	3014491	-21	latency_hist	22:13:15	7
2620739	99	32	30,2	cyclictest	3231744	-21	kworker/u16:4+events_unbound	00:24:48	6
2620739	99	32	30,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:27:48	6
2620739	99	32	30,2	cyclictest	3048750	-21	kworker/u16:1+flush-8:0	22:30:09	6
2620739	99	32	30,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	23:08:09	6
2620739	99	32	30,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	22:04:09	6
2620735	99	32	30,2	cyclictest	3133110	-21	kworker/u16:0+flush-8:0	23:04:17	5
2620735	99	32	30,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:49:28	5
2620735	99	32	30,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:46:30	5
2620735	99	32	30,2	cyclictest	2859399	-21	kworker/u16:0+events_unbound	21:25:53	5
2620735	99	32	30,2	cyclictest	2789457	-21	kworker/u16:1+events_unbound	21:14:45	5
2620741	99	31	0,29	cyclictest	3159186	-21	latency_hist	23:13:15	7
2620739	99	31	29,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	23:36:20	6
2620739	99	31	29,2	cyclictest	3036391	-21	kworker/u16:2+events_unbound	22:37:21	6
2620739	99	31	29,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	21:37:29	6
2620739	99	31	28,2	cyclictest	2644220	-21	kworker/u16:2+events_unbound	19:43:17	6
2620735	99	31	29,2	cyclictest	3217933	-21	kworker/u16:3+flush-8:0	23:49:20	5
2620735	99	31	29,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	23:47:36	5
2620735	99	31	29,2	cyclictest	3048750	-21	kworker/u16:1+events_unbound	22:43:57	5
2620735	99	31	29,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	23:00:13	5
2620735	99	31	29,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	23:00:13	5
2620735	99	31	29,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	22:04:37	5
2620735	99	31	28,2	cyclictest	3231744	-21	kworker/u16:4+events_unbound	00:18:17	5
2620726	99	31	29,2	cyclictest	3231744	-21	kworker/u16:4+events_unbound	00:16:04	4
2620739	99	30	28,2	cyclictest	3325320	-21	kworker/u16:0+events_unbound	00:22:41	6
2620739	99	30	28,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	23:47:09	6
2620739	99	30	28,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	00:09:45	6
2620739	99	30	28,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:09:28	6
2620739	99	30	28,2	cyclictest	3048750	-21	kworker/u16:1+events_unbound	22:41:17	6
2620739	99	30	28,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	21:50:38	6
2620739	99	30	28,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:56:14	6
2620739	99	30	28,2	cyclictest	2789457	-21	kworker/u16:1+events_unbound	20:55:49	6
2620735	99	30	28,2	cyclictest	3279064	-21	kworker/u16:1+events_unbound	00:12:58	5
2620735	99	30	28,2	cyclictest	3231744	-21	kworker/u16:4+events_unbound	00:24:56	5
2620735	99	30	28,2	cyclictest	3217933	-21	kworker/u16:3+events_unbound	00:05:05	5
2620735	99	30	28,2	cyclictest	3205580	-21	kworker/u16:2+events_unbound	23:31:17	5
2620735	99	30	28,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:40:54	5
2620735	99	30	28,2	cyclictest	2892272	-21	kworker/u16:3+events_unbound	21:40:54	5
2620726	99	30	28,2	cyclictest	3173074	-21	kworker/u16:0+events_unbound	00:00:01	4
2620726	99	30	27,3	cyclictest	2926892	-21	kworker/u16:4+flush-8:0	23:23:25	4
2620741	99	29	24,4	cyclictest	2966088	-21	latency_hist	21:53:15	7
2620739	99	29	27,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:14:48	6
2620739	99	29	27,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:46:28	6
2620739	99	29	26,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:58:17	6
2620739	99	29	26,2	cyclictest	2926892	-21	kworker/u16:4+events_unbound	22:58:17	6
2620735	99	29	27,2	cyclictest	3147587	-21	kworker/u16:1+events_unbound	23:19:20	5
2620735	99	29	27,2	cyclictest	3111074	-21	kworker/u16:3+flush-8:0	23:12:28	5
2620735	99	29	27,2	cyclictest	2610852	-21	kworker/u16:3+events_unbound	19:42:26	5
2620726	99	29	27,2	cyclictest	3011503	-21	kworker/u16:1+flush-8:0	22:13:43	4
2620726	99	29	27,2	cyclictest	2610852	-21	kworker/u16:3+events_unbound	19:08:30	4
2620741	99	28	23,4	cyclictest	3340239	-21	latency_hist	00:28:14	7
2620741	99	28	22,5	cyclictest	2711863	-21	latency_hist	19:53:15	7
2620739	99	28	26,2	cyclictest	3292391	-21	kworker/u16:2+flush-8:0	00:15:47	6
2620739	99	28	26,2	cyclictest	3279064	-21	kworker/u16:1+events_unbound	00:06:00	6
2620739	99	28	26,2	cyclictest	2892272	-21	kworker/u16:3+flush-8:0	21:43:13	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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