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 Dec 06, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4126171	99	53	0,51	cyclictest	541912	-21	latency_hist	20:22:35	7
4125697	2	53	43,7	sleep4	0	-21	swapper/4	15:21:01	4
4125566	2	51	16,30	sleep7	0	-21	swapper/7	15:19:12	7
4126161	99	50	48,2	cyclictest	360144	-21	kworker/u16:0+events_unbound	19:23:49	4
4126171	99	49	44,4	cyclictest	589235	-21	systemd-journal	17:32:36	7
4125519	2	46	35,8	sleep6	0	-21	swapper/6	15:18:30	6
4126161	99	45	43,2	cyclictest	360144	-21	kworker/u16:0+events_unbound	19:31:18	4
4126161	99	45	42,3	cyclictest	340121	-21	kworker/u16:1+flush-8:0	18:42:35	4
4126171	99	44	39,4	cyclictest	572111	-21	latency_hist	20:37:34	7
4126170	99	44	42,2	cyclictest	279587	-21	kworker/u16:5+events_unbound	18:13:04	6
4126161	99	43	41,2	cyclictest	98922	-21	kworker/u16:3+flush-8:0	16:48:02	4
4125651	2	43	33,7	sleep5	0	-21	swapper/5	15:20:22	5
4126171	99	42	36,5	cyclictest	309806	-21	latency_hist	18:27:35	7
4126170	99	42	40,2	cyclictest	107900	-21	kworker/u16:4+events_unbound	16:49:57	6
4126161	99	42	40,2	cyclictest	510755	-21	kworker/u16:4+events_unbound	20:50:19	4
4126171	99	41	36,4	cyclictest	4180523	-21	latency_hist	15:47:36	7
4126170	99	40	38,2	cyclictest	400427	-21	kworker/u16:4+events_unbound	19:35:26	6
4126170	99	40	38,2	cyclictest	16039	-21	kworker/u16:4+events_unbound	16:17:38	6
4126170	99	40	38,2	cyclictest	16039	-21	kworker/u16:4+events_unbound	16:17:38	6
4126161	99	40	38,2	cyclictest	510755	-21	kworker/u16:4+events_unbound	20:11:18	4
4126161	99	40	38,2	cyclictest	471033	-21	kworker/u16:4+events_unbound	19:48:01	4
4126161	99	40	37,2	cyclictest	4095568	-21	kworker/u16:2+events_unbound	15:57:38	4
4126161	99	39	36,2	cyclictest	178553	-21	kworker/u16:1+flush-8:0	17:52:58	4
4126161	99	39	36,2	cyclictest	157565	-21	kworker/u16:6+flush-8:0	17:13:06	4
4126170	99	38	36,2	cyclictest	4170401	-21	kworker/u16:0+flush-8:0	17:00:22	6
4126166	99	38	35,2	cyclictest	179096	-21	kworker/u16:3+events_unbound	17:37:59	5
4126161	99	38	36,2	cyclictest	4095568	-21	kworker/u16:2+events_unbound	16:11:19	4
4126171	99	37	32,4	cyclictest	299704	-21	latency_hist	18:22:35	7
4126170	99	37	35,2	cyclictest	4095568	-21	kworker/u16:2+flush-8:0	15:23:02	6
4126170	99	37	34,2	cyclictest	208895	-21	kworker/u16:0+events_unbound	17:37:38	6
4126161	99	37	35,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:37:22	4
4126170	99	36	34,2	cyclictest	481425	-21	kworker/u16:2+events_unbound	19:55:20	6
4126170	99	36	34,2	cyclictest	340121	-21	kworker/u16:1+events_unbound	18:49:21	6
4126170	99	36	33,2	cyclictest	179096	-21	kworker/u16:3+events_unbound	17:52:46	6
4126170	99	36	33,2	cyclictest	107900	-21	kworker/u16:4+events_unbound	17:07:38	6
4126161	99	36	34,2	cyclictest	4140485	-21	kworker/u16:1+events_unbound	15:44:19	4
4126161	99	36	32,3	cyclictest	400427	-21	kworker/u16:4+flush-8:0	19:17:35	4
4126171	99	35	29,5	cyclictest	229047	-21	latency_hist	17:47:35	7
4126170	99	35	33,2	cyclictest	4105602	-21	kworker/u16:3+events_unbound	15:54:21	6
4126170	99	35	32,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:07:38	6
4126161	99	35	33,2	cyclictest	279587	-21	kworker/u16:5+events_unbound	18:17:30	4
4126171	99	34	33,0	cyclictest	0	-21	swapper/7	18:51:18	7
4126170	99	34	32,2	cyclictest	4140485	-21	kworker/u16:1+events_unbound	16:02:35	6
4126170	99	34	32,2	cyclictest	360144	-21	kworker/u16:0+events_unbound	19:42:50	6
4126166	99	34	29,4	cyclictest	319621	-21	packagekitd	18:28:58	5
4126161	99	34	32,2	cyclictest	501545	-21	kworker/u16:3+events_unbound	20:33:00	4
4126161	99	34	32,2	cyclictest	481151	-21	kworker/u16:1+events_unbound	20:28:26	4
4126161	99	34	32,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:23:06	4
4126161	99	34	32,2	cyclictest	309475	-21	kworker/u16:2+events_unbound	18:35:19	4
4126161	99	34	32,2	cyclictest	309475	-21	kworker/u16:2+events_unbound	18:35:19	4
4126161	99	34	32,2	cyclictest	259401	-21	kworker/u16:3+events_unbound	18:05:50	4
552353	2	33	0,0	sleep7	552354	-21	cat	20:27:35	7
4126170	99	33	31,2	cyclictest	481151	-21	kworker/u16:1+events_unbound	19:57:37	6
4126170	99	33	31,2	cyclictest	400427	-21	kworker/u16:4+events_unbound	19:32:19	6
4126170	99	33	30,2	cyclictest	279587	-21	kworker/u16:5+events_unbound	19:07:55	6
4126161	99	33	31,2	cyclictest	179096	-21	kworker/u16:3+events_unbound	17:38:03	4
4126161	99	33	29,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:22:35	4
4126161	99	33	29,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:22:35	4
4126171	99	32	31,0	cyclictest	0	-21	swapper/7	19:17:39	7
4126170	99	32	30,2	cyclictest	98922	-21	kworker/u16:3+events_unbound	17:06:20	6
4126170	99	32	30,2	cyclictest	98922	-21	kworker/u16:3+events_unbound	17:06:20	6
4126170	99	32	30,2	cyclictest	510755	-21	kworker/u16:4+flush-8:0	20:15:38	6
4126170	99	32	30,2	cyclictest	481151	-21	kworker/u16:1+events_unbound	20:05:18	6
4126170	99	32	30,2	cyclictest	259401	-21	kworker/u16:3+events_unbound	18:06:27	6
4126171	99	31	26,4	cyclictest	27068	-21	latency_hist	16:07:35	7
4126170	99	31	29,2	cyclictest	581996	-21	kworker/u16:0+events_unbound	20:42:36	6
4126170	99	31	29,2	cyclictest	501545	-21	kworker/u16:3+flush-8:0	20:21:33	6
4126170	99	31	29,2	cyclictest	299449	-21	kworker/u16:0+events_unbound	18:40:26	6
4126170	99	31	29,2	cyclictest	249167	-21	kworker/u16:2+events_unbound	17:59:47	6
4126170	99	31	29,2	cyclictest	149322	-21	kworker/u16:2+events_unbound	17:17:20	6
4126170	99	31	28,2	cyclictest	57480	-21	kworker/u16:3+events_unbound	16:22:49	6
4126170	99	31	27,3	cyclictest	259402	-21	kworker/u16:4+flush-8:0	18:29:02	6
4126161	99	31	29,2	cyclictest	501545	-21	kworker/u16:3+events_unbound	20:26:37	4
4126161	99	31	29,2	cyclictest	501545	-21	kworker/u16:3+events_unbound	20:22:19	4
4126161	99	31	29,2	cyclictest	4170401	-21	kworker/u16:0+events_unbound	16:03:47	4
4126171	99	30	25,4	cyclictest	118091	-21	latency_hist	16:52:35	7
4126170	99	30	28,2	cyclictest	77732	-21	kworker/u16:2+events_unbound	16:45:54	6
4126170	99	30	28,2	cyclictest	501545	-21	kworker/u16:3+flush-8:0	20:12:18	6
4126170	99	30	28,2	cyclictest	501545	-21	kworker/u16:3+events_unbound	20:37:23	6
4126170	99	30	28,2	cyclictest	4140485	-21	kworker/u16:1+events_unbound	15:41:21	6
4126170	99	30	28,2	cyclictest	360144	-21	kworker/u16:0+flush-8:0	19:01:34	6
4126170	99	30	28,2	cyclictest	178553	-21	kworker/u16:1+events_unbound	18:20:20	6
4126170	99	30	28,2	cyclictest	178553	-21	kworker/u16:1+events_unbound	17:32:27	6
4126166	99	30	28,2	cyclictest	107900	-21	kworker/u16:4+events_unbound	16:58:15	5
4126161	99	30	28,2	cyclictest	400427	-21	kworker/u16:4+events_unbound	19:19:21	4
4126161	99	30	28,2	cyclictest	400412	-21	kworker/u16:3+events_unbound	19:43:51	4
4126161	99	30	28,2	cyclictest	400412	-21	kworker/u16:3+events_unbound	19:40:33	4
4126171	99	29	28,0	cyclictest	0	-21	swapper/7	17:55:19	7
4126171	99	29	23,5	cyclictest	589235	-21	systemd-journal	17:48:19	7
4126171	99	29	23,5	cyclictest	589235	-21	systemd-journal	17:48:19	7
4126170	99	29	27,2	cyclictest	57480	-21	kworker/u16:3+events_unbound	16:34:30	6
4126170	99	29	27,2	cyclictest	360144	-21	kworker/u16:0+events_unbound	19:07:20	6
4126170	99	29	27,2	cyclictest	340121	-21	kworker/u16:1+flush-8:0	18:43:01	6
4126170	99	29	27,2	cyclictest	309475	-21	kworker/u16:2+events_unbound	18:34:18	6
4126170	99	29	27,2	cyclictest	309475	-21	kworker/u16:2+events_unbound	18:34:18	6
4126166	99	29	27,2	cyclictest	77732	-21	kworker/u16:2+events_unbound	16:38:03	5
4126166	99	29	27,2	cyclictest	450868	-21	kworker/u16:1+flush-8:0	19:38:15	5
4126161	99	29	27,2	cyclictest	481425	-21	kworker/u16:2+flush-8:0	19:55:33	4
4126161	99	29	27,2	cyclictest	157565	-21	kworker/u16:6+flush-8:0	17:10:22	4
4126161	99	29	27,2	cyclictest	128282	-21	kworker/u16:5+events_unbound	17:28:01	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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