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 Thu Jan 29, 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
3503804	2	65	0,0	sleep7	3503806	-21	cut	20:17:10	7
3356719	99	54	52,2	cyclictest	3750148	-21	kworker/u16:1+events_unbound	22:27:13	5
3356719	99	51	48,2	cyclictest	3701610	-21	kworker/u16:0+events_unbound	22:47:03	5
3356719	99	51	48,2	cyclictest	3701610	-21	kworker/u16:0+events_unbound	22:47:03	5
3356296	2	51	17,30	sleep7	0	-21	swapper/7	19:04:59	7
3356719	99	50	47,2	cyclictest	3846371	-21	kworker/u16:1+events_unbound	22:57:03	5
3356719	99	49	47,2	cyclictest	4003818	-21	kworker/u16:4+events_unbound	00:32:02	5
3356717	99	49	45,3	cyclictest	3810280	-21	kworker/u16:2+flush-8:0	23:12:04	4
3356719	99	47	45,2	cyclictest	3701610	-21	kworker/u16:0+events_unbound	23:02:22	5
3356719	99	47	45,2	cyclictest	3583120	-21	kworker/u16:1+events_unbound	21:27:21	5
3356719	99	46	44,2	cyclictest	3965408	-21	kworker/u16:2+events_unbound	23:42:02	5
3356717	99	46	43,3	cyclictest	3750148	-21	kworker/u16:1+flush-8:0	22:26:48	4
3356719	99	45	43,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:51:47	5
3356723	99	44	41,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	21:51:48	6
3356719	99	44	42,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:52:20	5
3356719	99	44	42,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	21:37:17	5
3356719	99	42	39,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	21:42:01	5
3356717	99	42	40,2	cyclictest	3292909	-21	kworker/u16:0+events_unbound	19:12:03	4
3356717	99	42	40,2	cyclictest	3292909	-21	kworker/u16:0+events_unbound	19:12:03	4
3356719	99	40	38,2	cyclictest	4039307	-21	kworker/u16:0+events_unbound	00:22:20	5
3356719	99	40	38,2	cyclictest	3846371	-21	kworker/u16:1+events_unbound	23:20:38	5
3356719	99	40	38,2	cyclictest	3810280	-21	kworker/u16:2+events_unbound	22:56:13	5
3356719	99	40	38,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	21:57:20	5
3356723	99	39	36,2	cyclictest	3665016	-21	kworker/u16:2+flush-8:0	21:52:16	6
3356719	99	39	37,2	cyclictest	4003817	-21	kworker/u16:1+events_unbound	00:11:50	5
3356719	99	39	37,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:57:21	5
3356719	99	39	37,2	cyclictest	3701611	-21	kworker/u16:4+events_unbound	22:07:17	5
3356719	99	39	37,2	cyclictest	3701611	-21	kworker/u16:4+events_unbound	22:07:17	5
3356719	99	39	37,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	21:17:14	5
3356719	99	39	37,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	19:47:06	5
3356719	99	39	37,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	19:32:13	5
3356719	99	39	36,2	cyclictest	3822719	-21	kworker/u16:3+flush-8:0	22:42:12	5
3356719	99	39	36,2	cyclictest	3665016	-21	kworker/u16:2+events_unbound	21:52:01	5
3356719	99	39	36,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	20:47:02	5
3356719	99	39	36,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	20:47:02	5
3356725	99	38	33,4	cyclictest	3773978	-21	latency_hist	22:21:48	7
3356719	99	38	36,2	cyclictest	4039307	-21	kworker/u16:0+events_unbound	00:18:58	5
3356719	99	38	36,2	cyclictest	4003817	-21	kworker/u16:1+events_unbound	00:05:57	5
3356719	99	38	36,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	20:46:47	5
3356717	99	38	34,3	cyclictest	3379752	-21	kworker/u16:2+flush-8:0	20:07:05	4
3356360	2	38	28,7	sleep5	0	-21	swapper/5	19:05:54	5
3356719	99	37	35,2	cyclictest	3846371	-21	kworker/u16:1+flush-8:0	23:22:08	5
3356719	99	37	35,2	cyclictest	3750148	-21	kworker/u16:1+events_unbound	22:36:50	5
3356719	99	37	35,2	cyclictest	3701610	-21	kworker/u16:0+events_unbound	23:07:58	5
3356719	99	37	34,2	cyclictest	3701610	-21	kworker/u16:0+events_unbound	23:11:49	5
3356723	99	36	32,3	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	19:36:48	6
3356719	99	36	34,2	cyclictest	4003817	-21	kworker/u16:1+events_unbound	00:08:57	5
3356719	99	36	34,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	20:17:02	5
3356719	99	36	32,3	cyclictest	3292909	-21	kworker/u16:0+flush-8:0	19:11:48	5
3356717	99	36	33,2	cyclictest	3348010	-21	kworker/u16:1+events_unbound	19:47:02	4
3356723	99	35	33,2	cyclictest	4003817	-21	kworker/u16:1+flush-8:0	00:17:22	6
3356723	99	35	33,2	cyclictest	3750148	-21	kworker/u16:1+flush-8:0	22:37:13	6
3356719	99	35	33,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:37:19	5
3356719	99	35	33,2	cyclictest	3701610	-21	kworker/u16:0+flush-8:0	22:12:13	5
3356719	99	35	33,2	cyclictest	3379752	-21	kworker/u16:2+events_unbound	19:27:02	5
3356719	99	35	32,2	cyclictest	3846371	-21	kworker/u16:1+events_unbound	23:26:48	5
3356719	99	35	32,2	cyclictest	3846371	-21	kworker/u16:1+events_unbound	23:26:48	5
3356723	99	34	31,2	cyclictest	3701611	-21	kworker/u16:4+flush-8:0	22:06:47	6
3356723	99	34	31,2	cyclictest	3524943	-21	kworker/u16:0+flush-8:0	20:57:14	6
3356719	99	34	32,2	cyclictest	3701611	-21	kworker/u16:4+events_unbound	22:04:57	5
3356719	99	34	32,2	cyclictest	3583120	-21	kworker/u16:1+events_unbound	21:48:57	5
3356719	99	34	32,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	20:56:50	5
3356719	99	34	31,2	cyclictest	3737685	-21	kworker/u16:3+events_unbound	22:16:50	5
3356717	99	34	32,2	cyclictest	3822719	-21	kworker/u16:3+flush-8:0	22:47:49	4
3356717	99	34	32,2	cyclictest	3822719	-21	kworker/u16:3+flush-8:0	22:47:49	4
3356719	99	33	31,2	cyclictest	3737685	-21	kworker/u16:3+events_unbound	22:31:57	5
3356719	99	33	31,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	19:42:03	5
3356717	99	33	30,2	cyclictest	3701610	-21	kworker/u16:0+flush-8:0	22:46:47	4
3356725	99	32	27,4	cyclictest	4027624	-21	latency_hist	00:06:47	7
3356723	99	32	29,2	cyclictest	3583120	-21	kworker/u16:1+flush-8:0	21:37:06	6
3356719	99	32	30,2	cyclictest	3524943	-21	kworker/u16:0+events_unbound	21:22:59	5
3356719	99	32	30,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	20:02:03	5
3356719	99	32	29,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	21:12:01	5
3356717	99	32	30,2	cyclictest	3348010	-21	kworker/u16:1+flush-8:0	19:37:19	4
3356717	99	31	28,3	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	21:11:48	4
3356717	99	31	28,3	cyclictest	3397479	-21	kworker/u16:3+events_unbound	21:22:13	4
3356155	2	31	20,7	sleep6	0	-21	swapper/6	19:02:58	6
3356719	99	30	28,2	cyclictest	4039307	-21	kworker/u16:0+events_unbound	00:28:58	5
3356719	99	30	27,2	cyclictest	3524943	-21	kworker/u16:0+events_unbound	21:31:57	5
3356717	99	30	28,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:57:13	4
3434770	2	29	0,0	sleep6	0	-21	swapper/6	19:42:07	6
3356725	99	29	24,4	cyclictest	3979247	-21	latency_hist	23:46:48	7
3356723	99	29	26,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	20:32:15	6
3356719	99	29	27,2	cyclictest	3952029	-21	kworker/u16:3+events_unbound	23:33:26	5
3356719	99	29	27,2	cyclictest	3783283	-21	kworker/u16:4+events_unbound	22:25:26	5
3356719	99	29	27,2	cyclictest	3524943	-21	kworker/u16:0+events_unbound	21:07:12	5
3356717	99	29	27,2	cyclictest	4003817	-21	kworker/u16:1+flush-8:0	00:22:16	4
3356717	99	29	27,2	cyclictest	4003817	-21	kworker/u16:1+flush-8:0	00:06:43	4
3356717	99	29	27,2	cyclictest	3397479	-21	kworker/u16:3+events_unbound	21:57:49	4
3356717	99	29	26,2	cyclictest	3846371	-21	kworker/u16:1+flush-8:0	22:52:03	4
3356717	99	29	26,2	cyclictest	3737685	-21	kworker/u16:3+flush-8:0	22:32:17	4
3356723	99	28	26,2	cyclictest	3292909	-21	kworker/u16:0+flush-8:0	19:22:19	6
3356723	99	28	25,2	cyclictest	3846371	-21	kworker/u16:1+flush-8:0	23:31:57	6
3356191	2	28	17,8	sleep4	0	-21	swapper/4	19:03:28	4
3356723	99	27	25,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	20:41:47	6
3356723	99	27	25,2	cyclictest	3397479	-21	kworker/u16:3+flush-8:0	20:01:48	6
3356717	99	27	25,2	cyclictest	3952029	-21	kworker/u16:3+flush-8:0	23:56:48	4
3356717	99	27	23,2	cyclictest	3737685	-21	kworker/u16:3+events_unbound	22:26:50	4
3356723	99	26	24,2	cyclictest	3846371	-21	kworker/u16:1+flush-8:0	23:27:28	6
3356723	99	26	24,2	cyclictest	3846371	-21	kworker/u16:1+flush-8:0	23:27:28	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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