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 Fri Jan 23, 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
3826862	2	93	0,0	sleep4	0	-21	swapper/4	19:52:12	4
156964	2	90	0,0	sleep6	0	-21	swapper/6	23:42:29	6
4175991	2	67	0,1	sleep7	4175992	-21	rm	22:29:05	7
3735747	2	66	56,7	sleep6	0	-21	swapper/6	19:03:27	6
3735709	2	59	49,7	sleep5	0	-21	swapper/5	19:02:54	5
3736312	99	54	52,2	cyclictest	4068530	-21	kworker/u16:1+events_unbound	21:47:26	4
3736312	99	54	51,2	cyclictest	4083529	-21	kworker/u16:3+events_unbound	22:02:29	4
3735995	2	53	19,30	sleep7	0	-21	swapper/7	19:06:57	7
3736312	99	52	50,2	cyclictest	152310	-21	kworker/u16:1+events_unbound	23:42:25	4
3735970	2	51	41,7	sleep4	0	-21	swapper/4	19:06:38	4
3736312	99	50	48,2	cyclictest	4083529	-21	kworker/u16:3+flush-8:0	22:12:26	4
3736312	99	48	46,2	cyclictest	20876	-21	kworker/u16:2+events_unbound	22:52:25	4
3736312	99	48	45,2	cyclictest	3832410	-21	kworker/u16:0+events_unbound	20:17:30	4
3736312	99	48	45,2	cyclictest	3818779	-21	kworker/u16:4+events_unbound	20:22:27	4
3736312	99	46	43,2	cyclictest	4068530	-21	kworker/u16:1+events_unbound	22:07:14	4
3736312	99	45	43,2	cyclictest	4153409	-21	kworker/u16:0+events_unbound	23:22:46	4
3736312	99	45	43,2	cyclictest	260584	-21	kworker/u16:4+events_unbound	00:27:28	4
3736312	99	43	41,2	cyclictest	129489	-21	kworker/u16:4+events_unbound	23:32:29	4
3736312	99	43	40,2	cyclictest	3048660	-21	kworker/u16:0+flush-8:0	19:17:27	4
3736312	99	43	40,2	cyclictest	184657	-21	kworker/u16:0+events_unbound	00:02:13	4
3736320	99	42	36,5	cyclictest	3797888	-21	latency_hist	19:37:12	7
3736312	99	42	40,2	cyclictest	3935797	-21	kworker/u16:2+events_unbound	21:52:25	4
3736312	99	41	39,2	cyclictest	4068530	-21	kworker/u16:1+events_unbound	22:22:33	4
3736312	99	41	39,2	cyclictest	3935797	-21	kworker/u16:2+flush-8:0	21:57:44	4
3736312	99	41	38,2	cyclictest	3737524	-21	kworker/u16:1+events_unbound	19:22:24	4
3736312	99	41	38,2	cyclictest	3737524	-21	kworker/u16:1+events_unbound	19:22:24	4
3736312	99	41	37,3	cyclictest	3875448	-21	kworker/u16:3+flush-8:0	20:32:30	4
3736312	99	39	37,2	cyclictest	3972059	-21	kworker/u16:3+events_unbound	21:19:14	4
3736312	99	39	37,2	cyclictest	3894080	-21	kworker/u16:1+flush-8:0	21:12:57	4
3736312	99	39	36,2	cyclictest	187792	-21	kworker/u16:1+events_unbound	23:57:41	4
3736312	99	38	36,2	cyclictest	4091614	-21	kworker/u16:4+events_unbound	22:18:29	4
3736312	99	38	36,2	cyclictest	235533	-21	kworker/u16:0+events_unbound	00:19:42	4
3736312	99	38	36,2	cyclictest	115039	-21	kworker/u16:2+events_unbound	23:39:21	4
3736320	99	37	31,5	cyclictest	3904035	-21	latency_hist	20:32:12	7
3736312	99	37	35,2	cyclictest	4153409	-21	kworker/u16:0+events_unbound	23:30:12	4
3736312	99	37	35,2	cyclictest	4054066	-21	kworker/u16:3+events_unbound	21:42:43	4
3736312	99	37	35,2	cyclictest	3935797	-21	kworker/u16:2+flush-8:0	21:32:45	4
3736312	99	37	34,2	cyclictest	129488	-21	kworker/u16:3+events_unbound	23:47:26	4
3736312	99	36	34,2	cyclictest	4091614	-21	kworker/u16:4+events_unbound	22:31:09	4
3736312	99	36	34,2	cyclictest	187792	-21	kworker/u16:1+events_unbound	00:34:45	4
3736312	99	35	33,2	cyclictest	4153409	-21	kworker/u16:0+events_unbound	22:45:21	4
3736312	99	35	33,2	cyclictest	3935797	-21	kworker/u16:2+events_unbound	21:24:17	4
3736312	99	35	33,2	cyclictest	3935797	-21	kworker/u16:2+events_unbound	21:11:13	4
3736312	99	35	33,2	cyclictest	3894080	-21	kworker/u16:1+flush-8:0	21:27:45	4
3736312	99	35	33,2	cyclictest	235533	-21	kworker/u16:0+events_unbound	00:14:41	4
3736312	99	35	33,2	cyclictest	129489	-21	kworker/u16:4+events_unbound	23:54:32	4
167168	2	35	0,1	chrt	167167	-21	ip_192.168.115.	23:47:27	7
3736320	99	34	33,0	cyclictest	0	-21	swapper/7	23:52:46	7
3736312	99	34	32,2	cyclictest	3935797	-21	kworker/u16:2+events_unbound	21:37:44	4
3736312	99	33	31,2	cyclictest	43433	-21	kworker/u16:3+events_unbound	23:17:36	4
3736312	99	33	31,2	cyclictest	4153409	-21	kworker/u16:0+events_unbound	22:38:50	4
3736312	99	33	30,2	cyclictest	235533	-21	kworker/u16:0+flush-8:0	00:22:21	4
3736312	99	32	30,2	cyclictest	81452	-21	kworker/u16:4+events_unbound	23:15:01	4
3736312	99	32	30,2	cyclictest	43433	-21	kworker/u16:3+events_unbound	23:12:05	4
3736312	99	32	30,2	cyclictest	43433	-21	kworker/u16:3+events_unbound	23:04:05	4
3736312	99	32	30,2	cyclictest	4153409	-21	kworker/u16:0+flush-8:0	22:57:48	4
3736312	99	32	30,2	cyclictest	4153409	-21	kworker/u16:0+flush-8:0	22:57:48	4
3736312	99	32	30,2	cyclictest	4091614	-21	kworker/u16:4+flush-8:0	22:32:27	4
3736312	99	32	30,2	cyclictest	3818779	-21	kworker/u16:4+events_unbound	20:27:26	4
3736312	99	32	30,2	cyclictest	214332	-21	kworker/u16:3+events_unbound	00:07:43	4
3736312	99	31	29,2	cyclictest	20876	-21	kworker/u16:2+events_unbound	22:51:46	4
3736317	99	30	22,4	cyclictest	235533	-21	kworker/u16:0+flush-8:0	00:17:11	6
3953842	2	28	0,1	chrt	3953843	-21	irqcore	20:57:29	7
3953842	2	28	0,1	chrt	3953843	-21	irqcore	20:57:29	7
3736320	99	27	24,2	cyclictest	129592	-21	latency_hist	23:32:11	7
3736312	99	27	25,2	cyclictest	3894080	-21	kworker/u16:1+events_unbound	20:52:39	4
3736312	99	27	25,2	cyclictest	3832410	-21	kworker/u16:0+flush-8:0	20:02:11	4
3736312	99	27	24,2	cyclictest	3737524	-21	kworker/u16:1+events_unbound	19:32:14	4
3736320	99	26	22,3	cyclictest	124	-21	kswapd0	23:07:11	7
3736315	99	26	24,2	cyclictest	4083529	-21	kworker/u16:3+flush-8:0	22:08:06	5
3736312	99	26	24,2	cyclictest	3818779	-21	kworker/u16:4+events_unbound	19:52:31	4
3736312	99	25	23,2	cyclictest	3798100	-21	kworker/u16:0+events_unbound	19:45:41	4
3736320	99	24	0,23	cyclictest	902	-21	dbus-daemon	21:27:12	7
3736317	99	24	14,7	cyclictest	260584	-21	kworker/u16:4+flush-8:0	00:32:11	6
3736320	99	23	18,4	cyclictest	4080622	-21	latency_hist	21:52:12	7
3736315	99	23	21,2	cyclictest	3935797	-21	kworker/u16:2+flush-8:0	21:37:31	5
3736315	99	23	21,2	cyclictest	3875448	-21	kworker/u16:3+flush-8:0	20:17:37	5
3736320	99	22	19,2	cyclictest	135833	-21	kthreadcore	23:32:33	7
3736320	99	22	16,5	cyclictest	214271	-21	latency_hist	00:07:12	7
3736317	99	22	20,2	cyclictest	78058	-21	kworker/u16:2+flush-8:0	23:12:11	6
3736320	99	21	0,20	cyclictest	4057963	-21	grep	21:42:28	7
3736312	99	21	19,2	cyclictest	3935797	-21	kworker/u16:2+flush-8:0	20:57:31	4
3736312	99	21	19,2	cyclictest	3935797	-21	kworker/u16:2+flush-8:0	20:57:31	4
3736312	99	21	18,2	cyclictest	3894080	-21	kworker/u16:1+flush-8:0	20:42:32	4
3736312	99	20	18,2	cyclictest	3832410	-21	kworker/u16:0+events_unbound	20:09:22	4
3736312	99	20	18,2	cyclictest	3707258	-21	kworker/u16:2+flush-8:0	19:27:39	4
3736312	99	20	17,3	cyclictest	3707258	-21	kworker/u16:2+flush-8:0	19:12:28	4
3736320	99	19	14,4	cyclictest	32571	-21	latency_hist	22:52:11	7
3736320	99	18	13,4	cyclictest	226399	-21	latency_hist	00:12:11	7
3736320	99	18	12,5	cyclictest	165827	-21	latency_hist	23:47:11	7
3736320	99	17	11,5	cyclictest	286880	-21	latency_hist	00:37:11	7
3736320	99	17	0,16	cyclictest	4141292	-21	cat	22:17:11	7
3736320	99	17	0,15	cyclictest	3768592	-21	awk	19:17:43	7
3736312	99	17	15,2	cyclictest	3932646	-21	kworker/u16:0+flush-8:0	21:02:32	4
3736312	99	17	15,2	cyclictest	3818779	-21	kworker/u16:4+flush-8:0	20:07:07	4
3736320	99	16	9,6	cyclictest	0	-21	swapper/7	21:07:26	7
3736317	99	16	0,16	cyclictest	0	-21	swapper/6	21:47:47	6
3736320	99	15	8,6	cyclictest	0	-21	swapper/7	23:17:41	7
3736320	99	15	8,6	cyclictest	0	-21	swapper/7	22:57:44	7
3736320	99	15	8,6	cyclictest	0	-21	swapper/7	22:57:44	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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