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 Mar 01, 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
2326252	2	56	46,7	sleep5	0	-21	swapper/5	19:04:20	5
2325998	2	53	42,7	sleep6	0	-21	swapper/6	19:00:44	6
2326032	2	48	36,8	sleep4	0	-21	swapper/4	19:01:14	4
2326567	99	46	42,2	cyclictest	2335452	-21	kworker/u16:0+flush-8:0	19:24:44	4
2326263	2	46	12,30	sleep7	0	-21	swapper/7	19:04:30	7
2326567	99	45	43,2	cyclictest	2790782	-21	kworker/u16:3+flush-8:0	00:14:44	4
2326577	99	42	0,40	cyclictest	2327134	-21	latency_hist	19:09:45	7
2326567	99	41	39,2	cyclictest	2708684	-21	kworker/u16:2+events_unbound	23:39:43	4
2326577	99	38	0,36	cyclictest	2430600	-21	latency_hist	21:09:44	7
2326571	99	38	35,2	cyclictest	2298864	-21	kworker/u16:1+flush-8:0	19:29:44	5
2658921	2	37	0,0	sleep7	2658922	-21	rm	22:42:40	7
2326571	99	37	34,2	cyclictest	2708684	-21	kworker/u16:2+flush-8:0	23:44:43	5
2326571	99	36	34,2	cyclictest	2636241	-21	kworker/u16:4+flush-8:0	22:49:44	5
2326567	99	35	33,2	cyclictest	2708684	-21	kworker/u16:2+events_unbound	00:00:14	4
2326567	99	35	33,2	cyclictest	2364262	-21	kworker/u16:2+flush-8:0	20:49:44	4
2326577	99	34	33,0	cyclictest	0	-21	swapper/7	21:55:02	7
2326571	99	33	31,2	cyclictest	2408621	-21	kworker/u16:1+flush-8:0	21:10:13	5
2326567	99	32	30,2	cyclictest	2816650	-21	kworker/u16:4+events_unbound	00:30:06	4
2326567	99	32	30,2	cyclictest	2816650	-21	kworker/u16:4+events_unbound	00:30:06	4
2326571	99	31	28,2	cyclictest	2744841	-21	kworker/u16:0+flush-8:0	23:25:06	5
2326576	99	30	26,3	cyclictest	2587674	-21	kworker/u16:3+events_unbound	22:15:02	6
2326571	99	29	26,2	cyclictest	2326330	-21	kworker/u16:3+flush-8:0	21:35:02	5
2326567	99	29	27,2	cyclictest	2491307	-21	kworker/u16:2+events_unbound	22:10:05	4
2326577	99	28	23,4	cyclictest	2418543	-21	latency_hist	21:04:44	7
2326577	99	28	23,4	cyclictest	2418543	-21	latency_hist	21:04:44	7
2326571	99	28	27,1	cyclictest	2418184	-21	kworker/u16:4+events_unbound	21:08:51	5
2326571	99	28	26,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:04:39	5
2326567	99	27	25,2	cyclictest	2889348	-21	kworker/u16:0+flush-8:0	00:25:03	4
2326567	99	27	25,2	cyclictest	2889348	-21	kworker/u16:0+flush-8:0	00:25:03	4
2326567	99	27	24,3	cyclictest	2538342	-21	kworker/u16:5+flush-8:0	22:00:03	4
2326571	99	26	24,2	cyclictest	2491307	-21	kworker/u16:2+events_unbound	21:50:07	5
2326577	99	25	0,24	cyclictest	2635825	-21	latency_hist	22:34:44	7
2326571	99	25	23,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:05:06	5
2326571	99	25	23,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:05:06	5
2326571	99	25	23,2	cyclictest	2491307	-21	kworker/u16:2+flush-8:0	22:30:07	5
2326571	99	25	21,3	cyclictest	2864798	-21	updatedb	00:09:44	5
2326567	99	25	22,2	cyclictest	2538342	-21	kworker/u16:5+events_unbound	21:55:04	4
2326576	99	24	22,2	cyclictest	2636241	-21	kworker/u16:4+events_unbound	22:55:09	6
2326571	99	24	21,2	cyclictest	2298864	-21	kworker/u16:1+flush-8:0	20:04:45	5
2326567	99	24	22,2	cyclictest	2636241	-21	kworker/u16:4+events_unbound	23:10:04	4
2326567	99	24	21,2	cyclictest	2708684	-21	kworker/u16:2+flush-8:0	23:29:49	4
2326567	99	24	21,2	cyclictest	2326330	-21	kworker/u16:3+flush-8:0	21:10:02	4
2326576	99	23	21,2	cyclictest	2326330	-21	kworker/u16:3+events_unbound	21:39:59	6
2326571	99	23	21,2	cyclictest	2491307	-21	kworker/u16:2+flush-8:0	21:44:50	5
2326577	99	22	0,21	cyclictest	2623803	-21	cut	22:29:44	7
2326571	99	22	19,2	cyclictest	2335452	-21	kworker/u16:0+flush-8:0	19:46:15	5
2326571	99	22	17,2	cyclictest	2816650	-21	kworker/u16:4+events_unbound	00:25:05	5
2326571	99	22	17,2	cyclictest	2816650	-21	kworker/u16:4+events_unbound	00:25:05	5
2326567	99	22	19,2	cyclictest	2708684	-21	kworker/u16:2+flush-8:0	23:44:50	4
2326567	99	22	19,2	cyclictest	2708684	-21	kworker/u16:2+flush-8:0	23:44:50	4
2326567	99	22	19,2	cyclictest	2491307	-21	kworker/u16:2+events_unbound	21:35:04	4
2326577	99	21	21,0	cyclictest	0	-21	swapper/7	21:24:39	7
2326577	99	21	19,1	cyclictest	0	-21	swapper/7	21:50:05	7
2326571	99	20	18,2	cyclictest	2816650	-21	kworker/u16:4+events_unbound	00:24:38	5
2326571	99	20	18,2	cyclictest	2744841	-21	kworker/u16:0+events_unbound	23:30:06	5
2326571	99	20	18,2	cyclictest	2430640	-21	kworker/u16:0+flush-8:0	21:15:01	5
2326567	99	20	18,2	cyclictest	2636241	-21	kworker/u16:4+flush-8:0	22:50:09	4
2326567	99	20	18,2	cyclictest	2587674	-21	kworker/u16:3+events_unbound	22:40:18	4
2326567	99	20	18,2	cyclictest	2563475	-21	kworker/u16:1+events_unbound	23:40:00	4
2326567	99	20	18,2	cyclictest	2491307	-21	kworker/u16:2+events_unbound	22:30:06	4
2326567	99	20	18,2	cyclictest	2430640	-21	kworker/u16:0+events_unbound	22:05:00	4
2326567	99	20	18,2	cyclictest	2408621	-21	kworker/u16:1+events_unbound	21:15:14	4
2326567	99	20	16,3	cyclictest	2804540	-21	kworker/u16:0+flush-8:0	00:04:50	4
2326577	99	19	14,4	cyclictest	2599668	-21	latency_hist	22:19:44	7
2326577	99	19	0,17	cyclictest	1267	-21	snmpd	20:33:04	7
2326576	99	19	17,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:34:54	6
2326576	99	19	16,2	cyclictest	2587674	-21	kworker/u16:3+events_unbound	22:40:01	6
2326571	99	19	17,2	cyclictest	2430640	-21	kworker/u16:0+events_unbound	22:09:59	5
2326571	99	19	16,2	cyclictest	2386374	-21	kworker/u16:0+flush-8:0	20:39:44	5
2326567	99	19	17,2	cyclictest	2408621	-21	kworker/u16:1+flush-8:0	21:25:05	4
2326567	99	19	15,3	cyclictest	2364262	-21	kworker/u16:2+flush-8:0	20:10:11	4
2326577	99	18	17,0	cyclictest	0	-21	swapper/7	00:19:45	7
2326577	99	18	0,10	cyclictest	2503030	-21	rm	21:39:44	7
2326576	99	18	16,2	cyclictest	2708684	-21	kworker/u16:2+events_unbound	23:30:08	6
2326571	99	18	16,2	cyclictest	2587674	-21	kworker/u16:3+flush-8:0	22:24:39	5
2326571	99	18	16,2	cyclictest	2563475	-21	kworker/u16:1+events_unbound	22:25:13	5
2326571	99	18	16,2	cyclictest	2491307	-21	kworker/u16:2+events_unbound	22:05:06	5
2326571	99	18	15,2	cyclictest	2364262	-21	kworker/u16:2+flush-8:0	20:55:00	5
2326571	99	18	14,3	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	22:15:04	5
2326567	99	18	16,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:15:07	4
2326567	99	18	16,2	cyclictest	2326330	-21	kworker/u16:3+events_unbound	21:45:02	4
2326577	99	17	8,8	cyclictest	0	-21	swapper/7	21:25:05	7
2326571	99	17	15,2	cyclictest	2386374	-21	kworker/u16:0+flush-8:0	20:25:12	5
2326571	99	17	14,3	cyclictest	2364262	-21	kworker/u16:2+flush-8:0	20:15:46	5
2326571	99	17	14,2	cyclictest	2335452	-21	kworker/u16:0+flush-8:0	19:34:44	5
2326567	99	17	16,1	cyclictest	2744841	-21	kworker/u16:0+events_unbound	23:20:28	4
2326567	99	17	15,2	cyclictest	2563475	-21	kworker/u16:1+flush-8:0	23:50:13	4
2326567	99	17	15,2	cyclictest	2326330	-21	kworker/u16:3+events_unbound	19:25:08	4
2326577	99	16	8,7	cyclictest	0	-21	swapper/7	22:35:11	7
2326577	99	16	8,7	cyclictest	0	-21	swapper/7	21:10:02	7
2326577	99	16	7,8	cyclictest	0	-21	swapper/7	22:55:07	7
2326577	99	16	7,8	cyclictest	0	-21	swapper/7	22:20:02	7
2326577	99	16	7,7	cyclictest	0	-21	swapper/7	21:30:14	7
2326577	99	16	6,8	cyclictest	0	-21	swapper/7	23:30:02	7
2326577	99	16	14,1	cyclictest	2902961	-21	sh	00:25:00	7
2326577	99	16	14,1	cyclictest	2902961	-21	sh	00:25:00	7
2326577	99	16	13,2	cyclictest	0	-21	swapper/7	23:14:44	7
2326577	99	16	13,2	cyclictest	0	-21	swapper/7	20:54:44	7
2326577	99	16	13,2	cyclictest	0	-21	swapper/7	19:19:44	7
2326577	99	16	0,15	cyclictest	1267	-21	snmpd	23:26:48	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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