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 Mar 02, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2059620	2	58	48,7	sleep5	0	-21	swapper/5	07:02:34	5
2059612	2	58	48,7	sleep6	0	-21	swapper/6	07:02:27	6
2060049	99	52	48,3	cyclictest	2326702	-21	kworker/u16:4+flush-8:0	09:44:56	4
2060049	99	52	48,3	cyclictest	2326702	-21	kworker/u16:4+flush-8:0	09:44:56	4
2060049	99	49	46,2	cyclictest	2761986	-21	kworker/u16:3+flush-8:0	12:19:38	4
2060055	99	47	45,2	cyclictest	2485533	-21	kworker/u16:2+flush-8:0	10:59:38	5
2060049	99	47	45,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	11:29:38	4
2060049	99	46	44,2	cyclictest	2226407	-21	kworker/u16:2+flush-8:0	09:14:38	4
2060049	99	46	43,2	cyclictest	2545603	-21	kworker/u16:3+flush-8:0	10:54:56	4
2059543	2	46	36,7	sleep4	0	-21	swapper/4	07:01:28	4
2060055	99	44	41,2	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	08:49:38	5
2060049	99	43	39,3	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	08:09:56	4
2060049	99	40	38,2	cyclictest	2178535	-21	kworker/u16:4+flush-8:0	08:24:33	4
2059472	2	40	3,31	sleep7	0	-21	swapper/7	07:00:27	7
2060049	99	39	37,2	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	08:44:38	4
2060059	99	38	35,2	cyclictest	2226407	-21	kworker/u16:2+flush-8:0	09:39:33	6
2060055	99	37	33,3	cyclictest	2485533	-21	kworker/u16:2+flush-8:0	11:24:44	5
2060059	99	36	34,2	cyclictest	2424620	-21	kworker/u16:3+flush-8:0	10:35:14	6
2060055	99	36	33,2	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	08:25:04	5
2060049	99	36	34,2	cyclictest	2424620	-21	kworker/u16:3+flush-8:0	10:39:38	4
2060055	99	35	33,2	cyclictest	2761986	-21	kworker/u16:3+flush-8:0	12:20:12	5
2060055	99	35	33,2	cyclictest	2628461	-21	kworker/u16:0+events_unbound	11:31:58	5
2060049	99	35	32,2	cyclictest	2687038	-21	kworker/u16:4+flush-8:0	11:49:55	4
2060049	99	35	32,2	cyclictest	2687038	-21	kworker/u16:4+flush-8:0	11:49:55	4
2060049	99	35	31,3	cyclictest	2031196	-21	kworker/u16:5+flush-8:0	07:45:04	4
2060059	99	34	31,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	10:25:00	6
2060049	99	34	32,2	cyclictest	2675630	-21	kworker/u16:2+flush-8:0	11:45:09	4
2060060	99	33	27,5	cyclictest	2328940	-21	latency_hist	09:19:38	7
2060055	99	33	31,2	cyclictest	2351700	-21	kworker/u16:1+flush-8:0	09:34:33	5
2060059	99	32	28,3	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	08:10:04	6
2060049	99	32	30,2	cyclictest	2687038	-21	kworker/u16:4+flush-8:0	12:09:55	4
2060055	99	31	29,2	cyclictest	2485533	-21	kworker/u16:2+flush-8:0	11:24:38	5
2060049	99	31	27,3	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	08:05:06	4
2060060	99	30	24,5	cyclictest	2273794	-21	latency_hist	08:54:39	7
2060055	99	30	28,2	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	08:14:54	5
2060055	99	30	27,2	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	09:09:39	5
2060049	99	30	27,2	cyclictest	2092736	-21	kworker/u16:0+events_unbound	07:24:53	4
2060059	99	29	27,2	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	09:10:21	6
2060049	99	29	27,2	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	07:59:34	4
2060060	99	28	23,4	cyclictest	2226024	-21	latency_hist	08:29:38	7
2060055	99	28	26,2	cyclictest	2569808	-21	kworker/u16:4+flush-8:0	11:09:37	5
2060049	99	28	26,2	cyclictest	2226407	-21	kworker/u16:2+flush-8:0	08:34:33	4
2060049	99	27	25,2	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	07:50:09	4
2060055	99	26	25,1	cyclictest	2735794	-21	kworker/u16:0+events_unbound	12:15:46	5
2060049	99	26	24,2	cyclictest	2485533	-21	kworker/u16:2+flush-8:0	11:24:33	4
2060060	99	25	1,23	cyclictest	2640359	-21	ssh	11:26:49	7
2060059	99	25	22,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	09:49:43	6
2060055	99	25	23,2	cyclictest	2747825	-21	kworker/u16:1+flush-8:0	12:29:32	5
2060055	99	25	23,2	cyclictest	2159236	-21	kworker/u16:2+flush-8:0	08:00:04	5
2060049	99	25	23,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	10:39:53	4
2060049	99	25	23,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	09:59:33	4
2718934	2	24	0,1	chrt	2718935	-21	kthreadcore	11:59:59	7
2060060	99	23	17,5	cyclictest	2449371	-21	latency_hist	10:09:38	7
2060059	99	23	20,3	cyclictest	2545603	-21	kworker/u16:3+flush-8:0	10:54:33	6
2060055	99	23	20,2	cyclictest	2424620	-21	kworker/u16:3+flush-8:0	10:34:44	5
2060049	99	23	21,2	cyclictest	2761986	-21	kworker/u16:3+events_unbound	12:19:56	4
2060049	99	23	20,2	cyclictest	2761986	-21	kworker/u16:3+flush-8:0	12:24:49	4
2060049	99	23	20,2	cyclictest	2399578	-21	kworker/u16:1+events_unbound	10:44:40	4
2186109	2	22	0,1	sleep6	0	-21	swapper/6	08:05:00	6
2060059	99	22	18,3	cyclictest	2640166	-21	packagekitd	11:26:53	6
2060055	99	22	19,2	cyclictest	2424620	-21	kworker/u16:3+events_unbound	10:14:52	5
2060049	99	22	20,2	cyclictest	2437386	-21	kworker/u16:0+events_unbound	10:10:09	4
2060049	99	22	19,2	cyclictest	2616234	-21	kworker/u16:3+events_unbound	12:04:40	4
2060049	99	21	19,2	cyclictest	2616234	-21	kworker/u16:3+events_unbound	11:55:09	4
2060049	99	21	19,2	cyclictest	2603285	-21	kworker/u16:0+events_unbound	11:10:12	4
2060049	99	21	19,2	cyclictest	2603285	-21	kworker/u16:0+events_unbound	11:10:12	4
2060049	99	21	19,2	cyclictest	2437386	-21	kworker/u16:0+events_unbound	10:05:45	4
2060060	99	20	14,5	cyclictest	2473478	-21	latency_hist	10:19:38	7
2060059	99	20	18,2	cyclictest	2226407	-21	kworker/u16:2+flush-8:0	09:55:21	6
2060055	99	20	19,1	cyclictest	2437386	-21	kworker/u16:0+events_unbound	10:19:53	5
2060060	99	19	0,18	cyclictest	2110514	-21	ntpq	07:25:04	7
2060059	99	19	17,2	cyclictest	2399578	-21	kworker/u16:1+flush-8:0	10:04:38	6
2060059	99	19	17,2	cyclictest	2399578	-21	kworker/u16:1+events_unbound	10:14:27	6
2060055	99	19	17,2	cyclictest	2687038	-21	kworker/u16:4+flush-8:0	11:55:19	5
2060055	99	19	17,2	cyclictest	2111821	-21	kworker/u16:2+flush-8:0	07:30:05	5
2060055	99	19	17,2	cyclictest	2092736	-21	kworker/u16:0+flush-8:0	07:49:57	5
2060049	99	19	17,2	cyclictest	2399578	-21	kworker/u16:1+events_unbound	10:00:05	4
2060049	99	19	17,2	cyclictest	2399578	-21	kworker/u16:1+events_unbound	09:49:53	4
2060049	99	19	16,2	cyclictest	2616234	-21	kworker/u16:3+flush-8:0	11:39:44	4
2060060	99	18	13,4	cyclictest	2178349	-21	latency_hist	08:04:39	7
2060060	99	18	12,5	cyclictest	2786095	-21	latency_hist	12:29:37	7
2060060	99	18	11,6	cyclictest	0	-21	swapper/7	12:05:04	7
2060055	99	18	16,2	cyclictest	2675630	-21	kworker/u16:2+events_unbound	12:10:10	5
2060055	99	18	15,2	cyclictest	2437386	-21	kworker/u16:0+flush-8:0	10:09:48	5
2060049	99	18	16,2	cyclictest	2178535	-21	kworker/u16:4+events_unbound	08:44:52	4
2060060	99	17	14,2	cyclictest	0	-21	swapper/7	12:19:38	7
2060060	99	17	13,3	cyclictest	1267	-21	snmpd	10:53:09	7
2060060	99	17	12,4	cyclictest	2092351	-21	latency_hist	07:19:39	7
2060059	99	17	14,3	cyclictest	2006710	-21	kworker/u16:1+flush-8:0	08:55:04	6
2060055	99	17	14,2	cyclictest	2675630	-21	kworker/u16:2+flush-8:0	12:05:21	5
2060055	99	17	14,2	cyclictest	2616234	-21	kworker/u16:3+flush-8:0	11:35:00	5
2060049	99	17	15,2	cyclictest	2424620	-21	kworker/u16:3+flush-8:0	10:25:37	4
2060049	99	17	15,2	cyclictest	2424620	-21	kworker/u16:3+flush-8:0	10:20:07	4
2060049	99	17	15,2	cyclictest	2326702	-21	kworker/u16:4+events_unbound	09:43:44	4
2060049	99	17	15,2	cyclictest	2226407	-21	kworker/u16:2+flush-8:0	08:59:38	4
2060060	99	16	9,6	cyclictest	0	-21	swapper/7	10:35:04	7
2060060	99	16	8,7	cyclictest	0	-21	swapper/7	09:08:48	7
2060060	99	16	8,7	cyclictest	0	-21	swapper/7	09:08:48	7
2060060	99	16	12,3	cyclictest	1267	-21	snmpd	08:42:45	7
2060060	99	16	0,15	cyclictest	2666020	-21	latency_hist	11:39:38	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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