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 Wed Dec 24, 2025 12:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2489921	2	65	54,8	sleep5	0	-21	swapper/5	07:08:33	5
2489824	2	57	47,7	sleep4	0	-21	swapper/4	07:07:11	4
2490251	99	45	41,3	cyclictest	2707075	-21	fwupd	08:59:05	6
2489684	2	42	32,7	sleep6	0	-21	swapper/6	07:05:13	6
2490255	99	39	33,5	cyclictest	2980557	-21	latency_hist	11:19:11	7
2488955	2	39	3,31	sleep7	0	-21	swapper/7	07:04:42	7
2490255	99	38	35,2	cyclictest	2853918	-21	cat	10:14:11	7
2490255	99	36	30,5	cyclictest	2804845	-21	latency_hist	09:49:11	7
2490250	99	32	29,2	cyclictest	2610417	-21	kworker/u16:2+events_unbound	08:09:14	5
2490255	99	31	30,0	cyclictest	0	-21	swapper/7	09:04:07	7
2490250	99	31	26,4	cyclictest	2707070	-21	packagekitd	08:59:05	5
2490251	99	30	28,2	cyclictest	2951275	-21	kworker/u16:0+events_unbound	11:33:10	6
2490251	99	30	28,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	08:24:37	6
2490251	99	29	27,2	cyclictest	2706983	-21	kworker/u16:0+events_unbound	09:10:21	6
2490251	99	28	26,2	cyclictest	2951276	-21	kworker/u16:4+events_unbound	12:23:10	6
2490251	99	28	26,2	cyclictest	2951275	-21	kworker/u16:0+events_unbound	12:34:09	6
2490251	99	28	26,2	cyclictest	2882795	-21	kworker/u16:2+events_unbound	10:30:26	6
2490251	99	28	26,2	cyclictest	2745984	-21	kworker/u16:5+events_unbound	09:43:09	6
2490251	99	28	26,2	cyclictest	2678116	-21	kworker/u16:3+events_unbound	08:50:38	6
2490251	99	28	26,2	cyclictest	2678116	-21	kworker/u16:3+events_unbound	08:50:38	6
2490251	99	28	26,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:10:42	6
2490251	99	28	26,2	cyclictest	2562256	-21	kworker/u16:0+events_unbound	08:03:46	6
2490250	99	28	26,2	cyclictest	2706983	-21	kworker/u16:0+events_unbound	09:11:23	5
2490250	99	28	26,2	cyclictest	2541548	-21	kworker/u16:4+events_unbound	07:35:22	5
2490245	99	28	26,2	cyclictest	2951275	-21	kworker/u16:0+events_unbound	11:28:35	4
2490245	99	28	26,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	08:09:11	4
2490255	99	27	22,4	cyclictest	650	-21	systemd-journal	07:39:12	7
2490255	99	27	21,5	cyclictest	2513390	-21	latency_hist	07:19:12	7
2490255	99	27	21,5	cyclictest	2513390	-21	latency_hist	07:19:12	7
2490251	99	27	25,2	cyclictest	2951276	-21	kworker/u16:4+flush-8:0	11:43:09	6
2490251	99	27	25,2	cyclictest	2951276	-21	kworker/u16:4+events_unbound	11:56:53	6
2490251	99	27	25,2	cyclictest	2863732	-21	kworker/u16:0+events_unbound	10:48:07	6
2490251	99	27	25,2	cyclictest	2805234	-21	kworker/u16:2+events_unbound	09:50:34	6
2490251	99	27	25,2	cyclictest	2659020	-21	kworker/u16:2+events_unbound	08:47:50	6
2490255	99	26	23,2	cyclictest	3000166	-21	wc	11:29:11	7
2490251	99	26	24,2	cyclictest	2991509	-21	kworker/u16:2+events_unbound	11:27:09	6
2490251	99	26	24,2	cyclictest	2951276	-21	kworker/u16:4+events_unbound	11:48:42	6
2490251	99	26	24,2	cyclictest	2863732	-21	kworker/u16:0+events_unbound	10:22:35	6
2490251	99	26	24,2	cyclictest	2745918	-21	kworker/u16:4+flush-8:0	09:39:05	6
2490251	99	26	24,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	09:02:47	6
2490250	99	26	24,2	cyclictest	3029518	-21	kworker/u16:2+flush-8:0	11:44:41	5
2490250	99	26	24,2	cyclictest	2706983	-21	kworker/u16:0+events_unbound	09:05:39	5
2490250	99	26	24,2	cyclictest	2659020	-21	kworker/u16:2+flush-8:0	08:49:21	5
2490250	99	26	24,2	cyclictest	2659020	-21	kworker/u16:2+flush-8:0	08:49:21	5
2490245	99	26	24,2	cyclictest	2951276	-21	kworker/u16:4+flush-8:0	11:09:34	4
2490245	99	26	24,2	cyclictest	2951276	-21	kworker/u16:4+flush-8:0	11:09:34	4
2490255	99	25	24,0	cyclictest	0	-21	swapper/7	08:09:33	7
2490255	99	25	23,1	cyclictest	0	-21	swapper/7	12:09:32	7
2490255	99	25	0,23	cyclictest	3106471	-21	latency_hist	12:24:11	7
2490251	99	25	23,2	cyclictest	3029518	-21	kworker/u16:2+events_unbound	12:02:29	6
2490251	99	25	23,2	cyclictest	2882795	-21	kworker/u16:2+events_unbound	10:59:02	6
2490251	99	25	23,2	cyclictest	2863732	-21	kworker/u16:0+events_unbound	10:52:57	6
2490251	99	25	23,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	11:17:09	6
2490251	99	25	23,2	cyclictest	2552574	-21	kworker/u16:1+events_unbound	07:51:31	6
2490251	99	25	23,2	cyclictest	2541548	-21	kworker/u16:4+events_unbound	07:57:07	6
2490251	99	25	23,2	cyclictest	2513423	-21	kworker/u16:1+events_unbound	07:21:26	6
2490251	99	25	23,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	07:14:14	6
2490251	99	25	23,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	07:14:14	6
2490251	99	25	22,2	cyclictest	2745918	-21	kworker/u16:4+events_unbound	10:04:15	6
2490250	99	25	23,2	cyclictest	2541548	-21	kworker/u16:4+events_unbound	07:52:22	5
2490245	99	25	22,2	cyclictest	2745918	-21	kworker/u16:4+events_unbound	09:54:29	4
2490245	99	25	22,2	cyclictest	2639670	-21	kworker/u16:1+flush-8:0	08:30:06	4
2490245	99	25	22,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:34:25	4
2490251	99	24	22,2	cyclictest	3097188	-21	kworker/u16:1+events_unbound	12:38:54	6
2490251	99	24	22,2	cyclictest	2951275	-21	kworker/u16:0+events_unbound	12:05:58	6
2490251	99	24	22,2	cyclictest	2951275	-21	kworker/u16:0+events_unbound	11:51:46	6
2490251	99	24	22,2	cyclictest	2745918	-21	kworker/u16:4+flush-8:0	09:48:34	6
2490251	99	24	22,2	cyclictest	2745918	-21	kworker/u16:4+events_unbound	10:17:34	6
2490251	99	24	22,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	09:56:14	6
2490251	99	24	22,2	cyclictest	2610417	-21	kworker/u16:2+events_unbound	08:20:33	6
2490251	99	24	22,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	08:18:14	6
2490251	99	24	22,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	07:31:59	6
2490251	99	24	22,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	07:28:47	6
2490250	99	24	22,2	cyclictest	2951276	-21	kworker/u16:4+flush-8:0	12:14:33	5
2490250	99	24	22,2	cyclictest	2678116	-21	kworker/u16:3+flush-8:0	09:04:11	5
2490250	99	24	22,2	cyclictest	2659020	-21	kworker/u16:2+flush-8:0	09:15:52	5
2490251	99	23	21,2	cyclictest	2951276	-21	kworker/u16:4+events_unbound	11:37:54	6
2490251	99	23	21,2	cyclictest	2745984	-21	kworker/u16:5+flush-8:0	09:17:02	6
2490251	99	23	21,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:40:30	6
2490251	99	23	21,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:39:02	6
2490251	99	23	21,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	09:23:38	6
2490251	99	23	21,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	08:36:42	6
2490251	99	23	21,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	08:10:33	6
2490251	99	23	21,2	cyclictest	1805809	-21	kworker/u16:3+events_unbound	08:07:11	6
2490250	99	23	21,2	cyclictest	2882795	-21	kworker/u16:2+events_unbound	10:30:22	5
2490250	99	23	21,2	cyclictest	2863732	-21	kworker/u16:0+events_unbound	10:46:38	5
2490250	99	23	20,2	cyclictest	2745918	-21	kworker/u16:4+flush-8:0	10:09:22	5
2490245	99	23	21,2	cyclictest	3097188	-21	kworker/u16:1+events_unbound	12:34:40	4
2490245	99	23	20,2	cyclictest	2639670	-21	kworker/u16:1+flush-8:0	11:19:28	4
2490255	99	22	17,4	cyclictest	2707187	-21	latency_hist	08:59:12	7
2490251	99	22	20,2	cyclictest	2951276	-21	kworker/u16:4+events_unbound	12:12:45	6
2490251	99	22	20,2	cyclictest	2931961	-21	kworker/u16:3+flush-8:0	11:01:41	6
2490251	99	22	20,2	cyclictest	2706983	-21	kworker/u16:0+events_unbound	09:04:50	6
2490251	99	22	20,2	cyclictest	2552574	-21	kworker/u16:1+events_unbound	07:41:06	6
2490250	99	22	20,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:04:33	5
2490250	99	22	20,2	cyclictest	2471664	-21	kworker/u16:0+flush-8:0	07:19:11	5
2490250	99	22	20,2	cyclictest	2471664	-21	kworker/u16:0+flush-8:0	07:19:11	5
2490245	99	22	20,2	cyclictest	2639670	-21	kworker/u16:1+events_unbound	10:09:26	4
2490245	99	22	19,3	cyclictest	2882795	-21	kworker/u16:2+flush-8:0	10:29:40	4
2490245	99	22	18,3	cyclictest	1805809	-21	kworker/u16:3+flush-8:0	08:14:30	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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