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 Nov 27, 2025 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2288693	99	57	0,55	cyclictest	2807213	-21	latency_hist	19:38:11	7
2288113	2	57	21,31	sleep7	0	-21	swapper/7	15:20:22	7
2288689	99	45	43,2	cyclictest	2383078	-21	kworker/u16:2+flush-8:0	16:33:37	6
27655	89	43	0,37	rtkit-daemon	0	-21	swapper/5	15:18:19	5
2288693	99	41	0,39	cyclictest	2585258	-21	latency_hist	17:48:11	7
2288693	99	38	33,4	cyclictest	2615573	-21	latency_hist	18:03:11	7
2288684	99	38	36,2	cyclictest	2670723	-21	kworker/u16:4+flush-8:0	18:33:39	5
2288273	2	38	14,7	sleep4	0	-21	swapper/4	15:22:35	4
2288689	99	37	35,2	cyclictest	2534800	-21	kworker/u16:3+flush-8:0	17:31:48	6
2288684	99	37	35,2	cyclictest	2756676	-21	kworker/u16:0+events_unbound	19:31:48	5
2288684	99	37	35,2	cyclictest	2484111	-21	kworker/u16:5+events_unbound	17:25:45	5
2288680	99	37	35,2	cyclictest	2746495	-21	kworker/u16:3+flush-8:0	19:08:48	4
2288689	99	36	34,2	cyclictest	2756676	-21	kworker/u16:0+events_unbound	19:39:29	6
2288684	99	36	34,2	cyclictest	2484111	-21	kworker/u16:5+flush-8:0	17:08:11	5
2288684	99	36	34,2	cyclictest	2484111	-21	kworker/u16:5+flush-8:0	17:08:11	5
2288680	99	36	34,2	cyclictest	2685805	-21	kworker/u16:0+flush-8:0	18:48:35	4
2288150	2	36	26,7	sleep6	0	-21	swapper/6	15:20:53	6
2875616	2	35	0,1	chrt	0	-21	swapper/5	20:08:32	5
2875616	2	35	0,1	chrt	0	-21	swapper/5	20:08:32	5
2288693	99	35	34,0	cyclictest	0	-21	swapper/7	16:13:37	7
2288684	99	35	33,2	cyclictest	2625520	-21	kworker/u16:1+flush-8:0	18:14:48	5
2288684	99	35	33,2	cyclictest	2395299	-21	kworker/u16:3+flush-8:0	16:28:08	5
2288684	99	35	33,2	cyclictest	2395299	-21	kworker/u16:3+flush-8:0	16:28:08	5
2288680	99	35	33,2	cyclictest	2312493	-21	kworker/u16:3+events_unbound	15:33:36	4
2288693	99	34	29,4	cyclictest	2423709	-21	latency_hist	16:28:11	7
2288693	99	34	29,4	cyclictest	2423709	-21	latency_hist	16:28:11	7
2288684	99	34	32,2	cyclictest	2605231	-21	kworker/u16:0+events_unbound	18:08:11	5
2288680	99	34	32,2	cyclictest	2278047	-21	kworker/u16:2+flush-8:0	15:23:27	4
2288693	99	33	28,4	cyclictest	2463996	-21	latency_hist	16:48:12	7
2288689	99	33	31,2	cyclictest	2878347	-21	kworker/u16:3+events_unbound	20:14:12	6
2288684	99	33	31,2	cyclictest	2756676	-21	kworker/u16:0+flush-8:0	19:25:48	5
2288684	99	33	31,2	cyclictest	2756676	-21	kworker/u16:0+flush-8:0	19:25:48	5
2288684	99	33	31,2	cyclictest	2686493	-21	kworker/u16:1+events_unbound	18:56:43	5
2288684	99	33	31,2	cyclictest	2670723	-21	kworker/u16:4+flush-8:0	19:20:11	5
2288684	99	33	31,2	cyclictest	2430897	-21	kworker/u16:0+events_unbound	16:39:47	5
2288684	99	33	31,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:32:49	5
2288689	99	32	30,2	cyclictest	2917888	-21	kworker/u16:0+flush-8:0	20:32:52	6
2288689	99	32	30,2	cyclictest	2796844	-21	kworker/u16:3+events_unbound	19:30:16	6
2288689	99	32	30,2	cyclictest	2766846	-21	kworker/u16:2+flush-8:0	19:24:48	6
2288689	99	32	30,2	cyclictest	2766846	-21	kworker/u16:2+flush-8:0	19:24:48	6
2288689	99	32	30,2	cyclictest	2494497	-21	kworker/u16:4+events_unbound	17:08:41	6
2288689	99	32	30,2	cyclictest	2494497	-21	kworker/u16:4+events_unbound	17:08:41	6
2288684	99	32	30,2	cyclictest	2837068	-21	kworker/u16:2+events_unbound	20:27:20	5
2288684	99	32	30,2	cyclictest	2777037	-21	kworker/u16:1+events_unbound	19:44:49	5
2288684	99	32	30,2	cyclictest	2513638	-21	kworker/u16:1+events_unbound	17:33:39	5
2288684	99	32	30,2	cyclictest	2232145	-21	kworker/u16:0+events_unbound	15:25:29	5
2288693	99	31	29,1	cyclictest	0	-21	swapper/7	18:13:24	7
2288693	99	31	26,4	cyclictest	2676031	-21	latency_hist	18:33:11	7
2288693	99	31	26,4	cyclictest	2343006	-21	latency_hist	15:48:12	7
2288689	99	31	29,2	cyclictest	2777037	-21	kworker/u16:1+events_unbound	20:19:31	6
2288689	99	31	29,2	cyclictest	2777037	-21	kworker/u16:1+events_unbound	20:07:41	6
2288689	99	31	29,2	cyclictest	2670723	-21	kworker/u16:4+events_unbound	19:18:15	6
2288689	99	31	29,2	cyclictest	2655855	-21	kworker/u16:2+flush-8:0	18:27:56	6
2288689	99	31	29,2	cyclictest	2655855	-21	kworker/u16:2+events_unbound	18:45:40	6
2288689	99	31	29,2	cyclictest	2484111	-21	kworker/u16:5+events_unbound	17:56:37	6
2288689	99	31	29,2	cyclictest	2484111	-21	kworker/u16:5+events_unbound	17:56:37	6
2288689	99	31	29,2	cyclictest	2383078	-21	kworker/u16:2+flush-8:0	16:29:40	6
2288689	99	31	29,2	cyclictest	2383078	-21	kworker/u16:2+events_unbound	16:12:41	6
2288689	99	31	29,2	cyclictest	2363119	-21	kworker/u16:3+events_unbound	16:00:32	6
2288689	99	31	29,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:51:25	6
2288689	99	31	29,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:25:25	6
2288689	99	31	28,2	cyclictest	2837068	-21	kworker/u16:2+events_unbound	19:58:15	6
2288684	99	31	29,2	cyclictest	2937265	-21	kworker/u16:4+flush-8:0	20:49:47	5
2288684	99	31	29,2	cyclictest	2928679	-21	kworker/u16:3+events_unbound	20:41:49	5
2288684	99	31	29,2	cyclictest	2837424	-21	kworker/u16:4+events_unbound	19:57:20	5
2288684	99	31	29,2	cyclictest	2655855	-21	kworker/u16:2+events_unbound	18:25:27	5
2288684	99	31	29,2	cyclictest	2565147	-21	kworker/u16:0+events_unbound	17:47:48	5
2288684	99	31	29,2	cyclictest	2383078	-21	kworker/u16:2+events_unbound	16:16:47	5
2288684	99	31	29,2	cyclictest	2312493	-21	kworker/u16:3+events_unbound	15:42:49	5
2288684	99	31	29,2	cyclictest	2312493	-21	kworker/u16:3+events_unbound	15:42:49	5
2288684	99	31	29,2	cyclictest	2232145	-21	kworker/u16:0+events_unbound	16:09:49	5
2288680	99	31	29,2	cyclictest	2878347	-21	kworker/u16:3+flush-8:0	20:18:31	4
2288680	99	31	29,2	cyclictest	2756676	-21	kworker/u16:0+flush-8:0	19:13:35	4
2288680	99	31	29,2	cyclictest	2432826	-21	kworker/u16:1+events_unbound	16:43:26	4
2288680	99	31	29,2	cyclictest	2232145	-21	kworker/u16:0+events_unbound	16:13:24	4
2288689	99	30	28,2	cyclictest	2878347	-21	kworker/u16:3+events_unbound	20:25:24	6
2288689	99	30	28,2	cyclictest	2825361	-21	kworker/u16:3+events_unbound	19:44:12	6
2288689	99	30	28,2	cyclictest	2670723	-21	kworker/u16:4+events_unbound	18:55:48	6
2288689	99	30	28,2	cyclictest	2534662	-21	kworker/u16:2+flush-8:0	17:34:02	6
2288689	99	30	28,2	cyclictest	2383078	-21	kworker/u16:2+flush-8:0	16:15:20	6
2288689	99	30	28,2	cyclictest	2383078	-21	kworker/u16:2+events_unbound	16:46:53	6
2288684	99	30	28,2	cyclictest	2686493	-21	kworker/u16:1+flush-8:0	19:11:48	5
2288684	99	30	28,2	cyclictest	2670723	-21	kworker/u16:4+events_unbound	18:51:24	5
2288684	99	30	28,2	cyclictest	2655855	-21	kworker/u16:2+events_unbound	18:31:44	5
2288684	99	30	28,2	cyclictest	2605231	-21	kworker/u16:0+flush-8:0	17:58:36	5
2288684	99	30	28,2	cyclictest	2484111	-21	kworker/u16:5+events_unbound	17:00:32	5
2288684	99	30	28,2	cyclictest	2432826	-21	kworker/u16:1+events_unbound	16:36:32	5
2288684	99	30	28,2	cyclictest	2383078	-21	kworker/u16:2+events_unbound	16:06:36	5
2288684	99	30	28,2	cyclictest	2383007	-21	kworker/u16:1+flush-8:0	16:19:57	5
2288684	99	30	28,2	cyclictest	2322625	-21	kworker/u16:4+flush-8:0	15:52:28	5
2288680	99	30	28,2	cyclictest	2322625	-21	kworker/u16:4+flush-8:0	15:53:37	4
2288693	99	29	24,4	cyclictest	589235	-21	systemd-journal	20:43:10	7
2288689	99	29	27,2	cyclictest	2746331	-21	kworker/u16:2+flush-8:0	19:10:16	6
2288689	99	29	27,2	cyclictest	2605231	-21	kworker/u16:0+events_unbound	18:07:36	6
2288689	99	29	27,2	cyclictest	2395299	-21	kworker/u16:3+events_unbound	16:23:08	6
2288689	99	29	27,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:43:36	6
2288689	99	29	27,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:42:12	6
2288689	99	29	27,2	cyclictest	2297717	-21	kworker/u16:1+events_unbound	15:42:12	6
2288684	99	29	27,2	cyclictest	2917888	-21	kworker/u16:0+events_unbound	20:32:48	5
2288684	99	29	27,2	cyclictest	2878347	-21	kworker/u16:3+events_unbound	20:14:41	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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