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 Jun 29, 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
3012835	2	99	0,0	sleep4	0	-21	swapper/4	11:39:34	4
2401049	2	57	47,7	sleep4	0	-21	swapper/4	07:08:42	4
2400908	2	56	46,7	sleep5	0	-21	swapper/5	07:06:42	5
2400968	2	54	20,29	sleep7	0	-21	swapper/7	07:07:32	7
2401398	99	52	44,7	cyclictest	2735362	-21	latency_hist	09:49:11	7
2401392	99	43	41,2	cyclictest	3078167	-21	kworker/u16:1+flush-8:0	12:14:41	5
2401393	99	42	39,3	cyclictest	2662012	-21	kworker/u16:3+flush-8:0	09:59:11	6
2401392	99	42	40,2	cyclictest	2870163	-21	kworker/u16:1+events_unbound	10:59:30	5
2401392	99	42	40,2	cyclictest	2793552	-21	kworker/u16:0+events_unbound	10:54:41	5
2401392	99	40	38,2	cyclictest	3078167	-21	kworker/u16:1+events_unbound	12:09:32	5
2401398	99	37	0,35	cyclictest	124	-21	kswapd0	11:24:11	7
2401392	99	37	35,2	cyclictest	3115123	-21	kworker/u16:2+flush-8:0	12:25:12	5
2401392	99	37	35,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:07:34	5
2401392	99	37	35,2	cyclictest	2808063	-21	kworker/u16:1+events_unbound	10:19:14	5
2401392	99	37	35,2	cyclictest	2662012	-21	kworker/u16:3+events_unbound	10:09:14	5
2401392	99	37	34,2	cyclictest	2710593	-21	kworker/u16:5+events_unbound	09:54:12	5
2401392	99	37	34,2	cyclictest	2662012	-21	kworker/u16:3+events_unbound	09:29:13	5
2401393	99	36	34,2	cyclictest	2662012	-21	kworker/u16:3+flush-8:0	10:14:32	6
2401393	99	36	33,2	cyclictest	2531042	-21	kworker/u16:1+flush-8:0	09:44:37	6
2401392	99	36	35,1	cyclictest	2843272	-21	kworker/u16:2+events_unbound	10:30:34	5
2401392	99	36	34,2	cyclictest	2793552	-21	kworker/u16:0+flush-8:0	10:24:37	5
2401392	99	36	34,2	cyclictest	2531042	-21	kworker/u16:1+events_unbound	10:00:38	5
2401392	99	35	33,2	cyclictest	3115123	-21	kworker/u16:2+events_unbound	12:34:05	5
2401392	99	35	33,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	11:28:29	5
2401392	99	35	33,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	11:12:41	5
2401392	99	35	33,2	cyclictest	2903408	-21	kworker/u16:2+events_unbound	11:39:45	5
2401392	99	35	33,2	cyclictest	2710593	-21	kworker/u16:5+events_unbound	10:35:20	5
2401392	99	35	33,2	cyclictest	2662012	-21	kworker/u16:3+events_unbound	09:50:21	5
2401392	99	35	33,2	cyclictest	2531042	-21	kworker/u16:1+events_unbound	09:45:22	5
2401393	99	34	32,2	cyclictest	2793552	-21	kworker/u16:0+flush-8:0	10:19:42	6
2401392	99	34	32,2	cyclictest	3002261	-21	kworker/u16:4+events_unbound	11:46:22	5
2401392	99	34	32,2	cyclictest	2953413	-21	kworker/u16:0+events_unbound	11:21:17	5
2401392	99	34	32,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:37:26	5
2401392	99	34	32,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:37:26	5
2401392	99	34	32,2	cyclictest	2793552	-21	kworker/u16:0+events_unbound	10:47:25	5
2401392	99	34	31,2	cyclictest	2953413	-21	kworker/u16:0+events_unbound	11:17:33	5
2401392	99	34	31,2	cyclictest	2953413	-21	kworker/u16:0+events_unbound	11:17:33	5
2640149	2	33	0,0	chrt	0	-21	swapper/4	09:09:31	4
2401392	99	33	31,2	cyclictest	3002261	-21	kworker/u16:4+events_unbound	11:35:12	5
2401392	99	33	31,2	cyclictest	2953413	-21	kworker/u16:0+events_unbound	11:33:01	5
2401392	99	33	31,2	cyclictest	2793552	-21	kworker/u16:0+events_unbound	10:41:53	5
2401392	99	33	31,2	cyclictest	2608504	-21	kworker/u16:0+events_unbound	09:11:22	5
2401392	99	33	31,2	cyclictest	2531042	-21	kworker/u16:1+events_unbound	09:40:21	5
2401392	99	32	30,2	cyclictest	2903409	-21	kworker/u16:3+flush-8:0	12:20:01	5
2401392	99	32	30,2	cyclictest	2903408	-21	kworker/u16:2+events_unbound	11:51:13	5
2401392	99	32	30,2	cyclictest	2870163	-21	kworker/u16:1+events_unbound	10:51:41	5
2401392	99	32	30,2	cyclictest	2808063	-21	kworker/u16:1+events_unbound	10:17:54	5
2401392	99	32	30,2	cyclictest	2608504	-21	kworker/u16:0+flush-8:0	09:19:31	5
2401387	99	32	30,1	cyclictest	1683352	-21	kworker/u16:2+events_unbound	07:14:26	4
2400882	2	32	21,8	sleep6	0	-21	swapper/6	07:06:19	6
2401398	99	31	26,4	cyclictest	2870122	-21	latency_hist	10:44:11	7
2401393	99	31	28,3	cyclictest	2531042	-21	kworker/u16:1+flush-8:0	09:39:37	6
2401392	99	31	29,2	cyclictest	3041865	-21	kworker/u16:0+events_unbound	11:57:17	5
2401392	99	31	29,2	cyclictest	3041865	-21	kworker/u16:0+events_unbound	11:57:17	5
2401392	99	31	29,2	cyclictest	2662012	-21	kworker/u16:3+flush-8:0	09:34:40	5
2401392	99	31	29,2	cyclictest	2598811	-21	kworker/u16:2+events_unbound	09:28:22	5
2401392	99	30	28,2	cyclictest	2662012	-21	kworker/u16:3+flush-8:0	10:04:49	5
2401398	99	29	28,0	cyclictest	0	-21	swapper/7	12:09:24	7
2401392	99	29	27,2	cyclictest	2919109	-21	kworker/u16:4+flush-8:0	11:04:31	5
2401392	99	29	27,2	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:01:33	5
2401392	99	29	27,2	cyclictest	2598811	-21	kworker/u16:2+events_unbound	09:17:29	5
2783230	2	28	0,1	chrt	2783231	-21	sh	10:07:05	7
2401398	99	27	22,4	cyclictest	2472664	-21	latency_hist	07:44:11	7
2401393	99	27	25,2	cyclictest	2559774	-21	kworker/u16:3+events_unbound	08:34:41	6
2401392	99	26	24,2	cyclictest	2463026	-21	kworker/u16:0+events_unbound	07:53:21	5
2401393	99	25	23,2	cyclictest	2903408	-21	kworker/u16:2+flush-8:0	11:19:11	6
2401393	99	25	23,2	cyclictest	2903408	-21	kworker/u16:2+flush-8:0	11:19:11	6
2401393	99	25	21,3	cyclictest	2903408	-21	kworker/u16:2+flush-8:0	11:54:11	6
2401392	99	25	23,2	cyclictest	2531042	-21	kworker/u16:1+events_unbound	08:26:21	5
2401392	99	25	23,2	cyclictest	2482453	-21	kworker/u16:2+events_unbound	08:37:21	5
2401398	99	24	19,4	cyclictest	2661585	-21	latency_hist	09:19:11	7
2401398	99	23	18,4	cyclictest	650	-21	systemd-journal	11:39:06	7
2401398	99	23	0,21	cyclictest	2686232	-21	latency_hist	09:29:11	7
2401392	99	23	21,2	cyclictest	2463026	-21	kworker/u16:0+events_unbound	08:01:22	5
2401392	99	23	20,2	cyclictest	2401097	-21	kworker/u16:1+events_unbound	07:29:21	5
2855410	2	22	0,1	sleep7	2855408	-21	grep	10:34:46	7
2401392	99	22	20,2	cyclictest	2531042	-21	kworker/u16:1+events_unbound	08:47:21	5
2401392	99	22	20,2	cyclictest	2401097	-21	kworker/u16:1+flush-8:0	07:19:07	5
2401393	99	21	19,2	cyclictest	2317258	-21	kworker/u16:3+flush-8:0	07:44:36	6
2401393	99	21	19,2	cyclictest	2317258	-21	kworker/u16:3+flush-8:0	07:44:36	6
2401392	99	21	19,2	cyclictest	2463026	-21	kworker/u16:0+events_unbound	08:31:22	5
2401392	99	21	19,2	cyclictest	2317258	-21	kworker/u16:3+events_unbound	07:44:41	5
2401392	99	21	19,2	cyclictest	2317258	-21	kworker/u16:3+events_unbound	07:44:41	5
2401393	99	20	18,2	cyclictest	2903409	-21	kworker/u16:3+flush-8:0	11:14:06	6
2401392	99	20	18,2	cyclictest	2463026	-21	kworker/u16:0+events_unbound	08:12:22	5
2401392	99	20	18,2	cyclictest	2317258	-21	kworker/u16:3+events_unbound	08:08:22	5
2802296	2	19	0,0	sleep7	2802298	-21	kthreadcore	10:14:34	7
2401387	99	19	18,1	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:38:41	4
2401387	99	19	18,1	cyclictest	2903409	-21	kworker/u16:3+events_unbound	12:38:41	4
2401398	99	18	15,2	cyclictest	2649446	-21	idleruntime-cro	09:14:11	7
2401398	99	18	13,4	cyclictest	2759859	-21	latency_hist	09:59:11	7
2401398	99	18	13,4	cyclictest	2747572	-21	latency_hist	09:54:11	7
2401393	99	18	0,1	cyclictest	0	-21	swapper/6	09:10:27	6
2401392	99	18	16,2	cyclictest	2482453	-21	kworker/u16:2+events_unbound	08:21:22	5
2401393	99	17	15,2	cyclictest	2401097	-21	kworker/u16:1+flush-8:0	07:24:12	6
2401393	99	17	15,2	cyclictest	2317258	-21	kworker/u16:3+events_unbound	08:04:24	6
2401392	99	17	16,1	cyclictest	2578725	-21	kworker/u16:4+events_unbound	09:05:53	5
2401398	99	16	12,3	cyclictest	1278	-21	snmpd	09:08:27	7
2401393	99	16	14,2	cyclictest	2710593	-21	kworker/u16:5+flush-8:0	10:34:29	6
2401392	99	16	14,2	cyclictest	2444038	-21	kworker/u16:2+events_unbound	07:35:22	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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