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 Jan 19, 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
2566721	2	111	0,0	sleep6	0	-21	swapper/6	20:42:44	6
2883683	2	97	0,1	sleep7	0	-21	swapper/7	22:57:48	7
2377899	99	65	58,6	cyclictest	2856850	-21	latency_hist	22:47:27	7
2377898	99	60	58,2	cyclictest	3025358	-21	kworker/u16:1+events_unbound	00:12:27	6
2368374	2	60	48,8	sleep5	0	-21	swapper/5	19:02:36	5
2377899	99	50	45,4	cyclictest	2759711	-21	latency_hist	22:07:27	7
2368373	2	50	39,7	sleep4	0	-21	swapper/4	19:02:35	4
2377889	99	49	46,2	cyclictest	2881081	-21	kworker/u16:3+flush-8:0	23:47:27	4
2377889	99	47	45,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	21:56:38	4
2377889	99	45	43,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	22:41:27	4
2939825	2	44	0,0	sleep7	2939823	-21	sshd-session	23:18:40	7
2377898	99	44	41,2	cyclictest	2348799	-21	kworker/u16:0+flush-8:0	19:52:28	6
2377899	99	43	35,7	cyclictest	3123769	-21	latency_hist	00:37:27	7
2377890	99	42	40,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	22:55:26	5
2377890	99	42	40,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	22:55:26	5
2377889	99	42	40,2	cyclictest	3085996	-21	kworker/u16:0+events_unbound	00:29:14	4
2377889	99	42	40,2	cyclictest	2963964	-21	kworker/u16:1+flush-8:0	23:42:22	4
2377889	99	42	40,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:23:58	4
2377890	99	41	39,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	21:49:42	5
2377898	99	40	37,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	21:52:30	6
2377889	99	40	38,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:13:59	4
2377889	99	40	38,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	22:04:27	4
2377889	99	40	38,2	cyclictest	2635962	-21	kworker/u16:0+events_unbound	21:59:38	4
2377889	99	40	37,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:32:30	4
2377889	99	40	37,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:32:30	4
2377352	2	40	5,31	sleep7	0	-21	swapper/7	19:03:58	7
2377890	99	39	37,2	cyclictest	3085996	-21	kworker/u16:0+events_unbound	00:21:50	5
2377890	99	39	37,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:40:46	5
2377890	99	39	37,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	00:25:19	5
2377890	99	39	37,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:40:11	5
2377890	99	39	37,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:35:47	5
2377890	99	39	37,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	22:01:39	5
2377890	99	39	37,2	cyclictest	2635962	-21	kworker/u16:0+events_unbound	22:18:47	5
2377890	99	39	37,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:18:10	5
2377889	99	39	37,2	cyclictest	2963964	-21	kworker/u16:1+events_unbound	23:32:30	4
2377889	99	39	37,2	cyclictest	2963964	-21	kworker/u16:1+events_unbound	23:32:30	4
2377889	99	39	37,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:45:26	4
2377890	99	38	36,2	cyclictest	3002840	-21	kworker/u16:4+events_unbound	23:49:26	5
2377890	99	38	36,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:28:41	5
2377890	99	38	36,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:01:41	5
2377890	99	38	36,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	22:51:15	5
2377890	99	38	36,2	cyclictest	2765760	-21	kworker/u16:3+events_unbound	22:25:51	5
2377890	99	38	36,2	cyclictest	2734284	-21	kworker/u16:4+events_unbound	22:32:10	5
2377890	99	38	36,2	cyclictest	2635962	-21	kworker/u16:0+events_unbound	22:04:06	5
2377890	99	38	36,2	cyclictest	2439899	-21	kworker/u16:1+events_unbound	21:33:03	5
2377890	99	38	36,2	cyclictest	2439899	-21	kworker/u16:1+events_unbound	21:33:03	5
2377890	99	38	35,3	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:00:54	5
2377889	99	38	36,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:56:18	4
2377889	99	38	36,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:56:18	4
2377898	99	37	35,2	cyclictest	2881081	-21	kworker/u16:3+flush-8:0	23:17:23	6
2377898	99	37	35,2	cyclictest	2439899	-21	kworker/u16:1+flush-8:0	20:57:27	6
2377898	99	37	34,2	cyclictest	2734284	-21	kworker/u16:4+events_unbound	22:27:29	6
2377890	99	37	35,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:31:54	5
2377890	99	37	35,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:33:38	5
2377890	99	37	35,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:33:38	5
2377890	99	37	35,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:16:10	5
2377890	99	37	35,2	cyclictest	2635962	-21	kworker/u16:0+events_unbound	21:43:31	5
2377889	99	37	35,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:00:58	4
2377898	99	36	34,2	cyclictest	2765760	-21	kworker/u16:3+events_unbound	22:19:14	6
2377890	99	36	34,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:35:02	5
2377890	99	36	34,2	cyclictest	3025358	-21	kworker/u16:1+events_unbound	00:04:42	5
2377890	99	36	34,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:05:10	5
2377890	99	36	34,2	cyclictest	2734284	-21	kworker/u16:4+events_unbound	22:14:06	5
2377890	99	36	34,2	cyclictest	2710333	-21	kworker/u16:1+events_unbound	21:56:50	5
2377890	99	36	34,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:23:25	5
2377898	99	35	34,1	cyclictest	2765760	-21	kworker/u16:3+events_unbound	22:42:30	6
2377898	99	35	33,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	23:58:29	6
2377898	99	35	33,2	cyclictest	2684708	-21	kworker/u16:3+events_unbound	21:47:58	6
2377890	99	35	33,2	cyclictest	3002840	-21	kworker/u16:4+events_unbound	23:53:09	5
2377890	99	35	33,2	cyclictest	2999056	-21	kworker/u16:2+events_unbound	23:43:46	5
2377890	99	35	33,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:21:06	5
2377890	99	35	33,2	cyclictest	2635962	-21	kworker/u16:0+flush-8:0	21:27:38	5
2377890	99	35	33,2	cyclictest	2635962	-21	kworker/u16:0+events_unbound	22:11:10	5
2377890	99	35	33,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:15:10	5
2377889	99	35	33,2	cyclictest	2963964	-21	kworker/u16:1+events_unbound	23:29:10	4
2377889	99	35	33,2	cyclictest	2893669	-21	kworker/u16:4+events_unbound	23:06:38	4
2377889	99	35	33,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:08:02	4
2377889	99	35	33,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:18:47	4
2377899	99	34	29,4	cyclictest	2990266	-21	latency_hist	23:42:27	7
2377898	99	34	32,2	cyclictest	2439899	-21	kworker/u16:1+flush-8:0	21:12:23	6
2377890	99	34	32,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:10:19	5
2377890	99	34	31,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:07:37	5
2377889	99	34	32,2	cyclictest	3025358	-21	kworker/u16:1+events_unbound	00:01:41	4
2377889	99	34	32,2	cyclictest	2881081	-21	kworker/u16:3+events_unbound	23:17:25	4
2377889	99	34	32,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	22:50:29	4
2377889	99	34	32,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:30:46	4
2377889	99	34	32,2	cyclictest	2765760	-21	kworker/u16:3+events_unbound	22:24:37	4
2377889	99	34	32,2	cyclictest	2439899	-21	kworker/u16:1+events_unbound	21:23:58	4
2377898	99	33	31,2	cyclictest	2805110	-21	kworker/u16:2+events_unbound	23:26:38	6
2377890	99	33	31,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:08:49	5
2377890	99	33	31,2	cyclictest	2927536	-21	kworker/u16:0+events_unbound	23:25:06	5
2377890	99	33	31,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:40:15	5
2377890	99	33	30,2	cyclictest	2526805	-21	kworker/u16:4+flush-8:0	21:02:37	5
2377889	99	33	31,2	cyclictest	3027445	-21	kworker/u16:2+events_unbound	00:18:45	4
2377889	99	33	31,2	cyclictest	3002840	-21	kworker/u16:4+events_unbound	23:54:03	4
2377889	99	33	31,2	cyclictest	3002840	-21	kworker/u16:4+events_unbound	23:49:06	4
2377889	99	33	31,2	cyclictest	2784029	-21	kworker/u16:1+events_unbound	22:34:15	4
2377889	99	33	31,2	cyclictest	2684708	-21	kworker/u16:3+events_unbound	21:51:53	4
2377889	99	33	31,2	cyclictest	2575323	-21	kworker/u16:2+events_unbound	21:41:27	4
2377889	99	33	31,2	cyclictest	2526805	-21	kworker/u16:4+flush-8:0	21:07:32	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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