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 May 21, 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
2903588	2	55	45,7	sleep4	0	-21	swapper/4	19:07:10	4
2903343	2	48	37,8	sleep5	0	-21	swapper/5	19:03:42	5
2903923	99	43	0,41	cyclictest	635	-21	systemd-journal	21:27:36	7
2903923	99	42	0,40	cyclictest	635	-21	systemd-journal	19:12:36	7
2903918	99	42	38,3	cyclictest	3271601	-21	kworker/u16:4+flush-8:0	22:13:02	6
2903423	2	41	5,31	sleep7	0	-21	swapper/7	19:04:48	7
2903918	99	39	37,2	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:20:47	6
2903918	99	39	37,2	cyclictest	2955773	-21	kworker/u16:1+events_unbound	19:57:32	6
2903923	99	36	0,34	cyclictest	3319635	-21	latency_hist	22:22:36	7
2903918	99	36	34,2	cyclictest	3353046	-21	kworker/u16:1+events_unbound	23:10:35	6
2903918	99	36	33,3	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:14:47	6
2903923	99	35	29,5	cyclictest	3525289	-21	latency_hist	23:47:35	7
2903918	99	35	33,2	cyclictest	3622004	-21	kworker/u16:3+events_unbound	00:36:11	6
2903918	99	35	33,2	cyclictest	3500229	-21	kworker/u16:0+events_unbound	00:11:47	6
2903918	99	35	33,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	21:52:19	6
2903918	99	35	33,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	21:52:19	6
2903918	99	35	33,2	cyclictest	3118815	-21	kworker/u16:1+events_unbound	21:09:11	6
2903918	99	35	33,2	cyclictest	3118815	-21	kworker/u16:1+events_unbound	21:09:11	6
2903918	99	35	32,2	cyclictest	3085307	-21	kworker/u16:0+events_unbound	20:43:02	6
2903918	99	35	29,2	cyclictest	3353046	-21	kworker/u16:1+events_unbound	22:52:28	6
2903923	99	34	29,4	cyclictest	3070893	-21	latency_hist	20:32:36	7
2903918	99	34	32,2	cyclictest	3513147	-21	kworker/u16:2+events_unbound	23:50:47	6
2903918	99	34	32,2	cyclictest	3513147	-21	kworker/u16:2+events_unbound	00:23:27	6
2903913	99	34	32,2	cyclictest	3500229	-21	kworker/u16:0+flush-8:0	23:37:50	5
2903918	99	33	31,2	cyclictest	3513147	-21	kworker/u16:2+events_unbound	23:47:31	6
2903918	99	33	31,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	23:03:35	6
2903918	99	33	31,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	20:47:55	6
2903918	99	32	30,2	cyclictest	3486546	-21	kworker/u16:1+events_unbound	23:34:27	6
2903918	99	32	30,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	22:02:36	6
2903918	99	32	29,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	22:02:40	6
2903908	99	32	29,2	cyclictest	3353046	-21	kworker/u16:1+events_unbound	22:47:51	4
2903918	99	31	29,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	21:25:36	6
2903918	99	31	29,2	cyclictest	2955773	-21	kworker/u16:1+events_unbound	19:42:31	6
2903918	99	31	29,2	cyclictest	2955773	-21	kworker/u16:1+events_unbound	19:42:31	6
2903913	99	31	29,2	cyclictest	3089164	-21	kworker/u16:4+events_unbound	20:58:05	5
2903918	99	30	28,2	cyclictest	3462507	-21	kworker/u16:4+flush-8:0	23:53:35	6
2903918	99	30	28,2	cyclictest	3462507	-21	kworker/u16:4+flush-8:0	23:53:35	6
2903918	99	30	28,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:45:54	6
2903913	99	30	28,2	cyclictest	3462507	-21	kworker/u16:4+events_unbound	00:12:50	5
2903918	99	29	27,2	cyclictest	3595614	-21	kworker/u16:1+events_unbound	00:31:06	6
2903918	99	29	27,2	cyclictest	3452688	-21	kworker/u16:3+events_unbound	23:22:20	6
2903918	99	29	27,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	22:26:07	6
2903918	99	29	27,2	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:28:46	6
2903918	99	29	27,2	cyclictest	2639756	-21	kworker/u16:2+events_unbound	19:19:47	6
2903918	99	29	26,2	cyclictest	3317914	-21	kworker/u16:2+flush-8:0	22:57:38	6
2903913	99	29	27,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	22:16:31	5
2903485	2	29	19,7	sleep6	0	-21	swapper/6	19:05:43	6
3210704	2	28	0,1	chrt	3210705	-21	ssh	21:37:36	7
2903918	99	28	26,2	cyclictest	3595614	-21	kworker/u16:1+events_unbound	00:17:02	6
2903918	99	28	26,2	cyclictest	3513147	-21	kworker/u16:2+events_unbound	00:19:07	6
2903918	99	28	26,2	cyclictest	3500229	-21	kworker/u16:0+flush-8:0	23:42:31	6
2903918	99	28	26,2	cyclictest	3462507	-21	kworker/u16:4+events_unbound	23:59:03	6
2903918	99	28	26,2	cyclictest	3353046	-21	kworker/u16:1+events_unbound	23:17:35	6
2903918	99	28	26,2	cyclictest	3305539	-21	kworker/u16:1+events_unbound	22:20:55	6
2903918	99	28	26,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	21:43:23	6
2903913	99	28	26,2	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:20:12	5
2903913	99	28	26,2	cyclictest	2910520	-21	kworker/u16:1+flush-8:0	19:17:52	5
2903918	99	27	26,1	cyclictest	3462507	-21	kworker/u16:4+events_unbound	23:25:42	6
2903918	99	27	25,2	cyclictest	3500229	-21	kworker/u16:0+events_unbound	00:04:31	6
2903918	99	27	25,2	cyclictest	3172112	-21	kworker/u16:0+events_unbound	21:40:18	6
2903913	99	27	25,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:43:23	5
2903908	99	27	26,1	cyclictest	3427213	-21	kworker/u16:0+events_unbound	23:27:59	4
2903908	99	27	25,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	21:38:03	4
2903918	99	26	24,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:34:35	6
2903918	99	26	24,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:30:47	6
2903918	99	26	24,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:30:47	6
2903918	99	26	24,2	cyclictest	3138569	-21	kworker/u16:2+flush-8:0	21:33:22	6
2903918	99	26	24,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	22:09:15	6
2903918	99	26	24,2	cyclictest	2984384	-21	kworker/u16:2+flush-8:0	20:22:51	6
2903918	99	26	24,2	cyclictest	2984384	-21	kworker/u16:2+events_unbound	20:10:47	6
2903913	99	26	24,2	cyclictest	3500229	-21	kworker/u16:0+events_unbound	00:28:47	5
2903913	99	26	24,2	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:39:19	5
2903913	99	26	24,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	20:41:50	5
2903918	99	25	23,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	22:53:52	6
2903918	99	25	23,2	cyclictest	3051757	-21	kworker/u16:3+events_unbound	21:53:27	6
2903913	99	25	23,2	cyclictest	3353046	-21	kworker/u16:1+events_unbound	22:49:48	5
2903913	99	25	23,2	cyclictest	3138569	-21	kworker/u16:2+events_unbound	21:45:28	5
2903908	99	25	23,2	cyclictest	2984384	-21	kworker/u16:2+events_unbound	20:38:07	4
2903923	99	24	19,4	cyclictest	3392226	-21	latency_hist	22:52:36	7
2903923	99	24	16,7	cyclictest	3549466	-21	latency_hist	23:57:36	7
2903923	99	24	16,7	cyclictest	3549466	-21	latency_hist	23:57:36	7
2903918	99	24	22,2	cyclictest	3004043	-21	kworker/u16:0+events_unbound	20:14:46	6
2903913	99	24	22,2	cyclictest	3452688	-21	kworker/u16:3+events_unbound	23:32:58	5
2903913	99	24	22,2	cyclictest	3085307	-21	kworker/u16:0+events_unbound	20:56:02	5
2903913	99	24	22,2	cyclictest	2984384	-21	kworker/u16:2+events_unbound	19:56:49	5
2903913	99	24	21,3	cyclictest	2984384	-21	kworker/u16:2+flush-8:0	19:47:58	5
2903923	99	23	0,22	cyclictest	3610043	-21	latency_hist	00:22:36	7
2903918	99	23	21,2	cyclictest	2955773	-21	kworker/u16:1+events_unbound	20:31:46	6
2903913	99	23	21,2	cyclictest	3622004	-21	kworker/u16:3+events_unbound	00:36:07	5
2903913	99	23	21,2	cyclictest	3462507	-21	kworker/u16:4+events_unbound	23:52:50	5
2903913	99	23	21,2	cyclictest	3462507	-21	kworker/u16:4+events_unbound	23:52:50	5
2903913	99	23	21,2	cyclictest	3331985	-21	kworker/u16:3+events_unbound	23:03:27	5
2903913	99	23	21,2	cyclictest	2639756	-21	kworker/u16:2+flush-8:0	19:24:39	5
2903913	99	23	20,2	cyclictest	2910520	-21	kworker/u16:1+events_unbound	19:12:37	5
2903908	99	23	21,2	cyclictest	3562578	-21	kworker/u16:1+events_unbound	00:03:05	4
2903923	99	22	21,0	cyclictest	0	-21	swapper/7	00:06:26	7
2903913	99	22	20,2	cyclictest	3172112	-21	kworker/u16:0+flush-8:0	22:23:21	5
2903913	99	22	20,2	cyclictest	3051757	-21	kworker/u16:3+flush-8:0	21:03:58	5
2903913	99	22	20,2	cyclictest	3004043	-21	kworker/u16:0+events_unbound	20:04:46	5
2903913	99	22	20,2	cyclictest	2639756	-21	kworker/u16:2+events_unbound	19:08:27	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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