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 Sun Mar 15, 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
2583291	2	97	0,1	sleep7	2583289	-21	awk	08:38:46	7
2398111	99	62	56,5	cyclictest	2611882	-21	latency_hist	08:53:46	7
2398106	99	61	57,3	cyclictest	3016048	-21	kworker/u16:2+flush-8:0	11:58:46	5
3092461	2	55	0,0	sleep7	3092462	-21	cat	12:14:06	7
2397591	2	53	43,7	sleep4	0	-21	swapper/4	07:00:29	4
2398108	99	49	47,2	cyclictest	2631052	-21	kworker/u16:0+events_unbound	09:44:16	6
2397553	2	48	38,7	sleep6	0	-21	swapper/6	06:59:59	6
2398108	99	45	43,2	cyclictest	3085087	-21	kworker/u16:3+flush-8:0	12:09:18	6
2398108	99	45	43,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	07:29:13	6
2398108	99	45	43,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	07:29:13	6
2397675	2	45	34,8	sleep5	0	-21	swapper/5	07:01:42	5
2398111	99	44	0,42	cyclictest	2655054	-21	latency_hist	09:13:47	7
2398108	99	44	42,2	cyclictest	2898453	-21	kworker/u16:3+flush-8:0	11:09:21	6
2398108	99	44	42,2	cyclictest	2847887	-21	kworker/u16:2+events_unbound	10:49:17	6
2398108	99	44	42,2	cyclictest	2751289	-21	kworker/u16:1+events_unbound	10:46:23	6
2673272	2	43	0,1	sleep6	0	-21	swapper/6	09:19:08	6
2398111	99	43	37,5	cyclictest	2468653	-21	latency_hist	07:38:47	7
2398108	99	43	41,2	cyclictest	2847887	-21	kworker/u16:2+flush-8:0	10:59:14	6
2398106	99	43	40,2	cyclictest	3098775	-21	kworker/u16:2+flush-8:0	12:33:41	5
2398108	99	42	40,2	cyclictest	2978132	-21	kworker/u16:0+events_unbound	11:30:14	6
2398108	99	41	39,2	cyclictest	3040516	-21	kworker/u16:3+events_unbound	11:54:41	6
2398108	99	41	39,2	cyclictest	2458893	-21	kworker/u16:3+events_unbound	08:04:17	6
2397603	2	41	5,31	sleep7	0	-21	swapper/7	07:00:40	7
2398108	99	40	38,2	cyclictest	3085087	-21	kworker/u16:3+events_unbound	12:14:24	6
2398108	99	40	38,2	cyclictest	2847887	-21	kworker/u16:2+flush-8:0	10:39:15	6
2398111	99	39	33,5	cyclictest	650	-21	systemd-journal	11:38:46	7
2398111	99	39	33,5	cyclictest	3028057	-21	latency_hist	11:48:46	7
2398108	99	39	37,2	cyclictest	3016048	-21	kworker/u16:2+events_unbound	12:02:21	6
2398108	99	39	37,2	cyclictest	2832419	-21	kworker/u16:3+flush-8:0	10:28:46	6
2398108	99	39	37,2	cyclictest	2751289	-21	kworker/u16:1+flush-8:0	10:34:16	6
2398111	99	38	33,4	cyclictest	2943675	-21	latency_hist	11:13:46	7
2398108	99	38	36,2	cyclictest	3016048	-21	kworker/u16:2+flush-8:0	11:44:37	6
2398108	99	38	36,2	cyclictest	2992092	-21	kworker/u16:1+events_unbound	11:36:09	6
2398108	99	38	36,2	cyclictest	2847887	-21	kworker/u16:2+events_unbound	11:20:37	6
2398108	99	38	36,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	09:32:58	6
2398108	99	38	36,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	09:26:08	6
2398108	99	38	35,2	cyclictest	2787901	-21	kworker/u16:0+flush-8:0	10:28:51	6
2398106	99	38	36,2	cyclictest	2751289	-21	kworker/u16:1+flush-8:0	10:49:23	5
2398101	99	38	36,2	cyclictest	3016048	-21	kworker/u16:2+flush-8:0	11:59:17	4
2398108	99	37	35,2	cyclictest	3098775	-21	kworker/u16:2+events_unbound	12:26:07	6
2398108	99	37	35,2	cyclictest	2751289	-21	kworker/u16:1+events_unbound	10:10:47	6
2398108	99	37	35,2	cyclictest	2631052	-21	kworker/u16:0+events_unbound	09:41:52	6
2398106	99	37	34,2	cyclictest	2898453	-21	kworker/u16:3+flush-8:0	11:18:46	5
2398106	99	37	33,3	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	07:49:18	5
2398111	99	36	0,34	cyclictest	124	-21	kswapd0	11:25:47	7
2398108	99	36	34,2	cyclictest	2992092	-21	kworker/u16:1+events_unbound	12:29:30	6
2398108	99	36	34,2	cyclictest	2751289	-21	kworker/u16:1+events_unbound	10:20:35	6
2398108	99	36	34,2	cyclictest	2751289	-21	kworker/u16:1+events_unbound	10:01:24	6
2398108	99	36	34,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	09:14:16	6
2398111	99	35	31,3	cyclictest	2554755	-21	sed	08:23:46	7
2398108	99	35	33,2	cyclictest	2978132	-21	kworker/u16:0+events_unbound	12:23:31	6
2398108	99	35	33,2	cyclictest	2898453	-21	kworker/u16:3+events_unbound	11:07:06	6
2398108	99	35	33,2	cyclictest	2898453	-21	kworker/u16:3+events_unbound	10:56:09	6
2398108	99	35	33,2	cyclictest	2898453	-21	kworker/u16:3+events_unbound	10:56:09	6
2398108	99	35	33,2	cyclictest	2554479	-21	kworker/u16:3+flush-8:0	08:29:14	6
2398108	99	35	32,2	cyclictest	2458893	-21	kworker/u16:3+events_unbound	07:49:00	6
2398108	99	35	32,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	08:38:57	6
2398106	99	35	33,2	cyclictest	2397866	-21	kworker/u16:1+flush-8:0	07:19:18	5
2398106	99	35	32,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	09:24:01	5
2398101	99	35	32,2	cyclictest	2856235	-21	kworker/u16:4+flush-8:0	10:34:58	4
2398108	99	34	32,2	cyclictest	2898453	-21	kworker/u16:3+events_unbound	11:16:35	6
2398108	99	33	31,2	cyclictest	2978481	-21	kworker/u16:6+events_unbound	11:41:12	6
2398108	99	33	31,2	cyclictest	2787901	-21	kworker/u16:0+events_unbound	10:14:53	6
2398108	99	33	31,2	cyclictest	2787901	-21	kworker/u16:0+events_unbound	10:14:53	6
2398108	99	33	31,2	cyclictest	2772284	-21	kworker/u16:4+events_unbound	10:08:11	6
2398108	99	33	31,2	cyclictest	2751289	-21	kworker/u16:1+events_unbound	11:25:26	6
2398108	99	33	31,2	cyclictest	2487924	-21	kworker/u16:0+events_unbound	08:11:58	6
2398108	99	33	31,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	09:34:14	6
2398108	99	33	31,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	09:34:14	6
2398106	99	33	30,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	09:49:04	5
2398101	99	33	32,1	cyclictest	2978132	-21	kworker/u16:0+events_unbound	11:44:55	4
2398101	99	33	30,2	cyclictest	2772284	-21	kworker/u16:4+flush-8:0	10:08:42	4
2398108	99	32	30,2	cyclictest	3016048	-21	kworker/u16:2+events_unbound	12:05:11	6
2398108	99	32	30,2	cyclictest	2992092	-21	kworker/u16:1+events_unbound	11:50:51	6
2398108	99	32	30,2	cyclictest	2677868	-21	kworker/u16:3+flush-8:0	09:54:20	6
2398108	99	32	30,2	cyclictest	2677868	-21	kworker/u16:3+events_unbound	09:48:48	6
2398108	99	32	30,2	cyclictest	2397866	-21	kworker/u16:1+events_unbound	07:43:47	6
2398108	99	32	30,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	09:09:12	6
2398108	99	32	30,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	08:00:18	6
2398106	99	32	30,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	08:44:13	5
2398108	99	31	29,2	cyclictest	2487924	-21	kworker/u16:0+events_unbound	08:46:57	6
2993637	2	30	0,1	chrt	0	-21	swapper/4	11:34:03	4
2398108	99	30	28,2	cyclictest	2397866	-21	kworker/u16:1+events_unbound	07:45:58	6
2398108	99	30	28,2	cyclictest	2397866	-21	kworker/u16:1+events_unbound	07:28:27	6
2398108	99	30	28,2	cyclictest	2370536	-21	kworker/u16:2+flush-8:0	09:04:12	6
2598291	2	29	0,1	chrt	2598292	-21	kthreadcore	08:44:07	7
2398108	99	29	27,2	cyclictest	2602365	-21	kworker/u16:1+events_unbound	08:52:23	6
2398108	99	29	27,2	cyclictest	2458893	-21	kworker/u16:3+events_unbound	07:57:03	6
2398108	99	29	27,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	07:38:02	6
2398108	99	29	26,2	cyclictest	2370536	-21	kworker/u16:2+events_unbound	08:59:02	6
2779589	2	28	0,1	chrt	2779590	-21	kthreadcore	10:04:06	7
2398108	99	28	26,2	cyclictest	2487924	-21	kworker/u16:0+events_unbound	08:25:58	6
2398108	99	28	26,2	cyclictest	2397866	-21	kworker/u16:1+events_unbound	07:20:46	6
2398106	99	28	26,2	cyclictest	2898453	-21	kworker/u16:3+flush-8:0	11:25:51	5
2398106	99	28	26,2	cyclictest	2847887	-21	kworker/u16:2+flush-8:0	10:58:41	5
2398106	99	28	26,2	cyclictest	2847887	-21	kworker/u16:2+flush-8:0	10:58:41	5
2398106	99	28	26,2	cyclictest	2612272	-21	kworker/u16:3+flush-8:0	08:58:41	5
2881487	2	27	0,1	chrt	2881485	-21	ssh	10:44:53	7
2702109	2	27	0,1	chrt	2702110	-21	ssh	09:31:44	7
2398108	99	27	25,2	cyclictest	875378	-21	kworker/u16:3+events_unbound	07:08:06	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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