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 Wed Apr 01, 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
579876	2	59	48,7	sleep6	0	-21	swapper/6	18:57:45	6
579876	2	59	48,7	sleep6	0	-21	swapper/6	18:57:45	6
589272	99	51	43,7	cyclictest	1075612	-21	latency_hist	22:47:40	7
588753	2	50	39,7	sleep4	0	-21	swapper/4	18:59:51	4
588753	2	50	39,7	sleep4	0	-21	swapper/4	18:59:51	4
588810	2	47	36,8	sleep5	0	-21	swapper/5	19:00:40	5
588810	2	47	36,8	sleep5	0	-21	swapper/5	19:00:40	5
589266	99	46	42,3	cyclictest	1096601	-21	kworker/u16:4+flush-8:0	23:12:41	5
589261	99	45	43,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	21:41:12	4
589261	99	44	41,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	21:57:43	4
589261	99	43	41,2	cyclictest	927537	-21	kworker/u16:1+events_unbound	22:27:04	4
589261	99	43	41,2	cyclictest	1096601	-21	kworker/u16:4+events_unbound	23:10:43	4
589261	99	42	40,2	cyclictest	836108	-21	kworker/u16:3+events_unbound	21:20:12	4
589261	99	42	40,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	22:12:23	4
589261	99	42	40,2	cyclictest	1184539	-21	kworker/u16:4+events_unbound	23:39:48	4
589272	99	41	35,5	cyclictest	1283826	-21	latency_hist	00:17:40	7
589261	99	41	39,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	21:49:03	4
589261	99	41	39,2	cyclictest	1305524	-21	kworker/u16:2+events_unbound	00:27:27	4
589261	99	41	39,2	cyclictest	1217068	-21	kworker/u16:1+events_unbound	23:45:42	4
589261	99	41	39,2	cyclictest	1096601	-21	kworker/u16:4+events_unbound	23:07:18	4
589261	99	41	39,2	cyclictest	1063567	-21	kworker/u16:1+events_unbound	23:20:19	4
589266	99	40	38,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:32:36	5
589261	99	40	38,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	22:41:24	4
589261	99	40	38,2	cyclictest	602793	-21	kworker/u16:1+events_unbound	21:26:13	4
589261	99	40	38,2	cyclictest	1284254	-21	kworker/u16:1+events_unbound	00:19:54	4
589261	99	40	38,2	cyclictest	1232524	-21	kworker/u16:2+events_unbound	23:57:39	4
589261	99	40	37,2	cyclictest	1217068	-21	kworker/u16:1+events_unbound	23:57:55	4
589261	99	39	37,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	21:54:04	4
589261	99	39	37,2	cyclictest	602793	-21	kworker/u16:1+events_unbound	21:32:07	4
589261	99	39	37,2	cyclictest	602793	-21	kworker/u16:1+events_unbound	21:16:27	4
589261	99	39	37,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	00:05:08	4
589261	99	39	37,2	cyclictest	1041089	-21	kworker/u16:2+events_unbound	22:34:35	4
589261	99	38	36,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:44:24	4
589261	99	38	36,2	cyclictest	803072	-21	kworker/u16:2+events_unbound	21:05:56	4
589261	99	38	36,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	21:45:32	4
589261	99	38	36,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	00:28:55	4
579908	2	38	3,30	sleep7	0	-21	swapper/7	18:57:54	7
579908	2	38	3,30	sleep7	0	-21	swapper/7	18:57:54	7
589272	99	37	31,5	cyclictest	598653	-21	latency_hist	19:07:42	7
589272	99	37	1,34	cyclictest	918566	-21	latency_hist	21:42:41	7
589267	99	37	35,2	cyclictest	858594	-21	kworker/u16:2+flush-8:0	21:28:07	6
589266	99	37	35,1	cyclictest	602793	-21	kworker/u16:1+events_unbound	21:22:44	5
589261	99	37	35,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:55:24	4
589261	99	37	35,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:55:24	4
589261	99	37	35,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:17:39	4
589261	99	37	35,2	cyclictest	858594	-21	kworker/u16:2+events_unbound	21:34:36	4
589261	99	37	35,2	cyclictest	1160084	-21	kworker/u16:3+events_unbound	23:28:16	4
589266	99	36	33,2	cyclictest	726899	-21	kworker/u16:0+flush-8:0	21:52:51	5
589261	99	36	34,2	cyclictest	979001	-21	kworker/u16:2+events_unbound	22:21:55	4
589261	99	36	34,2	cyclictest	1160084	-21	kworker/u16:3+events_unbound	23:25:55	4
589261	99	36	34,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	00:11:22	4
589261	99	36	34,2	cyclictest	1110290	-21	kworker/u16:0+events_unbound	23:01:20	4
589267	99	35	32,2	cyclictest	569986	-21	kworker/u16:3+events_unbound	19:22:56	6
589267	99	35	32,2	cyclictest	569986	-21	kworker/u16:3+events_unbound	19:22:56	6
589266	99	35	33,2	cyclictest	560138	-21	kworker/u16:2+flush-8:0	19:32:41	5
589261	99	35	33,2	cyclictest	927537	-21	kworker/u16:1+events_unbound	22:03:35	4
589261	99	35	33,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	22:28:36	4
589261	99	35	33,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	21:10:16	4
589261	99	34	32,2	cyclictest	1242110	-21	kworker/u16:3+events_unbound	00:13:44	4
589261	99	34	32,2	cyclictest	1193689	-21	kworker/u16:6+events_unbound	23:35:12	4
589261	99	34	32,2	cyclictest	1193689	-21	kworker/u16:6+events_unbound	23:35:12	4
589261	99	34	32,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	23:17:08	4
589272	99	33	0,31	cyclictest	1271787	-21	latency_hist	00:12:40	7
589266	99	33	31,2	cyclictest	1217068	-21	kworker/u16:1+events_unbound	23:43:56	5
589266	99	33	29,3	cyclictest	1193689	-21	kworker/u16:6+events_unbound	23:38:00	5
589272	99	32	28,3	cyclictest	650	-21	systemd-journal	22:52:35	7
589261	99	32	30,2	cyclictest	1184539	-21	kworker/u16:4+events_unbound	23:48:38	4
589261	99	32	30,2	cyclictest	1063567	-21	kworker/u16:1+events_unbound	22:51:36	4
589266	99	31	29,2	cyclictest	745842	-21	kworker/u16:3+events_unbound	20:37:36	5
589266	99	31	29,2	cyclictest	1217068	-21	kworker/u16:1+flush-8:0	23:48:42	5
589261	99	31	29,2	cyclictest	688516	-21	kworker/u16:0+events_unbound	19:53:55	4
589266	99	30	28,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	22:38:12	5
589266	99	29	27,2	cyclictest	927537	-21	kworker/u16:1+flush-8:0	22:17:47	5
589266	99	29	26,2	cyclictest	726899	-21	kworker/u16:0+flush-8:0	21:12:47	5
589261	99	29	27,2	cyclictest	602793	-21	kworker/u16:1+events_unbound	19:33:55	4
589267	99	28	25,2	cyclictest	726899	-21	kworker/u16:0+flush-8:0	22:12:55	6
589266	99	28	26,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	00:03:01	5
589266	99	28	26,2	cyclictest	1063567	-21	kworker/u16:1+events_unbound	23:03:56	5
589266	99	28	25,2	cyclictest	1217068	-21	kworker/u16:1+events_unbound	23:57:47	5
589266	99	28	25,2	cyclictest	1146853	-21	kworker/u16:0+events_unbound	00:22:53	5
589266	99	27	25,2	cyclictest	1232524	-21	kworker/u16:2+flush-8:0	00:07:56	5
589261	99	27	25,2	cyclictest	698341	-21	kworker/u16:4+events_unbound	20:08:11	4
589261	99	27	25,2	cyclictest	698341	-21	kworker/u16:4+events_unbound	20:08:11	4
589261	99	27	25,2	cyclictest	569986	-21	kworker/u16:3+events_unbound	19:38:52	4
589261	99	27	24,2	cyclictest	745842	-21	kworker/u16:3+flush-8:0	20:42:41	4
589266	99	26	23,2	cyclictest	602793	-21	kworker/u16:1+flush-8:0	21:32:41	5
589272	99	25	20,4	cyclictest	650	-21	systemd-journal	22:27:35	7
589267	99	25	21,3	cyclictest	1063567	-21	kworker/u16:1+events_unbound	22:58:03	6
589266	99	25	23,2	cyclictest	726899	-21	kworker/u16:0+flush-8:0	21:08:15	5
589266	99	25	21,3	cyclictest	858594	-21	kworker/u16:2+events_unbound	21:37:53	5
589261	99	25	23,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	20:58:05	4
589261	99	25	22,2	cyclictest	726899	-21	kworker/u16:0+events_unbound	20:47:59	4
589261	99	25	22,2	cyclictest	560138	-21	kworker/u16:2+flush-8:0	19:47:52	4
589272	99	24	21,2	cyclictest	124	-21	kswapd0	22:17:55	7
589266	99	24	23,1	cyclictest	803072	-21	kworker/u16:2+events_unbound	21:03:51	5
589266	99	24	22,2	cyclictest	1146853	-21	kworker/u16:0+flush-8:0	23:22:47	5
589261	99	24	21,2	cyclictest	560138	-21	kworker/u16:2+events_unbound	19:12:51	4
589267	99	23	21,2	cyclictest	1063567	-21	kworker/u16:1+events_unbound	23:33:09	6
589267	99	23	21,2	cyclictest	1063567	-21	kworker/u16:1+events_unbound	23:33:09	6
589266	99	23	21,2	cyclictest	906539	-21	kworker/u16:3+events_unbound	21:58:07	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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