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 Sat Jul 04, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
921524	2	91	0,0	sleep5	0	-21	swapper/5	08:34:13	5
743264	2	44	34,7	sleep5	0	-21	swapper/5	07:05:20	5
743513	2	42	32,7	sleep4	0	-21	swapper/4	07:08:48	4
741762	2	39	3,30	sleep7	0	-21	swapper/7	07:04:17	7
743800	99	38	37,1	cyclictest	1150812	-21	kworker/u16:7+events_unbound	10:19:13	4
743809	99	36	33,2	cyclictest	895164	-21	sed	08:24:08	7
743809	99	35	29,5	cyclictest	844904	-21	latency_hist	07:58:51	7
743800	99	35	34,1	cyclictest	1164925	-21	kworker/u16:0+events_unbound	10:26:17	4
743800	99	35	32,2	cyclictest	1054826	-21	kworker/u16:3+events_unbound	09:39:05	4
743800	99	34	32,2	cyclictest	1469688	-21	kworker/u16:3+events_unbound	12:33:50	4
743809	99	33	32,0	cyclictest	0	-21	swapper/7	10:59:28	7
743809	99	33	30,2	cyclictest	1332182	-21	ps	11:29:22	7
743809	99	33	0,31	cyclictest	971928	-21	cat	09:04:04	7
743800	99	33	31,2	cyclictest	1262377	-21	kworker/u16:2+events_unbound	11:38:51	4
743349	2	32	21,8	sleep6	0	-21	swapper/6	07:06:33	6
743804	99	31	29,2	cyclictest	714852	-21	kworker/u16:0+flush-8:0	08:19:16	6
743800	99	31	29,2	cyclictest	743570	-21	kworker/u16:3+flush-8:0	07:39:22	4
743800	99	31	29,2	cyclictest	743570	-21	kworker/u16:3+flush-8:0	07:39:22	4
743800	99	31	29,2	cyclictest	1286430	-21	kworker/u16:4+events_unbound	11:24:25	4
743800	99	31	27,3	cyclictest	1334137	-21	kworker/u16:3+flush-8:0	11:38:51	4
743809	99	30	28,1	cyclictest	1138000	-21	ssh	10:10:19	7
743809	99	30	27,2	cyclictest	923987	-21	ip_192.168.115.	08:39:07	7
743809	99	30	26,3	cyclictest	1289539	-21	grep	11:14:11	7
743804	99	30	27,2	cyclictest	1127725	-21	kworker/u16:3+events_unbound	10:15:57	6
1146902	2	30	0,1	chrt	0	-21	swapper/5	10:14:14	5
743809	99	29	28,0	cyclictest	0	-21	swapper/7	09:27:35	7
743800	99	29	27,2	cyclictest	1002669	-21	kworker/u16:4+flush-8:0	09:24:05	4
743800	99	29	25,3	cyclictest	1422167	-21	kworker/u16:5+flush-8:0	12:18:51	4
1159065	2	29	0,1	chrt	1159066	-21	kthreadcore	10:19:13	7
743809	99	28	27,0	cyclictest	0	-21	swapper/7	11:46:07	7
743809	99	28	27,0	cyclictest	0	-21	swapper/7	10:43:03	7
743809	99	28	27,0	cyclictest	0	-21	swapper/7	10:02:32	7
743809	99	27	26,0	cyclictest	0	-21	swapper/7	12:10:40	7
743809	99	27	26,0	cyclictest	0	-21	swapper/7	09:57:39	7
743809	99	27	26,0	cyclictest	0	-21	swapper/7	08:54:07	7
743800	99	27	24,3	cyclictest	893565	-21	kworker/u16:1+flush-8:0	09:09:17	4
743800	99	27	24,3	cyclictest	893565	-21	kworker/u16:1+flush-8:0	09:09:17	4
829100	2	26	0,1	sleep4	0	-21	swapper/4	07:49:09	4
743809	99	26	25,0	cyclictest	0	-21	swapper/7	12:08:43	7
743809	99	26	25,0	cyclictest	0	-21	swapper/7	10:45:59	7
743809	99	26	25,0	cyclictest	0	-21	swapper/7	09:09:54	7
743809	99	26	25,0	cyclictest	0	-21	swapper/7	09:09:54	7
743809	99	26	24,1	cyclictest	1151856	-21	ssh	10:18:16	7
743800	99	26	24,2	cyclictest	1444883	-21	kworker/u16:2+flush-8:0	12:19:21	4
1493972	2	26	0,1	chrt	1493973	-21	cat	12:38:51	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	10:31:12	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	10:31:12	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	09:52:11	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	09:52:11	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	09:32:23	7
743809	99	25	24,0	cyclictest	0	-21	swapper/7	07:29:15	7
743809	99	25	23,1	cyclictest	1052127	-21	sh	09:34:39	7
743800	99	25	23,2	cyclictest	942414	-21	kworker/u16:2+events_unbound	09:14:18	4
743800	99	25	22,2	cyclictest	1002669	-21	kworker/u16:4+flush-8:0	09:33:57	4
743809	99	24	23,0	cyclictest	0	-21	swapper/7	10:57:43	7
743809	99	24	23,0	cyclictest	0	-21	swapper/7	07:34:06	7
743809	99	24	23,0	cyclictest	0	-21	swapper/7	07:20:30	7
743809	99	24	21,2	cyclictest	1002514	-21	pluginstate	09:14:20	7
743800	99	24	22,2	cyclictest	762178	-21	kworker/u16:1+flush-8:0	07:18:52	4
1378728	2	24	0,1	chrt	1378729	-21	kthreadcore	11:49:14	7
743809	99	23	22,0	cyclictest	0	-21	swapper/7	08:08:38	7
743809	99	23	22,0	cyclictest	0	-21	swapper/7	07:47:42	7
743809	99	23	22,0	cyclictest	0	-21	swapper/7	07:15:21	7
743809	99	23	20,2	cyclictest	1435718	-21	kthreadcore	12:14:09	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	09:44:48	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	09:22:07	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	08:52:54	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	08:29:29	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	08:09:15	7
743809	99	22	21,0	cyclictest	0	-21	swapper/7	07:53:06	7
743809	99	21	20,0	cyclictest	0	-21	swapper/7	07:11:13	7
743800	99	21	19,2	cyclictest	1422167	-21	kworker/u16:5+events_unbound	12:34:25	4
743809	99	20	19,0	cyclictest	0	-21	swapper/7	11:59:59	7
743809	99	20	19,0	cyclictest	0	-21	swapper/7	07:40:18	7
743809	99	20	19,0	cyclictest	0	-21	swapper/7	07:40:18	7
743809	99	20	19,0	cyclictest	0	-21	swapper/7	07:27:21	7
743800	99	20	19,1	cyclictest	1164925	-21	kworker/u16:0+events_unbound	10:34:16	4
743809	99	19	0,17	cyclictest	1278	-21	snmpd	08:14:22	7
743800	99	19	17,2	cyclictest	893565	-21	kworker/u16:1+events_unbound	08:53:51	4
743800	99	19	16,2	cyclictest	1262377	-21	kworker/u16:2+flush-8:0	11:43:57	4
743809	99	18	17,0	cyclictest	0	-21	swapper/7	08:03:22	7
743809	99	18	0,16	cyclictest	1102	-21	ntpd	10:37:51	7
743800	99	18	16,2	cyclictest	1150812	-21	kworker/u16:7+events_unbound	10:44:24	4
743800	99	18	16,2	cyclictest	1054438	-21	kworker/u16:2+events_unbound	10:09:09	4
743800	99	18	15,2	cyclictest	1262377	-21	kworker/u16:2+flush-8:0	11:18:56	4
743800	99	18	15,2	cyclictest	1054438	-21	kworker/u16:2+flush-8:0	10:03:46	4
743809	99	16	15,0	cyclictest	0	-21	swapper/7	09:03:33	7
743809	99	16	15,0	cyclictest	0	-21	swapper/7	08:45:34	7
743809	99	16	15,0	cyclictest	0	-21	swapper/7	08:23:04	7
743809	99	16	13,2	cyclictest	1478148	-21	memory	12:29:16	7
743803	99	16	15,1	cyclictest	0	-21	swapper/5	10:03:57	5
743800	99	16	14,2	cyclictest	1225205	-21	kworker/u16:1+events_unbound	10:49:09	4
743800	99	16	14,2	cyclictest	1164925	-21	kworker/u16:0+flush-8:0	10:39:21	4
743800	99	16	13,2	cyclictest	865947	-21	kworker/u16:3+flush-8:0	08:54:17	4
743800	99	16	13,2	cyclictest	1150812	-21	kworker/u16:7+events_unbound	11:29:09	4
743800	99	16	0,16	cyclictest	0	-21	swapper/4	11:05:53	4
743809	99	15	12,2	cyclictest	0	-21	swapper/7	08:34:17	7
743804	99	15	0,1	cyclictest	0	-21	swapper/6	10:43:29	6
743804	99	15	0,15	cyclictest	0	-21	swapper/6	11:51:07	6
743803	99	15	0,1	cyclictest	0	-21	swapper/5	07:09:19	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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