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 Mar 05, 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
1824926	2	49	39,7	sleep4	0	-21	swapper/4	07:04:10	4
1816218	2	45	1,36	sleep7	0	-21	swapper/7	06:59:39	7
6265	89	44	0,38	rtkit-daemon	0	-21	swapper/6	07:00:18	6
1825247	99	41	39,2	cyclictest	2472789	-21	kworker/u16:4+events_unbound	12:24:03	5
1825247	99	41	39,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:36:20	5
1825247	99	41	39,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	09:50:36	5
1825252	99	40	35,4	cyclictest	2314753	-21	latency_hist	10:49:26	7
1825252	99	40	35,4	cyclictest	2314753	-21	latency_hist	10:49:26	7
1825252	99	40	34,5	cyclictest	1982511	-21	latency_hist	08:24:27	7
1825252	99	40	0,38	cyclictest	1033	-21	rs:main		7
1825252	99	40	0,38	cyclictest	1033	-21	rs:main		7
1825247	99	40	39,1	cyclictest	1963324	-21	kworker/u16:3+events_unbound	09:34:23	5
1825247	99	40	38,2	cyclictest	2118741	-21	kworker/u16:6+events_unbound	10:12:04	5
1825247	99	40	37,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	11:09:29	5
1825247	99	38	37,1	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:25:39	5
1825247	99	38	37,1	cyclictest	2118741	-21	kworker/u16:6+events_unbound	09:54:27	5
1825247	99	38	36,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:04:24	5
1825247	99	38	36,2	cyclictest	1963324	-21	kworker/u16:3+events_unbound	09:45:33	5
1825242	99	37	35,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:24:48	4
1825252	99	36	31,4	cyclictest	2436200	-21	latency_hist	11:39:26	7
1825247	99	36	34,2	cyclictest	2518914	-21	kworker/u16:3+events_unbound	12:17:20	5
1825247	99	36	34,2	cyclictest	2266589	-21	kworker/u16:1+events_unbound	11:17:20	5
1825247	99	36	34,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:21:23	5
1825247	99	36	34,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	09:59:57	5
1825247	99	36	34,2	cyclictest	2118741	-21	kworker/u16:6+events_unbound	10:16:08	5
1825247	99	36	34,2	cyclictest	2049724	-21	kworker/u16:0+flush-8:0	09:09:57	5
1825242	99	36	32,3	cyclictest	2118503	-21	kworker/u16:5+events_unbound	10:09:51	4
1825247	99	35	33,2	cyclictest	2266589	-21	kworker/u16:1+events_unbound	10:42:59	5
1825247	99	35	33,2	cyclictest	2049724	-21	kworker/u16:0+events_unbound	09:06:28	5
1824541	2	35	23,8	sleep5	0	-21	swapper/5	07:00:02	5
1825247	99	34	32,2	cyclictest	2533608	-21	kworker/u16:1+events_unbound	12:34:24	5
1825247	99	34	32,2	cyclictest	2266589	-21	kworker/u16:1+events_unbound	10:46:37	5
1825247	99	34	32,2	cyclictest	2266589	-21	kworker/u16:1+events_unbound	10:46:37	5
1825247	99	34	32,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	12:14:07	5
1825247	99	34	32,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	11:39:55	5
1825247	99	34	32,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	11:31:32	5
1825247	99	34	32,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	10:22:33	5
1825242	99	34	31,3	cyclictest	2118503	-21	kworker/u16:5+flush-8:0	09:26:40	4
1825242	99	34	31,3	cyclictest	2118503	-21	kworker/u16:5+flush-8:0	09:26:40	4
1825247	99	33	31,2	cyclictest	2118741	-21	kworker/u16:6+events_unbound	10:25:35	5
1825247	99	33	31,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	10:35:31	5
1825247	99	33	31,2	cyclictest	1963324	-21	kworker/u16:3+flush-8:0	09:39:36	5
1825247	99	32	30,2	cyclictest	2424163	-21	kworker/u16:1+events_unbound	11:57:03	5
1825247	99	32	30,2	cyclictest	2424163	-21	kworker/u16:1+events_unbound	11:52:52	5
1825247	99	32	30,2	cyclictest	2266589	-21	kworker/u16:1+events_unbound	11:07:11	5
1825247	99	32	30,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	10:51:27	5
1825247	99	32	30,2	cyclictest	2118741	-21	kworker/u16:6+events_unbound	10:09:04	5
1825247	99	32	30,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	09:35:47	5
1825247	99	32	30,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	09:28:47	5
1825247	99	32	30,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	09:28:47	5
1825247	99	32	30,2	cyclictest	1991957	-21	kworker/u16:1+events_unbound	08:39:28	5
1825242	99	32	29,2	cyclictest	1934179	-21	kworker/u16:2+events_unbound	09:09:41	4
1825252	99	31	26,4	cyclictest	650	-21	systemd-journal	08:29:27	7
1825247	99	31	29,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	10:59:12	5
1825247	99	31	29,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	10:32:04	5
1825247	99	31	29,2	cyclictest	2049724	-21	kworker/u16:0+events_unbound	09:20:44	5
1825242	99	31	29,2	cyclictest	2132280	-21	kworker/u16:0+flush-8:0	11:49:55	4
1825242	99	31	29,2	cyclictest	2118503	-21	kworker/u16:5+flush-8:0	11:39:41	4
1825242	99	31	28,2	cyclictest	2351630	-21	kworker/u16:2+flush-8:0	12:09:31	4
1825247	99	30	28,2	cyclictest	2533608	-21	kworker/u16:1+events_unbound	12:27:47	5
1825242	99	30	29,1	cyclictest	2132280	-21	kworker/u16:0+events_unbound	10:36:04	4
1825242	99	30	28,2	cyclictest	2533608	-21	kworker/u16:1+flush-8:0	12:24:44	4
1825242	99	30	28,2	cyclictest	2472789	-21	kworker/u16:4+flush-8:0	12:15:12	4
1825242	99	30	28,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	09:54:56	4
1825252	99	29	27,1	cyclictest	0	-21	swapper/7	08:59:26	7
1825247	99	29	27,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	12:05:15	5
1825247	99	28	26,2	cyclictest	2424163	-21	kworker/u16:1+events_unbound	11:47:59	5
1825247	99	28	26,2	cyclictest	1934179	-21	kworker/u16:2+events_unbound	09:17:48	5
1825247	99	28	26,2	cyclictest	1876625	-21	kworker/u16:0+flush-8:0	07:44:22	5
1825242	99	28	26,2	cyclictest	2132280	-21	kworker/u16:0+flush-8:0	10:54:26	4
1825242	99	28	26,2	cyclictest	1963324	-21	kworker/u16:3+flush-8:0	09:49:31	4
1825242	99	28	25,2	cyclictest	2118503	-21	kworker/u16:5+events_unbound	11:14:40	4
1825247	99	27	25,2	cyclictest	2424163	-21	kworker/u16:1+events_unbound	12:02:00	5
1825247	99	27	25,2	cyclictest	1963324	-21	kworker/u16:3+events_unbound	08:29:51	5
1825252	99	26	21,4	cyclictest	2569962	-21	latency_hist	12:34:26	7
1825242	99	26	24,2	cyclictest	2049724	-21	kworker/u16:0+flush-8:0	09:14:57	4
1825242	99	26	24,2	cyclictest	2049724	-21	kworker/u16:0+flush-8:0	09:04:26	4
1825242	99	26	23,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	10:59:39	4
1825242	99	26	23,2	cyclictest	1944131	-21	kworker/u16:0+events_unbound	08:24:39	4
1825252	99	25	19,5	cyclictest	1848130	-21	latency_hist	07:14:26	7
1825252	99	24	19,4	cyclictest	2217503	-21	latency_hist	10:09:26	7
2064415	2	23	0,0	sleep6	0	-21	swapper/6	09:04:45	6
1825247	99	23	21,2	cyclictest	1815777	-21	kworker/u16:1+events_unbound	07:29:57	5
1825247	99	23	21,2	cyclictest	1796328	-21	kworker/u16:2+events_unbound	07:16:17	5
1825247	99	23	21,2	cyclictest	1796328	-21	kworker/u16:2+events_unbound	07:16:17	5
1825242	99	22	20,2	cyclictest	2118503	-21	kworker/u16:5+flush-8:0	09:49:22	4
1825242	99	22	18,3	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:29:39	4
1825247	99	21	19,2	cyclictest	1815777	-21	kworker/u16:1+events_unbound	07:27:56	5
1825242	99	21	19,2	cyclictest	2351630	-21	kworker/u16:2+events_unbound	11:59:39	4
1825242	99	21	19,2	cyclictest	2132280	-21	kworker/u16:0+flush-8:0	12:29:49	4
1825242	99	21	19,2	cyclictest	2132280	-21	kworker/u16:0+flush-8:0	10:54:55	4
1825247	99	20	18,2	cyclictest	1991957	-21	kworker/u16:1+events_unbound	09:04:23	5
1825242	99	20	18,2	cyclictest	1815777	-21	kworker/u16:1+events_unbound	07:14:49	4
1825242	99	20	18,2	cyclictest	1815777	-21	kworker/u16:1+events_unbound	07:14:49	4
1825252	99	19	14,4	cyclictest	2229642	-21	latency_hist	10:14:26	7
1825247	99	19	17,2	cyclictest	1934179	-21	kworker/u16:2+events_unbound	07:59:57	5
1825247	99	19	17,2	cyclictest	1876625	-21	kworker/u16:0+events_unbound	07:54:43	5
1825247	99	19	16,2	cyclictest	1944131	-21	kworker/u16:0+events_unbound	08:24:41	5
1825242	99	19	17,2	cyclictest	2132280	-21	kworker/u16:0+events_unbound	11:44:40	4
1825242	99	19	16,2	cyclictest	2132280	-21	kworker/u16:0+flush-8:0	10:34:26	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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