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 25, 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
2285675	2	104	0,1	sleep6	68	1	rcuog/4	11:09:48	6
1744913	2	54	19,30	sleep7	0	-21	swapper/7	07:07:57	7
1744823	2	48	38,7	sleep4	0	-21	swapper/4	07:06:42	4
1745300	99	45	43,2	cyclictest	2313685	-21	kworker/u16:1+events_unbound	11:29:33	5
1745300	99	45	43,2	cyclictest	2313685	-21	kworker/u16:1+events_unbound	11:29:33	5
1745300	99	45	42,2	cyclictest	2005862	-21	kworker/u16:5+events_unbound	09:29:32	5
1745300	99	45	42,2	cyclictest	2005862	-21	kworker/u16:5+events_unbound	09:29:32	5
1745306	99	44	39,4	cyclictest	1067	-21	rs:main		7
1745300	99	44	42,2	cyclictest	1845761	-21	kworker/u16:1+flush-8:0	07:59:30	5
1744836	2	44	33,8	sleep5	0	-21	swapper/5	07:06:51	5
1745300	99	43	41,2	cyclictest	2068036	-21	kworker/u16:4+events_unbound	10:04:33	5
1745300	99	43	41,2	cyclictest	1915006	-21	kworker/u16:2+flush-8:0	08:34:41	5
1745300	99	41	39,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	12:29:49	5
1745300	99	41	39,2	cyclictest	1966293	-21	kworker/u16:2+events_unbound	09:34:50	5
1745300	99	41	38,2	cyclictest	2313685	-21	kworker/u16:1+events_unbound	11:39:16	5
1745300	99	41	38,2	cyclictest	2092537	-21	kworker/u16:0+flush-8:0	10:19:14	5
1745300	99	41	38,2	cyclictest	1744800	-21	kworker/u16:0+events_unbound	07:49:30	5
1745306	99	40	33,6	cyclictest	2166056	-21	latency_hist	10:24:15	7
1745300	99	40	38,2	cyclictest	2092537	-21	kworker/u16:0+events_unbound	10:09:32	5
1745300	99	40	38,2	cyclictest	2092537	-21	kworker/u16:0+events_unbound	10:09:32	5
1745300	99	39	37,2	cyclictest	2005862	-21	kworker/u16:5+events_unbound	09:24:50	5
1745300	99	39	36,2	cyclictest	1447748	-21	kworker/u16:5+flush-8:0	07:39:33	5
1745295	99	39	37,2	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	11:44:36	4
1745300	99	38	36,2	cyclictest	1966293	-21	kworker/u16:2+events_unbound	10:19:32	5
1745300	99	38	36,2	cyclictest	1865845	-21	kworker/u16:4+events_unbound	08:29:38	5
1745300	99	37	35,2	cyclictest	1828210	-21	kworker/u16:4+flush-8:0	07:54:41	5
1745300	99	37	34,2	cyclictest	2313685	-21	kworker/u16:1+flush-8:0	11:44:29	5
1745306	99	36	30,5	cyclictest	1787859	-21	latency_hist	07:29:15	7
1745300	99	36	33,2	cyclictest	2177413	-21	kworker/u16:1+events_unbound	10:34:17	5
1745300	99	35	33,2	cyclictest	1934620	-21	kworker/u16:4+events_unbound	09:14:33	5
1745300	99	34	32,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	10:49:45	5
1745300	99	34	32,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	10:49:45	5
1745300	99	34	32,2	cyclictest	2092537	-21	kworker/u16:0+events_unbound	10:44:38	5
1745300	99	34	32,2	cyclictest	2092537	-21	kworker/u16:0+events_unbound	10:39:49	5
1745300	99	34	32,2	cyclictest	2019224	-21	kworker/u16:0+events_unbound	09:39:49	5
1745306	99	33	28,4	cyclictest	2215156	-21	latency_hist	10:44:14	7
1745300	99	33	31,2	cyclictest	1966293	-21	kworker/u16:2+flush-8:0	09:54:40	5
1745300	99	33	30,2	cyclictest	2249849	-21	kworker/u16:1+flush-8:0	11:09:36	5
1745295	99	33	31,2	cyclictest	2005862	-21	kworker/u16:5+events_unbound	09:18:25	4
1745300	99	32	30,2	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	11:19:32	5
1745300	99	32	30,2	cyclictest	2092537	-21	kworker/u16:0+events_unbound	10:33:05	5
1745300	99	31	29,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	11:54:28	5
1745300	99	31	29,2	cyclictest	2150380	-21	kworker/u16:3+events_unbound	12:04:32	5
1745300	99	31	29,2	cyclictest	1966293	-21	kworker/u16:2+flush-8:0	09:20:45	5
1745300	99	31	28,2	cyclictest	2150380	-21	kworker/u16:3+flush-8:0	12:19:16	5
1745300	99	31	28,2	cyclictest	1934620	-21	kworker/u16:4+flush-8:0	09:09:29	5
1745300	99	31	25,5	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	12:14:14	5
1745300	99	31	25,5	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	12:14:14	5
1951952	2	30	0,1	chrt	0	-21	swapper/4	08:49:45	4
1951952	2	30	0,1	chrt	0	-21	swapper/4	08:49:45	4
1745306	99	30	26,3	cyclictest	125	-21	kswapd0	09:18:10	7
1745300	99	30	28,2	cyclictest	1966293	-21	kworker/u16:2+events_unbound	09:45:24	5
1745300	99	30	28,2	cyclictest	1845761	-21	kworker/u16:1+events_unbound	09:53:05	5
1745300	99	29	27,2	cyclictest	2262336	-21	kworker/u16:0+flush-8:0	11:24:29	5
1745300	99	29	27,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	11:17:56	5
1745300	99	29	27,2	cyclictest	2068036	-21	kworker/u16:4+events_unbound	10:01:00	5
1745300	99	29	27,2	cyclictest	1934620	-21	kworker/u16:4+flush-8:0	09:04:32	5
1745306	99	28	23,4	cyclictest	648	-21	systemd-journal	09:39:09	7
1745306	99	28	0,26	cyclictest	2153810	-21	latency_hist	10:19:15	7
1745300	99	28	26,2	cyclictest	2447598	-21	kworker/u16:0+events_unbound	12:36:12	5
1745300	99	28	25,2	cyclictest	1797961	-21	kworker/u16:3+flush-8:0	08:14:32	5
1745295	99	28	24,3	cyclictest	2092537	-21	kworker/u16:0+flush-8:0	10:49:40	4
1745295	99	28	24,3	cyclictest	2092537	-21	kworker/u16:0+flush-8:0	10:49:40	4
1744701	2	28	4,8	sleep6	0	-21	swapper/6	07:04:59	6
1745302	99	27	23,3	cyclictest	1845761	-21	kworker/u16:1+flush-8:0	08:44:45	6
1745302	99	27	21,5	cyclictest	2005862	-21	kworker/u16:5+flush-8:0	09:18:21	6
1745300	99	27	25,2	cyclictest	2423534	-21	kworker/u16:5+flush-8:0	12:25:08	5
1745300	99	27	25,2	cyclictest	2262336	-21	kworker/u16:0+events_unbound	11:05:37	5
1745300	99	27	25,2	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	11:00:56	5
1745300	99	27	25,2	cyclictest	2202963	-21	kworker/u16:2+events_unbound	11:51:56	5
1745300	99	27	25,2	cyclictest	2150380	-21	kworker/u16:3+events_unbound	10:27:05	5
1745300	99	26	24,2	cyclictest	2202963	-21	kworker/u16:2+flush-8:0	12:14:32	5
1745300	99	25	22,2	cyclictest	1915006	-21	kworker/u16:2+events_unbound	08:44:17	5
1745302	99	23	21,2	cyclictest	2092537	-21	kworker/u16:0+flush-8:0	10:34:40	6
1745300	99	23	21,2	cyclictest	2313685	-21	kworker/u16:1+flush-8:0	11:35:08	5
1745306	99	22	21,0	cyclictest	0	-21	swapper/7	09:50:24	7
1745306	99	22	17,4	cyclictest	2410879	-21	latency_hist	12:04:14	7
1745306	99	22	16,5	cyclictest	1855766	-21	latency_hist	08:04:15	7
1745300	99	22	20,2	cyclictest	2407855	-21	kworker/u16:1+events_unbound	12:01:09	5
1745300	99	22	20,2	cyclictest	1865845	-21	kworker/u16:4+flush-8:0	08:23:25	5
1745300	99	22	20,2	cyclictest	1768797	-21	kworker/u16:1+events_unbound	07:37:25	5
2391185	2	21	0,0	sleep6	0	-21	swapper/6	11:54:36	6
1745306	99	21	16,4	cyclictest	125	-21	kswapd0	11:29:14	7
1745306	99	21	0,19	cyclictest	648	-21	systemd-journal	10:34:15	7
1745300	99	21	19,2	cyclictest	2249849	-21	kworker/u16:1+events_unbound	10:56:49	5
1745300	99	21	19,2	cyclictest	1845761	-21	kworker/u16:1+events_unbound	08:59:34	5
1745300	99	21	18,2	cyclictest	1934620	-21	kworker/u16:4+flush-8:0	08:54:32	5
1745300	99	21	18,2	cyclictest	1797961	-21	kworker/u16:3+events_unbound	07:44:33	5
1745306	99	20	15,4	cyclictest	1981922	-21	latency_hist	09:09:15	7
1745300	99	19	17,2	cyclictest	1845761	-21	kworker/u16:1+events_unbound	08:27:25	5
1745300	99	19	16,2	cyclictest	1744800	-21	kworker/u16:0+flush-8:0	07:19:25	5
1745306	99	18	11,6	cyclictest	1884885	-21	latency_hist	08:19:15	7
1745295	99	18	16,2	cyclictest	1797961	-21	kworker/u16:3+events_unbound	07:53:25	4
1745295	99	18	16,2	cyclictest	1447748	-21	kworker/u16:5+flush-8:0	07:34:49	4
1745306	99	17	14,2	cyclictest	0	-21	swapper/7	12:09:46	7
1745306	99	17	14,2	cyclictest	0	-21	swapper/7	12:09:46	7
1745300	99	17	14,3	cyclictest	1447748	-21	kworker/u16:5+flush-8:0	07:09:41	5
1745295	99	17	15,2	cyclictest	1934620	-21	kworker/u16:4+flush-8:0	09:05:22	4
1745306	99	16	5,5	cyclictest	5741	-21	ssh-agent	08:34:31	7
1745306	99	15	5,5	cyclictest	6233	-21	gvfs-afc-volume	08:24:47	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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