OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #1

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

Characteristics of the 100 highest latencies:

System rackbslot1.osadl.org (updated Tue Sep 16, 2025 12:44:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1671755	2	213	184,19	sleep1	0	-21	swapper/1	07:06:41	1
1671792	2	207	157,40	sleep3	0	-21	swapper/3	07:07:11	3
1671965	2	203	174,19	sleep2	0	-21	swapper/2	07:09:19	2
1671837	2	201	177,14	sleep0	0	-21	swapper/0	07:07:44	0
1672251	99	82	20,13	cyclictest	1771091	-21	snmp_wlanpowerc	08:45:01	3
1672243	99	72	8,56	cyclictest	1833200	-21	chrome	09:45:02	1
1672251	99	63	56,5	cyclictest	1857988	-31	munin-html	10:05:39	3
1672247	99	59	52,5	cyclictest	1689979	-21	apt-get	07:25:13	2
1672247	99	58	54,3	cyclictest	1812092	-21	kworker/u8:4+flush-179:0	09:50:20	2
1672247	99	55	51,3	cyclictest	1698392	-21	kworker/u8:3+flush-179:0	07:50:29	2
1672243	99	55	50,4	cyclictest	1895544	-21	chrome	10:45:01	1
1672243	99	54	50,3	cyclictest	1977639	-21	kworker/u8:2+flush-179:0	12:15:15	1
1672247	99	53	49,3	cyclictest	1797097	-21	kworker/u8:0+flush-179:0	09:30:27	2
1672247	99	52	48,3	cyclictest	1797097	-21	kworker/u8:0+flush-179:0	09:55:16	2
1672251	99	51	34,16	cyclictest	1801477	-1	kworker/3:2H+kblockd	11:40:29	3
1672247	99	51	49,2	cyclictest	1830478	-21	kworker/u8:2+events_unbound	11:10:31	2
1672247	99	51	47,3	cyclictest	1920734	-21	kworker/u8:1+events_unbound	11:50:14	2
1672251	99	50	46,3	cyclictest	1962428	-21	/usr/share/muni	11:50:09	3
1672247	99	50	47,2	cyclictest	1698392	-21	kworker/u8:3+flush-179:0	07:40:21	2
1672242	99	50	47,2	cyclictest	1698392	-21	kworker/u8:3+events_unbound	08:55:20	0
1672242	99	49	45,3	cyclictest	1657296	-21	kworker/u8:1+events_unbound	07:31:54	0
1672242	99	48	45,3	cyclictest	2003443	-21	kworker/u8:1+events_unbound	12:36:06	0
1672247	99	47	44,2	cyclictest	1698392	-21	kworker/u8:3+flush-179:0	08:10:28	2
1672247	99	47	42,4	cyclictest	1793497	-21	apt-get	09:05:14	2
1672243	99	47	40,5	cyclictest	1729812	-21	/usr/share/muni	08:05:02	1
1672242	99	47	44,2	cyclictest	1671742	-21	kworker/u8:2+events_unbound	07:35:18	0
1672242	99	47	43,3	cyclictest	247561	-21	ThreadPoolForeg	12:10:48	0
1672242	99	47	43,3	cyclictest	1719035	-21	kworker/u8:1+events_unbound	08:04:52	0
1672242	99	47	43,3	cyclictest	1671742	-21	kworker/u8:2+events_unbound	07:41:00	0
1672251	99	46	37,8	cyclictest	1783311	-21	apt-get	08:55:13	3
1672247	99	46	44,2	cyclictest	1966986	-21	kworker/u8:3+flush-179:0	12:35:20	2
1672247	99	46	41,2	cyclictest	1812092	-21	kworker/u8:4+events_unbound	09:35:10	2
1672243	99	46	42,3	cyclictest	1714243	-21	munin-update	07:50:31	1
1672242	99	46	43,3	cyclictest	1713856	-21	kworker/u8:0+events_unbound	07:57:10	0
1672242	99	46	43,2	cyclictest	1812092	-21	kworker/u8:4+events_unbound	09:50:18	0
1672251	99	45	11,2	cyclictest	247560	-21	ThreadPoolForeg	12:20:24	3
1672247	99	45	42,2	cyclictest	1966986	-21	kworker/u8:3+events_unbound	12:05:31	2
1672247	99	45	42,2	cyclictest	1858328	-21	kworker/u8:3+flush-179:0	10:10:29	2
1672247	99	45	41,3	cyclictest	1920734	-21	kworker/u8:1+events_unbound	11:45:11	2
1672242	99	45	42,3	cyclictest	1866805	-21	kworker/u8:4+events_unbound	11:15:00	0
1672242	99	45	40,4	cyclictest	1833191	-21	CacheThread_Blo	09:45:00	0
1672251	99	44	40,3	cyclictest	1260	-21	snmpd	09:38:22	3
1672251	99	44	39,4	cyclictest	1797097	-21	kworker/u8:0+flush-179:0	09:20:36	3
1672247	99	44	42,2	cyclictest	1920734	-21	kworker/u8:1+events_unbound	11:25:14	2
1672247	99	44	41,2	cyclictest	1966986	-21	kworker/u8:3+events_unbound	11:55:24	2
1672247	99	44	41,2	cyclictest	1713856	-21	kworker/u8:0+flush-179:0	08:20:27	2
1672247	99	44	32,11	cyclictest	1651400	-21	kworker/2:2+pm	07:34:10	2
1672247	99	44	29,14	cyclictest	1830478	-21	kworker/u8:2+events_unbound	10:35:19	2
1672243	99	44	37,5	cyclictest	1698899	-21	/usr/share/muni	07:35:02	1
1672242	99	44	41,2	cyclictest	1698392	-21	kworker/u8:3+events_unbound	08:53:02	0
1672242	99	44	40,3	cyclictest	1775812	-21	kworker/u8:2+events_unbound	09:08:24	0
1672242	99	44	38,5	cyclictest	1791596	-31	munin-html	09:00:57	0
1672251	99	43	39,3	cyclictest	1837816	-21	kworker/u8:1+flush-179:0	09:46:07	3
1672251	99	43	39,3	cyclictest	1657296	-21	kworker/u8:1+flush-179:0	07:27:24	3
1672251	99	43	29,13	cyclictest	1801477	-1	kworker/3:2H+kblockd	12:35:19	3
1672247	99	43	40,2	cyclictest	1866805	-21	kworker/u8:4+flush-179:0	11:00:05	2
1672247	99	43	28,14	cyclictest	1830478	-21	kworker/u8:2+events_unbound	10:21:49	2
1672243	99	43	39,3	cyclictest	2008348	-31	munin-graph	12:31:19	1
1672243	99	43	37,4	cyclictest	1998704	-21	/usr/share/muni	12:25:14	1
1672242	99	43	40,3	cyclictest	1830478	-21	kworker/u8:2+events_unbound	10:55:17	0
1672242	99	43	40,2	cyclictest	1930852	-21	kworker/u8:0+events_unbound	11:36:54	0
1672242	99	43	38,4	cyclictest	1930547	-31	munin-html	11:15:35	0
1672242	99	43	38,4	cyclictest	1698392	-21	kworker/u8:3+flush-179:0	08:41:10	0
1672242	99	43	28,14	cyclictest	1698392	-21	kworker/u8:3+events_unbound	08:49:53	0
1672251	99	42	1,2	cyclictest	247557	-21	chrome	10:20:56	3
1672247	99	42	40,2	cyclictest	1671742	-21	kworker/u8:2+flush-179:0	07:10:10	2
1672247	99	42	39,3	cyclictest	1698392	-21	kworker/u8:3+events_unbound	08:35:32	2
1672247	99	42	39,2	cyclictest	1988730	-21	kworker/u8:0+events_unbound	12:20:02	2
1672247	99	42	39,2	cyclictest	1920734	-21	kworker/u8:1+flush-179:0	12:00:17	2
1672247	99	42	39,2	cyclictest	1775812	-21	kworker/u8:2+flush-179:0	09:00:15	2
1672247	99	42	38,3	cyclictest	1754847	-21	kworker/u8:1+flush-179:0	08:40:19	2
1672243	99	42	39,2	cyclictest	1866805	-21	kworker/u8:4+flush-179:0	10:50:16	1
1672242	99	42	40,2	cyclictest	1797097	-21	kworker/u8:0+events_unbound	09:26:07	0
1672242	99	42	38,3	cyclictest	1866805	-21	kworker/u8:4+events_unbound	11:08:39	0
1672242	99	42	38,3	cyclictest	1718976	-31	munin-graph	07:50:58	0
1672251	99	41	38,2	cyclictest	1640587	-21	kworker/3:3+pm	07:51:43	3
1672247	99	41	39,2	cyclictest	1889418	-21	kworker/u8:0+flush-179:0	10:55:15	2
1672247	99	41	39,2	cyclictest	1744471	-21	kworker/u8:4+flush-179:0	08:25:12	2
1672247	99	41	39,2	cyclictest	1671742	-21	kworker/u8:2+flush-179:0	07:35:32	2
1672247	99	41	38,2	cyclictest	1920734	-21	kworker/u8:1+flush-179:0	11:21:08	2
1672247	99	41	38,2	cyclictest	1847622	-21	kworker/u8:1+flush-179:0	10:30:17	2
1672247	99	41	38,2	cyclictest	1713856	-21	kworker/u8:0+flush-179:0	08:54:49	2
1672247	99	41	38,2	cyclictest	1713856	-21	kworker/u8:0+events_unbound	08:55:16	2
1672247	99	41	37,2	cyclictest	1920734	-21	kworker/u8:1+flush-179:0	11:30:32	2
1672243	99	41	37,3	cyclictest	1704292	-21	kworker/u8:1+events_unbound	07:45:00	1
1672242	99	41	37,3	cyclictest	1982672	-21	kworker/u8:4+events_unbound	12:06:59	0
1672242	99	41	37,3	cyclictest	1920734	-21	kworker/u8:1+events_unbound	11:58:43	0
1672242	99	41	36,4	cyclictest	1830478	-21	kworker/u8:2+events_unbound	10:29:01	0
1672242	99	41	36,2	cyclictest	1830478	-21	kworker/u8:2+events_unbound	11:00:19	0
1672251	99	40	37,2	cyclictest	1260	-21	snmpd	09:29:52	3
1672251	99	40	16,2	cyclictest	247563	-13	Compositor	12:27:02	3
1672247	99	40	37,2	cyclictest	1988730	-21	kworker/u8:0+flush-179:0	12:25:12	2
1672247	99	40	37,2	cyclictest	1866805	-21	kworker/u8:4+events_unbound	10:40:17	2
1672247	99	40	37,2	cyclictest	1713856	-21	kworker/u8:0+events_unbound	08:00:04	2
1672247	99	40	34,3	cyclictest	1930852	-21	kworker/u8:0+events_unbound	11:35:09	2
1672243	99	40	38,1	cyclictest	1936496	-21	kworker/1:0+pm	11:53:43	1
1672242	99	40	38,2	cyclictest	1988730	-21	kworker/u8:0+events_unbound	12:17:01	0
1672242	99	40	38,2	cyclictest	1853185	-21	kworker/u8:0+events_unbound	10:07:09	0
1672242	99	40	37,3	cyclictest	1866805	-21	kworker/u8:4+events_unbound	10:48:39	0
1672242	99	40	37,3	cyclictest	1847622	-21	kworker/u8:1+events_unbound	09:57:25	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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