OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, 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.

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 rackbslot2.osadl.org (updated Sun Nov 30, 2025 12:44:39)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2035016	2	233	180,18	sleep1	0	-21	swapper/1	07:09:17	1
2034937	2	227	175,43	sleep3	0	-21	swapper/3	07:08:13	3
2034944	2	225	195,20	sleep0	0	-21	swapper/0	07:08:19	0
2034688	2	222	192,20	sleep2	0	-21	swapper/2	07:05:32	2
2035398	99	63	47,14	cyclictest	2117808	-21	snmp_wanswitch.	08:45:00	2
2035401	99	62	56,4	cyclictest	2066048	-21	latency_hist	07:45:01	3
2035401	99	57	50,4	cyclictest	2221483	-21	snmp_wanswitch.	10:45:01	3
2035398	99	52	49,2	cyclictest	2091668	-21	kworker/u8:3+events_unbound	08:35:16	2
2035398	99	51	46,3	cyclictest	2053251	-21	kworker/u8:2+events_unbound	08:20:15	2
2035401	99	50	45,3	cyclictest	2036893	-21	apt-get	07:10:07	3
2035398	99	50	47,2	cyclictest	2243519	-21	kworker/u8:4+events_unbound	11:10:15	2
2035397	99	50	41,8	cyclictest	2091668	-21	kworker/u8:3+flush-179:0	08:55:06	1
2035393	99	50	44,4	cyclictest	2066334	-21	CacheThread_Blo	07:45:00	0
2035398	99	49	46,2	cyclictest	2183266	-21	kworker/u8:2+flush-179:0	11:50:06	2
2035393	99	49	43,4	cyclictest	2066269	-21	chrome	07:45:01	0
2035398	99	48	44,3	cyclictest	2057357	-21	kworker/u8:4+flush-179:0	07:40:11	2
2035393	99	47	33,13	cyclictest	2013346	-1	kworker/0:2H+kblockd	11:53:01	0
2113677	2	46	0,1	chrt	2113670	-21	ntp_states	08:40:03	3
2035398	99	46	43,2	cyclictest	2212317	-21	kworker/u8:1+flush-179:0	11:00:06	2
2035398	99	46	43,2	cyclictest	2156132	-21	kworker/u8:3+events_unbound	10:05:14	2
2035398	99	46	43,2	cyclictest	2139033	-21	kworker/u8:2+flush-179:0	09:35:15	2
2035393	99	46	42,3	cyclictest	2117805	-21	Chrome_ChildIOT	08:45:07	0
2035401	99	45	41,3	cyclictest	2265861	-21	cat	11:35:12	3
2035398	99	45	42,2	cyclictest	2302644	-21	kworker/u8:1+flush-179:0	12:25:28	2
2035398	99	45	42,2	cyclictest	2183266	-21	kworker/u8:2+events_unbound	11:25:14	2
2035397	99	45	32,12	cyclictest	2017781	-1	kworker/1:1H+kblockd	07:48:17	1
2035398	99	44	41,2	cyclictest	2173498	-21	kworker/u8:1+flush-179:0	10:00:15	2
2035398	99	44	37,5	cyclictest	2217130	-21	/usr/share/muni	10:40:08	2
2035398	99	44	36,3	cyclictest	2156132	-21	kworker/u8:3+events_unbound	09:50:15	2
2035398	99	43	40,2	cyclictest	2266945	-21	kworker/u8:3+events_unbound	11:40:16	2
2035398	99	43	38,3	cyclictest	2156132	-21	kworker/u8:3+events_unbound	10:35:09	2
2035397	99	43	39,2	cyclictest	2221447	-21	exe	10:45:01	1
2035398	99	42	39,2	cyclictest	2156132	-21	kworker/u8:3+flush-179:0	10:30:12	2
2035398	99	42	39,2	cyclictest	2053251	-21	kworker/u8:2+events_unbound	07:45:26	2
2035393	99	42	36,4	cyclictest	2221446	-21	chrome	10:45:01	0
2035401	99	41	36,3	cyclictest	2121952	-21	latency_hist	08:50:00	3
2035398	99	41	38,2	cyclictest	2272670	-21	kworker/u8:1+events_unbound	12:05:26	2
2035398	99	41	38,2	cyclictest	2272670	-21	kworker/u8:1+events_unbound	12:05:26	2
2035398	99	41	37,2	cyclictest	2212568	-21	kworker/2:0+pm	11:05:03	2
2035397	99	41	37,3	cyclictest	2265860	-21	cat	11:35:12	1
2035401	99	40	36,3	cyclictest	2057357	-21	kworker/u8:4+events_unbound	07:55:15	3
2035398	99	40	37,2	cyclictest	2260994	-21	kworker/2:2+pm	12:00:40	2
2035398	99	40	37,2	cyclictest	2053251	-21	kworker/u8:2+events_unbound	08:30:07	2
2035398	99	40	23,15	cyclictest	2221471	-21	/usr/share/muni	10:45:02	2
2035398	99	40	1,6	cyclictest	2039818	-21	munin-node	07:15:05	2
2035393	99	40	38,1	cyclictest	2013346	-1	kworker/0:2H+kblockd	12:36:57	0
2035393	99	40	36,3	cyclictest	2221157	-21	latency_hist	10:45:01	0
2035401	99	39	35,3	cyclictest	2303306	-21	/usr/share/muni	12:20:13	3
2035401	99	39	33,5	cyclictest	2294372	-21	/usr/share/muni	12:10:14	3
2035401	99	39	28,10	cyclictest	1318	-21	snmpd	07:37:28	3
2035398	99	39	37,1	cyclictest	2030957	-21	kworker/2:0+pm	08:57:27	2
2035398	99	39	37,1	cyclictest	2030957	-21	kworker/2:0+pm	08:52:53	2
2035398	99	39	36,2	cyclictest	2189316	-21	kworker/u8:0+events_unbound	10:10:15	2
2035398	99	39	36,2	cyclictest	2156472	-21	kworker/2:1+pm	09:42:38	2
2035398	99	39	35,3	cyclictest	2139033	-21	kworker/u8:2+events_unbound	09:45:21	2
2035398	99	39	35,2	cyclictest	2156472	-21	kworker/2:1+pm	10:20:38	2
2035397	99	39	22,16	cyclictest	2268328	-21	munin-update	11:40:26	1
2035401	99	38	36,1	cyclictest	2119270	-21	kworker/3:2+pm	11:16:55	3
2035401	99	38	36,1	cyclictest	2070199	-21	kworker/3:0+pm	08:25:22	3
2035401	99	38	35,2	cyclictest	2212317	-21	kworker/u8:1+events_unbound	11:00:00	3
2035401	99	38	35,2	cyclictest	2156132	-21	kworker/u8:3+flush-179:0	10:35:06	3
2035401	99	38	34,3	cyclictest	2302644	-21	kworker/u8:1+events_unbound	12:30:03	3
2035398	99	38	36,1	cyclictest	2260994	-21	kworker/2:2+pm	12:20:27	2
2035398	99	38	36,1	cyclictest	2212568	-21	kworker/2:0+pm	10:55:29	2
2035398	99	38	36,1	cyclictest	2156472	-21	kworker/2:1+pm	09:30:27	2
2035398	99	38	35,2	cyclictest	2260994	-21	kworker/2:2+pm	12:15:28	2
2035398	99	38	35,2	cyclictest	2260994	-21	kworker/2:2+pm	11:55:01	2
2035398	99	38	35,2	cyclictest	2212568	-21	kworker/2:0+pm	11:15:29	2
2035398	99	38	35,2	cyclictest	2183266	-21	kworker/u8:2+events_unbound	11:20:32	2
2035398	99	38	35,2	cyclictest	2156472	-21	kworker/2:1+pm	09:57:09	2
2035398	99	38	35,2	cyclictest	2139005	-21	kworker/2:0+pm	09:17:31	2
2035398	99	38	35,2	cyclictest	2130254	-21	kworker/2:2+pm	09:00:03	2
2035398	99	38	35,2	cyclictest	2057357	-21	kworker/u8:4+events_unbound	08:15:04	2
2035398	99	38	35,2	cyclictest	2030957	-21	kworker/2:0+pm	08:03:02	2
2035398	99	38	34,3	cyclictest	2053251	-21	kworker/u8:2+events_unbound	08:40:02	2
2035398	99	38	34,2	cyclictest	2030957	-21	kworker/2:0+pm	08:10:12	2
2035398	99	38	34,2	cyclictest	2030957	-21	kworker/2:0+pm	08:10:12	2
2035398	99	38	34,2	cyclictest	1689870	-1	kworker/2:1H+kblockd	12:30:03	2
2035398	99	38	31,2	cyclictest	2139033	-21	kworker/u8:2+events_unbound	09:20:09	2
2035393	99	38	35,2	cyclictest	2013346	-1	kworker/0:2H+kblockd	11:27:25	0
2035393	99	38	34,3	cyclictest	2233548	-31	munin-html	10:55:30	0
2035401	99	37	0,36	cyclictest	0	-21	swapper/3	10:51:54	3
2035398	99	37	35,1	cyclictest	2130254	-21	kworker/2:2+pm	09:10:32	2
2035398	99	37	34,2	cyclictest	2030957	-21	kworker/2:0+pm	07:29:59	2
2035398	99	37	33,3	cyclictest	2243519	-21	kworker/u8:4+flush-179:0	11:30:20	2
2035398	99	37	33,3	cyclictest	2139005	-21	kworker/2:0+pm	09:25:04	2
2035398	99	37	33,2	cyclictest	1689870	-1	kworker/2:1H+kblockd	08:27:34	2
2035397	99	37	36,1	cyclictest	2017781	-1	kworker/1:1H+kblockd	11:26:14	1
2035397	99	37	34,2	cyclictest	2017781	-1	kworker/1:1H+kblockd	12:23:26	1
2035397	99	37	34,2	cyclictest	2017781	-1	kworker/1:1H+kblockd	09:18:36	1
2035393	99	37	34,2	cyclictest	2134795	-21	kworker/0:2+pm	09:15:09	0
2035393	99	37	34,2	cyclictest	2013346	-1	kworker/0:2H+kblockd	12:12:53	0
2035393	99	37	34,2	cyclictest	2013346	-1	kworker/0:2H+kblockd	09:27:03	0
2035393	99	37	34,2	cyclictest	2013346	-1	kworker/0:2H+kblockd	08:45:00	0
2035393	99	37	33,2	cyclictest	2013346	-1	kworker/0:2H+kblockd	07:35:16	0
2035393	99	37	32,4	cyclictest	2178530	-21	ntpq	09:55:04	0
2139412	2	36	0,1	chrt	2139395	-21	snmp_wlanswitch	09:10:03	1
2035401	99	36	34,1	cyclictest	1720299	-1	kworker/3:2H+kblockd	11:47:02	3
2035401	99	36	34,1	cyclictest	1720299	-1	kworker/3:2H+kblockd	09:51:25	3
2035401	99	36	34,1	cyclictest	1720299	-1	kworker/3:2H+kblockd	08:14:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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