OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat Apr 25, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1806840	99	76	72,3	cyclictest	1801436	-21	kworker/u8:2+events_unbound	07:10:03	2
1806840	99	56	53,2	cyclictest	75	-21	kswapd0	07:10:01	2
1806837	99	45	40,3	cyclictest	2091492	-21	apt-get	11:45:12	1
1806832	99	44	38,4	cyclictest	1957023	-21	latency_hist	09:35:01	0
1806837	99	42	37,3	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	11:05:19	1
1806832	99	41	38,2	cyclictest	2138375	-21	kworker/u8:3+events_unbound	12:35:22	0
1806832	99	41	37,3	cyclictest	252	-21	systemd-journal	10:19:59	0
1806840	99	39	33,4	cyclictest	2096392	-21	latency_hist	11:50:01	2
1806832	99	37	30,5	cyclictest	1936914	-21	diskstats	09:15:14	0
1806840	99	36	30,4	cyclictest	2060013	-21	latency_hist	11:15:00	2
1806845	99	35	28,5	cyclictest	2096655	-21	apt-get	11:50:13	3
1806845	99	33	24,6	cyclictest	1915446	-21	latency_hist	08:55:01	3
1806840	99	33	29,3	cyclictest	2039603	-21	/usr/sbin/munin	10:55:14	2
1806840	99	33	29,3	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	11:45:00	2
1806840	99	33	29,3	cyclictest	1879323	-21	kworker/u8:2+events_unbound	11:05:17	2
1806840	99	33	28,3	cyclictest	1962400	-21	/usr/sbin/munin	09:40:15	2
1806832	99	33	29,3	cyclictest	1936108	-21	kworker/u8:4+flush-259:0	10:00:20	0
1806845	99	32	28,3	cyclictest	75	-21	kswapd0	07:10:01	3
1806840	99	32	29,2	cyclictest	1998072	-21	kworker/u8:0+events_unbound	11:25:18	2
1806840	99	32	28,3	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	10:15:00	2
1806840	99	31	28,2	cyclictest	2102511	-21	kworker/u8:1+events_unbound	11:55:22	2
1806837	99	31	25,4	cyclictest	1895035	-21	kworker/u8:4+flush-259:0	08:50:16	1
1806837	99	31	24,5	cyclictest	1930043	-21	ntpq	09:05:23	1
1806832	99	31	27,3	cyclictest	509	-21	rs:main		0
1806832	99	31	25,5	cyclictest	1924871	-21	ntpq	09:00:22	0
1806840	99	30	24,4	cyclictest	2024177	-21	/usr/sbin/munin	10:40:15	2
1806837	99	30	26,3	cyclictest	1879323	-21	kworker/u8:2+events_unbound	10:45:13	1
1806837	99	30	25,4	cyclictest	252	-21	systemd-journal	12:05:01	1
1806837	99	30	25,4	cyclictest	2133608	-21	apt-get	12:25:13	1
1806837	99	30	25,3	cyclictest	1983069	-21	apt-get	10:00:11	1
1806832	99	30	27,2	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	10:30:14	0
1806832	99	30	27,2	cyclictest	1812185	-21	kworker/u8:0+events_unbound	08:05:33	0
1806832	99	30	26,3	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	10:40:24	0
1806832	99	30	26,3	cyclictest	1925813	-21	kworker/u8:3+events_unbound	09:10:14	0
1806832	99	30	25,3	cyclictest	252	-21	systemd-journal	07:38:33	0
1806837	99	29	26,2	cyclictest	1936108	-21	kworker/u8:4+events_unbound	09:20:02	1
1806837	99	29	25,3	cyclictest	2091272	-21	kworker/u8:3+flush-259:0	11:50:16	1
1806832	99	29	25,3	cyclictest	1925813	-21	kworker/u8:3+flush-259:0	09:06:32	0
1806832	99	29	25,3	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	08:35:27	0
1806840	99	28	25,2	cyclictest	1998072	-21	kworker/u8:0+events_unbound	10:55:01	2
1806840	99	28	25,2	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	09:55:26	2
1806837	99	28	24,3	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	11:15:19	1
1806837	99	28	22,4	cyclictest	1863833	-21	latency_hist	08:05:00	1
1806832	99	28	1,25	cyclictest	1	-21	systemd	11:24:33	0
1806845	99	27	22,4	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	11:00:21	3
1806840	99	27	25,2	cyclictest	1936108	-21	kworker/u8:4+flush-259:0	10:00:21	2
1806840	99	27	24,2	cyclictest	1936107	-21	kworker/u8:0+flush-259:0	09:25:20	2
1806840	99	27	24,2	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	11:25:01	2
1806840	99	27	24,2	cyclictest	1879323	-21	kworker/u8:2+events_unbound	09:45:22	2
1806840	99	27	23,3	cyclictest	1998072	-21	kworker/u8:0+events_unbound	10:30:22	2
1806840	99	27	23,3	cyclictest	1936108	-21	kworker/u8:4+flush-259:0	09:35:14	2
1806840	99	27	21,4	cyclictest	252	-21	systemd-journal	08:00:00	2
1806832	99	27	23,3	cyclictest	2091272	-21	kworker/u8:3+events_unbound	11:50:22	0
1806832	99	27	23,3	cyclictest	1998072	-21	kworker/u8:0+events_unbound	11:35:21	0
1806832	99	27	23,3	cyclictest	1998072	-21	kworker/u8:0+events_unbound	10:50:20	0
1806832	99	27	22,4	cyclictest	1874147	-21	latency_hist	08:15:01	0
1806832	99	27	22,4	cyclictest	1874147	-21	latency_hist	08:15:00	0
1806840	99	26	22,3	cyclictest	1879323	-21	kworker/u8:2+events_unbound	10:15:17	2
1806837	99	26	22,3	cyclictest	2091272	-21	kworker/u8:3+events_unbound	11:55:21	1
1806837	99	26	22,3	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	10:25:17	1
1806837	99	26	20,5	cyclictest	1972479	-21	latency_hist	09:50:00	1
1806837	99	26	20,4	cyclictest	2086376	-21	apt-get	11:40:11	1
1806832	99	26	22,3	cyclictest	2102511	-21	kworker/u8:1+events_unbound	12:10:22	0
1806832	99	26	20,4	cyclictest	2102157	-21	base64	11:55:02	0
1806845	99	25	14,10	cyclictest	1801436	-21	kworker/u8:2+flush-259:0	07:35:00	3
1806840	99	25	23,2	cyclictest	1795448	-21	kworker/u8:1+events_unbound	07:15:23	2
1806840	99	25	22,2	cyclictest	1869005	-21	kworker/u8:1+flush-259:0	08:15:20	2
1806840	99	25	22,2	cyclictest	1812185	-21	kworker/u8:0+events_unbound	07:36:33	2
1806840	99	25	21,3	cyclictest	2060275	-21	apt-get	11:15:13	2
1806840	99	25	19,4	cyclictest	2013642	-21	latency_hist	10:30:01	2
1806837	99	25	19,4	cyclictest	1935168	-21	ntpq	09:10:21	1
1806837	99	25	19,4	cyclictest	1879516	-21	/usr/sbin/munin	08:20:17	1
1806832	99	25	21,3	cyclictest	1936107	-21	kworker/u8:0+flush-259:0	09:40:17	0
1806832	99	25	21,3	cyclictest	1936107	-21	kworker/u8:0+events_unbound	09:20:13	0
1806832	99	25	21,3	cyclictest	1879323	-21	kworker/u8:2+events_unbound	10:05:13	0
1806832	99	25	21,3	cyclictest	1801436	-21	kworker/u8:2+events_unbound	07:30:18	0
1806845	99	24	19,4	cyclictest	1879323	-21	kworker/u8:2+flush-259:0	10:50:00	3
1806845	99	24	19,3	cyclictest	1925813	-21	kworker/u8:3+flush-259:0	09:10:20	3
1806845	99	24	18,4	cyclictest	1894809	-21	latency_hist	08:35:00	3
1806840	99	24	21,2	cyclictest	2102511	-21	kworker/u8:1+flush-259:0	12:05:21	2
1806840	99	24	21,2	cyclictest	1812185	-21	kworker/u8:0+events_unbound	08:10:15	2
1806840	99	24	21,2	cyclictest	1812185	-21	kworker/u8:0+events_unbound	08:10:15	2
1806840	99	24	20,3	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	11:00:25	2
1806837	99	24	20,3	cyclictest	1936107	-21	kworker/u8:0+flush-259:0	09:30:00	1
1806837	99	24	20,3	cyclictest	1838015	-21	kworker/u8:3+events_unbound	08:25:23	1
1806837	99	24	19,4	cyclictest	252	-21	systemd-journal	07:20:01	1
1806832	99	24	20,3	cyclictest	1838015	-21	kworker/u8:3+events_unbound	08:25:17	0
1806840	99	23	19,3	cyclictest	1998072	-21	kworker/u8:0+flush-259:0	10:20:54	2
1806840	99	23	17,4	cyclictest	252	-21	systemd-journal	07:34:59	2
1806837	99	23	19,3	cyclictest	2128204	-21	kworker/u8:1+flush-259:0	12:30:20	1
1806837	99	23	18,3	cyclictest	1874380	-21	/usr/sbin/munin	08:15:14	1
1806832	99	23	20,2	cyclictest	1998072	-21	kworker/u8:0+events_unbound	11:15:24	0
1806832	99	23	19,3	cyclictest	1900267	-21	apt-get	08:40:11	0
1806832	99	23	19,3	cyclictest	1879323	-21	kworker/u8:2+events_unbound	10:25:15	0
1806832	99	23	18,4	cyclictest	2106726	-21	kworker/u8:4+events_unbound	12:08:34	0
1806845	99	22	14,6	cyclictest	1895044	-21	/usr/sbin/munin	08:35:14	3
1806845	99	22	14,5	cyclictest	1817341	-21	latency_hist	07:20:01	3
1806840	99	22	19,2	cyclictest	2122656	-21	kworker/u8:2+flush-259:0	12:20:00	2
1806840	99	22	19,2	cyclictest	1838015	-21	kworker/u8:3+events_unbound	08:30:21	2
1806840	99	22	18,3	cyclictest	2128204	-21	kworker/u8:1+events_unbound	12:24:35	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34