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 Sun Jun 28, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1658209	99	53	49,3	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	23:00:00	3
1658209	99	51	49,1	cyclictest	1683816	-21	fwupd	19:33:21	3
1658199	99	48	42,4	cyclictest	1987016	-21	latency_hist	00:25:00	0
1658199	99	48	42,4	cyclictest	1987016	-21	latency_hist	00:25:00	0
1658205	99	45	39,4	cyclictest	1940104	-21	latency_hist	23:40:00	2
1658205	99	44	40,3	cyclictest	1678826	-21	kworker/u8:1+events_unbound	19:33:21	2
1658209	99	43	40,2	cyclictest	1736865	-21	kworker/u8:3+events_unbound	21:10:01	3
1658203	99	43	29,12	cyclictest	1768297	-21	/usr/sbin/munin	20:55:14	1
1658209	99	41	38,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	22:24:59	3
1658209	99	41	38,2	cyclictest	1689152	-21	kworker/u8:4+events_unbound	20:10:00	3
1658209	99	38	32,4	cyclictest	1929859	-21	latency_hist	23:30:01	3
1658205	99	38	32,4	cyclictest	1981582	-21	cat	00:20:00	2
1658203	99	38	30,5	cyclictest	1882307	-21	latency_hist	22:45:01	1
1658205	99	37	31,4	cyclictest	1704728	-21	latency_hist	19:55:00	2
1658203	99	37	33,3	cyclictest	1903004	-21	kworker/u8:2+flush-259:0	23:18:14	1
1658209	99	34	31,2	cyclictest	1955798	-21	kworker/u8:2+flush-259:0	00:10:00	3
1658209	99	34	31,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	22:35:00	3
1658203	99	34	28,4	cyclictest	1892660	-21	gpgv	22:55:01	1
1658203	99	34	26,5	cyclictest	1840751	-21	latency_hist	22:05:01	1
1658205	99	33	29,3	cyclictest	1773275	-21	kworker/u8:0+flush-259:0	21:05:01	2
1658205	99	33	28,3	cyclictest	1668718	-21	/usr/sbin/munin	19:20:14	2
1658199	99	33	29,3	cyclictest	1856191	-21	kworker/u8:1+flush-259:0	22:30:14	0
1658205	99	32	29,2	cyclictest	1689152	-21	kworker/u8:4+flush-259:0	20:35:16	2
1658203	99	32	27,3	cyclictest	335557	-21	systemd-journal	22:30:01	1
1658209	99	31	28,2	cyclictest	1924718	-21	kworker/u8:4+flush-259:0	23:35:00	3
1658205	99	31	27,3	cyclictest	1903224	-21	gpgv	23:05:00	2
1658205	99	31	26,3	cyclictest	1898083	-21	latency_hist	23:00:01	2
1658203	99	31	25,4	cyclictest	1752862	-21	apt-get	20:40:12	1
1658199	99	31	28,2	cyclictest	1876971	-21	kworker/u8:3+flush-259:0	23:05:00	0
1658205	99	30	26,3	cyclictest	1861331	-21	gpgv	22:25:00	2
1658199	99	30	27,2	cyclictest	1736865	-21	kworker/u8:3+flush-259:0	21:05:01	0
1658199	99	30	24,4	cyclictest	335557	-21	systemd-journal	19:55:00	0
1658209	99	29	26,2	cyclictest	1689152	-21	kworker/u8:4+events_unbound	20:40:19	3
1658205	99	29	26,2	cyclictest	1778618	-21	kworker/u8:1+flush-259:0	21:48:35	2
1658199	99	29	23,4	cyclictest	335557	-21	systemd-journal	00:35:00	0
1658209	99	28	25,2	cyclictest	1689152	-21	kworker/u8:4+flush-259:0	20:15:21	3
1658205	99	28	25,2	cyclictest	1856191	-21	kworker/u8:1+flush-259:0	22:40:24	2
1658205	99	28	22,5	cyclictest	1747091	-21	cp	20:35:00	2
1658203	99	28	23,3	cyclictest	1778618	-21	kworker/u8:1+flush-259:0	21:25:18	1
1658203	99	28	22,4	cyclictest	1998068	-21	apt-get	00:35:12	1
1658203	99	28	22,4	cyclictest	1939915	-21	kworker/u8:0+flush-259:0	00:05:17	1
1658209	99	27	24,2	cyclictest	1903004	-21	kworker/u8:2+flush-259:0	23:10:20	3
1658209	99	27	24,2	cyclictest	1856191	-21	kworker/u8:1+flush-259:0	22:40:21	3
1658209	99	27	24,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	22:30:00	3
1658199	99	27	24,2	cyclictest	1815257	-21	apt-get	21:40:12	0
1658199	99	27	23,3	cyclictest	1876971	-21	kworker/u8:3+flush-259:0	23:05:15	0
1658209	99	26	22,3	cyclictest	1919740	-21	kworker/u8:1+flush-259:0	23:35:20	3
1658209	99	26	21,4	cyclictest	335557	-21	systemd-journal	20:50:00	3
1658205	99	26	23,2	cyclictest	1950636	-21	kworker/u8:1+flush-259:0	00:00:36	2
1658205	99	26	22,3	cyclictest	1924718	-21	kworker/u8:4+flush-259:0	23:25:24	2
1658205	99	26	21,3	cyclictest	1997378	-21	latency_hist	00:35:00	2
1658199	99	26	22,3	cyclictest	1939915	-21	kworker/u8:0+flush-259:0	23:55:17	0
1658209	99	25	22,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	22:10:20	3
1658209	99	25	20,4	cyclictest	335557	-21	systemd-journal	20:15:01	3
1658205	99	25	22,2	cyclictest	1919740	-21	kworker/u8:1+events_unbound	23:24:35	2
1658199	99	25	22,2	cyclictest	1987245	-21	kworker/u8:4+flush-259:0	00:35:18	0
1658199	99	25	22,2	cyclictest	1939915	-21	kworker/u8:0+flush-259:0	00:15:26	0
1658199	99	25	21,3	cyclictest	1710141	-21	apt-get	20:00:08	0
1658209	99	24	22,2	cyclictest	1987245	-21	kworker/u8:4+events_unbound	00:25:21	3
1658209	99	24	20,3	cyclictest	1678826	-21	kworker/u8:1+flush-259:0	19:45:21	3
1658205	99	24	21,2	cyclictest	1736865	-21	kworker/u8:3+events_unbound	20:45:23	2
1658199	99	24	21,2	cyclictest	1778618	-21	kworker/u8:1+events_unbound	21:32:44	0
1658199	99	24	20,3	cyclictest	335557	-21	systemd-journal	21:00:01	0
1658199	99	24	19,3	cyclictest	1825511	-21	apt-get	21:50:12	0
1658209	99	23	20,2	cyclictest	1663363	-21	kworker/u8:2+events_unbound	19:50:21	3
1658209	99	23	19,3	cyclictest	1845753	-21	kworker/u8:3+flush-259:0	22:15:10	3
1658209	99	23	19,3	cyclictest	1830695	-21	apt-get	21:55:11	3
1658205	99	23	19,3	cyclictest	1689152	-21	kworker/u8:4+events_unbound	19:40:17	2
1658203	99	23	17,4	cyclictest	1856191	-21	kworker/u8:1+flush-259:0	23:00:17	1
1658199	99	23	20,2	cyclictest	1778618	-21	kworker/u8:1+events_unbound	21:24:33	0
1658199	99	23	19,3	cyclictest	1736865	-21	kworker/u8:3+events_unbound	21:10:13	0
1658199	99	23	19,3	cyclictest	1736865	-21	kworker/u8:3+events_unbound	20:53:35	0
1658199	99	23	17,4	cyclictest	1683980	-21	latency_hist	19:35:00	0
1658209	99	22	19,2	cyclictest	1950636	-21	kworker/u8:1+flush-259:0	23:55:00	3
1658209	99	22	19,2	cyclictest	1876971	-21	kworker/u8:3+flush-259:0	23:40:21	3
1658209	99	22	18,3	cyclictest	1976528	-21	/usr/sbin/munin	00:15:16	3
1658209	99	22	17,4	cyclictest	1955832	-21	apt-get	23:55:12	3
1658209	99	22	16,4	cyclictest	1736634	-21	latency_hist	20:25:00	3
1658205	99	22	19,2	cyclictest	1987245	-21	kworker/u8:4+flush-259:0	00:25:15	2
1658205	99	22	19,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	21:27:38	2
1658205	99	22	18,3	cyclictest	1788770	-21	kworker/u8:0+events_unbound	21:42:47	2
1658203	99	22	16,4	cyclictest	335557	-21	systemd-journal	00:01:34	1
1658203	99	22	15,4	cyclictest	1699744	-21	/usr/sbin/munin	19:50:13	1
1658199	99	22	18,3	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	21:39:59	0
1658199	99	22	17,4	cyclictest	335557	-21	systemd-journal	20:06:35	0
1658199	99	22	17,4	cyclictest	335557	-21	systemd-journal	19:30:00	0
1658199	99	22	16,4	cyclictest	1924696	-21	latency_hist	23:25:01	0
1658199	99	22	16,4	cyclictest	1877144	-21	latency_hist	22:40:01	0
1658199	99	22	15,5	cyclictest	1762053	-21	ntpq	20:45:22	0
1658209	99	21	18,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	22:00:18	3
1658209	99	21	18,2	cyclictest	1788770	-21	kworker/u8:0+flush-259:0	21:50:23	3
1658209	99	21	18,2	cyclictest	1788770	-21	kworker/u8:0+events_unbound	23:08:35	3
1658209	99	21	17,3	cyclictest	1788770	-21	kworker/u8:0+events_unbound	23:15:15	3
1658205	99	21	18,2	cyclictest	1845753	-21	kworker/u8:3+events_unbound	22:15:22	2
1658205	99	21	17,3	cyclictest	1955798	-21	kworker/u8:2+flush-259:0	00:10:15	2
1658199	99	21	18,2	cyclictest	1940370	-21	apt-get	23:40:11	0
1658199	99	21	18,2	cyclictest	1924718	-21	kworker/u8:4+flush-259:0	23:50:00	0
1658199	99	21	18,2	cyclictest	1689152	-21	kworker/u8:4+events_unbound	20:15:22	0
1658199	99	21	17,3	cyclictest	1939915	-21	kworker/u8:0+events_unbound	00:00:14	0
1658199	99	21	17,3	cyclictest	1861420	-21	gpgv	22:25:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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