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 Mon Jul 27, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1670096	99	63	56,4	cyclictest	335557	-21	systemd-journal	07:35:00	1
1670096	99	61	54,5	cyclictest	1873705	-21	cat	10:25:01	1
1670093	99	48	42,4	cyclictest	335557	-21	systemd-journal	09:14:49	0
1670103	99	46	39,5	cyclictest	1957358	-21	latency_hist	11:45:01	3
1670096	99	46	41,3	cyclictest	3792832	-21	kworker/u8:1+flush-259:0	07:25:00	1
1670096	99	39	35,3	cyclictest	1930824	-21	kworker/u8:2+events_unbound	11:40:01	1
1670093	99	39	35,3	cyclictest	1701101	-21	kworker/u8:0+flush-259:0	07:50:00	0
1670099	99	37	33,3	cyclictest	1842148	-21	kworker/u8:0+flush-259:0	11:00:21	2
1670096	99	37	32,3	cyclictest	335557	-21	systemd-journal	08:50:48	1
1670093	99	36	30,4	cyclictest	1920530	-21	cp	11:10:00	0
1670096	99	35	31,3	cyclictest	1920559	-21	kworker/u8:3+events_unbound	11:22:48	1
1670096	99	35	30,4	cyclictest	1852853	-21	latency_hist	10:05:01	1
1670096	99	34	31,2	cyclictest	1972620	-21	kworker/u8:1+events_unbound	12:21:48	1
1670096	99	34	31,2	cyclictest	1842148	-21	kworker/u8:0+events_unbound	10:19:49	1
1670096	99	34	31,2	cyclictest	1842148	-21	kworker/u8:0+events_unbound	10:19:49	1
1670093	99	34	29,4	cyclictest	335557	-21	systemd-journal	09:29:48	0
1670096	99	33	30,2	cyclictest	1701101	-21	kworker/u8:0+events_unbound	08:00:24	1
1670103	99	32	25,5	cyclictest	1741955	-21	ntpq	08:15:19	3
1670096	99	32	28,3	cyclictest	1972620	-21	kworker/u8:1+events_unbound	12:30:18	1
1670096	99	32	27,3	cyclictest	1962785	-21	kworker/u8:4+flush-259:0	12:15:21	1
1670096	99	32	25,5	cyclictest	2003920	-21	latency_hist	12:30:01	1
1670099	99	31	26,4	cyclictest	1701313	-21	/usr/sbin/munin	07:40:15	2
1670096	99	31	27,3	cyclictest	1800546	-21	kworker/u8:4+events_unbound	09:55:49	1
1670103	99	30	23,5	cyclictest	1805003	-21	ntpq	09:15:21	3
1670099	99	30	25,4	cyclictest	335557	-21	systemd-journal	09:10:48	2
1670096	99	30	26,3	cyclictest	1930824	-21	kworker/u8:2+events_unbound	11:56:49	1
1670103	99	29	23,4	cyclictest	1998701	-21	latency_hist	12:25:00	3
1670099	99	29	25,3	cyclictest	1784653	-21	latency_hist	09:00:01	2
1670096	99	29	26,2	cyclictest	1930824	-21	kworker/u8:2+events_unbound	11:46:49	1
1670096	99	29	26,2	cyclictest	1800546	-21	kworker/u8:4+flush-259:0	09:20:21	1
1670096	99	29	25,3	cyclictest	1910060	-21	kworker/u8:1+events_unbound	11:15:14	1
1670096	99	29	24,4	cyclictest	1706906	-21	kworker/u8:4+flush-259:0	08:30:00	1
1670093	99	29	24,4	cyclictest	1946592	-21	apt-get	11:35:01	0
1670093	99	29	24,3	cyclictest	335557	-21	systemd-journal	12:00:13	0
1670093	99	29	22,5	cyclictest	335557	-21	systemd-journal	11:15:00	0
1670103	99	28	24,3	cyclictest	1920370	-21	gpgv	11:10:00	3
1670103	99	28	21,5	cyclictest	1878257	-21	ntpq	10:25:25	3
1670103	99	28	21,4	cyclictest	335557	-21	systemd-journal	11:35:02	3
1670096	99	28	25,2	cyclictest	1853089	-21	kworker/u8:2+events_unbound	10:45:13	1
1670096	99	28	24,3	cyclictest	1853089	-21	kworker/u8:2+events_unbound	10:10:14	1
1670096	99	28	24,3	cyclictest	1758045	-21	kworker/u8:2+flush-259:0	09:10:00	1
1670096	99	28	24,3	cyclictest	1632663	-21	kworker/u8:0+events_unbound	07:14:27	1
1670093	99	28	22,4	cyclictest	1847307	-21	gpgv	10:00:00	0
1670103	99	27	20,5	cyclictest	1983210	-21	latency_hist	12:10:01	3
1670099	99	27	23,3	cyclictest	1832040	-21	apt-get	09:45:13	2
1670099	99	27	21,4	cyclictest	1690767	-21	latency_hist	07:30:00	2
1670096	99	27	24,2	cyclictest	1732474	-21	kworker/u8:1+events_unbound	08:15:13	1
1670096	99	27	24,2	cyclictest	1701101	-21	kworker/u8:0+flush-259:0	09:00:49	1
1670096	99	27	23,3	cyclictest	1930824	-21	kworker/u8:2+events_unbound	11:40:49	1
1670096	99	27	23,3	cyclictest	1805910	-21	kworker/u8:2+events_unbound	09:47:50	1
1670096	99	27	23,3	cyclictest	1701101	-21	kworker/u8:0+events_unbound	09:11:48	1
1670096	99	27	21,4	cyclictest	335557	-21	systemd-journal	09:30:48	1
1670093	99	27	23,3	cyclictest	1988655	-21	apt-get	12:15:13	0
1670103	99	26	21,3	cyclictest	1706906	-21	kworker/u8:4+flush-259:0	08:05:00	3
1670096	99	26	23,2	cyclictest	1962785	-21	kworker/u8:4+events_unbound	12:03:51	1
1670096	99	26	23,2	cyclictest	1701101	-21	kworker/u8:0+events_unbound	08:57:50	1
1670096	99	26	21,4	cyclictest	1701101	-21	kworker/u8:0+events_unbound	09:26:49	1
1670093	99	26	20,4	cyclictest	1931082	-21	latency_hist	11:20:02	0
1670093	99	26	18,6	cyclictest	335557	-21	systemd-journal	09:55:00	0
1670096	99	25	22,2	cyclictest	1670055	-21	kworker/u8:2+events_unbound	07:19:27	1
1670096	99	25	21,3	cyclictest	1842148	-21	kworker/u8:0+events_unbound	11:00:12	1
1670093	99	25	20,3	cyclictest	335557	-21	systemd-journal	08:54:54	0
1670103	99	24	21,2	cyclictest	1920559	-21	kworker/u8:3+flush-259:0	11:15:22	3
1670103	99	24	20,3	cyclictest	335557	-21	systemd-journal	10:46:48	3
1670103	99	24	16,6	cyclictest	1695942	-21	latency_hist	07:35:00	3
1670103	99	23	19,3	cyclictest	1774563	-21	/usr/sbin/munin	08:50:14	3
1670103	99	23	17,4	cyclictest	1711881	-21	latency_hist	07:50:01	3
1670099	99	23	18,4	cyclictest	1795421	-21	latency_hist	09:10:02	2
1670096	99	23	20,2	cyclictest	1837189	-21	apt-get	09:50:09	1
1670096	99	23	19,3	cyclictest	1910060	-21	kworker/u8:1+events_unbound	11:14:49	1
1670093	99	23	18,3	cyclictest	1889709	-21	apt-get	10:40:12	0
1670099	99	22	16,4	cyclictest	335557	-21	systemd-journal	10:05:48	2
1670099	99	22	16,4	cyclictest	1826600	-21	latency_hist	09:40:00	2
1670099	99	22	15,5	cyclictest	1909177	-21	ntpq	10:55:23	2
1670096	99	22	19,2	cyclictest	1930824	-21	kworker/u8:2+events_unbound	11:30:15	1
1670096	99	22	18,3	cyclictest	1853089	-21	kworker/u8:2+flush-259:0	11:05:25	1
1670096	99	22	18,2	cyclictest	0	-21	swapper/1	08:45:00	1
1670103	99	21	17,3	cyclictest	1722226	-21	kworker/u8:2+events_unbound	08:05:15	3
1670103	99	21	14,5	cyclictest	1670023	-21	latency_hist	07:10:00	3
1670099	99	21	15,4	cyclictest	335557	-21	systemd-journal	11:23:48	2
1670103	99	20	17,2	cyclictest	1758045	-21	kworker/u8:2+flush-259:0	08:55:26	3
1670099	99	20	14,5	cyclictest	335557	-21	systemd-journal	08:29:41	2
1670093	99	20	7,2	cyclictest	1695123	-21	ntpq	07:30:22	0
1670093	99	20	5,4	cyclictest	1747192	-21	ntpq	08:20:22	0
1670093	99	20	16,3	cyclictest	507	-21	in:imuxsock	11:55:00	0
1670093	99	20	16,3	cyclictest	1998970	-21	apt-get	12:25:12	0
1670093	99	20	14,4	cyclictest	1858311	-21	apt-get	10:10:14	0
1670103	99	19	16,2	cyclictest	1763764	-21	latency_hist	08:40:01	3
1670103	99	19	16,2	cyclictest	0	-21	swapper/3	07:45:00	3
1670103	99	19	15,3	cyclictest	1617188	-21	kworker/u8:5+events_unbound	07:13:39	3
1670099	99	19	8,2	cyclictest	1816592	-21	cpuspeed_turbos	09:30:15	2
1670099	99	19	16,2	cyclictest	1701101	-21	kworker/u8:0+flush-259:0	08:45:26	2
1670099	99	19	15,3	cyclictest	1930824	-21	kworker/u8:2+flush-259:0	11:30:15	2
1670099	99	19	15,2	cyclictest	1897164	-21	kthreadcore	10:45:18	2
1670099	99	19	15,2	cyclictest	1863906	-21	irqcore	10:15:17	2
1670099	99	19	15,2	cyclictest	1863906	-21	irqcore	10:15:16	2
1670099	99	19	14,4	cyclictest	1847845	-21	gpgv	10:00:01	2
1670093	99	19	5,4	cyclictest	1898890	-21	ntpq	10:45:21	0
1670093	99	19	12,5	cyclictest	1872639	-21	ntpq	10:20:20	0
1670099	99	18	13,4	cyclictest	1972620	-21	kworker/u8:1+flush-259:0	12:05:17	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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