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 Thu Jul 23, 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
1431844	99	58	38,15	cyclictest	335557	-21	systemd-journal	09:15:21	1
1431840	99	54	46,5	cyclictest	1452487	-21	latency_hist	07:30:01	0
1431850	99	47	41,3	cyclictest	335557	-21	systemd-journal	10:35:16	3
1431850	99	47	41,3	cyclictest	335557	-21	systemd-journal	10:35:16	3
1431850	99	46	42,3	cyclictest	1598742	-21	kworker/u8:2+flush-259:0	11:10:26	3
1431850	99	45	39,4	cyclictest	1473546	-21	latency_hist	07:50:01	3
1431846	99	44	41,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	12:30:30	2
1431846	99	43	40,2	cyclictest	1572972	-21	kworker/u8:3+events_unbound	09:53:25	2
1431846	99	43	40,2	cyclictest	1468414	-21	kworker/u8:2+events_unbound	08:00:04	2
1431850	99	42	36,4	cyclictest	1530353	-21	gpgv	08:45:01	3
1431844	99	42	37,3	cyclictest	1520212	-21	apt-get	08:35:13	1
1431850	99	41	38,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	11:02:26	3
1431850	99	41	38,2	cyclictest	1551876	-21	kworker/u8:0+events_unbound	09:45:28	3
1431846	99	41	38,2	cyclictest	1551876	-21	kworker/u8:0+events_unbound	09:37:26	2
1431850	99	40	37,2	cyclictest	1717913	-21	kworker/u8:0+flush-259:0	12:10:25	3
1431850	99	40	34,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	07:25:20	3
1431850	99	39	36,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:05:21	3
1431850	99	39	36,2	cyclictest	1520173	-21	kworker/u8:4+flush-259:0	08:45:26	3
1431846	99	39	36,2	cyclictest	1572972	-21	kworker/u8:3+events_unbound	10:06:26	2
1431846	99	39	36,2	cyclictest	1520173	-21	kworker/u8:4+events_unbound	08:47:26	2
1431846	99	39	36,2	cyclictest	1468414	-21	kworker/u8:2+events_unbound	08:15:27	2
1431850	99	38	31,5	cyclictest	1727469	-21	ntpq	11:50:22	3
1431846	99	38	32,4	cyclictest	335557	-21	systemd-journal	07:54:59	2
1431846	99	37	34,2	cyclictest	1749283	-21	kworker/u8:4+events_unbound	12:38:26	2
1431850	99	36	33,2	cyclictest	1717913	-21	kworker/u8:0+flush-259:0	11:45:46	3
1431850	99	36	33,2	cyclictest	1447240	-21	kworker/u8:1+events_unbound	07:30:26	3
1431846	99	35	32,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	11:25:27	2
1431850	99	34	31,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	12:25:20	3
1431850	99	34	28,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	07:20:12	3
1431844	99	34	29,3	cyclictest	1462840	-21	apt-get	07:40:01	1
1431840	99	34	28,4	cyclictest	335557	-21	systemd-journal	10:10:13	0
1431850	99	33	30,2	cyclictest	1468414	-21	kworker/u8:2+events_unbound	08:15:14	3
1431850	99	33	29,3	cyclictest	1598742	-21	kworker/u8:2+events_unbound	11:55:13	3
1431846	99	33	30,2	cyclictest	1520173	-21	kworker/u8:4+events_unbound	09:04:10	2
1431846	99	33	28,4	cyclictest	1457658	-21	latency_hist	07:35:01	2
1431840	99	33	29,2	cyclictest	1551876	-21	kworker/u8:0+flush-259:0	09:25:24	0
1431840	99	33	26,5	cyclictest	1441267	-21	ntpq	07:15:21	0
1431850	99	32	29,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:55:21	3
1431850	99	32	29,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	08:28:27	3
1431850	99	32	27,2	cyclictest	1697039	-21	kworker/u8:1+events_unbound	11:33:25	3
1431850	99	32	27,2	cyclictest	1572972	-21	kworker/u8:3+events_unbound	11:22:26	3
1431850	99	31	28,2	cyclictest	1551876	-21	kworker/u8:0+events_unbound	09:35:10	3
1431850	99	31	28,2	cyclictest	1377989	-21	kworker/u8:4+events_unbound	07:14:55	3
1431850	99	31	27,3	cyclictest	1520173	-21	kworker/u8:4+events_unbound	09:00:02	3
1431846	99	31	28,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:56:07	2
1431846	99	31	28,2	cyclictest	1504240	-21	kworker/u8:1+events_unbound	08:21:26	2
1431846	99	31	28,2	cyclictest	1447240	-21	kworker/u8:1+events_unbound	07:44:59	2
1431840	99	31	24,5	cyclictest	335557	-21	systemd-journal	08:25:09	0
1431850	99	30	27,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:16:26	3
1431850	99	30	25,3	cyclictest	1535942	-21	kworker/u8:1+events_unbound	09:14:26	3
1431846	99	30	28,2	cyclictest	1717913	-21	kworker/u8:0+events_unbound	12:11:29	2
1431844	99	30	26,3	cyclictest	1551876	-21	kworker/u8:0+flush-259:0	09:10:21	1
1431844	99	30	24,4	cyclictest	1743921	-21	latency_hist	12:10:00	1
1431844	99	30	23,5	cyclictest	335557	-21	systemd-journal	09:30:09	1
1431840	99	30	24,4	cyclictest	1463349	-21	cat	07:40:01	0
1431840	99	30	23,5	cyclictest	1562361	-21	base64	09:15:01	0
1431850	99	29	26,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:45:14	3
1431850	99	29	26,2	cyclictest	1551876	-21	kworker/u8:0+flush-259:0	09:50:23	3
1431850	99	29	26,2	cyclictest	1520173	-21	kworker/u8:4+events_unbound	08:58:43	3
1431850	99	29	26,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	08:13:26	3
1431850	99	29	26,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	08:13:26	3
1431850	99	29	25,3	cyclictest	1551876	-21	kworker/u8:0+events_unbound	09:25:10	3
1431850	99	29	25,3	cyclictest	1388847	-21	kworker/u8:0+flush-259:0	07:39:40	3
1431850	99	29	25,3	cyclictest	1377989	-21	kworker/u8:4+events_unbound	07:15:31	3
1431846	99	29	27,2	cyclictest	1697039	-21	kworker/u8:1+events_unbound	11:33:15	2
1431846	99	29	27,2	cyclictest	1640296	-21	kworker/u8:1+events_unbound	10:32:05	2
1431846	99	29	26,2	cyclictest	1712657	-21	kworker/u8:3+events_unbound	11:45:29	2
1431846	99	29	26,2	cyclictest	1535942	-21	kworker/u8:1+events_unbound	09:12:22	2
1431844	99	29	22,5	cyclictest	1530430	-21	cp	08:45:01	1
1431844	99	29	18,9	cyclictest	335557	-21	systemd-journal	08:48:26	1
1431850	99	28	25,2	cyclictest	1509660	-21	kworker/u8:3+events_unbound	08:52:08	3
1431850	99	28	24,3	cyclictest	1717913	-21	kworker/u8:0+events_unbound	12:04:26	3
1431846	99	28	26,2	cyclictest	1717913	-21	kworker/u8:0+events_unbound	12:06:27	2
1431846	99	28	25,2	cyclictest	1509660	-21	kworker/u8:3+events_unbound	08:55:30	2
1431850	99	27	24,2	cyclictest	1572972	-21	kworker/u8:3+events_unbound	10:00:01	3
1431850	99	27	24,2	cyclictest	1520173	-21	kworker/u8:4+events_unbound	09:07:28	3
1431850	99	27	23,3	cyclictest	1567306	-21	kworker/u8:2+events_unbound	09:23:25	3
1431850	99	27	21,4	cyclictest	1633999	-21	ntpq	10:20:20	3
1431846	99	27	24,2	cyclictest	1717913	-21	kworker/u8:0+events_unbound	12:04:25	2
1431844	99	27	23,3	cyclictest	1749283	-21	kworker/u8:4+flush-259:0	12:35:14	1
1431844	99	27	21,3	cyclictest	1551876	-21	kworker/u8:0+flush-259:0	09:45:00	1
1431850	99	26	23,2	cyclictest	1717913	-21	kworker/u8:0+events_unbound	12:05:24	3
1431850	99	26	23,2	cyclictest	1504240	-21	kworker/u8:1+flush-259:0	08:20:29	3
1431850	99	26	23,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	07:51:31	3
1431846	99	26	23,2	cyclictest	1388847	-21	kworker/u8:0+events_unbound	07:29:55	2
1431846	99	26	21,4	cyclictest	1681509	-21	latency_hist	11:10:01	2
1431844	99	26	19,5	cyclictest	335557	-21	systemd-journal	07:24:59	1
1431840	99	26	23,2	cyclictest	1551876	-21	kworker/u8:0+flush-259:0	09:30:23	0
1431850	99	25	22,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	12:35:26	3
1431850	99	25	22,2	cyclictest	1598742	-21	kworker/u8:2+events_unbound	10:10:48	3
1431850	99	25	22,2	cyclictest	1535942	-21	kworker/u8:1+events_unbound	09:15:07	3
1431850	99	25	18,2	cyclictest	1634930	-21	kworker/u8:0+events_unbound	10:40:20	3
1431844	99	25	19,5	cyclictest	1650684	-21	apt-get	10:40:12	1
1431840	99	25	21,3	cyclictest	1572972	-21	kworker/u8:3+flush-259:0	10:15:27	0
1431850	99	24	21,2	cyclictest	1749283	-21	kworker/u8:4+events_unbound	12:24:25	3
1431850	99	24	21,2	cyclictest	1749069	-21	kworker/u8:1+events_unbound	12:15:51	3
1431846	99	24	21,2	cyclictest	1551876	-21	kworker/u8:0+events_unbound	09:56:03	2
1431844	99	24	19,3	cyclictest	1712820	-21	cron	11:40:00	1
1431840	99	24	19,3	cyclictest	1739015	-21	apt-get	12:05:13	0
1431840	99	24	17,6	cyclictest	1707674	-21	idleruntime-cro	11:35:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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