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 Wed Jul 15, 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
1461934	99	38	31,5	cyclictest	335557	-21	systemd-journal	22:20:00	2
1461934	99	37	31,4	cyclictest	1772302	-21	latency_hist	00:10:00	2
1461934	99	34	32,1	cyclictest	1627634	-21	kworker/u8:2+events_unbound	21:55:24	2
1461934	99	33	30,2	cyclictest	1690023	-21	kworker/u8:0+flush-259:0	23:00:24	2
1461937	99	32	28,3	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	22:30:01	3
1461937	99	32	26,4	cyclictest	1803669	-21	latency_hist	00:40:01	3
1461934	99	32	25,5	cyclictest	335557	-21	systemd-journal	19:20:00	2
1461934	99	32	25,5	cyclictest	335557	-21	systemd-journal	19:20:00	2
1461934	99	31	28,2	cyclictest	1492903	-21	kworker/u8:2+events_unbound	20:00:01	2
1461922	99	30	24,4	cyclictest	1684632	-21	latency_hist	22:45:00	0
1461937	99	29	24,4	cyclictest	335557	-21	systemd-journal	21:16:20	3
1461934	99	29	26,2	cyclictest	1751585	-21	kworker/u8:4+events_unbound	00:15:17	2
1461934	99	29	23,2	cyclictest	1690023	-21	kworker/u8:0+events_unbound	23:45:20	2
1461937	99	28	25,2	cyclictest	1710617	-21	kworker/u8:1+events_unbound	00:00:28	3
1461934	99	28	25,2	cyclictest	1467273	-21	kworker/u8:4+events_unbound	20:25:24	2
1461928	99	28	24,3	cyclictest	335557	-21	systemd-journal	21:29:20	1
1461934	99	27	24,2	cyclictest	1710617	-21	kworker/u8:1+events_unbound	00:20:18	2
1461934	99	27	23,3	cyclictest	1710617	-21	kworker/u8:1+flush-259:0	00:25:17	2
1461934	99	27	23,3	cyclictest	1710617	-21	kworker/u8:1+events_unbound	00:30:20	2
1461934	99	27	20,5	cyclictest	335557	-21	systemd-journal	22:30:01	2
1461934	99	27	20,2	cyclictest	1492903	-21	kworker/u8:2+events_unbound	19:50:22	2
1461922	99	27	21,4	cyclictest	1549928	-21	latency_hist	20:35:01	0
1461934	99	26	23,2	cyclictest	1690023	-21	kworker/u8:0+events_unbound	23:14:59	2
1461934	99	26	23,2	cyclictest	1643016	-21	kworker/u8:4+events_unbound	22:35:21	2
1461934	99	26	23,2	cyclictest	1643016	-21	kworker/u8:4+events_unbound	22:05:24	2
1461934	99	26	23,2	cyclictest	1467273	-21	kworker/u8:4+flush-259:0	20:05:20	2
1461934	99	26	23,2	cyclictest	1422852	-21	kworker/u8:0+events_unbound	19:20:24	2
1461934	99	26	22,3	cyclictest	1710617	-21	kworker/u8:1+flush-259:0	23:20:18	2
1461934	99	26	22,3	cyclictest	1555303	-21	kworker/u8:2+events_unbound	21:15:12	2
1461934	99	26	21,3	cyclictest	509	-21	rs:main		2
1461934	99	26	21,3	cyclictest	1710617	-21	kworker/u8:1+events_unbound	23:25:26	2
1461934	99	26	21,3	cyclictest	1487956	-21	/usr/sbin/munin	19:35:15	2
1461928	99	26	22,3	cyclictest	1663677	-21	gpgv	22:25:01	1
1461934	99	25	22,2	cyclictest	1690023	-21	kworker/u8:0+events_unbound	23:58:33	2
1461934	99	25	22,2	cyclictest	1690023	-21	kworker/u8:0+events_unbound	22:50:14	2
1461934	99	25	22,2	cyclictest	1643016	-21	kworker/u8:4+events_unbound	22:45:25	2
1461934	99	25	22,2	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	23:05:20	2
1461934	99	25	22,2	cyclictest	1549976	-21	kworker/u8:1+flush-259:0	22:00:15	2
1461934	99	25	22,2	cyclictest	1467273	-21	kworker/u8:4+flush-259:0	19:45:16	2
1461934	99	25	18,5	cyclictest	1627588	-21	latency_hist	21:50:00	2
1461928	99	25	21,3	cyclictest	1575903	-21	kworker/u8:3+flush-259:0	21:10:00	1
1461922	99	25	20,4	cyclictest	1560233	-21	latency_hist	20:45:01	0
1461934	99	24	21,2	cyclictest	1643016	-21	kworker/u8:4+flush-259:0	22:30:25	2
1461934	99	24	21,2	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	22:55:24	2
1461934	99	24	17,5	cyclictest	335557	-21	systemd-journal	19:30:00	2
1461928	99	24	20,3	cyclictest	1736160	-21	kworker/u8:2+flush-259:0	23:39:59	1
1461928	99	24	20,3	cyclictest	1549976	-21	kworker/u8:1+flush-259:0	21:00:25	1
1461928	99	24	20,2	cyclictest	1617601	-21	apt-get	21:40:13	1
1461922	99	24	21,2	cyclictest	1690023	-21	kworker/u8:0+flush-259:0	23:30:00	0
1461922	99	24	21,2	cyclictest	1428560	-21	kworker/u8:3+flush-259:0	19:10:21	0
1461922	99	24	18,4	cyclictest	1580809	-21	latency_hist	21:05:01	0
1461937	99	23	20,2	cyclictest	1633016	-21	apt-get	21:55:13	3
1461934	99	23	20,2	cyclictest	1751585	-21	kworker/u8:4+events_unbound	00:00:15	2
1461934	99	23	20,2	cyclictest	1653376	-21	kworker/u8:0+events_unbound	22:20:16	2
1461934	99	23	20,2	cyclictest	1555303	-21	kworker/u8:2+events_unbound	20:50:15	2
1461922	99	23	20,2	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	22:45:19	0
1461922	99	23	19,3	cyclictest	1503471	-21	apt-get	19:50:12	0
1461937	99	22	19,2	cyclictest	1663648	-21	sh	22:25:00	3
1461937	99	22	18,3	cyclictest	1472231	-21	latency_hist	19:20:00	3
1461937	99	22	18,3	cyclictest	1472231	-21	latency_hist	19:20:00	3
1461934	99	22	19,2	cyclictest	1772527	-21	kworker/u8:2+events_unbound	00:36:40	2
1461934	99	22	19,2	cyclictest	1492903	-21	kworker/u8:2+events_unbound	20:10:16	2
1461934	99	22	18,3	cyclictest	1570535	-21	kworker/u8:0+flush-259:0	21:05:20	2
1461934	99	22	18,3	cyclictest	1549976	-21	kworker/u8:1+flush-259:0	21:10:25	2
1461934	99	22	17,3	cyclictest	1422852	-21	kworker/u8:0+flush-259:0	20:30:19	2
1461937	99	21	18,2	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	21:45:19	3
1461937	99	21	17,3	cyclictest	1467273	-21	kworker/u8:4+flush-259:0	20:10:00	3
1461934	99	21	18,2	cyclictest	1528946	-21	kworker/u8:1+flush-259:0	20:20:25	2
1461934	99	21	18,2	cyclictest	1467273	-21	kworker/u8:4+events_unbound	19:40:23	2
1461934	99	21	17,3	cyclictest	1751585	-21	kworker/u8:4+events_unbound	00:10:34	2
1461934	99	21	17,3	cyclictest	1726045	-21	kworker/u8:3+events_unbound	23:38:33	2
1461934	99	21	17,3	cyclictest	1549976	-21	kworker/u8:1+events_unbound	20:40:14	2
1461928	99	21	17,3	cyclictest	1643016	-21	kworker/u8:4+flush-259:0	22:35:00	1
1461928	99	21	15,4	cyclictest	1565371	-21	latency_hist	20:50:00	1
1461922	99	21	15,5	cyclictest	1658923	-21	diskstats	22:20:14	0
1461937	99	20	17,2	cyclictest	1606773	-21	store	21:30:00	3
1461934	99	20	17,2	cyclictest	1595987	-21	kworker/u8:3+events_unbound	22:10:23	2
1461934	99	20	17,2	cyclictest	1549976	-21	kworker/u8:1+events_unbound	20:55:21	2
1461934	99	20	15,3	cyclictest	1549976	-21	kworker/u8:1+events_unbound	21:39:22	2
1461934	99	20	15,3	cyclictest	1549976	-21	kworker/u8:1+events_unbound	21:39:22	2
1461928	99	20	16,3	cyclictest	1477680	-21	apt-get	19:25:11	1
1461928	99	20	0,19	cyclictest	1761915	-21	dirname	00:00:00	1
1461937	99	19	17,1	cyclictest	0	-21	swapper/3	23:59:59	3
1461937	99	19	14,4	cyclictest	1700379	-21	apt-get	23:00:10	3
1461934	99	19	16,2	cyclictest	1595987	-21	kworker/u8:3+flush-259:0	22:40:16	2
1461928	99	19	16,2	cyclictest	1550198	-21	apt-get	20:35:14	1
1461928	99	19	15,3	cyclictest	507	-21	in:imuxsock	23:45:00	1
1461922	99	19	15,3	cyclictest	1637908	-21	kworker/u8:0+flush-259:0	22:05:00	0
1461922	99	19	15,3	cyclictest	1422852	-21	kworker/u8:0+flush-259:0	19:20:43	0
1461937	99	18	16,1	cyclictest	1564459	-21	ntp_kernel_err	20:45:20	3
1461937	99	18	14,3	cyclictest	335557	-21	systemd-journal	20:59:55	3
1461934	99	18	15,2	cyclictest	1595987	-21	kworker/u8:3+events_unbound	21:25:23	2
1461934	99	18	15,2	cyclictest	1549976	-21	kworker/u8:1+events_unbound	21:50:15	2
1461934	99	18	15,2	cyclictest	1467273	-21	kworker/u8:4+events_unbound	20:35:25	2
1461934	99	18	14,3	cyclictest	1710617	-21	kworker/u8:1+events_unbound	23:41:50	2
1461928	99	18	16,1	cyclictest	0	-21	swapper/1	20:10:00	1
1461928	99	18	15,2	cyclictest	1690023	-21	kworker/u8:0+flush-259:0	00:05:18	1
1461928	99	18	15,2	cyclictest	1539191	-21	cron	20:25:01	1
1461928	99	18	14,3	cyclictest	1492903	-21	kworker/u8:2+events_unbound	20:12:03	1
1461928	99	18	14,2	cyclictest	0	-21	swapper/1	19:40:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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