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

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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 792 highest latencies:

System rackeslot4s.osadl.org (updated Thu Sep 03, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1511914	99	38	34,3	cyclictest	1594535	-21	kworker/u8:3+events_unbound	21:13:21	1
1511919	99	37	33,3	cyclictest	1720069	-21	kworker/u8:2+events_unbound	23:40:23	3
1511916	99	35	29,5	cyclictest	1527651	-21	apt-get	19:25:11	2
1511914	99	35	32,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:35:25	1
1511914	99	33	30,2	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	22:40:27	1
1511914	99	32	29,2	cyclictest	1735611	-21	kworker/u8:1+flush-259:0	22:45:24	1
1511909	99	32	28,3	cyclictest	1537742	-21	kworker/u8:3+events_unbound	19:45:13	0
1511919	99	31	28,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:15:20	3
1511919	99	31	25,4	cyclictest	1672799	-21	apt-get	21:45:11	3
1511914	99	31	28,2	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	22:50:24	1
1511909	99	31	27,3	cyclictest	1840058	-21	kworker/u8:1+flush-259:0	00:30:24	0
1511919	99	29	24,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:35:00	3
1511919	99	29	24,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	00:20:15	3
1511909	99	29	25,3	cyclictest	1558388	-21	kworker/u8:4+flush-259:0	20:30:24	0
1511914	99	28	24,3	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	20:15:01	1
1511916	99	27	23,3	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	20:00:01	2
1511914	99	27	23,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:25:15	1
1511914	99	27	23,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:25:15	1
1511909	99	27	23,3	cyclictest	335557	-21	systemd-journal	20:05:01	0
1511919	99	26	22,3	cyclictest	1698426	-21	kworker/u8:2+events_unbound	22:15:00	3
1511909	99	26	22,3	cyclictest	1688288	-21	apt-get	22:00:11	0
1511919	99	25	22,2	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	19:35:24	3
1511919	99	24	19,4	cyclictest	1788307	-21	kworker/u8:0+events_unbound	23:50:19	3
1511919	99	24	18,4	cyclictest	1855869	-21	cp	00:40:00	3
1511916	99	24	18,4	cyclictest	1558348	-21	latency_hist	19:55:01	2
1511914	99	24	21,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:15:19	1
1511909	99	24	21,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:35:18	0
1511919	99	23	20,2	cyclictest	1720069	-21	kworker/u8:2+events_unbound	23:00:01	3
1511914	99	23	20,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	00:05:31	1
1511914	99	23	18,4	cyclictest	1568978	-21	apt-get	20:05:15	1
1511914	99	23	18,2	cyclictest	1594535	-21	kworker/u8:3+events_unbound	21:30:24	1
1511909	99	23	16,5	cyclictest	1766289	-21	ntpq	23:10:25	0
1511914	99	22	19,2	cyclictest	1798854	-21	kworker/u8:1+flush-259:0	23:58:12	1
1511909	99	22	18,3	cyclictest	1672579	-21	kworker/u8:0+events_unbound	21:50:29	0
1511916	99	21	15,4	cyclictest	335557	-21	systemd-journal	23:30:01	2
1511916	99	21	15,4	cyclictest	335557	-21	systemd-journal	23:30:00	2
1511914	99	21	19,1	cyclictest	1506520	-21	kworker/u8:3+events_unbound	19:15:19	1
1511914	99	21	18,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	22:55:24	1
1511914	99	21	18,2	cyclictest	1672579	-21	kworker/u8:0+flush-259:0	22:05:21	1
1511914	99	21	18,2	cyclictest	1589321	-21	kworker/u8:2+flush-259:0	20:25:17	1
1511919	99	20	16,3	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	22:50:15	3
1511919	99	20	15,3	cyclictest	335557	-21	systemd-journal	00:06:04	3
1511916	99	20	16,3	cyclictest	1788307	-21	kworker/u8:0+flush-259:0	23:50:20	2
1511914	99	20	17,2	cyclictest	1788307	-21	kworker/u8:0+flush-259:0	00:10:16	1
1511914	99	20	13,1	cyclictest	0	-21	swapper/1	23:25:00	1
1511909	99	20	17,2	cyclictest	1478395	-21	kworker/u8:2+events_unbound	19:35:01	0
1511909	99	20	15,4	cyclictest	1651820	-21	latency_hist	21:25:00	0
1511919	99	19	16,2	cyclictest	1600399	-21	irqcore	20:35:17	3
1511919	99	19	16,2	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	19:45:18	3
1511919	99	19	16,2	cyclictest	1506520	-21	kworker/u8:3+flush-259:0	19:10:24	3
1511919	99	19	15,3	cyclictest	1672579	-21	kworker/u8:0+flush-259:0	22:20:18	3
1511919	99	19	15,3	cyclictest	1672579	-21	kworker/u8:0+flush-259:0	21:50:22	3
1511919	99	19	15,3	cyclictest	1558388	-21	kworker/u8:4+events_unbound	20:00:23	3
1511914	99	19	16,2	cyclictest	1604910	-21	kworker/u8:1+events_unbound	20:45:14	1
1511914	99	19	16,2	cyclictest	1594535	-21	kworker/u8:3+events_unbound	20:35:20	1
1511914	99	19	15,3	cyclictest	1478395	-21	kworker/u8:2+events_unbound	19:55:16	1
1511914	99	19	14,4	cyclictest	1652054	-21	kworker/u8:4+flush-259:0	21:40:14	1
1511914	99	19	13,4	cyclictest	335557	-21	systemd-journal	19:50:00	1
1511909	99	19	15,3	cyclictest	1672579	-21	kworker/u8:0+events_unbound	22:05:18	0
1511919	99	18	15,2	cyclictest	1788532	-21	apt-get	23:35:12	3
1511919	99	18	14,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:20:15	3
1511919	99	18	14,3	cyclictest	1652054	-21	kworker/u8:4+events_unbound	21:25:23	3
1511916	99	18	14,2	cyclictest	1605396	-21	runrttasks	20:40:14	2
1511916	99	18	13,3	cyclictest	509	-21	rs:main		2
1511914	99	18	15,2	cyclictest	500	-21	systemd-logind	19:45:00	1
1511914	99	18	15,2	cyclictest	1672579	-21	kworker/u8:0+flush-259:0	22:10:22	1
1511914	99	18	15,2	cyclictest	1478395	-21	kworker/u8:2+flush-259:0	19:20:18	1
1511914	99	18	14,3	cyclictest	1709703	-21	gpgv	22:20:01	1
1511909	99	18	15,3	cyclictest	1698426	-21	kworker/u8:2+events_unbound	22:15:23	0
1511909	99	18	15,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	00:15:15	0
1511909	99	18	15,2	cyclictest	1703522	-21	sh	22:15:01	0
1511909	99	18	15,2	cyclictest	1558388	-21	kworker/u8:4+events_unbound	20:15:22	0
1511909	99	18	15,2	cyclictest	0	-21	swapper/0	19:30:01	0
1511909	99	18	15,1	cyclictest	0	-21	swapper/0	20:50:00	0
1511909	99	18	12,4	cyclictest	1640631	-21	ntpq	21:10:22	0
1511919	99	17	13,3	cyclictest	1610074	-21	kworker/u8:2+flush-259:0	20:55:23	3
1511919	99	17	13,3	cyclictest	1604910	-21	kworker/u8:1+events_unbound	20:45:20	3
1511919	99	17	12,4	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	19:40:17	3
1511916	99	17	14,2	cyclictest	1682880	-21	latency_hist	21:55:00	2
1511916	99	17	13,3	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	23:10:27	2
1511916	99	17	13,2	cyclictest	1709287	-21	base64	22:20:01	2
1511916	99	17	12,3	cyclictest	1735611	-21	kworker/u8:1+flush-259:0	22:45:16	2
1511916	99	17	10,6	cyclictest	1830098	-21	diskstats	00:15:15	2
1511916	99	17	0,15	cyclictest	1620428	-21	true	20:55:00	2
1511914	99	17	14,2	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	22:25:22	1
1511914	99	17	14,2	cyclictest	1558388	-21	kworker/u8:4+flush-259:0	20:30:20	1
1511914	99	17	13,3	cyclictest	1652054	-21	kworker/u8:4+events_unbound	22:00:16	1
1511914	99	17	13,3	cyclictest	1604910	-21	kworker/u8:1+flush-259:0	20:55:00	1
1511914	99	17	12,4	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	23:00:19	1
1511909	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:25:13	0
1511909	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:25:12	0
1511909	99	17	14,2	cyclictest	1798854	-21	kworker/u8:1+events_unbound	23:45:17	0
1511909	99	17	14,2	cyclictest	1682892	-21	kworker/u8:1+events_unbound	21:55:44	0
1511909	99	17	0,16	cyclictest	1	-21	systemd	23:34:44	0
1511919	99	16	13,2	cyclictest	1709345	-21	kworker/u8:3+events_unbound	22:25:21	3
1511919	99	16	12,3	cyclictest	1693444	-21	apt-get	22:05:11	3
1511916	99	16	2,12	cyclictest	1	-21	systemd	20:48:43	2
1511916	99	16	13,2	cyclictest	1855668	-21	sh	00:40:00	2
1511916	99	16	13,2	cyclictest	1840058	-21	kworker/u8:1+flush-259:0	00:30:23	2
1511916	99	16	12,3	cyclictest	1756925	-21	idleruntime-cro	23:04:59	2
1511914	99	16	13,2	cyclictest	1594535	-21	kworker/u8:3+events_unbound	21:16:11	1
1511914	99	16	13,2	cyclictest	1558388	-21	kworker/u8:4+flush-259:0	20:20:21	1
1511914	99	16	12,3	cyclictest	1720069	-21	kworker/u8:2+events_unbound	00:20:18	1
1511914	99	16	12,3	cyclictest	1478395	-21	kworker/u8:2+flush-259:0	19:30:21	1
1511909	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:25:15	0
1511909	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:05:20	0
1511909	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:25:15	0
1511909	99	16	14,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:08:11	0
1511909	99	16	13,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:50:19	0
1511909	99	16	13,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:35:27	0
1511909	99	16	13,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:41:55	0
1511909	99	16	13,2	cyclictest	1594535	-21	kworker/u8:3+events_unbound	20:41:44	0
1511909	99	16	12,3	cyclictest	0	-21	swapper/0	23:04:59	0
1511909	99	16	10,5	cyclictest	1761179	-21	ntpq	23:05:21	0
1511919	99	15	9,4	cyclictest	1783126	-21	latency_hist	23:30:00	3
1511919	99	15	12,2	cyclictest	1840058	-21	kworker/u8:1+events_unbound	00:25:22	3
1511919	99	15	12,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:05:24	3
1511919	99	15	11,3	cyclictest	1788307	-21	kworker/u8:0+events_unbound	23:55:18	3
1511919	99	15	11,3	cyclictest	1478395	-21	kworker/u8:2+flush-259:0	19:55:53	3
1511919	99	15	10,3	cyclictest	1630743	-21	kworker/u8:0+flush-259:0	21:10:24	3
1511916	99	15	9,4	cyclictest	1840042	-21	latency_hist	00:25:00	2
1511916	99	15	9,4	cyclictest	1636565	-21	/usr/sbin/munin	21:10:14	2
1511916	99	15	12,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:00:00	2
1511916	99	15	12,2	cyclictest	0	-21	swapper/2	20:30:15	2
1511916	99	15	11,3	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	22:55:25	2
1511916	99	15	11,3	cyclictest	1703925	-21	latency_hist	22:15:01	2
1511916	99	15	11,3	cyclictest	1558388	-21	kworker/u8:4+flush-259:0	20:20:16	2
1511916	99	15	11,2	cyclictest	0	-21	swapper/2	19:40:00	2
1511914	99	15	12,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:05:20	1
1511914	99	15	12,2	cyclictest	1594535	-21	kworker/u8:3+events_unbound	21:24:45	1
1511914	99	15	12,2	cyclictest	1478395	-21	kworker/u8:2+events_unbound	19:25:13	1
1511914	99	15	12,2	cyclictest	1360971	-21	kworker/u8:1+flush-259:0	19:14:59	1
1511909	99	15	8,5	cyclictest	1629794	-21	ntpq	21:00:21	0
1511909	99	15	7,1	cyclictest	1719849	-21	turbostat	22:30:01	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:45:16	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:40:19	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:35:26	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:30:24	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:55:34	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:20:15	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:20:14	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:10:16	0
1511909	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	00:03:01	0
1511909	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:54:17	0
1511909	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:15:28	0
1511909	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:40:18	0
1511909	99	15	12,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	23:15:10	0
1511909	99	15	11,3	cyclictest	1809216	-21	apt-get	23:55:12	0
1511909	99	15	11,3	cyclictest	1709345	-21	kworker/u8:3+events_unbound	22:50:02	0
1511909	99	15	11,3	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	20:05:23	0
1511919	99	14	8,4	cyclictest	1610054	-21	latency_hist	20:45:00	3
1511919	99	14	12,1	cyclictest	0	-21	swapper/3	21:05:00	3
1511919	99	14	12,1	cyclictest	0	-21	swapper/3	19:35:00	3
1511919	99	14	11,2	cyclictest	1709345	-21	kworker/u8:3+events_unbound	22:35:22	3
1511919	99	14	11,2	cyclictest	1528674	-21	sed	19:25:17	3
1511919	99	14	11,2	cyclictest	1522018	-21	kworker/u8:0+flush-259:0	20:05:26	3
1511919	99	14	10,3	cyclictest	1579256	-21	/usr/sbin/munin	20:15:14	3
1511909	99	14	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:23:20	0
1511909	99	14	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:45:11	0
1511909	99	14	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:36:55	0
1511909	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:59:06	0
1511909	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:55:55	0
1511909	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:35:17	0
1511909	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:20:16	0
1511909	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:35:22	0
1511909	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:20:28	0
1511909	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:30:00	0
1511909	99	14	11,2	cyclictest	1709345	-21	kworker/u8:3+events_unbound	22:40:14	0
1511909	99	14	11,2	cyclictest	1506520	-21	kworker/u8:3+events_unbound	19:10:21	0
1511919	99	13	9,3	cyclictest	1594535	-21	kworker/u8:3+events_unbound	21:30:21	3
1511919	99	13	7,4	cyclictest	1767180	-21	cron	23:15:00	3
1511919	99	13	11,1	cyclictest	0	-21	swapper/3	23:00:16	3
1511919	99	13	10,3	cyclictest	1709345	-21	kworker/u8:3+flush-259:0	23:05:18	3
1511919	99	13	10,2	cyclictest	1689305	-21	kthreadcore	22:00:17	3
1511919	99	13	10,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:25:00	3
1511916	99	13	11,1	cyclictest	1687042	-21	needreboot	21:55:19	2
1511916	99	13	10,2	cyclictest	1526407	-21	needreboot	19:20:20	2
1511914	99	13	10,2	cyclictest	1720069	-21	kworker/u8:2+events_unbound	23:05:13	1
1511914	99	13	10,2	cyclictest	1672579	-21	kworker/u8:0+events_unbound	21:55:11	1
1511914	99	13	10,2	cyclictest	1522018	-21	kworker/u8:0+events_unbound	19:35:25	1
1511909	99	13	9,3	cyclictest	1506520	-21	kworker/u8:3+events_unbound	19:15:15	0
1511909	99	13	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:13:56	0
1511909	99	13	10,2	cyclictest	1672579	-21	kworker/u8:0+events_unbound	22:31:24	0
1511919	99	12	9,2	cyclictest	1720069	-21	kworker/u8:2+flush-259:0	00:20:01	3
1511919	99	12	9,2	cyclictest	1652054	-21	kworker/u8:4+events_unbound	21:40:18	3
1511919	99	12	8,3	cyclictest	1558388	-21	kworker/u8:4+events_unbound	20:20:14	3
1511916	99	12	8,3	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	21:35:49	2
1511916	99	12	0,4	cyclictest	1799303	2	irqcore	23:45:17	2
1511914	99	12	9,2	cyclictest	1783599	-21	fschecks_count	23:30:15	1
1511909	99	12	9,2	cyclictest	1594535	-21	kworker/u8:3+flush-259:0	20:50:20	0
1511919	99	11	8,2	cyclictest	0	-21	swapper/3	20:30:19	3
1511916	99	11	8,2	cyclictest	1768478	-21	kthreadcore	23:15:14	2
1511916	99	11	5,4	cyclictest	1537687	-21	cron	19:35:00	2
1511916	99	10	6,2	cyclictest	0	-21	swapper/2	22:35:16	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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