OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Wed Jul 15, 2026 00:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1679000	2	199	0,3	sleep3	584	-21	kworker/3:2-events	21:22:33	3
1738031	2	97	0,4	sleep0	0	-21	swapper/0	22:22:28	0
1798630	2	72	0,5	sleep3	0	-21	swapper/3	23:22:33	3
1545842	99	64	55,6	cyclictest	1806888	-21	latency_hist	23:30:02	1
1545842	99	63	57,4	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	20:57:45	1
1545842	99	61	50,8	cyclictest	281	-21	systemd-journal	22:15:00	1
1545842	99	55	45,7	cyclictest	1717672	-21	latency_hist	22:00:01	1
1545842	99	53	46,6	cyclictest	1637933	-21	kworker/u8:0+flush-8:0	21:42:41	1
1545842	99	53	43,7	cyclictest	1598249	-21	grub-install	20:01:34	1
1545844	99	50	39,8	cyclictest	1866425	-21	cp	00:30:01	2
1545838	99	50	42,5	cyclictest	281	-21	systemd-journal	21:30:01	0
1545842	99	49	43,5	cyclictest	1598357	-21	kworker/u8:4+events_unbound	00:27:32	1
1545842	99	49	39,7	cyclictest	1652835	-21	latency_hist	20:55:00	1
1545838	99	49	38,8	cyclictest	281	-21	systemd-journal	00:35:01	0
1545842	99	48	43,3	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	20:07:44	1
1545838	99	48	40,6	cyclictest	1663703	-21	diskstats	21:07:31	0
1545838	99	48	38,7	cyclictest	281	-21	systemd-journal	20:54:14	0
1545842	99	47	41,4	cyclictest	1826713	-21	kworker/u8:0+events_unbound	00:00:00	1
1545842	99	47	41,3	cyclictest	1777233	-21	kworker/u8:1+flush-8:0	23:02:45	1
1545842	99	46	40,4	cyclictest	1667270	-21	kworker/u8:2+flush-8:0	21:07:46	1
1545842	99	46	39,5	cyclictest	1710884	-21	kworker/u8:2+flush-8:0	22:47:33	1
1545842	99	46	33,8	cyclictest	281	-21	systemd-journal	23:17:44	1
1545842	99	45	38,5	cyclictest	1710884	-21	kworker/u8:2+events_unbound	22:52:33	1
1545838	99	45	34,8	cyclictest	281	-21	systemd-journal	20:01:16	0
1545842	99	44	38,4	cyclictest	1777233	-21	kworker/u8:1+events_unbound	23:37:45	1
1545842	99	43	35,6	cyclictest	1710884	-21	kworker/u8:2+flush-8:0	21:52:44	1
1545842	99	42	35,5	cyclictest	1777233	-21	kworker/u8:1+flush-8:0	23:12:40	1
1545842	99	42	35,5	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	20:12:39	1
1545838	99	42	36,4	cyclictest	1710884	-21	kworker/u8:2+events_unbound	22:07:35	0
1545838	99	42	32,7	cyclictest	281	-21	systemd-journal	00:26:53	0
1545842	99	41	35,4	cyclictest	1777233	-21	kworker/u8:1+flush-8:0	23:42:31	1
1545844	99	40	29,9	cyclictest	1632990	-21	awk	20:35:00	2
1545842	99	40	34,4	cyclictest	1710884	-21	kworker/u8:2+events_unbound	22:02:27	1
1545838	99	40	31,6	cyclictest	1622885	-21	latency_hist	20:25:01	0
1545842	99	39	34,3	cyclictest	1836669	-21	kworker/u8:2+flush-8:0	00:07:45	1
1545842	99	39	33,4	cyclictest	1710884	-21	kworker/u8:2+flush-8:0	22:57:31	1
1545842	99	39	33,4	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	21:22:40	1
1545842	99	39	32,5	cyclictest	1851938	-21	apt-get	00:17:25	1
1545842	99	39	32,5	cyclictest	1582447	-21	kworker/u8:3+events_unbound	20:42:43	1
1545842	99	39	31,6	cyclictest	1647072	-21	ntpq	20:47:38	1
1545842	99	39	30,6	cyclictest	1303013	-21	kworker/u8:1+flush-8:0	19:17:40	1
1545838	99	39	35,3	cyclictest	1672746	-21	kworker/u8:1+flush-8:0	21:27:43	0
1545838	99	39	30,7	cyclictest	1835804	-21	ntpq	23:57:37	0
1601831	2	38	0,5	sleep3	0	-21	swapper/3	20:02:37	3
1545842	99	38	34,3	cyclictest	1598357	-21	kworker/u8:4+events_unbound	00:22:29	1
1545842	99	38	32,4	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	00:37:29	1
1545842	99	38	31,5	cyclictest	1582447	-21	kworker/u8:3+events_unbound	19:47:42	1
1545842	99	38	30,6	cyclictest	1637933	-21	kworker/u8:0+flush-8:0	21:37:38	1
1545838	99	38	30,5	cyclictest	1612804	-21	sshd	20:13:05	0
1545838	99	38	29,7	cyclictest	1830895	-21	ntpq	23:52:38	0
1545838	99	38	29,7	cyclictest	1716937	-21	ntpq	21:57:39	0
1545842	99	37	32,4	cyclictest	1504653	-21	kworker/u8:3+flush-8:0	19:27:44	1
1545842	99	37	32,3	cyclictest	1637933	-21	kworker/u8:0+events_unbound	21:47:34	1
1545842	99	37	27,7	cyclictest	1627792	-21	apt-get	20:30:00	1
1545838	99	37	32,3	cyclictest	1783551	-21	kthreadcore	23:07:32	0
1545838	99	37	30,5	cyclictest	281	-21	systemd-journal	20:33:08	0
1545838	99	37	28,6	cyclictest	1822417	-21	diskstats	23:47:27	0
1545559	2	37	3,11	sleep1	0	-21	swapper/1	19:08:31	1
1545842	99	36	32,3	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	00:05:01	1
1545842	99	36	32,3	cyclictest	1598357	-21	kworker/u8:4+events_unbound	23:45:02	1
1545842	99	36	30,4	cyclictest	1743115	-21	apt-get	22:27:25	1
1545838	99	36	30,5	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	22:49:15	0
1545838	99	36	30,5	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	20:48:14	0
1545838	99	36	28,5	cyclictest	1747598	-21	latency_hist	22:30:01	0
1545842	99	35	30,4	cyclictest	1637933	-21	kworker/u8:0+events_unbound	21:04:53	1
1545842	99	35	30,4	cyclictest	1637933	-21	kworker/u8:0+events_unbound	21:04:53	1
1545842	99	35	30,3	cyclictest	1598357	-21	kworker/u8:4+events_unbound	20:37:34	1
1545844	99	34	23,8	cyclictest	1781541	-21	ntpq	23:02:42	2
1545838	99	34	31,2	cyclictest	1811851	-21	basename	23:35:00	0
1545838	99	34	29,3	cyclictest	1801969	-21	cron	23:24:59	0
1545838	99	34	28,4	cyclictest	1762148	-21	grep	22:42:44	0
1545838	99	34	28,4	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	23:40:20	0
1545838	99	34	28,4	cyclictest	1582447	-21	kworker/u8:3+flush-8:0	20:42:31	0
1545627	2	34	4,10	sleep2	0	-21	swapper/2	19:09:25	2
1545844	99	33	28,4	cyclictest	1592653	-21	kworker/u8:0+flush-8:0	20:01:33	2
1545842	99	33	28,4	cyclictest	1598357	-21	kworker/u8:4+events_unbound	21:32:45	1
1545842	99	33	26,5	cyclictest	1710884	-21	kworker/u8:2+events_unbound	22:32:29	1
1545842	99	33	25,6	cyclictest	1727411	-21	kworker/u8:0+flush-8:0	22:17:41	1
1545838	99	33	29,3	cyclictest	1836669	-21	kworker/u8:2+flush-8:0	00:16:00	0
1545838	99	33	27,5	cyclictest	1637933	-21	kworker/u8:0+flush-8:0	21:02:14	0
1545838	99	33	27,5	cyclictest	1637933	-21	kworker/u8:0+flush-8:0	21:02:14	0
1545844	99	32	24,6	cyclictest	1618028	-21	cat	20:20:01	2
1545844	99	32	22,7	cyclictest	1747606	-21	awk	22:30:00	2
1545838	99	32	28,3	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	22:38:15	0
1545838	99	32	27,3	cyclictest	1557635	-21	apt	19:20:00	0
1545838	99	32	26,4	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	00:11:27	0
1545838	99	32	24,6	cyclictest	1627789	-21	latency_hist	20:30:01	0
1545842	99	31	26,3	cyclictest	1303013	-21	kworker/u8:1+flush-8:0	19:37:44	1
1545842	99	31	25,5	cyclictest	1598357	-21	kworker/u8:4+flush-8:0	00:12:40	1
1545842	99	31	23,6	cyclictest	1797428	-21	/usr/sbin/munin	23:22:43	1
1545842	99	31	23,6	cyclictest	1504653	-21	kworker/u8:3+flush-8:0	19:12:42	1
1545838	99	31	27,3	cyclictest	1	-21	systemd	00:40:00	0
1545838	99	31	26,4	cyclictest	1637933	-21	kworker/u8:0+events_unbound	21:37:36	0
1545838	99	31	21,8	cyclictest	1733222	-21	diskstats	22:17:30	0
1545844	99	30	27,2	cyclictest	1568190	-21	tr	19:32:28	2
1545844	99	30	25,3	cyclictest	1627567	-21	unixbench_singl	20:27:46	2
1545844	99	30	18,10	cyclictest	1871491	-21	awk	00:35:01	2
1545842	99	30	26,3	cyclictest	1672746	-21	kworker/u8:1+events_unbound	21:27:29	1
1545842	99	30	25,3	cyclictest	1808042	-21	irqrtprio	23:32:33	1
1545842	99	30	24,5	cyclictest	1710884	-21	kworker/u8:2+events_unbound	22:07:28	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17