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 Thu Aug 06, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1816604	2	199	0,5	sleep3	48	1	ktimers/3	12:00:00	3
1582383	2	141	0,2	sleep3	45	1	irq_work/3	08:02:59	3
1807907	2	77	0,1	chrt	1807911	-21	irqrtprio	11:52:53	2
1590460	2	67	0,4	sleep0	0	-21	swapper/0	08:12:55	0
1527047	99	58	53,3	cyclictest	1707442	-21	kworker/u8:3+events_unbound	11:20:00	1
1527047	99	53	47,5	cyclictest	1517310	-21	kworker/u8:0+events_unbound	07:18:05	1
1527047	99	51	46,4	cyclictest	1707442	-21	kworker/u8:3+flush-8:0	10:33:06	1
1527047	99	48	42,5	cyclictest	1737322	-21	kworker/u8:1+flush-8:0	12:13:07	1
1527047	99	47	39,6	cyclictest	1777515	-21	/usr/sbin/munin	11:23:06	1
1527047	99	46	40,4	cyclictest	1648067	-21	kworker/u8:1+flush-8:0	09:13:07	1
1527050	99	45	34,8	cyclictest	1821766	-21	awk	12:05:00	2
1527047	99	45	40,4	cyclictest	1737322	-21	kworker/u8:1+flush-8:0	11:57:49	1
1527047	99	45	39,5	cyclictest	1707442	-21	kworker/u8:3+flush-8:0	11:53:04	1
1527047	99	44	39,3	cyclictest	1563837	-21	kworker/u8:1+events_unbound	08:12:52	1
1527045	99	44	38,4	cyclictest	1737322	-21	kworker/u8:1+events_unbound	11:33:03	0
1527047	99	43	37,5	cyclictest	1598627	-21	kworker/u8:0+flush-8:0	09:27:52	1
1527047	99	43	35,5	cyclictest	1817292	-21	/usr/sbin/munin	12:03:06	1
1527050	99	42	22,18	cyclictest	1618154	-21	idleruntime-cro	08:40:00	2
1527047	99	42	37,4	cyclictest	1598627	-21	kworker/u8:0+flush-8:0	10:47:52	1
1527047	99	42	37,4	cyclictest	1598627	-21	kworker/u8:0+events_unbound	09:47:52	1
1527047	99	42	36,5	cyclictest	1648067	-21	kworker/u8:1+flush-8:0	09:33:05	1
1527047	99	42	36,5	cyclictest	1598627	-21	kworker/u8:0+flush-8:0	10:08:06	1
1527047	99	42	36,4	cyclictest	1797069	-21	kworker/u8:0+events_unbound	11:42:49	1
1527047	99	42	35,5	cyclictest	1786926	-21	latency_hist	11:30:01	1
1527047	99	42	35,5	cyclictest	1613465	-21	kworker/u8:3+flush-8:0	08:43:07	1
1527047	99	41	36,4	cyclictest	1797069	-21	kworker/u8:0+events_unbound	12:37:50	1
1527047	99	41	32,7	cyclictest	275	-21	systemd-journal	10:55:00	1
1527047	99	41	31,8	cyclictest	1677123	-21	ntpq	09:38:02	1
1527050	99	40	25,13	cyclictest	1752134	-21	unixbench_singl	10:53:08	2
1527047	99	40	35,4	cyclictest	1598627	-21	kworker/u8:0+flush-8:0	09:07:52	1
1527047	99	40	35,3	cyclictest	1747608	-21	kworker/u8:2+events_unbound	10:57:51	1
1527047	99	39	34,3	cyclictest	1826747	-21	kworker/u8:2+flush-8:0	12:23:05	1
1527047	99	39	34,3	cyclictest	1598627	-21	kworker/u8:0+events_unbound	09:18:04	1
1527045	99	39	34,3	cyclictest	1517310	-21	kworker/u8:0+events_unbound	07:27:49	0
1527045	99	39	32,5	cyclictest	1290803	-21	kworker/u8:2+flush-8:0	07:48:00	0
1527047	99	38	34,3	cyclictest	1707442	-21	kworker/u8:3+events_unbound	11:02:52	1
1527047	99	38	33,4	cyclictest	1517310	-21	kworker/u8:0+flush-8:0	07:27:54	1
1527047	99	38	32,4	cyclictest	1613220	-21	latency_hist	08:35:01	1
1527045	99	38	28,8	cyclictest	1796142	-21	ntpq	11:38:01	0
1527050	99	37	20,15	cyclictest	1712747	-21	latency_hist	10:15:00	2
1527050	99	37	19,16	cyclictest	1578399	-21	idleruntime-cro	08:00:00	2
1527047	99	37	33,3	cyclictest	1737322	-21	kworker/u8:1+events_unbound	12:07:55	1
1527045	99	37	32,4	cyclictest	1737322	-21	kworker/u8:1+events_unbound	12:05:01	0
1527047	99	36	30,4	cyclictest	1648067	-21	kworker/u8:1+flush-8:0	10:13:08	1
1527047	99	36	30,4	cyclictest	1613465	-21	kworker/u8:3+events_unbound	08:58:05	1
1527047	99	36	29,5	cyclictest	1722864	-21	kworker/u8:2+flush-8:0	10:37:52	1
1527050	99	35	20,13	cyclictest	1628640	-21	aten2_r5power_v	08:52:49	2
1527050	99	35	16,2	cyclictest	0	-21	swapper/2	09:00:00	2
1527047	99	35	30,4	cyclictest	1797069	-21	kworker/u8:0+events_unbound	12:27:50	1
1527047	99	35	30,4	cyclictest	1648067	-21	kworker/u8:1+events_unbound	10:17:51	1
1527047	99	35	28,4	cyclictest	1563837	-21	kworker/u8:1+flush-8:0	07:52:55	1
1527050	99	34	3,8	cyclictest	1837098	-21	apt-get	12:22:45	2
1527047	99	34	24,7	cyclictest	275	-21	systemd-journal	08:20:01	1
1527045	99	34	30,3	cyclictest	1290803	-21	kworker/u8:2+events_unbound	08:30:00	0
1527045	99	34	25,7	cyclictest	1618163	-21	latency_hist	08:40:01	0
1527050	99	33	19,12	cyclictest	1788310	-21	grep	11:32:54	2
1527050	99	33	16,3	cyclictest	1799471	-21	sort	11:42:55	2
1527047	99	33	29,3	cyclictest	1290803	-21	kworker/u8:2+flush-8:0	08:53:06	1
1527047	99	33	29,3	cyclictest	1290803	-21	kworker/u8:2+events_unbound	08:08:07	1
1527047	99	33	28,3	cyclictest	1737322	-21	kworker/u8:1+events_unbound	11:12:52	1
1527047	99	33	28,3	cyclictest	1511934	-21	kworker/u8:3+events_unbound	07:57:55	1
1527047	99	33	27,5	cyclictest	1648067	-21	kworker/u8:1+flush-8:0	09:52:50	1
1527047	99	33	27,4	cyclictest	1707442	-21	kworker/u8:3+events_unbound	11:32:54	1
1527047	99	33	27,4	cyclictest	1563837	-21	kworker/u8:1+flush-8:0	08:28:03	1
1527047	99	33	27,4	cyclictest	1511934	-21	kworker/u8:3+events_unbound	07:42:53	1
1527047	99	33	27,4	cyclictest	1511934	-21	kworker/u8:3+events_unbound	07:42:53	1
1527047	99	33	22,9	cyclictest	1567781	-21	ntpq	07:47:59	1
1527050	99	32	15,3	cyclictest	0	-21	swapper/2	09:15:01	2
1527050	99	32	15,2	cyclictest	1777050	-21	cron	11:20:00	2
1527050	99	32	15,2	cyclictest	0	-21	swapper/2	11:58:04	2
1527050	99	32	1,12	cyclictest	1534277	-21	apt-get	07:17:47	2
1527047	99	32	28,3	cyclictest	1517310	-21	kworker/u8:0+flush-8:0	07:22:51	1
1527047	99	32	28,2	cyclictest	1531924	-21	systemd-run	07:15:00	1
1527047	99	32	26,4	cyclictest	1549120	-21	apt-get	07:32:47	1
1527045	99	32	9,10	cyclictest	1727120	-21	expr	10:28:05	0
1527045	99	32	25,6	cyclictest	1678379	-21	aten2_r5power_v	09:42:49	0
1527045	99	32	23,6	cyclictest	275	-21	systemd-journal	07:17:15	0
1527050	99	31	14,2	cyclictest	0	-21	swapper/2	10:57:47	2
1527047	99	31	26,3	cyclictest	1693326	-21	cpuspeed_turbos	09:57:48	1
1527045	99	31	27,3	cyclictest	1687720	-21	systemd-run	09:50:00	0
1527045	99	31	26,3	cyclictest	1707442	-21	kworker/u8:3+events_unbound	10:12:53	0
1527045	99	31	25,5	cyclictest	1752339	-21	cron	10:55:00	0
1527045	99	31	24,5	cyclictest	1846540	-21	latency_hist	12:30:00	0
1527045	99	31	24,5	cyclictest	1639005	-21	irqcore	09:02:54	0
1527045	99	31	20,9	cyclictest	275	-21	systemd-journal	08:17:50	0
1527050	99	30	25,3	cyclictest	1667689	-21	unixbench_singl	09:28:07	2
1527047	99	30	25,3	cyclictest	1628090	-21	systemd-run	08:50:00	1
1527047	99	30	23,5	cyclictest	275	-21	systemd-journal	07:39:14	1
1527045	99	30	25,4	cyclictest	1598627	-21	kworker/u8:0+flush-8:0	09:07:56	0
1527045	99	30	25,3	cyclictest	1608832	-21	aten2_r5power_v	08:32:48	0
1527045	99	30	24,4	cyclictest	1579410	-21	irqcore	08:02:56	0
1527045	99	30	23,5	cyclictest	1601009	-21	kthreadcore	08:22:56	0
1527045	99	30	22,6	cyclictest	1531906	-21	latency_hist	07:15:01	0
1527045	99	30	21,7	cyclictest	1746666	-21	ntpq	10:48:00	0
1527045	99	30	1,8	cyclictest	1654374	-21	irqstats	09:17:56	0
1522334	2	30	4,9	sleep2	0	-21	swapper/2	07:06:50	2
1527050	99	29	16,2	cyclictest	0	-21	swapper/2	11:07:59	2
1527050	99	29	11,7	cyclictest	1856206	-21	unixbench_singl	12:38:06	2
1527047	99	29	25,3	cyclictest	1511934	-21	kworker/u8:3+flush-8:0	08:17:57	1
1527047	99	29	24,4	cyclictest	1707442	-21	kworker/u8:3+flush-8:0	11:07:53	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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