OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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
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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: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot5s.osadl.org (updated Tue Jul 21, 2026 00:44:50)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1583015	99	52	39,6	cyclictest	1686505	-21	kworker/u8:1+events_unbound	00:12:56	1
1583015	99	52	39,6	cyclictest	1686505	-21	kworker/u8:1+events_unbound	00:12:55	1
1583015	99	48	37,8	cyclictest	1689648	-21	grep	00:15:25	1
1583024	99	44	30,11	cyclictest	39	1	ktimers/3	00:25:13	3
1583011	99	44	38,4	cyclictest	1652005	-21	kworker/u8:2+events_unbound	22:52:48	0
1583020	99	43	36,4	cyclictest	1652403	-21	auditctl	22:29:59	2
1583024	99	42	34,4	cyclictest	1662618	-21	cron	23:00:01	3
1583024	99	42	33,6	cyclictest	1614465	-21	sendmail	20:40:00	3
1583011	99	42	34,5	cyclictest	1600598	-21	munin-plugin-st	20:00:01	0
1583024	99	41	34,4	cyclictest	1592068	-21	cron	19:35:01	3
1583024	99	41	31,6	cyclictest	208	-21	systemd-logind	22:27:46	3
1583024	99	40	30,7	cyclictest	1628109	-21	sh	21:20:01	3
1583015	99	40	34,4	cyclictest	1650504	-21	munin-plugin-st	22:25:01	1
1583015	99	40	30,6	cyclictest	0	-21	swapper/1	20:50:25	1
1583024	99	39	33,4	cyclictest	1617727	-21	kworker/u8:2+events_unbound	21:32:42	3
1583015	99	39	32,4	cyclictest	1600613	-21	sendmail	20:00:00	1
1583015	99	39	30,6	cyclictest	1663877	-21	unixbench_multi	23:00:26	1
1583011	99	39	32,5	cyclictest	1609030	-21	kworker/u8:1+events_unbound	20:52:34	0
1583011	99	39	30,5	cyclictest	1	-21	systemd	20:12:16	0
1583011	99	39	18,5	cyclictest	13	1	rcu_preempt	22:15:12	0
1583024	99	38	29,6	cyclictest	1686035	-21	grep	00:05:24	3
1583015	99	38	31,5	cyclictest	1652005	-21	kworker/u8:2+events_unbound	22:27:46	1
1583011	99	38	32,4	cyclictest	1672497	-21	kworker/u8:2+events_unbound	23:47:50	0
1583024	99	37	27,6	cyclictest	0	-21	swapper/3	23:25:00	3
1583020	99	37	31,3	cyclictest	0	-21	swapper/2	21:59:59	2
1583020	99	37	29,5	cyclictest	0	-21	swapper/2	22:25:00	2
1583015	99	37	30,5	cyclictest	1609030	-21	kworker/u8:1+events_unbound	20:32:31	1
1583015	99	37	30,5	cyclictest	1609030	-21	kworker/u8:1+events_unbound	20:32:31	1
1583015	99	37	27,6	cyclictest	0	-21	swapper/1	00:20:27	1
1583015	99	37	25,7	cyclictest	0	-21	swapper/1	22:00:25	1
1583015	99	37	16,5	cyclictest	13	1	rcu_preempt	00:00:11	1
1583011	99	37	28,4	cyclictest	0	-21	swapper/0	19:20:25	0
1583011	99	37	27,7	cyclictest	12	1	ktimers/0	19:25:15	0
1583011	99	37	16,17	cyclictest	0	-21	swapper/0	20:30:01	0
1583024	99	36	28,5	cyclictest	0	-21	swapper/3	20:45:00	3
1583024	99	36	27,6	cyclictest	0	-21	swapper/3	21:15:02	3
1583020	99	36	29,4	cyclictest	0	-21	swapper/2	21:45:00	2
1583015	99	36	28,5	cyclictest	1604010	-21	sh	20:10:01	1
1583015	99	36	25,7	cyclictest	0	-21	swapper/1	20:15:02	1
1583015	99	36	24,7	cyclictest	0	-21	swapper/1	19:35:26	1
1583015	99	36	24,7	cyclictest	0	-21	swapper/1	19:35:25	1
1583011	99	36	30,4	cyclictest	1694924	-21	kworker/u8:3+events_unbound	00:37:58	0
1583011	99	36	28,6	cyclictest	138	50	irq/36-mmc1	21:20:01	0
1583024	99	35	28,5	cyclictest	1596876	-21	kworker/u8:2+events_unbound	19:57:14	3
1583024	99	35	27,4	cyclictest	0	-21	swapper/3	21:40:01	3
1583024	99	35	26,7	cyclictest	438	-21	cron	19:20:00	3
1583020	99	35	28,4	cyclictest	0	-21	swapper/2	23:25:00	2
1583020	99	35	26,6	cyclictest	1586547	-21	unixbench_singl	19:15:27	2
1583020	99	35	26,5	cyclictest	0	-21	swapper/2	21:05:01	2
1583020	99	35	25,7	cyclictest	438	-21	cron	23:30:00	2
1583020	99	35	25,7	cyclictest	438	-21	cron	23:30:00	2
1583020	99	35	25,6	cyclictest	0	-21	swapper/2	22:30:25	2
1583015	99	35	25,6	cyclictest	0	-21	swapper/1	22:00:00	1
1583011	99	35	29,4	cyclictest	1617727	-21	kworker/u8:2+events_unbound	21:12:40	0
1583011	99	35	0,8	cyclictest	11	-21	ksoftirqd/0	22:00:13	0
1583024	99	34	24,6	cyclictest	0	-21	swapper/3	22:50:27	3
1583020	99	34	24,8	cyclictest	0	-21	swapper/2	23:00:14	2
1583020	99	34	24,6	cyclictest	0	-21	swapper/2	23:50:27	2
1583015	99	34	22,7	cyclictest	0	-21	swapper/1	21:40:17	1
1583015	99	34	14,8	cyclictest	1598755	-21	kworker/u8:3+events_unbound	20:18:06	1
1583015	99	34	1,13	cyclictest	24	-21	ksoftirqd/1	23:55:11	1
1583011	99	34	26,4	cyclictest	0	-21	swapper/0	22:35:26	0
1583011	99	34	25,6	cyclictest	0	-21	swapper/0	21:00:00	0
1583011	99	34	1,8	cyclictest	11	-21	ksoftirqd/0	20:20:13	0
1583020	99	33	26,4	cyclictest	0	-21	swapper/2	22:15:01	2
1583020	99	33	24,6	cyclictest	1629815	-21	cron	21:25:01	2
1583020	99	33	23,6	cyclictest	1614464	-21	sendmail	20:39:59	2
1583020	99	33	23,6	cyclictest	0	-21	swapper/2	19:45:01	2
1583015	99	33	27,4	cyclictest	1595149	-21	kworker/u8:0+events_unbound	19:42:11	1
1583015	99	33	26,3	cyclictest	0	-21	swapper/1	00:25:25	1
1583015	99	33	25,4	cyclictest	0	-21	swapper/1	21:00:26	1
1583015	99	33	25,4	cyclictest	0	-21	swapper/1	19:10:15	1
1583015	99	33	24,6	cyclictest	1646854	-21	cron	22:15:01	1
1583015	99	33	22,7	cyclictest	0	-21	swapper/1	23:30:26	1
1583015	99	33	22,7	cyclictest	0	-21	swapper/1	23:30:26	1
1583015	99	33	22,6	cyclictest	0	-21	swapper/1	23:40:23	1
1583015	99	33	16,5	cyclictest	1652005	-21	kworker/u8:2+events_unbound	22:35:39	1
1583011	99	33	2,8	cyclictest	11	-21	ksoftirqd/0	00:10:13	0
1583011	99	33	2,8	cyclictest	11	-21	ksoftirqd/0	00:10:12	0
1583011	99	33	27,4	cyclictest	1664317	-21	kworker/u8:1+events_unbound	23:12:49	0
1583011	99	33	14,12	cyclictest	204	-21	dbus-daemon	21:37:41	0
1583024	99	32	25,4	cyclictest	1690132	-21	kthreadd	00:20:00	3
1583020	99	32	25,3	cyclictest	0	-21	swapper/2	22:40:17	2
1583015	99	32	24,4	cyclictest	0	-21	swapper/1	00:35:16	1
1583015	99	32	22,6	cyclictest	0	-21	swapper/1	23:15:26	1
1583015	99	32	22,6	cyclictest	0	-21	swapper/1	23:05:27	1
1583015	99	32	22,6	cyclictest	0	-21	swapper/1	19:25:01	1
1583015	99	32	12,3	cyclictest	13	1	rcu_preempt	20:20:11	1
1583011	99	32	21,7	cyclictest	12	1	ktimers/0	21:25:13	0
1583011	99	32	18,10	cyclictest	204	-21	dbus-daemon	19:37:09	0
1583011	99	32	18,10	cyclictest	204	-21	dbus-daemon	19:37:08	0
1583011	99	32	14,13	cyclictest	204	-21	dbus-daemon	20:37:30	0
1583024	99	31	23,5	cyclictest	0	-21	swapper/3	23:55:00	3
1583024	99	31	22,6	cyclictest	1646450	-21	unixbench_singl	22:10:26	3
1583024	99	31	21,6	cyclictest	0	-21	swapper/3	22:00:26	3
1583024	99	31	21,6	cyclictest	0	-21	swapper/3	20:10:25	3
1583024	99	31	21,5	cyclictest	0	-21	swapper/3	22:20:26	3
1583024	99	31	20,6	cyclictest	0	-21	swapper/3	22:20:00	3
1583024	99	31	19,7	cyclictest	0	-21	swapper/3	19:25:28	3
1583020	99	31	24,4	cyclictest	1633212	-21	cron	21:35:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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