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 Sun Jul 12, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
634235	2	162	0,3	sleep3	45	1	irq_work/3	19:15:19	3
785226	2	77	0,5	sleep0	0	-21	swapper/0	21:45:24	0
814469	2	68	0,3	chrt	28	1	rcuc/1	22:15:11	1
623209	99	60	57,2	cyclictest	693487	-21	kworker/u8:2+events_unbound	21:50:26	1
623209	99	50	45,4	cyclictest	627723	-21	kworker/u8:1+events_unbound	19:15:26	1
623214	99	49	41,6	cyclictest	1704890	-21	systemd-journal	23:55:01	2
623209	99	47	36,8	cyclictest	680665	-21	apt-get	20:05:01	1
623207	99	47	35,4	cyclictest	627723	-21	kworker/u8:1+flush-8:0	20:30:21	0
623209	99	45	41,3	cyclictest	749960	-21	kworker/u8:1+flush-8:0	22:55:23	1
623209	99	45	40,4	cyclictest	881323	-21	kworker/u8:3+flush-8:0	00:25:22	1
623209	99	44	39,4	cyclictest	881323	-21	kworker/u8:3+events_unbound	23:25:20	1
623207	99	44	38,4	cyclictest	679571	-21	kworker/u8:0+events_unbound	20:10:07	0
623207	99	44	30,12	cyclictest	710577	-21	kworker/u8:3+flush-8:0	20:55:19	0
623209	99	43	40,2	cyclictest	693487	-21	kworker/u8:2+flush-8:0	20:40:17	1
623209	99	43	38,4	cyclictest	820948	-21	kworker/u8:3+events_unbound	22:30:23	1
623207	99	43	37,4	cyclictest	608777	-21	kworker/u8:2+flush-8:0	19:10:21	0
623209	99	42	38,3	cyclictest	693487	-21	kworker/u8:2+flush-8:0	20:45:21	1
623209	99	42	38,3	cyclictest	693487	-21	kworker/u8:2+flush-8:0	20:45:20	1
623209	99	42	38,3	cyclictest	3975468	-21	kworker/u8:3+flush-8:0	20:05:09	1
623209	99	42	37,4	cyclictest	649927	-21	kworker/u8:0+events_unbound	19:35:37	1
623209	99	42	34,6	cyclictest	1704890	-21	systemd-journal	20:14:59	1
623209	99	42	33,7	cyclictest	665188	-21	apt-get	19:46:25	1
623207	99	42	36,4	cyclictest	881323	-21	kworker/u8:3+flush-8:0	00:05:27	0
623207	99	42	36,4	cyclictest	791411	-21	kworker/u8:0+flush-8:0	22:10:11	0
621302	2	42	11,2	sleep1	0	-21	swapper/1	19:05:13	1
623214	99	41	35,4	cyclictest	945215	-21	kworker/u8:0+flush-8:0	00:30:13	2
623209	99	41	37,3	cyclictest	815580	-21	kworker/u8:2+flush-8:0	22:50:10	1
623207	99	41	35,5	cyclictest	881323	-21	kworker/u8:3+flush-8:0	00:25:18	0
623207	99	41	35,5	cyclictest	749960	-21	kworker/u8:1+events_unbound	22:45:21	0
623207	99	41	29,10	cyclictest	915582	-21	kworker/u8:2+flush-8:0	00:15:16	0
623209	99	40	36,3	cyclictest	945215	-21	kworker/u8:0+flush-8:0	00:35:06	1
623209	99	40	36,3	cyclictest	856721	-21	kworker/u8:0+flush-8:0	23:20:24	1
623209	99	40	36,3	cyclictest	749960	-21	kworker/u8:1+events_unbound	21:20:08	1
623209	99	40	36,3	cyclictest	749960	-21	kworker/u8:1+events_unbound	21:15:21	1
623209	99	40	36,3	cyclictest	627723	-21	kworker/u8:1+events_unbound	19:55:17	1
623207	99	40	36,3	cyclictest	693487	-21	kworker/u8:2+flush-8:0	21:30:17	0
623207	99	40	34,4	cyclictest	945215	-21	kworker/u8:0+flush-8:0	00:35:07	0
623207	99	40	34,4	cyclictest	815580	-21	kworker/u8:2+flush-8:0	22:35:22	0
623207	99	40	30,8	cyclictest	884824	-21	ntpq	23:25:15	0
623214	99	39	33,4	cyclictest	693487	-21	kworker/u8:2+flush-8:0	21:35:17	2
623209	99	39	36,2	cyclictest	749960	-21	kworker/u8:1+events_unbound	22:25:25	1
623209	99	39	35,3	cyclictest	881323	-21	kworker/u8:3+events_unbound	00:08:28	1
623209	99	39	35,3	cyclictest	749960	-21	kworker/u8:1+flush-8:0	21:55:11	1
623209	99	39	35,3	cyclictest	749960	-21	kworker/u8:1+flush-8:0	21:55:10	1
623209	99	39	35,3	cyclictest	710577	-21	kworker/u8:3+events_unbound	21:10:25	1
623209	99	39	35,3	cyclictest	710577	-21	kworker/u8:3+events_unbound	20:50:16	1
623209	99	39	35,3	cyclictest	693487	-21	kworker/u8:2+flush-8:0	21:37:34	1
623209	99	39	35,3	cyclictest	627723	-21	kworker/u8:1+flush-8:0	20:25:07	1
623209	99	39	27,9	cyclictest	1704890	-21	systemd-journal	22:45:01	1
623207	99	39	35,3	cyclictest	815580	-21	kworker/u8:2+flush-8:0	22:20:07	0
623207	99	39	34,3	cyclictest	749960	-21	kworker/u8:1+flush-8:0	21:55:18	0
623207	99	39	34,3	cyclictest	749960	-21	kworker/u8:1+flush-8:0	21:55:17	0
623207	99	39	34,3	cyclictest	679571	-21	kworker/u8:0+flush-8:0	20:25:20	0
623207	99	39	29,8	cyclictest	749593	-21	ntpq	21:10:17	0
623209	99	38	35,2	cyclictest	749960	-21	kworker/u8:1+events_unbound	22:45:04	1
623209	99	38	34,3	cyclictest	649927	-21	kworker/u8:0+events_unbound	19:40:22	1
623209	99	38	34,2	cyclictest	749960	-21	kworker/u8:1+events_unbound	21:43:26	1
623209	99	38	33,4	cyclictest	730496	-21	kworker/u8:0+flush-8:0	20:55:08	1
623209	99	38	31,5	cyclictest	1704890	-21	systemd-journal	19:50:24	1
623209	99	38	24,11	cyclictest	1704890	-21	systemd-journal	23:08:23	1
623207	99	38	29,7	cyclictest	894756	-21	ntpq	23:35:14	0
623209	99	37	33,3	cyclictest	870515	-21	kworker/u8:2+events_unbound	23:40:23	1
623209	99	37	23,9	cyclictest	835853	-21	apt-get	22:40:01	1
623207	99	37	33,3	cyclictest	627723	-21	kworker/u8:1+flush-8:0	19:45:12	0
623207	99	37	32,3	cyclictest	750196	-21	kworker/u8:4+events_unbound	22:15:14	0
623207	99	37	28,7	cyclictest	1704890	-21	systemd-journal	23:05:00	0
623214	99	36	26,8	cyclictest	1704890	-21	systemd-journal	22:25:01	2
623209	99	36	33,2	cyclictest	911552	-21	irqrtprio	23:55:10	1
623209	99	36	32,3	cyclictest	915582	-21	kworker/u8:2+events_unbound	00:00:09	1
623209	99	36	28,6	cyclictest	805123	-21	ntpq	22:05:17	1
623209	99	36	28,5	cyclictest	694503	-21	cut	20:15:11	1
623207	99	36	31,3	cyclictest	3975468	-21	kworker/u8:3+flush-8:0	20:05:20	0
623209	99	35	31,3	cyclictest	881323	-21	kworker/u8:3+events_unbound	00:14:38	1
623209	99	35	31,3	cyclictest	791411	-21	kworker/u8:0+events_unbound	22:01:23	1
623209	99	35	31,3	cyclictest	749960	-21	kworker/u8:1+events_unbound	21:25:25	1
623207	99	35	31,3	cyclictest	693487	-21	kworker/u8:2+events_unbound	21:35:22	0
623207	99	35	29,4	cyclictest	919770	-21	kworker/u8:4+flush-8:0	00:00:16	0
623209	99	34	30,3	cyclictest	910012	-21	kworker/u8:1+events_unbound	00:30:07	1
623209	99	34	30,3	cyclictest	881323	-21	kworker/u8:3+events_unbound	23:30:10	1
623209	99	34	30,3	cyclictest	710577	-21	kworker/u8:3+events_unbound	21:01:26	1
623209	99	34	30,3	cyclictest	710577	-21	kworker/u8:3+events_unbound	20:35:17	1
623209	99	34	28,4	cyclictest	930995	-21	apt-get	00:15:03	1
623209	99	34	21,10	cyclictest	1704890	-21	systemd-journal	19:24:59	1
623207	99	34	29,4	cyclictest	791411	-21	kworker/u8:0+flush-8:0	22:05:20	0
623207	99	34	28,4	cyclictest	710577	-21	kworker/u8:3+flush-8:0	21:00:07	0
623207	99	34	26,6	cyclictest	714689	-21	ntpq	20:35:17	0
623214	99	33	28,3	cyclictest	815580	-21	kworker/u8:2+flush-8:0	22:40:06	2
623214	99	33	24,7	cyclictest	1704890	-21	systemd-journal	19:55:00	2
623209	99	33	30,2	cyclictest	856721	-21	kworker/u8:0+events_unbound	23:00:12	1
623209	99	33	27,4	cyclictest	806608	-21	fschecks_count	22:10:06	1
623209	99	33	19,11	cyclictest	1704890	-21	systemd-journal	19:31:25	1
623207	99	33	28,4	cyclictest	693487	-21	kworker/u8:2+events_unbound	21:05:25	0
623207	99	33	28,3	cyclictest	749960	-21	kworker/u8:1+events_unbound	22:50:21	0
623207	99	33	27,4	cyclictest	856721	-21	kworker/u8:0+flush-8:0	23:20:24	0
623207	99	33	27,4	cyclictest	856721	-21	kworker/u8:0+events_unbound	23:15:17	0
623207	99	33	27,4	cyclictest	660247	-21	gpgv	19:45:00	0
623207	99	33	24,7	cyclictest	866172	-21	/usr/sbin/munin	23:10:17	0
817539	2	32	0,5	sleep3	45	1	irq_work/3	22:20:10	3
623214	99	32	28,3	cyclictest	693487	-21	kworker/u8:2+flush-8:0	21:40:07	2
623209	99	32	28,3	cyclictest	749960	-21	kworker/u8:1+events_unbound	23:10:18	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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