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 Fri Sep 04, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1857137	99	164	151,8	cyclictest	2151968	-21	apt-get	12:05:03	2
1857135	99	109	105,2	cyclictest	0	-21	swapper/1	12:05:03	1
2002452	2	66	0,3	sleep2	0	-21	swapper/2	09:32:39	2
1857129	99	66	52,13	cyclictest	0	-21	swapper/0	12:05:03	0
1857129	99	65	53,9	cyclictest	275	-21	systemd-journal	09:40:00	0
1867717	2	60	0,2	sleep3	47	1	rcuc/3	07:17:36	3
2013949	2	54	0,4	sleep1	0	-21	swapper/1	09:47:30	1
1857135	99	54	50,3	cyclictest	1824831	-21	kworker/u8:3+events_unbound	07:17:46	1
1857135	99	52	44,6	cyclictest	2087787	-21	kworker/u8:1+events_unbound	11:02:33	1
1857129	99	52	46,4	cyclictest	1967983	-21	kworker/u8:2+events_unbound	09:12:31	0
1857137	99	51	36,13	cyclictest	1873943	-21	apt-get	07:25:00	2
1857137	99	51	29,20	cyclictest	275	-21	systemd-journal	09:30:00	2
1857129	99	50	46,3	cyclictest	1857303	-21	kworker/u8:1+events_unbound	07:20:01	0
1857135	99	49	45,3	cyclictest	1869376	-21	kworker/u8:0+flush-8:0	07:27:31	1
1857135	99	49	44,4	cyclictest	1899239	-21	kworker/u8:0+events_unbound	08:58:03	1
1857129	99	49	44,3	cyclictest	2102293	-21	kworker/u8:0+events_unbound	11:20:00	0
1857129	99	49	41,6	cyclictest	2112718	-21	/usr/sbin/munin	11:27:45	0
1931574	2	48	0,4	sleep3	48	1	ktimers/3	08:22:33	3
1857135	99	48	44,3	cyclictest	2003108	-21	kworker/u8:0+events_unbound	09:52:28	1
1857135	99	48	40,6	cyclictest	2042809	-21	kworker/u8:0+events_unbound	10:47:33	1
1857135	99	48	40,6	cyclictest	1924099	-21	/usr/sbin/munin	08:17:43	1
1857135	99	48	40,6	cyclictest	1924099	-21	/usr/sbin/munin	08:17:43	1
1857135	99	48	40,5	cyclictest	2017855	-21	kworker/u8:3+events_unbound	10:02:38	1
1857129	99	48	39,7	cyclictest	1963982	-21	diskstats	08:57:30	0
1857137	99	47	37,8	cyclictest	275	-21	systemd-journal	10:25:00	2
1857135	99	47	36,8	cyclictest	275	-21	systemd-journal	12:16:55	1
1857129	99	47	42,4	cyclictest	2042809	-21	kworker/u8:0+flush-8:0	10:35:00	0
2014978	2	46	0,4	chrt	13	-21	ksoftirqd/0	09:47:33	0
1857137	99	46	36,8	cyclictest	275	-21	systemd-journal	09:10:01	2
1857135	99	46	43,2	cyclictest	2176726	-21	kworker/u8:0+events_unbound	12:32:29	1
1857135	99	46	42,3	cyclictest	2112538	-21	kworker/u8:3+flush-8:0	11:30:02	1
1857135	99	46	42,3	cyclictest	1967983	-21	kworker/u8:2+flush-8:0	09:42:28	1
1857135	99	45	41,3	cyclictest	2102293	-21	kworker/u8:0+events_unbound	11:17:33	1
1857135	99	45	41,3	cyclictest	2087787	-21	kworker/u8:1+flush-8:0	12:02:45	1
1857135	99	45	41,3	cyclictest	2087787	-21	kworker/u8:1+flush-8:0	11:49:55	1
1857135	99	45	41,3	cyclictest	2058245	-21	kworker/u8:3+flush-8:0	10:50:32	1
1857135	99	45	41,3	cyclictest	2017855	-21	kworker/u8:3+events_unbound	10:05:02	1
1857135	99	45	41,3	cyclictest	1967983	-21	kworker/u8:2+flush-8:0	09:12:30	1
1857135	99	45	41,3	cyclictest	1883977	-21	kworker/u8:4+flush-8:0	08:02:25	1
1857135	99	45	41,3	cyclictest	1869376	-21	kworker/u8:0+flush-8:0	07:30:56	1
1857129	99	45	40,3	cyclictest	2112538	-21	kworker/u8:3+events_unbound	11:32:44	0
1857135	99	44	40,3	cyclictest	2087787	-21	kworker/u8:1+events_unbound	11:37:31	1
1857135	99	44	40,3	cyclictest	1914104	-21	kworker/u8:1+flush-8:0	08:07:27	1
1857129	99	44	33,8	cyclictest	275	-21	systemd-journal	11:00:01	0
1857135	99	43	39,3	cyclictest	2126985	-21	kworker/u8:0+events_unbound	11:52:27	1
1857135	99	43	39,3	cyclictest	1978208	-21	kworker/u8:1+events_unbound	09:32:42	1
1857135	99	43	39,3	cyclictest	1914104	-21	kworker/u8:1+flush-8:0	08:13:56	1
2084973	2	42	0,6	sleep2	0	-21	swapper/2	10:57:38	2
2068863	2	42	0,4	sleep2	0	-21	swapper/2	10:42:33	2
2068863	2	42	0,4	sleep2	0	-21	swapper/2	10:42:33	2
1857137	99	42	35,5	cyclictest	2136322	-21	journal-offline	11:47:40	2
1857135	99	42	38,3	cyclictest	2102293	-21	kworker/u8:0+flush-8:0	11:22:40	1
1857135	99	42	38,3	cyclictest	2087787	-21	kworker/u8:1+events_unbound	11:57:51	1
1857135	99	42	38,3	cyclictest	2058245	-21	kworker/u8:3+events_unbound	10:57:31	1
1857135	99	42	38,3	cyclictest	2042809	-21	kworker/u8:0+events_unbound	10:22:28	1
1857135	99	42	38,3	cyclictest	1978208	-21	kworker/u8:1+events_unbound	09:37:27	1
1857135	99	42	38,3	cyclictest	1938813	-21	kworker/u8:2+flush-8:0	08:47:33	1
1857129	99	42	40,1	cyclictest	1998261	-21	/usr/sbin/munin	09:30:01	0
1857129	99	42	32,8	cyclictest	1927819	-21	ntpq	08:17:37	0
1857129	99	42	32,8	cyclictest	1927819	-21	ntpq	08:17:37	0
1857135	99	41	37,3	cyclictest	2077866	-21	kworker/u8:2+events_unbound	12:27:29	1
1857135	99	41	37,3	cyclictest	1988562	-21	kworker/u8:3+events_unbound	09:28:08	1
1857135	99	41	37,3	cyclictest	1967983	-21	kworker/u8:2+flush-8:0	09:00:32	1
1857135	99	41	37,3	cyclictest	1899239	-21	kworker/u8:0+flush-8:0	07:52:36	1
1857129	99	41	31,8	cyclictest	1878349	-21	ntpq	07:27:37	0
1857137	99	40	25,13	cyclictest	2022695	-21	unixbench_multi	09:52:43	2
1857135	99	40	36,3	cyclictest	2087787	-21	kworker/u8:1+events_unbound	12:12:44	1
1857137	99	39	25,12	cyclictest	1879915	-21	fschecks_time	07:32:30	2
1857135	99	39	36,2	cyclictest	2042809	-21	kworker/u8:0+events_unbound	10:37:41	1
1857135	99	39	35,3	cyclictest	1899239	-21	kworker/u8:0+flush-8:0	08:52:31	1
1857135	99	39	35,3	cyclictest	1899239	-21	kworker/u8:0+events_unbound	08:37:28	1
1857135	99	39	33,4	cyclictest	2043429	-21	apt-get	10:17:29	1
1857129	99	39	32,5	cyclictest	275	-21	systemd-journal	08:50:01	0
1857129	99	39	28,9	cyclictest	275	-21	systemd-journal	07:35:00	0
1857137	99	38	31,5	cyclictest	275	-21	systemd-journal	10:02:15	2
1857137	99	38	28,8	cyclictest	275	-21	systemd-journal	08:34:55	2
1857137	99	38	16,19	cyclictest	275	-21	systemd-journal	08:23:54	2
1857135	99	38	34,3	cyclictest	2087787	-21	kworker/u8:1+events_unbound	11:12:31	1
1857135	99	38	34,3	cyclictest	2077866	-21	kworker/u8:2+events_unbound	11:08:04	1
1857135	99	38	34,3	cyclictest	1071218	-21	kworker/u8:0+flush-8:0	07:10:01	1
1857129	99	38	34,3	cyclictest	1883977	-21	kworker/u8:4+flush-8:0	07:47:43	0
1857129	99	38	31,5	cyclictest	2087787	-21	kworker/u8:1+flush-8:0	12:17:26	0
1857129	99	38	29,7	cyclictest	275	-21	systemd-journal	08:15:00	0
1857135	99	37	33,3	cyclictest	1824831	-21	kworker/u8:3+flush-8:0	08:27:30	1
1857135	99	37	33,3	cyclictest	1824831	-21	kworker/u8:3+flush-8:0	07:47:38	1
1857135	99	37	32,4	cyclictest	2028083	-21	kworker/u8:1+events_unbound	10:27:45	1
1857135	99	37	32,3	cyclictest	1993297	-21	turbostat.cron	09:25:00	1
1857129	99	37	33,3	cyclictest	1883977	-21	kworker/u8:4+flush-8:0	07:52:41	0
1857129	99	37	32,4	cyclictest	2126985	-21	kworker/u8:0+flush-8:0	11:52:34	0
1857135	99	36	32,3	cyclictest	2087787	-21	kworker/u8:1+flush-8:0	12:22:31	1
1857129	99	36	29,5	cyclictest	2077866	-21	kworker/u8:2+flush-8:0	12:15:00	0
2009049	2	35	0,2	sleep2	37	1	rcuc/2	09:42:30	2
1857137	99	35	28,5	cyclictest	2181594	-21	grep	12:32:45	2
1857137	99	35	13,2	cyclictest	0	-21	swapper/2	12:37:30	2
1857135	99	35	32,2	cyclictest	1824831	-21	kworker/u8:3+events_unbound	07:22:28	1
1857135	99	35	31,3	cyclictest	2126985	-21	kworker/u8:0+events_unbound	11:41:55	1
1857135	99	35	31,3	cyclictest	1938813	-21	kworker/u8:2+events_unbound	08:40:56	1
1857135	99	35	31,3	cyclictest	1899239	-21	kworker/u8:0+flush-8:0	08:24:31	1
1857135	99	35	26,7	cyclictest	275	-21	systemd-journal	07:36:50	1
1857129	99	35	29,4	cyclictest	1938813	-21	kworker/u8:2+flush-8:0	08:42:42	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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