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 Dec 10, 2025 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2040685	2	304	0,2	sleep3	45	1	irq_work/3	21:26:13	3
2168083	2	204	0,3	sleep3	586	-21	kworker/3:2-events	23:36:07	3
1929712	2	76	0,2	sleep3	47	1	rcuc/3	19:35:01	3
2135469	2	59	0,6	sleep2	0	-21	swapper/2	23:01:11	2
2173758	2	58	0,4	chrt	52	1	rcuop/3	23:41:09	0
1902696	99	56	46,8	cyclictest	2186223	-21	ntpq	23:51:13	1
1902693	99	54	50,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	21:06:07	0
1902693	99	53	46,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:21:08	0
1902693	99	52	48,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:26:26	0
1902696	99	51	32,15	cyclictest	282	-21	systemd-journal	22:46:28	1
1902696	99	51	31,17	cyclictest	2009673	-21	irqrtprio	20:56:10	1
1902693	99	50	46,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	22:06:23	0
1902696	99	49	37,8	cyclictest	282	-21	systemd-journal	23:16:29	1
1902696	99	48	29,16	cyclictest	2101999	-21	ntpq	22:26:17	1
1902693	99	48	36,9	cyclictest	282	-21	systemd-journal	00:35:01	0
1902696	99	47	37,8	cyclictest	2181321	-21	ntpq	23:46:14	1
1902696	99	47	37,8	cyclictest	2181321	-21	ntpq	23:46:13	1
1902696	99	47	30,14	cyclictest	2048159	-21	cron	21:35:00	1
1902696	99	47	21,8	cyclictest	282	-21	systemd-journal	20:00:01	1
1902700	99	46	40,4	cyclictest	1882982	-21	kworker/u8:3+flush-8:0	19:15:06	2
1902696	99	46	38,5	cyclictest	2107776	-21	latency_hist	22:35:01	1
1902693	99	46	42,3	cyclictest	2192285	-21	kworker/u8:3+events_unbound	00:18:28	0
1902693	99	46	42,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	22:36:06	0
1902693	99	45	41,3	cyclictest	1924167	-21	kworker/u8:3+events_unbound	20:05:29	0
1902696	99	44	35,7	cyclictest	2088260	-21	/usr/sbin/munin	22:16:12	1
1902693	99	44	40,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	20:14:31	0
1902693	99	44	37,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	20:41:02	0
1902696	99	43	19,6	cyclictest	2172295	-21	latency_hist	23:40:01	1
1902693	99	43	39,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	23:02:30	0
1902693	99	43	39,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	22:41:18	0
1902693	99	43	39,3	cyclictest	1924167	-21	kworker/u8:3+events_unbound	19:36:54	0
1902693	99	43	39,3	cyclictest	1882982	-21	kworker/u8:3+events_unbound	19:10:29	0
1902700	99	42	37,4	cyclictest	1974257	-21	kworker/u8:3+flush-8:0	20:26:20	2
1902693	99	42	38,3	cyclictest	2192285	-21	kworker/u8:3+events_unbound	00:38:30	0
1902693	99	42	38,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	23:37:30	0
1902693	99	42	38,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	22:58:30	0
1902693	99	42	38,3	cyclictest	1974257	-21	kworker/u8:3+events_unbound	20:21:38	0
1902693	99	42	38,3	cyclictest	1964354	-21	kworker/u8:1+events_unbound	20:36:23	0
1902693	99	42	38,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	19:15:29	0
1902696	99	41	35,4	cyclictest	1860547	-21	kworker/u8:2+events_unbound	22:11:10	1
1902696	99	41	31,7	cyclictest	282	-21	systemd-journal	21:10:28	1
1902696	99	41	20,6	cyclictest	2078394	-21	/usr/sbin/munin	22:06:13	1
1902693	99	41	38,2	cyclictest	2192285	-21	kworker/u8:3+events_unbound	00:04:30	0
1902693	99	41	38,2	cyclictest	1924167	-21	kworker/u8:3+events_unbound	19:42:30	0
1902693	99	41	37,3	cyclictest	2092268	-21	kworker/u8:3+events_unbound	22:31:31	0
1902693	99	41	37,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:51:23	0
1902693	99	41	37,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	21:34:08	0
1902693	99	41	33,6	cyclictest	282	-21	systemd-journal	00:10:01	0
1902693	99	41	33,3	cyclictest	2156942	-21	kworker/u8:1+events_unbound	23:46:53	0
1902693	99	41	33,3	cyclictest	2156942	-21	kworker/u8:1+events_unbound	23:46:53	0
1902696	99	40	29,7	cyclictest	282	-21	systemd-journal	21:56:28	1
1902693	99	40	37,2	cyclictest	2092268	-21	kworker/u8:3+events_unbound	23:28:18	0
1902693	99	40	36,3	cyclictest	1924167	-21	kworker/u8:3+events_unbound	19:48:51	0
1902696	99	39	33,4	cyclictest	1924897	-21	apt-get	19:31:00	1
1902696	99	39	2,15	cyclictest	2132855	-21	chrt	23:01:02	1
1902693	99	39	36,2	cyclictest	1964354	-21	kworker/u8:1+events_unbound	20:18:30	0
1902693	99	39	35,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	23:51:24	0
1902693	99	39	35,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	22:03:28	0
1902693	99	39	35,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	21:47:31	0
1902693	99	39	35,3	cyclictest	1964354	-21	kworker/u8:1+events_unbound	20:52:09	0
1902693	99	39	35,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	23:15:30	0
1902693	99	39	35,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	23:12:30	0
1902693	99	39	35,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	20:34:07	0
1902693	99	39	34,4	cyclictest	1860547	-21	kworker/u8:2+events_unbound	19:33:29	0
1902693	99	39	31,6	cyclictest	2053394	-21	latency_hist	21:40:01	0
1902700	99	38	32,4	cyclictest	2152632	-21	apt-get	23:21:01	2
1902700	99	38	29,7	cyclictest	282	-21	systemd-journal	23:10:28	2
1902696	99	38	31,5	cyclictest	1860547	-21	kworker/u8:2+flush-8:0	22:41:10	1
1902696	99	38	29,7	cyclictest	1989170	-21	/usr/sbin/munin	20:36:11	1
1902696	99	38	29,6	cyclictest	282	-21	systemd-journal	22:35:28	1
1902693	99	38	34,3	cyclictest	2201182	-21	kworker/u8:0+events_unbound	00:10:02	0
1902693	99	38	34,3	cyclictest	2156942	-21	kworker/u8:1+events_unbound	23:55:02	0
1902693	99	38	34,3	cyclictest	2092268	-21	kworker/u8:3+events_unbound	23:05:30	0
1902693	99	38	34,3	cyclictest	1974257	-21	kworker/u8:3+events_unbound	20:59:30	0
1902693	99	37	33,3	cyclictest	2201182	-21	kworker/u8:0+events_unbound	00:29:10	0
1902693	99	37	33,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	22:45:02	0
1902693	99	37	33,3	cyclictest	2092268	-21	kworker/u8:3+events_unbound	22:19:41	0
1902693	99	37	33,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:15:01	0
1902693	99	37	33,3	cyclictest	1974257	-21	kworker/u8:3+events_unbound	20:29:24	0
1902693	99	37	33,3	cyclictest	1924167	-21	kworker/u8:3+events_unbound	19:58:23	0
1902700	99	36	26,8	cyclictest	2192031	-21	/usr/sbin/munin	00:00:01	2
1902696	99	36	26,7	cyclictest	2202316	-21	/usr/sbin/munin	00:11:14	1
1902696	99	36	24,9	cyclictest	282	-21	systemd-journal	21:26:29	1
1902693	99	36	32,3	cyclictest	2117190	-21	kworker/u8:0+events_unbound	23:24:41	0
1902693	99	36	32,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:13:07	0
1902693	99	36	32,3	cyclictest	1964354	-21	kworker/u8:1+events_unbound	20:47:06	0
1902693	99	36	32,3	cyclictest	1887891	-21	kworker/u8:0+events_unbound	19:20:38	0
1902693	99	36	32,3	cyclictest	1860547	-21	kworker/u8:2+events_unbound	21:04:09	0
1902700	99	35	23,8	cyclictest	2197059	-21	turbostat.cron	00:05:01	2
1902696	99	35	29,3	cyclictest	1915742	-21	kthreadcore	19:21:08	1
1902696	99	35	24,8	cyclictest	2002805	-21	ntpq	20:46:13	1
1902696	99	35	19,5	cyclictest	2126706	-21	ntpq	22:51:14	1
1902693	99	35	31,3	cyclictest	2092268	-21	kworker/u8:3+events_unbound	22:27:58	0
1902693	99	35	31,3	cyclictest	2013248	-21	kworker/u8:0+events_unbound	21:58:26	0
1902693	99	35	31,3	cyclictest	1909703	-21	kworker/u8:1+events_unbound	19:29:46	0
1902696	99	34	28,4	cyclictest	2197389	-21	apt-get	00:06:04	1
1902696	99	34	21,9	cyclictest	282	-21	systemd-journal	21:39:59	1
1902693	99	34	30,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	22:11:30	0
1902693	99	34	30,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	21:43:25	0
1902693	99	34	30,3	cyclictest	2023134	-21	kworker/u8:1+events_unbound	21:43:25	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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