OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat Jul 04, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4034402	99	75	71,3	cyclictest	4049844	-21	kworker/u8:3+events_unbound	20:30:01	0
4034412	99	55	51,3	cyclictest	4049844	-21	kworker/u8:3+flush-259:0	19:55:01	2
4034407	99	48	45,2	cyclictest	75	-21	kswapd0	23:43:24	1
4034412	99	44	41,2	cyclictest	75	-21	kswapd0	23:43:23	2
4034412	99	44	41,2	cyclictest	4127676	-21	kworker/u8:2+events_unbound	20:50:22	2
4034402	99	43	36,2	cyclictest	4049844	-21	kworker/u8:3+events_unbound	19:35:13	0
4034402	99	42	39,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:10:23	0
4034402	99	42	38,3	cyclictest	335557	-21	systemd-journal	21:00:21	0
4034402	99	42	38,3	cyclictest	32052	-21	kworker/u8:2+flush-259:0	22:20:22	0
4034402	99	41	38,2	cyclictest	4168610	-21	kworker/u8:1+events_unbound	21:35:15	0
4034402	99	41	38,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:25:21	0
4034402	99	41	38,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:15:22	0
4034407	99	40	36,3	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:30:15	1
4034402	99	40	36,3	cyclictest	75	-21	kswapd0	23:43:23	0
4034402	99	39	36,2	cyclictest	4143116	-21	kworker/u8:1+flush-259:0	21:05:16	0
4034402	99	39	36,2	cyclictest	4127676	-21	kworker/u8:2+flush-259:0	21:15:20	0
4034402	99	39	35,3	cyclictest	6357	-21	kworker/u8:2+events_unbound	21:50:20	0
4034402	99	39	35,3	cyclictest	156365	-21	kworker/u8:1+flush-259:0	00:15:22	0
4034416	99	38	33,3	cyclictest	335557	-21	systemd-journal	21:30:22	3
4034412	99	38	35,2	cyclictest	42380	-21	kworker/u8:3+events_unbound	22:50:01	2
4034407	99	38	34,3	cyclictest	32052	-21	kworker/u8:2+events_unbound	22:20:17	1
4034402	99	38	35,2	cyclictest	4168610	-21	kworker/u8:1+flush-259:0	21:45:18	0
4034402	99	38	35,2	cyclictest	4127676	-21	kworker/u8:2+flush-259:0	20:55:18	0
4034412	99	37	34,2	cyclictest	109973	-21	kworker/u8:4+flush-259:0	00:20:00	2
4034402	99	37	34,2	cyclictest	4049844	-21	kworker/u8:3+flush-259:0	20:05:19	0
4034402	99	37	33,3	cyclictest	1975250	-21	kworker/u8:2+flush-259:0	19:15:00	0
4034416	99	36	30,4	cyclictest	4044661	-21	latency_hist	19:20:00	3
4034412	99	36	33,2	cyclictest	42092	-21	apt-get	22:22:20	2
4034412	99	36	30,4	cyclictest	4075573	-21	latency_hist	19:50:01	2
4034402	99	36	31,3	cyclictest	4168610	-21	kworker/u8:1+events_unbound	21:40:22	0
4034402	99	36	31,3	cyclictest	4168610	-21	kworker/u8:1+events_unbound	21:40:22	0
4034416	99	35	31,3	cyclictest	73314	-21	latency_hist	22:55:02	3
4034412	99	35	31,3	cyclictest	4127676	-21	kworker/u8:2+events_unbound	21:35:01	2
4034402	99	35	31,2	cyclictest	21	1	rcuc/0	23:35:00	0
4034402	99	35	1,32	cyclictest	1	-21	systemd	23:50:00	0
4034412	99	34	29,4	cyclictest	4085016	-21	ntpq	19:55:20	2
4034407	99	34	30,3	cyclictest	99292	-21	kworker/u8:2+flush-259:0	23:30:23	1
4034402	99	34	31,2	cyclictest	68198	-21	kworker/u8:1+flush-259:0	23:00:17	0
4034402	99	34	30,3	cyclictest	109973	-21	kworker/u8:4+flush-259:0	00:30:13	0
4034412	99	33	30,3	cyclictest	4169088	-21	kworker/u8:4+events_unbound	21:30:23	2
4034407	99	33	29,3	cyclictest	335557	-21	systemd-journal	23:50:00	1
4034402	99	33	30,2	cyclictest	130665	-21	kworker/u8:0+events_unbound	00:00:21	0
4034402	99	33	28,4	cyclictest	335557	-21	systemd-journal	00:25:00	0
4034402	99	33	27,4	cyclictest	94322	-21	diskstats	23:15:14	0
4034407	99	32	28,3	cyclictest	4168610	-21	kworker/u8:1+events_unbound	21:50:00	1
4034407	99	32	27,3	cyclictest	4055219	-21	/usr/sbin/munin	19:30:18	1
4034402	99	32	29,2	cyclictest	68198	-21	kworker/u8:1+events_unbound	23:05:18	0
4034402	99	32	29,2	cyclictest	130665	-21	kworker/u8:0+events_unbound	00:05:00	0
4034402	99	32	29,2	cyclictest	109973	-21	kworker/u8:4+flush-259:0	23:35:23	0
4034416	99	31	27,3	cyclictest	4158573	-21	kworker/u8:3+events_unbound	21:20:22	3
4034407	99	31	27,3	cyclictest	837	-21	kworker/u8:0+events_unbound	22:30:14	1
4034402	99	31	28,2	cyclictest	93837	-21	kworker/u8:0+events_unbound	23:25:13	0
4034402	99	31	28,2	cyclictest	837	-21	kworker/u8:0+flush-259:0	22:25:18	0
4034402	99	31	28,2	cyclictest	837	-21	kworker/u8:0+events_unbound	22:10:16	0
4034402	99	31	28,2	cyclictest	4127676	-21	kworker/u8:2+events_unbound	21:10:17	0
4034402	99	31	28,2	cyclictest	4049844	-21	kworker/u8:3+events_unbound	20:00:17	0
4034402	99	31	28,2	cyclictest	1975250	-21	kworker/u8:2+flush-259:0	19:45:21	0
4034407	99	30	27,2	cyclictest	135898	-21	apt-get	23:55:10	1
4034407	99	30	26,3	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:40:27	1
4034402	99	30	27,2	cyclictest	4049844	-21	kworker/u8:3+flush-259:0	19:30:21	0
4034402	99	30	27,2	cyclictest	130666	-21	kworker/u8:2+events_unbound	23:50:18	0
4034402	99	30	27,2	cyclictest	130666	-21	kworker/u8:2+events_unbound	23:50:17	0
4034412	99	29	26,2	cyclictest	837	-21	kworker/u8:0+flush-259:0	22:10:18	2
4034412	99	29	26,2	cyclictest	4127676	-21	kworker/u8:2+flush-259:0	20:55:24	2
4034412	99	29	26,2	cyclictest	4049844	-21	kworker/u8:3+events_unbound	20:00:24	2
4034412	99	29	26,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	21:00:19	2
4034407	99	29	26,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:10:16	1
4034407	99	29	25,3	cyclictest	4168610	-21	kworker/u8:1+events_unbound	22:12:23	1
4034407	99	29	24,3	cyclictest	4133031	-21	/usr/sbin/munin	20:45:22	1
4034402	99	29	26,2	cyclictest	6357	-21	kworker/u8:2+flush-259:0	21:55:25	0
4034402	99	29	26,2	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:40:18	0
4034402	99	29	20,2	cyclictest	109973	-21	kworker/u8:4+events_unbound	00:25:20	0
4034416	99	28	25,2	cyclictest	3996860	-21	kworker/u8:1+flush-259:0	19:25:23	3
4034416	99	28	23,4	cyclictest	335557	-21	systemd-journal	19:44:59	3
4034416	99	28	22,4	cyclictest	62966	-21	latency_hist	22:45:01	3
4034412	99	28	24,3	cyclictest	335557	-21	systemd-journal	20:35:21	2
4034412	99	28	22,4	cyclictest	4112202	-21	diskstats	20:25:14	2
4034407	99	28	25,2	cyclictest	42380	-21	kworker/u8:3+flush-259:0	22:55:19	1
4034407	99	28	25,2	cyclictest	4158573	-21	kworker/u8:3+flush-259:0	21:20:26	1
4034407	99	28	25,2	cyclictest	4044411	-21	kworker/u8:0+events_unbound	20:54:22	1
4034407	99	28	24,3	cyclictest	6357	-21	kworker/u8:2+flush-259:0	21:55:16	1
4034407	99	28	24,3	cyclictest	4049844	-21	kworker/u8:3+flush-259:0	19:35:15	1
4034407	99	28	23,4	cyclictest	4106616	-21	latency_hist	20:20:01	1
4034402	99	28	25,2	cyclictest	837	-21	kworker/u8:0+flush-259:0	22:05:18	0
4034402	99	28	24,3	cyclictest	42380	-21	kworker/u8:3+events_unbound	22:45:10	0
4034416	99	27	23,3	cyclictest	4168610	-21	kworker/u8:1+flush-259:0	21:40:26	3
4034416	99	27	23,3	cyclictest	4168610	-21	kworker/u8:1+flush-259:0	21:40:26	3
4034416	99	27	21,4	cyclictest	4189933	-21	latency_hist	21:40:01	3
4034412	99	27	24,3	cyclictest	4044411	-21	kworker/u8:0+events_unbound	20:18:23	2
4034412	99	27	23,3	cyclictest	42380	-21	kworker/u8:3+flush-259:0	22:40:00	2
4034412	99	27	23,3	cyclictest	16605	-21	kworker/u8:3+events_unbound	22:00:11	2
4034412	99	27	23,3	cyclictest	109973	-21	kworker/u8:4+events_unbound	23:34:22	2
4034407	99	27	24,2	cyclictest	4044411	-21	kworker/u8:0+events_unbound	20:08:21	1
4034407	99	27	24,2	cyclictest	156365	-21	kworker/u8:1+events_unbound	00:25:00	1
4034407	99	27	23,3	cyclictest	4044411	-21	kworker/u8:0+events_unbound	19:40:17	1
4034402	99	27	24,2	cyclictest	4168610	-21	kworker/u8:1+events_unbound	22:20:01	0
4034416	99	26	23,2	cyclictest	130666	-21	kworker/u8:2+events_unbound	00:30:00	3
4034416	99	26	22,3	cyclictest	4044411	-21	kworker/u8:0+flush-259:0	20:20:20	3
4034412	99	26	23,2	cyclictest	6357	-21	kworker/u8:2+events_unbound	21:58:22	2
4034412	99	26	23,2	cyclictest	42380	-21	kworker/u8:3+events_unbound	22:55:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34