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
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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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Mon Jun 08, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
474213	99	51	47,3	cyclictest	634947	-21	kworker/u8:0+events_unbound	22:25:01	0
474218	99	45	42,2	cyclictest	436726	-21	kworker/u8:3+events_unbound	19:10:20	2
474213	99	44	37,5	cyclictest	593637	-21	latency_hist	21:05:01	0
474215	99	42	34,6	cyclictest	335557	-21	systemd-journal	22:25:00	1
474218	99	40	37,2	cyclictest	766721	-21	kworker/u8:2+events_unbound	00:35:15	2
474218	99	40	36,2	cyclictest	510417	-21	kworker/u8:3+flush-259:0	19:50:20	2
474218	99	40	36,2	cyclictest	510417	-21	kworker/u8:3+flush-259:0	19:50:20	2
474213	99	40	34,4	cyclictest	557600	-21	latency_hist	20:30:01	0
474218	99	39	34,3	cyclictest	672078	-21	kworker/u8:4+events_unbound	22:35:23	2
474213	99	39	36,2	cyclictest	557620	-21	kworker/u8:3+flush-259:0	21:15:21	0
474213	99	39	32,3	cyclictest	557620	-21	kworker/u8:3+events_unbound	21:15:02	0
474215	99	38	32,4	cyclictest	562978	-21	/usr/sbin/munin	20:35:15	1
474213	99	38	35,2	cyclictest	719072	-21	kworker/u8:3+flush-259:0	23:45:15	0
474213	99	38	35,2	cyclictest	672078	-21	kworker/u8:4+flush-259:0	23:10:21	0
474213	99	38	34,2	cyclictest	708117	-21	kworker/u8:1+events_unbound	23:15:15	0
474218	99	37	34,2	cyclictest	650799	-21	kworker/u8:3+flush-259:0	22:15:16	2
474218	99	37	34,2	cyclictest	619650	-21	kworker/u8:4+flush-259:0	21:40:15	2
474215	99	37	32,3	cyclictest	568116	-21	apt-get	20:40:12	1
474218	99	36	33,2	cyclictest	510417	-21	kworker/u8:3+flush-259:0	19:55:25	2
474215	99	36	32,3	cyclictest	671729	-21	kworker/u8:2+flush-259:0	22:30:16	1
474213	99	36	30,4	cyclictest	809033	-21	latency_hist	00:30:00	0
474218	99	35	32,2	cyclictest	557620	-21	kworker/u8:3+events_unbound	20:55:21	2
474213	99	35	30,4	cyclictest	478446	-21	ntpq	19:10:21	0
474218	99	34	31,2	cyclictest	542131	-21	kworker/u8:2+events_unbound	20:35:23	2
474218	99	34	31,2	cyclictest	536904	-21	kworker/u8:0+events_unbound	20:10:16	2
474218	99	34	30,3	cyclictest	557620	-21	kworker/u8:3+events_unbound	21:10:21	2
474213	99	34	31,2	cyclictest	536904	-21	kworker/u8:0+events_unbound	20:20:17	0
474213	99	34	31,2	cyclictest	431555	-21	kworker/u8:2+events_unbound	19:15:22	0
474213	99	34	30,3	cyclictest	719072	-21	kworker/u8:3+events_unbound	00:00:24	0
474218	99	33	30,2	cyclictest	708117	-21	kworker/u8:1+flush-259:0	23:15:17	2
474218	99	33	30,2	cyclictest	672078	-21	kworker/u8:4+flush-259:0	22:40:26	2
474218	99	33	30,2	cyclictest	479355	-21	kworker/u8:1+flush-259:0	20:05:24	2
474215	99	33	27,4	cyclictest	630433	-21	/usr/sbin/munin	21:40:21	1
474213	99	33	30,2	cyclictest	672078	-21	kworker/u8:4+flush-259:0	22:35:22	0
474213	99	33	29,3	cyclictest	526483	-21	apt-get	20:00:12	0
474218	99	32	29,2	cyclictest	793280	-21	kworker/u8:0+events_unbound	00:30:21	2
474218	99	32	29,2	cyclictest	609162	-21	kworker/u8:1+events_unbound	21:25:14	2
474215	99	32	26,5	cyclictest	776231	-21	ntpq	23:55:21	1
474215	99	32	26,4	cyclictest	335557	-21	systemd-journal	00:20:47	1
474213	99	32	29,2	cyclictest	494849	-21	kworker/u8:3+events_unbound	19:30:17	0
474218	99	31	28,2	cyclictest	557620	-21	kworker/u8:3+flush-259:0	21:15:26	2
474218	99	31	27,3	cyclictest	634947	-21	kworker/u8:0+events_unbound	22:25:23	2
474215	99	31	27,3	cyclictest	542131	-21	kworker/u8:2+flush-259:0	20:30:16	1
474213	99	31	28,2	cyclictest	729684	-21	kworker/u8:0+events_unbound	23:25:23	0
474213	99	31	28,2	cyclictest	702939	-21	kworker/u8:0+flush-259:0	22:50:25	0
474223	99	30	22,6	cyclictest	335557	-21	systemd-journal	19:40:00	3
474218	99	30	27,2	cyclictest	766721	-21	kworker/u8:2+events_unbound	00:15:23	2
474218	99	30	27,2	cyclictest	672078	-21	kworker/u8:4+events_unbound	22:55:19	2
474218	99	30	27,2	cyclictest	634947	-21	kworker/u8:0+flush-259:0	22:10:25	2
474218	99	30	27,2	cyclictest	634947	-21	kworker/u8:0+flush-259:0	22:05:20	2
474218	99	30	27,2	cyclictest	619436	-21	kworker/u8:2+events_unbound	21:50:22	2
474218	99	30	25,4	cyclictest	793045	-21	latency_hist	00:15:00	2
474215	99	30	25,3	cyclictest	692774	-21	/usr/sbin/munin	22:40:16	1
474215	99	30	24,4	cyclictest	681285	-21	ntpq	22:25:22	1
474215	99	30	23,5	cyclictest	335557	-21	systemd-journal	22:00:37	1
474213	99	30	27,2	cyclictest	542131	-21	kworker/u8:2+flush-259:0	20:30:20	0
474213	99	30	26,3	cyclictest	766721	-21	kworker/u8:2+events_unbound	00:35:23	0
474213	99	30	26,3	cyclictest	634947	-21	kworker/u8:0+flush-259:0	22:10:25	0
474213	99	30	26,2	cyclictest	557620	-21	kworker/u8:3+events_unbound	20:55:17	0
474223	99	29	22,5	cyclictest	718420	-21	latency_hist	23:05:00	3
474218	99	29	25,3	cyclictest	431555	-21	kworker/u8:2+flush-259:0	19:35:21	2
474215	99	29	25,3	cyclictest	640737	-21	apt-get	21:50:11	1
474213	99	29	26,2	cyclictest	729684	-21	kworker/u8:0+events_unbound	23:30:16	0
474213	99	29	26,2	cyclictest	719072	-21	kworker/u8:3+events_unbound	23:05:22	0
474213	99	29	26,2	cyclictest	719072	-21	kworker/u8:3+events_unbound	00:15:17	0
474213	99	29	26,2	cyclictest	619650	-21	kworker/u8:4+events_unbound	21:30:18	0
474218	99	28	25,2	cyclictest	573243	-21	kworker/u8:1+events_unbound	20:45:21	2
474218	99	28	25,2	cyclictest	567874	-21	kworker/u8:0+events_unbound	20:40:24	2
474218	99	28	24,3	cyclictest	729684	-21	kworker/u8:0+events_unbound	23:30:20	2
474218	99	28	23,4	cyclictest	484492	-21	latency_hist	19:20:00	2
474215	99	28	25,2	cyclictest	619650	-21	kworker/u8:4+flush-259:0	21:30:17	1
474215	99	28	21,5	cyclictest	745227	-21	latency_hist	23:30:00	1
474213	99	28	25,2	cyclictest	479355	-21	kworker/u8:1+flush-259:0	20:05:15	0
474213	99	28	24,2	cyclictest	619436	-21	kworker/u8:2+flush-259:0	21:55:26	0
474223	99	27	23,3	cyclictest	650799	-21	kworker/u8:3+flush-259:0	22:15:22	3
474223	99	27	21,4	cyclictest	335557	-21	systemd-journal	00:20:01	3
474218	99	27	24,2	cyclictest	729684	-21	kworker/u8:0+flush-259:0	23:45:24	2
474218	99	27	24,2	cyclictest	729684	-21	kworker/u8:0+flush-259:0	23:25:14	2
474218	99	27	23,3	cyclictest	729684	-21	kworker/u8:0+events_unbound	23:35:20	2
474218	99	27	23,3	cyclictest	526647	-21	kworker/u8:5+events_unbound	20:00:19	2
474218	99	27	22,4	cyclictest	629279	-21	ntpq	21:35:21	2
474213	99	27	24,2	cyclictest	719072	-21	kworker/u8:3+events_unbound	23:50:14	0
474213	99	27	24,2	cyclictest	672078	-21	kworker/u8:4+flush-259:0	23:00:22	0
474213	99	27	24,2	cyclictest	573243	-21	kworker/u8:1+flush-259:0	20:45:23	0
474223	99	26	19,4	cyclictest	724233	-21	cp	23:10:01	3
474218	99	26	24,2	cyclictest	536904	-21	kworker/u8:0+flush-259:0	20:20:25	2
474218	99	26	23,2	cyclictest	526647	-21	kworker/u8:5+events_unbound	20:15:14	2
474218	99	26	23,2	cyclictest	489332	-21	kworker/u8:0+events_unbound	19:25:23	2
474215	99	26	22,3	cyclictest	557620	-21	kworker/u8:3+events_unbound	21:00:17	1
474215	99	26	20,4	cyclictest	510417	-21	kworker/u8:3+events_unbound	19:50:15	1
474215	99	26	20,4	cyclictest	510417	-21	kworker/u8:3+events_unbound	19:50:15	1
474213	99	26	23,2	cyclictest	489332	-21	kworker/u8:0+events_unbound	19:40:22	0
474213	99	26	22,3	cyclictest	671729	-21	kworker/u8:2+events_unbound	22:25:02	0
474213	99	26	19,5	cyclictest	686498	-21	ntpq	22:30:21	0
474223	99	25	21,3	cyclictest	630458	-21	apt-get	21:40:12	3
474223	99	25	17,5	cyclictest	677008	-21	latency_hist	22:25:00	3
474218	99	25	22,2	cyclictest	766721	-21	kworker/u8:2+events_unbound	23:50:23	2
474218	99	25	22,2	cyclictest	672078	-21	kworker/u8:4+events_unbound	23:13:40	2
474218	99	25	22,2	cyclictest	634947	-21	kworker/u8:0+events_unbound	22:00:19	2
474218	99	25	22,2	cyclictest	583315	-21	kworker/u8:2+events_unbound	21:05:16	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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