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 Thu Feb 05, 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
604954	99	51	45,4	cyclictest	770705	-21	/usr/sbin/munin	21:50:13	0
604968	99	50	46,3	cyclictest	728888	-21	kworker/u8:0+flush-259:0	22:00:00	3
604968	99	49	46,2	cyclictest	572709	-21	kworker/u8:4+events_unbound	19:15:14	3
604968	99	47	44,2	cyclictest	641436	-21	kworker/u8:0+flush-259:0	20:05:11	3
604968	99	46	42,3	cyclictest	713462	-21	kworker/u8:3+flush-259:0	21:20:21	3
604961	99	46	40,3	cyclictest	728888	-21	kworker/u8:0+events_unbound	21:55:26	1
604968	99	45	42,2	cyclictest	744754	-21	kworker/u8:1+flush-259:0	21:35:14	3
604964	99	45	39,4	cyclictest	604895	-21	latency_hist	19:10:00	2
604968	99	44	40,3	cyclictest	827564	-21	kworker/u8:0+flush-259:0	23:15:20	3
604961	99	43	39,3	cyclictest	848633	-21	kworker/u8:2+flush-259:0	23:20:20	1
604954	99	43	32,9	cyclictest	672617	-21	apt-get	20:15:11	0
604968	99	42	39,2	cyclictest	827564	-21	kworker/u8:0+flush-259:0	23:35:20	3
604968	99	42	39,2	cyclictest	662023	-21	kworker/u8:1+events_unbound	20:10:20	3
604964	99	42	38,3	cyclictest	662023	-21	kworker/u8:1+flush-259:0	20:10:26	2
604964	99	42	36,4	cyclictest	703137	-21	latency_hist	20:45:01	2
604968	99	41	38,2	cyclictest	728888	-21	kworker/u8:0+flush-259:0	21:50:21	3
604968	99	41	37,3	cyclictest	641436	-21	kworker/u8:0+flush-259:0	20:15:26	3
604968	99	40	37,2	cyclictest	1741588	-21	kworker/u8:0+flush-259:0	19:20:24	3
604968	99	40	37,2	cyclictest	1741588	-21	kworker/u8:0+events_unbound	19:10:22	3
604961	99	40	35,4	cyclictest	636302	-21	latency_hist	19:40:00	1
604954	99	40	36,2	cyclictest	817517	-21	apt-get	22:35:12	0
604968	99	38	35,2	cyclictest	641436	-21	kworker/u8:0+events_unbound	19:50:15	3
604964	99	38	32,4	cyclictest	801791	-21	kworker/u8:1+flush-259:0	22:35:01	2
604964	99	38	31,5	cyclictest	728880	-21	latency_hist	21:10:00	2
604961	99	38	35,2	cyclictest	744754	-21	kworker/u8:1+flush-259:0	21:40:20	1
604961	99	37	34,2	cyclictest	667247	-21	kworker/u8:2+events_unbound	20:50:15	1
604968	99	36	33,2	cyclictest	703160	-21	kworker/u8:1+flush-259:0	20:55:20	3
604968	99	36	32,3	cyclictest	801791	-21	kworker/u8:1+events_unbound	22:35:15	3
604961	99	36	33,2	cyclictest	713462	-21	kworker/u8:3+flush-259:0	21:20:16	1
604961	99	36	30,4	cyclictest	827545	-21	latency_hist	22:45:01	1
604968	99	35	32,2	cyclictest	890443	-21	kworker/u8:3+events_unbound	23:45:23	3
604968	99	35	32,2	cyclictest	1741588	-21	kworker/u8:0+flush-259:0	19:25:24	3
604964	99	35	29,4	cyclictest	728888	-21	kworker/u8:0+flush-259:0	22:25:00	2
604961	99	35	32,2	cyclictest	703160	-21	kworker/u8:1+flush-259:0	21:00:16	1
604961	99	35	30,4	cyclictest	901213	-21	apt-get	23:55:11	1
604968	99	34	31,2	cyclictest	921553	-21	kworker/u8:0+events_unbound	00:15:01	3
604968	99	34	31,2	cyclictest	921553	-21	kworker/u8:0+events_unbound	00:15:00	3
604968	99	34	31,2	cyclictest	631090	-21	kworker/u8:1+flush-259:0	19:45:20	3
604964	99	34	28,4	cyclictest	252	-21	systemd-journal	20:02:35	2
604964	99	34	28,4	cyclictest	252	-21	systemd-journal	19:37:35	2
604964	99	34	26,6	cyclictest	739132	-21	latency_hist	21:20:00	2
604964	99	34	26,5	cyclictest	874352	-21	latency_hist	23:30:00	2
604961	99	34	31,2	cyclictest	770200	-21	kworker/u8:2+flush-259:0	22:00:24	1
604961	99	34	30,3	cyclictest	651966	-21	kworker/u8:4+events_unbound	20:00:16	1
604961	99	34	28,4	cyclictest	672358	-21	latency_hist	20:15:01	1
604968	99	33	30,2	cyclictest	728888	-21	kworker/u8:0+flush-259:0	21:25:26	3
604968	99	33	30,2	cyclictest	687723	-21	kworker/u8:3+events_unbound	20:30:20	3
604968	99	33	28,3	cyclictest	744754	-21	kworker/u8:1+events_unbound	21:40:13	3
604964	99	33	27,4	cyclictest	848633	-21	kworker/u8:2+events_unbound	23:20:22	2
604964	99	33	27,4	cyclictest	791041	-21	apt-get	22:10:01	2
604964	99	33	27,4	cyclictest	760147	-21	latency_hist	21:40:00	2
604954	99	33	28,3	cyclictest	801791	-21	kworker/u8:1+flush-259:0	22:25:17	0
604954	99	33	17,5	cyclictest	692003	-21	ntpq	20:30:22	0
604954	99	33	17,4	cyclictest	739314	-21	base64	21:20:00	0
604968	99	32	30,2	cyclictest	827564	-21	kworker/u8:0+events_unbound	22:50:20	3
604968	99	32	29,2	cyclictest	832764	-21	kworker/u8:4+flush-259:0	23:10:24	3
604964	99	32	26,4	cyclictest	252	-21	systemd-journal	23:13:33	2
604964	99	32	26,4	cyclictest	252	-21	systemd-journal	22:45:54	2
604961	99	32	28,3	cyclictest	641436	-21	kworker/u8:0+events_unbound	19:55:15	1
604954	99	32	27,4	cyclictest	879563	-21	gpgv	23:35:00	0
604954	99	32	26,4	cyclictest	790181	-21	ntpq	22:05:21	0
604968	99	31	28,2	cyclictest	801791	-21	kworker/u8:1+events_unbound	22:25:24	3
604968	99	31	28,2	cyclictest	728888	-21	kworker/u8:0+events_unbound	22:05:13	3
604968	99	31	27,3	cyclictest	921553	-21	kworker/u8:0+events_unbound	00:18:55	3
604968	99	31	27,3	cyclictest	921553	-21	kworker/u8:0+events_unbound	00:18:55	3
604968	99	31	27,3	cyclictest	641436	-21	kworker/u8:0+flush-259:0	20:25:24	3
604961	99	31	27,3	cyclictest	713462	-21	kworker/u8:3+events_unbound	21:10:15	1
604954	99	31	25,4	cyclictest	615674	-21	latency_hist	19:20:00	0
604968	99	30	28,2	cyclictest	728888	-21	kworker/u8:0+flush-259:0	22:15:21	3
604968	99	30	27,2	cyclictest	615424	-21	kworker/u8:2+flush-259:0	19:30:22	3
604968	99	30	26,3	cyclictest	890443	-21	kworker/u8:3+events_unbound	23:55:13	3
604968	99	30	26,3	cyclictest	874372	-21	kworker/u8:1+events_unbound	00:30:24	3
604968	99	30	26,3	cyclictest	770200	-21	kworker/u8:2+flush-259:0	22:00:22	3
604968	99	30	25,4	cyclictest	718866	-21	apt-get	21:00:15	3
604964	99	30	25,4	cyclictest	827564	-21	kworker/u8:0+flush-259:0	23:35:15	2
604961	99	30	27,2	cyclictest	827564	-21	kworker/u8:0+flush-259:0	23:40:17	1
604961	99	30	27,2	cyclictest	760168	-21	kworker/u8:3+flush-259:0	22:05:24	1
604968	99	29	26,2	cyclictest	827564	-21	kworker/u8:0+events_unbound	23:25:13	3
604968	99	29	25,3	cyclictest	832764	-21	kworker/u8:4+events_unbound	23:05:21	3
604968	99	29	25,3	cyclictest	801791	-21	kworker/u8:1+events_unbound	22:40:23	3
604964	99	29	24,4	cyclictest	739794	-21	/usr/sbin/munin	21:20:13	2
604964	99	29	24,3	cyclictest	890443	-21	kworker/u8:3+flush-259:0	00:20:00	2
604964	99	29	24,3	cyclictest	890443	-21	kworker/u8:3+flush-259:0	00:20:00	2
604961	99	29	27,2	cyclictest	1741588	-21	kworker/u8:0+events_unbound	19:10:23	1
604961	99	29	26,2	cyclictest	572709	-21	kworker/u8:4+flush-259:0	19:15:15	1
604961	99	29	25,3	cyclictest	641436	-21	kworker/u8:0+flush-259:0	19:50:15	1
604968	99	28	25,2	cyclictest	874372	-21	kworker/u8:1+events_unbound	00:20:22	3
604968	99	28	25,2	cyclictest	827564	-21	kworker/u8:0+events_unbound	22:55:15	3
604968	99	28	25,2	cyclictest	667247	-21	kworker/u8:2+flush-259:0	21:10:24	3
604968	99	28	24,3	cyclictest	687723	-21	kworker/u8:3+events_unbound	20:40:18	3
604968	99	28	23,3	cyclictest	848633	-21	kworker/u8:2+flush-259:0	23:20:15	3
604961	99	28	21,5	cyclictest	852943	-21	ntpq	23:05:21	1
604961	99	27	24,2	cyclictest	687723	-21	kworker/u8:3+flush-259:0	20:40:21	1
604961	99	27	22,4	cyclictest	1741588	-21	kworker/u8:0+events_unbound	19:25:16	1
604961	99	27	21,4	cyclictest	252	-21	systemd-journal	22:23:33	1
604954	99	27	22,4	cyclictest	728888	-21	kworker/u8:0+flush-259:0	22:20:15	0
604954	99	27	22,3	cyclictest	885335	-21	apt-get	23:40:11	0
604968	99	26	23,2	cyclictest	827564	-21	kworker/u8:0+flush-259:0	22:45:20	3
604964	99	26	22,3	cyclictest	821511	-21	ntpq	22:35:21	2
604964	99	26	19,5	cyclictest	947409	-21	latency_hist	00:40:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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