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 Mon Aug 10, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
315880	99	55	0,53	cyclictest	1	-21	systemd	22:47:00	0
315884	99	52	44,2	cyclictest	550379	-21	kworker/u8:4+flush-259:0	00:35:00	1
315887	99	51	46,3	cyclictest	482603	-21	kworker/u8:2+events_unbound	21:55:00	2
315884	99	51	48,2	cyclictest	523608	-21	kworker/u8:3+flush-259:0	22:35:00	1
315884	99	49	46,2	cyclictest	378378	-21	kworker/u8:0+events_unbound	20:40:00	1
315884	99	47	44,2	cyclictest	383698	-21	kworker/u8:2+flush-259:0	20:15:00	1
315887	99	43	36,4	cyclictest	383966	-21	latency_hist	20:15:01	2
315884	99	40	37,2	cyclictest	451667	-21	kworker/u8:0+flush-259:0	21:35:23	1
315884	99	40	37,2	cyclictest	337178	-21	kworker/u8:4+events_unbound	20:55:26	1
315884	99	40	36,2	cyclictest	623447	-21	kworker/u8:1+events_unbound	00:35:20	1
315884	99	40	34,2	cyclictest	337178	-21	kworker/u8:4+events_unbound	21:00:24	1
315884	99	39	36,2	cyclictest	523608	-21	kworker/u8:3+events_unbound	22:45:24	1
315884	99	38	34,3	cyclictest	550379	-21	kworker/u8:4+events_unbound	00:05:26	1
315880	99	38	34,3	cyclictest	629143	-21	gpgv	00:10:00	0
315889	99	37	33,3	cyclictest	534917	-21	/usr/sbin/munin	22:40:24	3
315884	99	37	33,3	cyclictest	607728	-21	kworker/u8:0+flush-259:0	23:55:19	1
315884	99	37	33,3	cyclictest	337178	-21	kworker/u8:4+events_unbound	20:30:21	1
315884	99	37	33,2	cyclictest	3926592	-21	kworker/u8:1+events_unbound	19:15:20	1
315889	99	36	30,4	cyclictest	660041	-21	latency_hist	00:40:00	3
315887	99	36	33,2	cyclictest	257334	-21	kworker/u8:2+events_unbound	19:45:18	2
315884	99	36	33,2	cyclictest	634227	-21	kworker/u8:2+events_unbound	00:20:13	1
315884	99	35	32,2	cyclictest	503277	-21	kworker/u8:0+flush-259:0	23:05:21	1
315884	99	35	32,2	cyclictest	503277	-21	kworker/u8:0+events_unbound	22:10:23	1
315884	99	35	31,3	cyclictest	257334	-21	kworker/u8:2+events_unbound	19:35:17	1
315884	99	34	31,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:20:19	1
315884	99	34	31,2	cyclictest	3926592	-21	kworker/u8:1+events_unbound	20:10:01	1
315884	99	34	31,2	cyclictest	378378	-21	kworker/u8:0+flush-259:0	20:25:25	1
315884	99	34	31,2	cyclictest	378378	-21	kworker/u8:0+flush-259:0	20:25:24	1
315884	99	34	30,3	cyclictest	581248	-21	kworker/u8:0+events_unbound	23:25:15	1
315884	99	34	30,3	cyclictest	550172	-21	kworker/u8:1+events_unbound	23:45:15	1
315884	99	34	30,3	cyclictest	451667	-21	kworker/u8:0+events_unbound	21:30:24	1
315884	99	33	29,3	cyclictest	570914	-21	kworker/u8:3+events_unbound	23:35:18	1
315884	99	33	27,4	cyclictest	451636	-21	latency_hist	21:20:00	1
315889	99	32	25,5	cyclictest	415042	-21	latency_hist	20:45:00	3
315887	99	32	28,3	cyclictest	623447	-21	kworker/u8:1+flush-259:0	00:25:19	2
315884	99	32	29,2	cyclictest	430775	-21	kworker/u8:1+events_unbound	21:20:14	1
315884	99	32	29,2	cyclictest	257334	-21	kworker/u8:2+flush-259:0	19:40:23	1
315884	99	32	28,3	cyclictest	523608	-21	kworker/u8:3+flush-259:0	22:40:20	1
315884	99	32	27,2	cyclictest	430775	-21	kworker/u8:1+events_unbound	21:50:24	1
315887	99	31	25,4	cyclictest	363293	-21	latency_hist	19:55:00	2
315884	99	31	28,2	cyclictest	257334	-21	kworker/u8:2+flush-259:0	19:10:22	1
315884	99	31	25,4	cyclictest	446469	-21	latency_hist	21:15:01	1
315880	99	31	0,29	cyclictest	1	-21	systemd	21:19:33	0
315884	99	30	27,2	cyclictest	623447	-21	kworker/u8:1+flush-259:0	00:25:25	1
315884	99	30	27,2	cyclictest	337178	-21	kworker/u8:4+flush-259:0	20:45:19	1
315884	99	30	26,3	cyclictest	430775	-21	kworker/u8:1+flush-259:0	21:25:16	1
315884	99	30	25,3	cyclictest	477708	-21	apt-get	21:45:12	1
315884	99	30	23,3	cyclictest	513636	-21	kworker/u8:1+events_unbound	22:20:14	1
315887	99	29	23,4	cyclictest	335557	-21	systemd-journal	00:38:34	2
315884	99	29	26,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:10:21	1
315884	99	29	26,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	00:00:34	1
315884	99	29	26,2	cyclictest	482603	-21	kworker/u8:2+flush-259:0	22:15:16	1
315884	99	29	26,2	cyclictest	257334	-21	kworker/u8:2+events_unbound	20:04:31	1
315884	99	29	25,3	cyclictest	523608	-21	kworker/u8:3+flush-259:0	22:35:19	1
315884	99	29	25,3	cyclictest	523608	-21	kworker/u8:3+flush-259:0	22:35:19	1
315884	99	29	25,3	cyclictest	3926592	-21	kworker/u8:1+events_unbound	19:20:18	1
315884	99	29	25,3	cyclictest	383698	-21	kworker/u8:2+events_unbound	20:20:20	1
315884	99	29	25,3	cyclictest	257334	-21	kworker/u8:2+events_unbound	19:50:14	1
315884	99	29	22,2	cyclictest	430775	-21	kworker/u8:1+events_unbound	21:55:22	1
315889	99	28	22,4	cyclictest	565706	-21	latency_hist	23:10:01	3
315887	99	28	25,2	cyclictest	430775	-21	kworker/u8:1+flush-259:0	21:10:18	2
315887	99	28	24,3	cyclictest	513636	-21	kworker/u8:1+flush-259:0	22:30:21	2
315887	99	28	21,5	cyclictest	591580	-21	latency_hist	23:35:01	2
315884	99	28	25,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:00:25	1
315884	99	28	25,2	cyclictest	482603	-21	kworker/u8:2+flush-259:0	22:00:26	1
315884	99	28	25,2	cyclictest	441013	-21	kworker/u8:2+events_unbound	21:10:01	1
315884	99	28	24,3	cyclictest	550379	-21	kworker/u8:4+flush-259:0	22:56:34	1
315880	99	28	23,3	cyclictest	335557	-21	systemd-journal	20:34:33	0
315880	99	28	21,5	cyclictest	597003	-21	store	23:40:00	0
315884	99	27	24,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:17:01	1
315884	99	27	19,3	cyclictest	420254	-21	kworker/u8:0+events_unbound	20:50:17	1
315889	99	26	23,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:04:55	3
315889	99	26	22,3	cyclictest	628569	-21	apt-get	00:10:02	3
315889	99	26	20,4	cyclictest	524772	-21	diskstats	22:30:13	3
315887	99	26	23,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:40:23	2
315887	99	26	22,3	cyclictest	430775	-21	kworker/u8:1+flush-259:0	22:05:17	2
315884	99	26	23,2	cyclictest	550379	-21	kworker/u8:4+events_unbound	23:40:22	1
315884	99	26	20,4	cyclictest	523062	-21	ntpq	22:25:23	1
315884	99	26	20,4	cyclictest	523062	-21	ntpq	22:25:22	1
315880	99	26	22,3	cyclictest	513636	-21	kworker/u8:1+flush-259:0	22:30:00	0
315880	99	26	22,3	cyclictest	513636	-21	kworker/u8:1+flush-259:0	22:30:00	0
315889	99	25	23,2	cyclictest	451667	-21	kworker/u8:0+events_unbound	21:49:55	3
315889	99	25	20,3	cyclictest	613092	-21	latency_hist	23:55:01	3
315887	99	25	21,3	cyclictest	523608	-21	kworker/u8:3+flush-259:0	22:40:25	2
315887	99	25	20,4	cyclictest	384201	-21	/usr/sbin/munin	20:15:14	2
315884	99	25	22,2	cyclictest	503277	-21	kworker/u8:0+flush-259:0	22:50:19	1
315884	99	25	22,2	cyclictest	451667	-21	kworker/u8:0+events_unbound	21:40:12	1
315884	99	25	22,2	cyclictest	430775	-21	kworker/u8:1+events_unbound	22:06:34	1
315884	99	25	21,3	cyclictest	410164	-21	apt-get	20:40:13	1
315880	99	25	18,5	cyclictest	639349	-21	latency_hist	00:19:59	0
315887	99	24	20,3	cyclictest	257334	-21	kworker/u8:2+events_unbound	19:10:23	2
315884	99	24	20,3	cyclictest	3926592	-21	kworker/u8:1+flush-259:0	19:30:05	1
315880	99	24	16,6	cyclictest	335557	-21	systemd-journal	22:44:59	0
315889	99	23	17,4	cyclictest	435283	-21	ntpq	21:00:23	3
315887	99	23	20,2	cyclictest	3926592	-21	kworker/u8:1+flush-259:0	19:55:27	2
315887	99	23	19,3	cyclictest	337178	-21	kworker/u8:4+flush-259:0	20:56:02	2
315884	99	23	20,2	cyclictest	3926592	-21	kworker/u8:1+events_unbound	19:55:20	1
315884	99	23	19,3	cyclictest	257334	-21	kworker/u8:2+events_unbound	19:25:15	1
315880	99	23	16,5	cyclictest	373629	-21	latency_hist	20:05:00	0
315889	99	22	1,19	cyclictest	1	-21	systemd	22:19:59	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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