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 Sat Aug 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
2339040	99	61	58,2	cyclictest	2463491	-21	kworker/u8:2+events_unbound	21:10:02	2
2339037	99	48	45,2	cyclictest	2380571	-21	kworker/u8:4+events_unbound	20:00:02	1
2339040	99	44	38,4	cyclictest	2588253	-21	latency_hist	23:10:01	2
2339037	99	44	36,5	cyclictest	2624811	-21	latency_hist	23:45:01	1
2339044	99	42	38,3	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	22:15:01	3
2339037	99	38	35,2	cyclictest	2536630	-21	kworker/u8:2+events_unbound	22:22:00	1
2339044	99	37	33,3	cyclictest	2469380	-21	kworker/u8:3+flush-259:0	21:30:00	3
2339037	99	37	30,5	cyclictest	335557	-21	systemd-journal	19:45:00	1
2339044	99	36	31,3	cyclictest	2583102	-21	latency_hist	23:05:00	3
2339037	99	36	33,2	cyclictest	2515939	-21	kworker/u8:0+events_unbound	22:37:05	1
2339037	99	36	30,4	cyclictest	509	-21	rs:main		1
2339037	99	36	29,5	cyclictest	335557	-21	systemd-journal	23:02:32	1
2339040	99	35	31,3	cyclictest	2339225	-21	kworker/u8:3+flush-259:0	19:10:25	2
2339034	99	35	29,4	cyclictest	2458315	-21	gpgv	21:05:01	0
2339044	99	33	27,4	cyclictest	2573039	-21	/usr/sbin/munin	22:55:13	3
2339040	99	33	26,5	cyclictest	2416686	-21	base64	20:25:00	2
2339034	99	33	30,2	cyclictest	21	1	rcuc/0	22:15:00	0
2339040	99	32	29,2	cyclictest	335557	-21	systemd-journal	21:47:31	2
2339040	99	32	25,5	cyclictest	2561596	-21	ntpq	22:40:20	2
2339040	99	32	24,6	cyclictest	2656251	-21	latency_hist	00:15:01	2
2339040	99	32	24,6	cyclictest	2656251	-21	latency_hist	00:15:01	2
2339034	99	32	25,5	cyclictest	2666190	-21	ntpq	00:20:22	0
2339044	99	31	28,2	cyclictest	2463491	-21	kworker/u8:2+flush-259:0	21:20:23	3
2339040	99	31	26,3	cyclictest	2463785	-21	gpgv	21:09:59	2
2339040	99	31	25,4	cyclictest	2359723	-21	kworker/u8:1+events_unbound	19:35:24	2
2339034	99	31	26,3	cyclictest	2630470	-21	base64	23:50:01	0
2339044	99	30	27,2	cyclictest	2661423	-21	kworker/u8:1+events_unbound	00:30:01	3
2339044	99	30	26,3	cyclictest	2505563	-21	kworker/u8:2+flush-259:0	21:50:24	3
2339040	99	30	27,2	cyclictest	2588276	-21	kworker/u8:2+flush-259:0	23:15:13	2
2339040	99	30	25,3	cyclictest	2552100	-21	latency_hist	22:35:00	2
2339044	99	29	26,2	cyclictest	2536630	-21	kworker/u8:2+flush-259:0	22:55:01	3
2339044	99	29	25,3	cyclictest	2485534	-21	kworker/u8:1+flush-259:0	21:45:00	3
2339044	99	29	25,3	cyclictest	2318105	-21	kworker/u8:0+flush-259:0	19:30:00	3
2339040	99	29	25,3	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	00:38:44	2
2339034	99	29	25,2	cyclictest	2588276	-21	kworker/u8:2+flush-259:0	23:35:15	0
2339034	99	29	23,4	cyclictest	2609367	-21	turbostat	23:30:00	0
2339044	99	28	24,3	cyclictest	2380364	-21	kworker/u8:3+flush-259:0	20:00:00	3
2339040	99	28	24,3	cyclictest	2515939	-21	kworker/u8:0+events_unbound	23:55:12	2
2339040	99	28	23,3	cyclictest	2380364	-21	kworker/u8:3+events_unbound	20:10:01	2
2339037	99	28	25,2	cyclictest	2645928	-21	kworker/u8:3+events_unbound	00:14:56	1
2339037	99	28	25,2	cyclictest	2645928	-21	kworker/u8:3+events_unbound	00:14:55	1
2339037	99	28	22,4	cyclictest	335557	-21	systemd-journal	21:00:31	1
2339037	99	28	21,5	cyclictest	2593429	-21	latency_hist	23:15:01	1
2339034	99	28	24,3	cyclictest	2505768	-21	kworker/u8:4+flush-259:0	22:20:01	0
2339040	99	27	21,4	cyclictest	2500385	-21	latency_hist	21:45:01	2
2339040	99	27	20,5	cyclictest	2432401	-21	awk	20:40:00	2
2339037	99	27	22,4	cyclictest	2474782	-21	apt-get	21:20:11	1
2339037	99	27	21,4	cyclictest	2661925	-21	cat	00:20:01	1
2339044	99	26	22,3	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	21:14:59	3
2339044	99	26	21,4	cyclictest	2485534	-21	kworker/u8:1+flush-259:0	21:34:37	3
2339040	99	26	22,3	cyclictest	2515939	-21	kworker/u8:0+events_unbound	23:46:32	2
2339040	99	26	22,3	cyclictest	2505768	-21	kworker/u8:4+events_unbound	21:55:13	2
2339040	99	26	20,3	cyclictest	2640951	-21	/usr/sbin/munin	00:00:16	2
2339040	99	26	19,5	cyclictest	2651061	-21	latency_hist	00:10:00	2
2339034	99	26	20,4	cyclictest	2394905	-21	ntpq	20:00:18	0
2339040	99	25	21,3	cyclictest	2515939	-21	kworker/u8:0+events_unbound	00:24:06	2
2339040	99	25	20,4	cyclictest	2588276	-21	kworker/u8:2+events_unbound	23:35:32	2
2339040	99	25	19,4	cyclictest	2339225	-21	kworker/u8:3+events_unbound	19:26:34	2
2339037	99	25	20,4	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	20:20:18	1
2339037	99	25	20,3	cyclictest	2614783	-21	apt-get	23:35:11	1
2339037	99	25	20,3	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	22:10:01	1
2339044	99	24	21,2	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	19:30:24	3
2339040	99	24	21,2	cyclictest	2661423	-21	kworker/u8:1+flush-259:0	00:30:27	2
2339040	99	24	20,3	cyclictest	2505768	-21	kworker/u8:4+events_unbound	22:15:34	2
2339040	99	24	20,3	cyclictest	2285506	-21	kworker/u8:1+flush-259:0	19:15:25	2
2339037	99	24	21,2	cyclictest	2359723	-21	kworker/u8:1+events_unbound	19:50:01	1
2339037	99	24	17,5	cyclictest	335557	-21	systemd-journal	19:22:31	1
2339034	99	24	21,2	cyclictest	2515939	-21	kworker/u8:0+events_unbound	22:55:16	0
2339034	99	24	20,3	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	20:35:33	0
2339034	99	24	19,4	cyclictest	2509806	-21	ntpq	21:50:21	0
2339044	99	23	18,3	cyclictest	2458424	-21	store	21:05:02	3
2339044	99	23	17,4	cyclictest	335557	-21	systemd-journal	19:40:01	3
2339040	99	23	19,3	cyclictest	2525874	-21	kworker/u8:1+flush-259:0	22:20:21	2
2339040	99	23	17,4	cyclictest	2410495	-21	ntpq	20:15:24	2
2339037	99	23	16,5	cyclictest	2359710	-21	latency_hist	19:30:00	1
2339034	99	23	19,3	cyclictest	2677601	-21	gpgv	00:35:01	0
2339034	99	23	19,3	cyclictest	2645928	-21	kworker/u8:3+flush-259:0	00:15:00	0
2339034	99	23	19,3	cyclictest	2645928	-21	kworker/u8:3+flush-259:0	00:14:59	0
2339034	99	23	19,3	cyclictest	2395853	-21	kworker/u8:2+flush-259:0	20:30:28	0
2339044	99	22	19,2	cyclictest	2593457	-21	gpgv	23:15:00	3
2339044	99	22	18,3	cyclictest	2536630	-21	kworker/u8:2+flush-259:0	22:35:00	3
2339040	99	22	18,3	cyclictest	2395853	-21	kworker/u8:2+events_unbound	20:33:32	2
2339040	99	22	18,3	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	20:55:25	2
2339040	99	22	18,3	cyclictest	2318105	-21	kworker/u8:0+events_unbound	19:10:00	2
2339040	99	22	18,2	cyclictest	2521357	-21	apt-get	22:05:12	2
2339040	99	22	17,4	cyclictest	2422101	-21	kworker/u8:3+events_unbound	20:46:49	2
2339040	99	22	17,3	cyclictest	2578169	-21	/usr/sbin/munin	23:00:14	2
2339037	99	22	17,3	cyclictest	2463491	-21	kworker/u8:2+flush-259:0	21:20:00	1
2339034	99	22	19,2	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	23:20:23	0
2339034	99	22	19,2	cyclictest	2359723	-21	kworker/u8:1+flush-259:0	20:45:24	0
2339044	99	21	18,2	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	22:00:16	3
2339044	99	21	16,4	cyclictest	2604187	-21	latency_hist	23:25:01	3
2339040	99	21	18,2	cyclictest	2339029	-21	cyclictest	21:05:01	2
2339040	99	21	17,3	cyclictest	2536630	-21	kworker/u8:2+flush-259:0	22:36:37	2
2339040	99	21	17,3	cyclictest	2525874	-21	kworker/u8:1+flush-259:0	22:13:08	2
2339040	99	21	16,4	cyclictest	2505768	-21	kworker/u8:4+flush-259:0	21:55:00	2
2339040	99	21	16,3	cyclictest	2599250	-21	/usr/sbin/munin	23:20:20	2
2339037	99	21	18,2	cyclictest	2485534	-21	kworker/u8:1+events_unbound	21:36:40	1
2339044	99	20	17,2	cyclictest	2515939	-21	kworker/u8:0+flush-259:0	23:55:15	3
2339044	99	20	15,4	cyclictest	2608496	-21	ntpq	23:25:19	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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