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 Fri May 15, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2775089	99	44	40,3	cyclictest	2921352	-21	kworker/u8:0+flush-259:0	09:49:59	2
2775094	99	43	40,2	cyclictest	2764945	-21	kworker/u8:4+flush-259:0	07:20:00	3
2775094	99	42	36,4	cyclictest	2994234	-21	latency_hist	10:40:01	3
2775089	99	42	40,1	cyclictest	2957845	-21	fwupd	10:03:44	2
2775089	99	41	36,4	cyclictest	2805952	-21	latency_hist	07:40:00	2
2775084	99	40	34,4	cyclictest	2837621	-21	latency_hist	08:10:01	1
2775094	99	39	35,2	cyclictest	2957845	-21	fwupd	10:03:44	3
2775089	99	39	35,3	cyclictest	2921352	-21	kworker/u8:0+flush-259:0	10:40:25	2
2775084	99	39	35,3	cyclictest	252	-21	systemd-journal	10:03:48	1
2775084	99	38	31,5	cyclictest	2847923	-21	latency_hist	08:20:01	1
2775084	99	37	34,2	cyclictest	2800807	-21	kworker/u8:2+events_unbound	07:40:20	1
2775082	99	37	33,3	cyclictest	2926723	-21	kworker/u8:2+flush-259:0	09:35:14	0
2775082	99	37	30,5	cyclictest	3046445	-21	ntpq	11:25:23	0
2775094	99	36	30,4	cyclictest	3047290	-21	latency_hist	11:30:00	3
2775084	99	36	29,5	cyclictest	2972638	-21	ntpq	10:15:21	1
2775094	99	35	30,3	cyclictest	2946953	-21	kworker/u8:4+flush-259:0	10:19:59	3
2775084	99	35	32,2	cyclictest	2999637	-21	kworker/u8:4+flush-259:0	11:35:15	1
2775082	99	35	32,2	cyclictest	2775024	-21	kworker/u8:1+flush-259:0	07:10:17	0
2775082	99	35	30,4	cyclictest	2811735	-21	apt-get	07:45:11	0
2775094	99	34	30,3	cyclictest	2863168	-21	kworker/u8:3+flush-259:0	08:40:01	3
2775089	99	34	29,3	cyclictest	2884848	-21	latency_hist	08:55:00	2
2775084	99	34	29,3	cyclictest	2795882	-21	/usr/sbin/munin	07:30:15	1
2775094	99	33	29,3	cyclictest	2800807	-21	kworker/u8:2+flush-259:0	07:50:25	3
2775094	99	33	28,3	cyclictest	3015385	-21	latency_hist	11:00:01	3
2775082	99	33	28,3	cyclictest	2879278	-21	apt-get	08:50:00	0
2775089	99	32	28,3	cyclictest	2800807	-21	kworker/u8:2+flush-259:0	08:00:22	2
2775084	99	32	28,3	cyclictest	2821774	-21	apt-get	07:54:59	1
2775084	99	32	28,3	cyclictest	2811494	-21	kworker/u8:1+flush-259:0	09:25:22	1
2775084	99	32	27,4	cyclictest	2983894	-21	latency_hist	10:30:00	1
2775082	99	32	29,2	cyclictest	2989047	-21	kworker/u8:2+flush-259:0	11:35:24	0
2775089	99	31	27,3	cyclictest	2921352	-21	kworker/u8:0+events_unbound	09:50:22	2
2775082	99	31	28,2	cyclictest	2811494	-21	kworker/u8:1+flush-259:0	08:10:15	0
2775082	99	31	26,4	cyclictest	3089233	-21	base64	12:10:01	0
2775082	99	31	25,4	cyclictest	2820885	-21	ntpq	07:50:21	0
2775082	99	30	26,3	cyclictest	2764945	-21	kworker/u8:4+flush-259:0	07:15:17	0
2775094	99	29	25,3	cyclictest	2775024	-21	kworker/u8:1+flush-259:0	07:15:00	3
2775094	99	29	23,4	cyclictest	3109668	-21	latency_hist	12:30:00	3
2775084	99	29	27,1	cyclictest	3068212	-21	kworker/u8:0+events_unbound	12:10:24	1
2775084	99	29	26,2	cyclictest	3026399	-21	kworker/u8:3+events_unbound	11:51:44	1
2775084	99	29	25,3	cyclictest	3099381	-21	kworker/u8:2+events_unbound	12:29:44	1
2775084	99	29	23,4	cyclictest	252	-21	systemd-journal	11:05:43	1
2775082	99	29	25,3	cyclictest	3026399	-21	kworker/u8:3+events_unbound	11:30:24	0
2775082	99	29	25,3	cyclictest	2868559	-21	gpgv	08:40:00	0
2775082	99	29	24,4	cyclictest	252	-21	systemd-journal	10:18:50	0
2775084	99	28	25,2	cyclictest	2921352	-21	kworker/u8:0+flush-259:0	10:45:23	1
2775084	99	27	24,2	cyclictest	2894848	-21	kworker/u8:3+events_unbound	09:36:44	1
2775084	99	27	23,3	cyclictest	2811494	-21	kworker/u8:1+events_unbound	08:35:22	1
2775084	99	27	21,4	cyclictest	2911030	-21	gpgv	09:20:01	1
2775082	99	27	25,2	cyclictest	3068212	-21	kworker/u8:0+events_unbound	12:15:25	0
2775082	99	27	24,2	cyclictest	3068212	-21	kworker/u8:0+flush-259:0	12:00:15	0
2775082	99	27	23,3	cyclictest	2989047	-21	kworker/u8:2+events_unbound	10:50:20	0
2775082	99	27	22,4	cyclictest	2869046	-21	cat	08:40:01	0
2775082	99	27	22,4	cyclictest	2853491	-21	diskstats	08:25:15	0
2775094	99	26	23,2	cyclictest	2853087	-21	kworker/u8:0+flush-259:0	08:50:21	3
2775094	99	26	20,4	cyclictest	3004588	-21	latency_hist	10:50:00	3
2775094	99	26	20,4	cyclictest	2894238	-21	ntpq	09:00:22	3
2775089	99	26	23,2	cyclictest	2926723	-21	kworker/u8:2+events_unbound	09:35:22	2
2775089	99	26	22,3	cyclictest	2942026	-21	kworker/u8:3+events_unbound	09:55:22	2
2775084	99	26	22,3	cyclictest	2811494	-21	kworker/u8:1+events_unbound	09:33:43	1
2775084	99	26	22,3	cyclictest	2811494	-21	kworker/u8:1+events_unbound	08:13:35	1
2775084	99	26	21,3	cyclictest	252	-21	systemd-journal	10:52:43	1
2775082	99	26	23,2	cyclictest	2785570	-21	kworker/u8:0+events_unbound	07:25:23	0
2775094	99	25	19,4	cyclictest	2936792	-21	latency_hist	09:45:01	3
2775084	99	25	22,2	cyclictest	3099381	-21	kworker/u8:2+events_unbound	12:30:15	1
2775084	99	25	21,3	cyclictest	2942026	-21	kworker/u8:3+flush-259:0	09:55:15	1
2775084	99	25	21,3	cyclictest	2853087	-21	kworker/u8:0+flush-259:0	08:55:20	1
2775084	99	25	19,4	cyclictest	3077514	-21	ntpq	11:55:22	1
2775084	99	25	19,4	cyclictest	2915320	-21	ntpq	09:20:22	1
2775082	99	25	21,3	cyclictest	2800807	-21	kworker/u8:2+events_unbound	08:15:25	0
2775082	99	25	21,3	cyclictest	2800807	-21	kworker/u8:2+events_unbound	08:15:24	0
2775094	99	24	21,2	cyclictest	2946953	-21	kworker/u8:4+events_unbound	10:10:24	3
2775094	99	24	20,3	cyclictest	2811494	-21	kworker/u8:1+flush-259:0	08:30:16	3
2775094	99	24	18,4	cyclictest	3062798	-21	latency_hist	11:45:00	3
2775089	99	24	20,3	cyclictest	3088746	-21	gpgv	12:09:59	2
2775084	99	24	20,3	cyclictest	2942026	-21	kworker/u8:3+flush-259:0	10:10:14	1
2775084	99	24	20,3	cyclictest	2811494	-21	kworker/u8:1+flush-259:0	07:58:44	1
2775084	99	24	19,3	cyclictest	252	-21	systemd-journal	10:20:44	1
2775082	99	24	21,2	cyclictest	2921352	-21	kworker/u8:0+events_unbound	09:40:20	0
2775082	99	24	21,2	cyclictest	2811494	-21	kworker/u8:1+events_unbound	09:25:14	0
2775082	99	24	21,2	cyclictest	2800807	-21	kworker/u8:2+flush-259:0	08:20:24	0
2775082	99	24	20,3	cyclictest	2800807	-21	kworker/u8:2+flush-259:0	07:40:19	0
2775082	99	24	18,4	cyclictest	2999670	-21	apt-get	10:45:12	0
2775089	99	23	19,3	cyclictest	2800807	-21	kworker/u8:2+events_unbound	08:25:23	2
2775084	99	23	20,2	cyclictest	3068212	-21	kworker/u8:0+flush-259:0	12:05:19	1
2775084	99	23	20,2	cyclictest	3026399	-21	kworker/u8:3+events_unbound	11:15:22	1
2775084	99	23	20,2	cyclictest	2971	-21	cron	10:40:00	1
2775084	99	23	19,3	cyclictest	2989047	-21	kworker/u8:2+events_unbound	11:43:44	1
2775084	99	23	19,3	cyclictest	2894848	-21	kworker/u8:3+flush-259:0	09:05:17	1
2775084	99	23	19,3	cyclictest	2811494	-21	kworker/u8:1+events_unbound	08:50:43	1
2775082	99	23	20,2	cyclictest	2989047	-21	kworker/u8:2+events_unbound	11:10:22	0
2775082	99	23	20,2	cyclictest	2921352	-21	kworker/u8:0+events_unbound	11:05:19	0
2775082	99	23	20,2	cyclictest	2800807	-21	kworker/u8:2+events_unbound	08:05:18	0
2775082	99	23	19,3	cyclictest	500	-21	systemd-logind	12:10:00	0
2775082	99	23	19,3	cyclictest	2999637	-21	kworker/u8:4+events_unbound	11:45:22	0
2775082	99	23	19,3	cyclictest	2942026	-21	kworker/u8:3+events_unbound	09:55:13	0
2775082	99	23	19,3	cyclictest	2921591	-21	apt-get	09:30:10	0
2775094	99	22	18,3	cyclictest	3026399	-21	kworker/u8:3+flush-259:0	11:15:17	3
2775089	99	22	20,2	cyclictest	3099381	-21	kworker/u8:2+events_unbound	12:25:22	2
2775089	99	22	19,2	cyclictest	3026399	-21	kworker/u8:3+events_unbound	11:30:15	2
2775089	99	22	19,2	cyclictest	2800807	-21	kworker/u8:2+flush-259:0	07:50:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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