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 Jun 05, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2910652	99	51	45,4	cyclictest	3061484	-21	latency_hist	09:35:00	3
2910652	99	47	41,4	cyclictest	3124054	-21	ntpq	10:30:21	3
2910644	99	46	41,3	cyclictest	3087359	-21	latency_hist	10:00:00	1
2910647	99	44	40,3	cyclictest	3066848	-21	kworker/u8:4+flush-259:0	10:05:18	2
2910652	99	42	35,5	cyclictest	3171811	-21	apt-get	11:20:01	3
2910647	99	42	35,4	cyclictest	3156356	-21	latency_hist	11:05:01	2
2910647	99	41	38,2	cyclictest	2856792	-21	kworker/u8:1+events_unbound	07:20:01	2
2910647	99	39	36,2	cyclictest	3161747	-21	kworker/u8:2+events_unbound	11:15:24	2
2910644	99	38	32,4	cyclictest	3197258	-21	ntpq	11:40:20	1
2910652	99	37	34,2	cyclictest	3035316	-21	kworker/u8:2+flush-259:0	09:10:14	3
2910652	99	37	34,2	cyclictest	2931755	-21	kworker/u8:3+flush-259:0	08:05:16	3
2910652	99	37	34,2	cyclictest	2931755	-21	kworker/u8:3+flush-259:0	08:05:16	3
2910647	99	36	33,2	cyclictest	3029990	-21	kworker/u8:3+flush-259:0	10:40:21	2
2910647	99	36	33,2	cyclictest	2931755	-21	kworker/u8:3+flush-259:0	07:40:15	2
2910652	99	35	30,3	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	11:40:15	3
2910647	99	35	32,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	09:15:26	2
2910647	99	35	31,3	cyclictest	3229199	-21	kworker/u8:3+flush-259:0	12:20:20	2
2910647	99	35	31,3	cyclictest	3029990	-21	kworker/u8:3+flush-259:0	09:55:20	2
2910647	99	35	31,3	cyclictest	2947198	-21	kworker/u8:4+events_unbound	08:30:17	2
2910647	99	35	29,4	cyclictest	2983130	-21	latency_hist	08:20:00	2
2910640	99	35	28,5	cyclictest	335557	-21	systemd-journal	11:22:27	0
2910640	99	35	28,5	cyclictest	3055358	-21	ntpq	09:25:22	0
2910652	99	34	29,3	cyclictest	3254381	-21	kworker/u8:1+events_unbound	12:40:01	3
2910652	99	34	29,3	cyclictest	3254381	-21	kworker/u8:1+events_unbound	12:40:00	3
2910647	99	34	31,2	cyclictest	2856792	-21	kworker/u8:1+flush-259:0	07:10:21	2
2910652	99	33	27,4	cyclictest	3239697	-21	diskstats	12:25:13	3
2910652	99	33	27,4	cyclictest	2957784	-21	diskstats	07:55:13	3
2910652	99	33	26,5	cyclictest	3248633	-21	ntpq	12:30:19	3
2910647	99	33	30,2	cyclictest	2972828	-21	kworker/u8:1+events_unbound	09:00:14	2
2910647	99	33	29,3	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	11:10:21	2
2910647	99	33	29,3	cyclictest	3161747	-21	kworker/u8:2+events_unbound	11:40:12	2
2910647	99	33	29,3	cyclictest	2856792	-21	kworker/u8:1+flush-259:0	07:25:14	2
2910644	99	33	28,4	cyclictest	3098234	-21	cp	10:09:59	1
2910644	99	33	28,3	cyclictest	3076977	-21	latency_hist	09:50:00	1
2910640	99	33	29,3	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	11:45:01	0
2910640	99	33	28,3	cyclictest	3019928	-21	apt-get	08:55:10	0
2910640	99	33	26,5	cyclictest	335557	-21	systemd-journal	08:20:00	0
2910647	99	32	29,2	cyclictest	3082383	-21	kworker/u8:2+events_unbound	10:30:01	2
2910647	99	32	29,2	cyclictest	2926008	-21	kworker/u8:2+flush-259:0	07:45:26	2
2910647	99	32	28,3	cyclictest	3208425	-21	kworker/u8:1+events_unbound	12:10:16	2
2910647	99	31	28,2	cyclictest	3161747	-21	kworker/u8:2+events_unbound	12:35:20	2
2910647	99	31	28,2	cyclictest	3161747	-21	kworker/u8:2+events_unbound	12:35:20	2
2910647	99	31	27,3	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	12:15:20	2
2910647	99	31	27,3	cyclictest	3082383	-21	kworker/u8:2+events_unbound	10:20:15	2
2910647	99	31	27,3	cyclictest	2972828	-21	kworker/u8:1+events_unbound	08:25:17	2
2910644	99	31	25,4	cyclictest	2930657	-21	ntpq	07:25:22	1
2910652	99	30	26,3	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	09:25:16	3
2910647	99	30	27,2	cyclictest	3172469	-21	kworker/u8:0+events_unbound	11:25:17	2
2910647	99	30	27,2	cyclictest	3098784	-21	kworker/u8:1+events_unbound	10:15:12	2
2910647	99	30	27,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	09:25:19	2
2910647	99	30	27,2	cyclictest	2931755	-21	kworker/u8:3+events_unbound	08:10:20	2
2910647	99	30	26,3	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	08:50:21	2
2910640	99	30	25,4	cyclictest	3029990	-21	kworker/u8:3+flush-259:0	10:10:14	0
2910647	99	29	26,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	08:20:21	2
2910647	99	29	25,3	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	12:30:20	2
2910647	99	29	25,3	cyclictest	2947198	-21	kworker/u8:4+events_unbound	08:45:16	2
2910647	99	29	23,3	cyclictest	3140429	-21	latency_hist	10:50:01	2
2910644	99	29	26,2	cyclictest	3229199	-21	kworker/u8:3+flush-259:0	12:40:00	1
2910644	99	29	26,2	cyclictest	3229199	-21	kworker/u8:3+flush-259:0	12:40:00	1
2910644	99	29	25,3	cyclictest	3953151	-21	kworker/u8:0+flush-259:0	07:30:16	1
2910644	99	29	23,5	cyclictest	3061725	-21	/usr/sbin/munin	09:35:14	1
2910640	99	29	24,3	cyclictest	3066848	-21	kworker/u8:4+flush-259:0	10:00:16	0
2910640	99	29	24,3	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	08:35:27	0
2910652	99	28	22,4	cyclictest	2856792	-21	kworker/u8:1+flush-259:0	07:29:59	3
2910647	99	28	26,2	cyclictest	3066848	-21	kworker/u8:4+flush-259:0	10:00:22	2
2910647	99	28	25,2	cyclictest	3172469	-21	kworker/u8:0+flush-259:0	11:30:16	2
2910647	99	28	24,3	cyclictest	3119738	-21	kworker/u8:0+events_unbound	10:35:21	2
2910647	99	28	24,3	cyclictest	2972828	-21	kworker/u8:1+events_unbound	09:45:17	2
2910647	99	27	24,2	cyclictest	3035316	-21	kworker/u8:2+flush-259:0	09:10:16	2
2910647	99	27	24,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	09:30:21	2
2910647	99	27	23,3	cyclictest	3172469	-21	kworker/u8:0+events_unbound	11:50:13	2
2910647	99	27	23,3	cyclictest	3150703	-21	kworker/u8:0+events_unbound	11:05:27	2
2910652	99	26	22,2	cyclictest	2921470	-21	apt-get	07:20:12	3
2910647	99	26	23,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	09:20:19	2
2910647	99	26	22,3	cyclictest	3161747	-21	kworker/u8:2+events_unbound	11:45:12	2
2910647	99	26	18,5	cyclictest	3161747	-21	kworker/u8:2+flush-259:0	12:00:00	2
2910644	99	26	23,2	cyclictest	2972828	-21	kworker/u8:1+flush-259:0	08:40:01	1
2910644	99	26	20,5	cyclictest	2971913	-21	ntpq	08:05:22	1
2910644	99	26	20,5	cyclictest	2971913	-21	ntpq	08:05:21	1
2910640	99	26	22,3	cyclictest	3130301	-21	kworker/u8:1+flush-259:0	10:40:15	0
2910652	99	25	20,3	cyclictest	3030229	-21	apt-get	09:05:11	3
2910652	99	25	19,4	cyclictest	335557	-21	systemd-journal	12:10:00	3
2910644	99	25	21,3	cyclictest	2993714	-21	apt-get	08:30:11	1
2910640	99	25	21,3	cyclictest	3150703	-21	kworker/u8:0+flush-259:0	11:05:25	0
2910640	99	25	20,4	cyclictest	3087469	-21	gpgv	10:00:00	0
2910652	99	24	20,3	cyclictest	2972828	-21	kworker/u8:1+events_unbound	09:50:16	3
2910652	99	24	19,3	cyclictest	3953151	-21	kworker/u8:0+flush-259:0	07:30:19	3
2910647	99	24	21,2	cyclictest	3953151	-21	kworker/u8:0+events_unbound	07:30:19	2
2910647	99	24	21,2	cyclictest	3208425	-21	kworker/u8:1+flush-259:0	12:00:17	2
2910647	99	24	21,2	cyclictest	2926008	-21	kworker/u8:2+events_unbound	07:50:14	2
2910647	99	24	20,3	cyclictest	2972828	-21	kworker/u8:1+events_unbound	09:05:12	2
2910647	99	24	16,6	cyclictest	335557	-21	systemd-journal	10:55:00	2
2910644	99	24	20,2	cyclictest	3077211	-21	/usr/sbin/munin	09:50:12	1
2910640	99	24	19,4	cyclictest	3151444	-21	apt-get	11:00:12	0
2910652	99	23	20,2	cyclictest	3161747	-21	kworker/u8:2+events_unbound	11:10:18	3
2910652	99	23	20,2	cyclictest	2926008	-21	kworker/u8:2+flush-259:0	07:45:20	3
2910652	99	23	20,2	cyclictest	2926008	-21	kworker/u8:2+events_unbound	07:50:28	3
2910652	99	23	19,3	cyclictest	3140689	-21	apt-get	10:50:12	3
2910652	99	23	18,3	cyclictest	2999278	-21	/usr/sbin/munin	08:35:25	3
2910652	99	23	16,5	cyclictest	3160636	-21	ntpq	11:05:21	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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