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 Tue Feb 03, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2079964	99	46	40,4	cyclictest	2205207	-21	cat	09:15:01	3
2079957	99	43	40,2	cyclictest	2288766	-21	kworker/u8:0+flush-259:0	10:45:00	2
2079964	99	39	32,5	cyclictest	2121585	-21	latency_hist	07:50:01	3
2079964	99	38	31,5	cyclictest	2355990	-21	kworker/u8:2+flush-259:0	11:55:18	3
2079952	99	36	30,4	cyclictest	2408249	-21	latency_hist	12:30:01	0
2079957	99	35	28,5	cyclictest	2110438	-21	ntpq	07:35:21	2
2079953	99	35	30,4	cyclictest	2346163	-21	apt-get	11:30:11	1
2079957	99	34	28,4	cyclictest	2387221	-21	latency_hist	12:10:01	2
2079957	99	34	28,4	cyclictest	2387221	-21	latency_hist	12:10:01	2
2079957	99	34	26,6	cyclictest	2241064	-21	ntpq	09:45:20	2
2079953	99	34	28,4	cyclictest	2148358	-21	latency_hist	08:20:01	1
2079952	99	34	27,5	cyclictest	2339457	-21	ntpq	11:20:22	0
2079957	99	33	28,4	cyclictest	2247595	-21	latency_hist	09:55:01	2
2079952	99	33	28,3	cyclictest	2200089	-21	apt-get	09:10:12	0
2079957	99	32	29,2	cyclictest	2069278	-21	kworker/u8:0+flush-259:0	08:00:15	2
2079957	99	31	27,3	cyclictest	2330240	-21	kworker/u8:3+events_unbound	12:25:12	2
2079957	99	31	26,4	cyclictest	2074836	-21	kworker/u8:1+events_unbound	07:10:13	2
2079957	99	31	26,3	cyclictest	2345484	-21	apt-get	11:30:01	2
2079957	99	30	27,2	cyclictest	2074836	-21	kworker/u8:1+events_unbound	07:20:24	2
2079957	99	30	26,3	cyclictest	2309564	-21	kworker/u8:1+flush-259:0	11:25:24	2
2079957	99	30	23,5	cyclictest	2183554	-21	ntpq	08:50:22	2
2079953	99	30	25,3	cyclictest	2095653	-21	/usr/sbin/munin	07:25:14	1
2079952	99	30	24,4	cyclictest	2344651	-21	ntpq	11:25:21	0
2079953	99	28	23,4	cyclictest	2120758	-21	ntpq	07:45:22	1
2079952	99	28	15,5	cyclictest	2226135	-21	gpgv	09:35:01	0
2079964	99	27	20,5	cyclictest	2262123	-21	ntpq	10:05:23	3
2079957	99	27	23,3	cyclictest	2210295	-21	kworker/u8:1+flush-259:0	09:55:26	2
2079957	99	27	20,4	cyclictest	2413388	-21	latency_hist	12:35:01	2
2079953	99	27	24,2	cyclictest	2210295	-21	kworker/u8:1+flush-259:0	09:45:15	1
2079964	99	26	22,3	cyclictest	2069278	-21	kworker/u8:0+flush-259:0	07:35:24	3
2079957	99	26	22,3	cyclictest	2288766	-21	kworker/u8:0+flush-259:0	10:45:21	2
2079953	99	26	22,3	cyclictest	2106127	-21	latency_hist	07:35:00	1
2079952	99	26	23,2	cyclictest	2330240	-21	kworker/u8:3+events_unbound	11:35:16	0
2079952	99	26	20,4	cyclictest	2115553	-21	ntpq	07:40:20	0
2079964	99	25	19,4	cyclictest	252	-21	systemd-journal	08:43:35	3
2079964	99	25	19,4	cyclictest	2204990	-21	apt-get	09:15:02	3
2079957	99	25	22,2	cyclictest	2200055	-21	kworker/u8:0+events_unbound	09:15:16	2
2079957	99	25	22,2	cyclictest	2069278	-21	kworker/u8:0+flush-259:0	07:40:24	2
2079957	99	25	21,3	cyclictest	2221121	-21	apt-get	09:30:12	2
2079957	99	25	21,3	cyclictest	2215740	-21	kworker/u8:0+flush-259:0	09:35:25	2
2079953	99	25	20,4	cyclictest	2382346	-21	apt-get	12:05:12	1
2079953	99	25	20,4	cyclictest	2382346	-21	apt-get	12:05:11	1
2079952	99	25	21,3	cyclictest	2132079	-21	kworker/u8:3+events_unbound	08:05:13	0
2079952	99	25	0,23	cyclictest	1	-21	systemd	09:58:34	0
2079964	99	24	17,4	cyclictest	252	-21	systemd-journal	09:03:51	3
2079957	99	24	21,2	cyclictest	2397549	-21	kworker/u8:2+flush-259:0	12:35:20	2
2079957	99	24	21,2	cyclictest	2309564	-21	kworker/u8:1+events_unbound	11:10:22	2
2079957	99	24	21,2	cyclictest	2262997	-21	kworker/u8:1+flush-259:0	10:30:00	2
2079953	99	24	21,2	cyclictest	2074836	-21	kworker/u8:1+flush-259:0	07:15:20	1
2079953	99	24	20,3	cyclictest	2105838	-21	kworker/u8:2+events_unbound	09:00:23	1
2079953	99	24	17,5	cyclictest	2293881	-21	latency_hist	10:40:01	1
2079964	99	23	18,4	cyclictest	2345484	-21	apt-get	11:29:59	3
2079957	99	23	20,2	cyclictest	2215740	-21	kworker/u8:0+flush-259:0	10:10:23	2
2079957	99	23	20,2	cyclictest	2153539	-21	kworker/u8:3+events_unbound	08:30:15	2
2079957	99	23	19,3	cyclictest	2355990	-21	kworker/u8:2+events_unbound	11:45:23	2
2079957	99	23	19,3	cyclictest	2111303	-21	kworker/u8:1+events_unbound	07:55:02	2
2079957	99	23	18,3	cyclictest	2179288	-21	kworker/u8:3+events_unbound	09:15:00	2
2079957	99	23	15,5	cyclictest	2142969	-21	cat	08:15:01	2
2079953	99	23	21,1	cyclictest	2215740	-21	kworker/u8:0+events_unbound	09:35:14	1
2079952	99	23	19,3	cyclictest	2289006	-21	apt-get	10:35:11	0
2079952	99	23	18,3	cyclictest	2330248	-21	/usr/sbin/munin	11:15:23	0
2079952	99	23	17,4	cyclictest	2168087	-21	ntpq	08:35:21	0
2079964	99	22	17,4	cyclictest	2309564	-21	kworker/u8:1+flush-259:0	11:10:00	3
2079964	99	22	16,4	cyclictest	252	-21	systemd-journal	07:23:35	3
2079953	99	22	19,2	cyclictest	2355990	-21	kworker/u8:2+flush-259:0	11:45:15	1
2079953	99	22	17,4	cyclictest	2330009	-21	latency_hist	11:15:02	1
2079953	99	22	15,5	cyclictest	2184409	-21	latency_hist	08:55:01	1
2079964	99	21	15,4	cyclictest	2402696	-21	apt-key	12:25:01	3
2079964	99	21	15,4	cyclictest	2131847	-21	latency_hist	08:00:01	3
2079957	99	21	18,2	cyclictest	2330240	-21	kworker/u8:3+events_unbound	12:20:23	2
2079957	99	21	18,2	cyclictest	2179288	-21	kworker/u8:3+events_unbound	08:55:13	2
2079957	99	21	18,2	cyclictest	2111303	-21	kworker/u8:1+flush-259:0	07:50:24	2
2079957	99	21	17,3	cyclictest	2330240	-21	kworker/u8:3+events_unbound	12:02:36	2
2079957	99	21	15,4	cyclictest	2314733	-21	/usr/sbin/munin	11:00:13	2
2079957	99	21	15,3	cyclictest	252	-21	systemd-journal	09:28:34	2
2079953	99	21	18,2	cyclictest	2262997	-21	kworker/u8:1+flush-259:0	10:25:21	1
2079953	99	21	17,3	cyclictest	2330240	-21	kworker/u8:3+flush-259:0	12:30:21	1
2079953	99	21	17,3	cyclictest	2330240	-21	kworker/u8:3+flush-259:0	12:10:23	1
2079953	99	21	17,3	cyclictest	2330240	-21	kworker/u8:3+flush-259:0	12:00:22	1
2079953	99	21	17,3	cyclictest	2210295	-21	kworker/u8:1+flush-259:0	09:55:15	1
2079953	99	21	14,5	cyclictest	2256989	-21	ntpq	10:00:21	1
2079953	99	21	14,5	cyclictest	2142797	-21	latency_hist	08:15:01	1
2079952	99	21	18,2	cyclictest	2371724	-21	idleruntime-cro	11:55:00	0
2079964	99	20	14,4	cyclictest	252	-21	systemd-journal	09:10:00	3
2079957	99	20	16,3	cyclictest	2324825	-21	kworker/u8:4+events_unbound	11:15:13	2
2079957	99	20	16,3	cyclictest	2215740	-21	kworker/u8:0+flush-259:0	09:40:22	2
2079957	99	20	16,3	cyclictest	2041086	-21	kworker/u8:2+events_unbound	07:15:11	2
2079953	99	20	17,2	cyclictest	2330240	-21	kworker/u8:3+events_unbound	12:15:21	1
2079953	99	20	16,3	cyclictest	2355990	-21	kworker/u8:2+flush-259:0	12:00:00	1
2079953	99	20	16,3	cyclictest	2340358	-21	kworker/u8:0+flush-259:0	11:40:16	1
2079953	99	20	16,3	cyclictest	2330240	-21	kworker/u8:3+flush-259:0	11:35:18	1
2079953	99	20	16,3	cyclictest	2309564	-21	kworker/u8:1+flush-259:0	11:15:21	1
2079953	99	20	16,3	cyclictest	2111303	-21	kworker/u8:1+flush-259:0	07:50:21	1
2079952	99	20	16,3	cyclictest	2309564	-21	kworker/u8:1+flush-259:0	10:55:17	0
2079952	99	20	13,5	cyclictest	252	-21	systemd-journal	11:05:00	0
2079964	99	19	15,3	cyclictest	2330240	-21	kworker/u8:3+flush-259:0	11:55:00	3
2079957	99	19	16,2	cyclictest	2330240	-21	kworker/u8:3+events_unbound	11:50:22	2
2079957	99	19	16,2	cyclictest	2309564	-21	kworker/u8:1+events_unbound	11:05:12	2
2079957	99	19	16,2	cyclictest	2168978	-21	sh	08:40:00	2
2079957	99	19	16,2	cyclictest	2142046	-21	kworker/u8:1+events_unbound	08:45:24	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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