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

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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 376 highest latencies:

System rackeslot4s.osadl.org (updated Sat Mar 14, 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
1985984	99	60	56,2	cyclictest	2105007	-21	fwupd	21:03:24	1
1985991	99	46	43,2	cyclictest	75	-21	kswapd0	21:03:23	3
1985988	99	42	39,1	cyclictest	2012143	-21	kworker/2:1+pm	21:03:20	2
1985991	99	40	35,4	cyclictest	252	-21	systemd-journal	19:29:59	3
1985984	99	37	32,3	cyclictest	2193474	-21	base64	22:30:00	1
1985981	99	37	30,5	cyclictest	2225175	-21	latency_hist	23:00:01	0
1985991	99	32	27,4	cyclictest	252	-21	systemd-journal	23:49:59	3
1985984	99	31	28,2	cyclictest	2069396	-21	kworker/u8:0+flush-259:0	20:50:14	1
1985981	99	31	0,30	cyclictest	1	-21	systemd	19:39:59	0
1985991	99	30	27,2	cyclictest	2225435	-21	apt-get	23:00:11	3
1985988	99	29	25,3	cyclictest	2157501	-21	kworker/u8:0+flush-259:0	22:05:00	2
1985984	99	29	25,3	cyclictest	252	-21	systemd-journal	20:30:21	1
1985984	99	29	24,4	cyclictest	2177852	-21	latency_hist	22:15:01	1
1985981	99	29	26,2	cyclictest	1942777	-21	kworker/u8:0+events_unbound	19:30:13	0
1985988	99	27	23,3	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	22:55:15	2
1985988	99	27	23,3	cyclictest	2136192	-21	kworker/u8:2+flush-259:0	21:45:00	2
1985981	99	27	23,3	cyclictest	2017518	-21	apt-get	19:40:11	0
1985988	99	26	21,4	cyclictest	1980774	-21	kworker/u8:3+flush-259:0	20:00:15	2
1985988	99	26	20,4	cyclictest	252	-21	systemd-journal	21:55:23	2
1985988	99	26	20,4	cyclictest	252	-21	systemd-journal	21:55:23	2
1985991	99	24	20,3	cyclictest	2177709	-21	kworker/u8:3+flush-259:0	22:20:24	3
1985991	99	24	18,4	cyclictest	509	-21	rs:main		3
1985991	99	24	17,5	cyclictest	2001509	-21	gpgv	19:25:00	3
1985984	99	24	20,3	cyclictest	2002081	-21	apt-get	19:25:12	1
1985981	99	24	21,2	cyclictest	2281730	-21	kworker/u8:3+flush-259:0	00:10:16	0
1985981	99	24	20,3	cyclictest	1942777	-21	kworker/u8:0+flush-259:0	19:10:13	0
1985981	99	24	19,3	cyclictest	509	-21	rs:main		0
1985991	99	23	17,5	cyclictest	2219962	-21	latency_hist	22:55:01	3
1985984	99	23	20,2	cyclictest	2115782	-21	kworker/u8:0+flush-259:0	21:35:13	1
1985984	99	23	19,3	cyclictest	2313250	-21	gpgv	00:25:01	1
1985991	99	22	18,3	cyclictest	2064071	-21	kworker/u8:2+flush-259:0	20:35:22	3
1985991	99	22	17,4	cyclictest	2042967	-21	apt-get	20:05:02	3
1985991	99	22	17,3	cyclictest	2069396	-21	kworker/u8:0+flush-259:0	20:50:17	3
1985991	99	22	16,4	cyclictest	1991090	-21	latency_hist	19:15:00	3
1985981	99	22	19,2	cyclictest	2017279	-21	kworker/u8:2+flush-259:0	20:05:14	0
1985981	99	22	18,3	cyclictest	2167587	-21	kworker/u8:2+events_unbound	23:10:13	0
1985981	99	22	15,5	cyclictest	2291732	-21	ntpq	00:00:20	0
1985991	99	21	16,3	cyclictest	2053963	-21	/usr/sbin/munin	20:15:14	3
1985991	99	21	15,4	cyclictest	252	-21	systemd-journal	00:00:01	3
1985984	99	21	7,8	cyclictest	2266370	-21	munin-run	23:39:59	1
1985984	99	21	19,2	cyclictest	1942777	-21	kworker/u8:0+events_unbound	19:30:23	1
1985984	99	21	18,2	cyclictest	2115782	-21	kworker/u8:0+flush-259:0	21:30:23	1
1985984	99	21	17,3	cyclictest	2204029	-21	apt-get	22:40:02	1
1985984	99	21	17,3	cyclictest	1942777	-21	kworker/u8:0+flush-259:0	19:20:15	1
1985981	99	21	18,2	cyclictest	2287691	-21	kworker/u8:0+events_unbound	00:30:14	0
1985981	99	21	17,3	cyclictest	2152163	-21	base64	21:50:01	0
1985991	99	20	16,3	cyclictest	2100034	-21	kworker/u8:3+flush-259:0	21:20:16	3
1985988	99	20	16,3	cyclictest	2100034	-21	kworker/u8:3+flush-259:0	21:25:16	2
1985984	99	20	17,2	cyclictest	2318806	-21	kworker/u8:2+events_unbound	00:35:01	1
1985984	99	20	17,2	cyclictest	2053356	-21	kworker/u8:0+events_unbound	20:15:21	1
1985984	99	20	17,2	cyclictest	1942777	-21	kworker/u8:0+events_unbound	19:45:22	1
1985984	99	20	16,3	cyclictest	2277350	-21	apt-get	23:50:11	1
1985981	99	20	17,2	cyclictest	2027531	-21	kworker/u8:4+flush-259:0	19:55:16	0
1985981	99	20	15,4	cyclictest	2026652	-21	ntpq	19:45:19	0
1985981	99	20	1,17	cyclictest	2193358	-21	munin-run	22:30:00	0
1985991	99	19	12,5	cyclictest	2151647	-21	latency_hist	21:50:00	3
1985991	99	19	11,6	cyclictest	2068268	-21	ntpq	20:25:20	3
1985988	99	19	14,4	cyclictest	1980774	-21	kworker/u8:3+flush-259:0	20:25:24	2
1985988	99	19	14,3	cyclictest	2053356	-21	kworker/u8:0+flush-259:0	20:15:17	2
1985988	99	19	13,4	cyclictest	2136164	-21	latency_hist	21:35:00	2
1985988	99	19	13,4	cyclictest	2048802	-21	/usr/sbin/munin	20:10:20	2
1985984	99	19	15,3	cyclictest	2272190	-21	apt-get	23:45:11	1
1985981	99	19	16,2	cyclictest	2281730	-21	kworker/u8:3+flush-259:0	23:55:27	0
1985981	99	19	14,4	cyclictest	2266364	-21	latency_hist	23:40:01	0
1985991	99	18	14,3	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	22:35:22	3
1985988	99	18	15,2	cyclictest	2241333	-21	irqcore	23:15:13	2
1985988	99	18	14,3	cyclictest	2027531	-21	kworker/u8:4+flush-259:0	19:50:20	2
1985984	99	18	16,1	cyclictest	2121380	-21	irqcore	21:20:15	1
1985984	99	18	14,3	cyclictest	2302925	-21	latency_hist	00:15:00	1
1985984	99	18	14,3	cyclictest	2151159	-21	kworker/u8:1+events_unbound	21:50:15	1
1985984	99	18	14,3	cyclictest	1980774	-21	kworker/u8:3+events_unbound	20:00:13	1
1985984	99	18	14,2	cyclictest	2971	-21	cron	21:10:00	1
1985984	99	18	13,4	cyclictest	2198026	-21	ntpq	22:30:20	1
1985981	99	18	14,3	cyclictest	2177709	-21	kworker/u8:3+flush-259:0	22:25:00	0
1985981	99	18	14,3	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	23:20:13	0
1985981	99	18	14,3	cyclictest	2089789	-21	kworker/u8:1+events_unbound	21:10:16	0
1985981	99	18	14,3	cyclictest	2069396	-21	kworker/u8:0+flush-259:0	20:40:21	0
1985981	99	18	13,3	cyclictest	2151836	-21	cp	21:50:00	0
1985991	99	17	14,2	cyclictest	2064071	-21	kworker/u8:2+flush-259:0	20:45:15	3
1985991	99	17	11,4	cyclictest	252	-21	systemd-journal	00:20:21	3
1985991	99	17	11,4	cyclictest	2220391	-21	diskstats	22:55:13	3
1985984	99	17	14,2	cyclictest	2183006	-21	sh	22:20:00	1
1985984	99	17	14,2	cyclictest	2167587	-21	kworker/u8:2+events_unbound	22:55:19	1
1985984	99	17	14,2	cyclictest	2157501	-21	kworker/u8:0+events_unbound	22:05:14	1
1985984	99	17	13,3	cyclictest	2281730	-21	kworker/u8:3+events_unbound	23:55:16	1
1985984	99	17	13,3	cyclictest	2027531	-21	kworker/u8:4+flush-259:0	19:50:18	1
1985984	99	17	11,4	cyclictest	2021497	-21	ntpq	19:40:20	1
1985981	99	17	14,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:01:52	0
1985981	99	17	14,2	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	22:40:05	0
1985981	99	17	14,2	cyclictest	2115782	-21	kworker/u8:0+flush-259:0	21:40:16	0
1985981	99	17	13,3	cyclictest	2177709	-21	kworker/u8:3+events_unbound	22:15:19	0
1985981	99	17	12,4	cyclictest	2094907	-21	latency_hist	20:55:01	0
1985981	99	17	10,5	cyclictest	2328556	-21	ntpq	00:35:19	0
1985991	99	16	9,5	cyclictest	1996255	-21	latency_hist	19:20:01	3
1985991	99	16	10,4	cyclictest	2042967	-21	apt-get	20:05:00	3
1985988	99	16	9,5	cyclictest	2016336	-21	ntpq	19:35:20	2
1985988	99	16	13,2	cyclictest	2318806	-21	kworker/u8:2+flush-259:0	00:35:16	2
1985988	99	16	13,2	cyclictest	2281730	-21	kworker/u8:3+flush-259:0	00:20:00	2
1985988	99	16	11,3	cyclictest	252	-21	systemd-journal	19:19:22	2
1985984	99	16	13,2	cyclictest	2183046	-21	kworker/u8:0+events_unbound	23:25:18	1
1985984	99	16	13,2	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	23:20:17	1
1985984	99	16	13,2	cyclictest	2151159	-21	kworker/u8:1+flush-259:0	22:00:23	1
1985984	99	16	13,2	cyclictest	2115782	-21	kworker/u8:0+flush-259:0	21:17:39	1
1985984	99	16	12,3	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	23:30:16	1
1985984	99	16	11,4	cyclictest	2032933	-21	apt-get	19:55:13	1
1985984	99	16	11,3	cyclictest	2199145	-21	/usr/sbin/munin	22:35:19	1
1985981	99	16	14,2	cyclictest	2167587	-21	kworker/u8:2+events_unbound	23:15:11	0
1985981	99	16	13,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:25:15	0
1985981	99	16	12,3	cyclictest	2115782	-21	kworker/u8:0+events_unbound	21:35:00	0
1985981	99	16	12,3	cyclictest	1980774	-21	kworker/u8:3+events_unbound	20:10:24	0
1985991	99	15	12,2	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	22:45:27	3
1985991	99	15	12,2	cyclictest	2032657	-21	idleruntime-cro	19:55:00	3
1985988	99	15	10,4	cyclictest	2313339	-21	gpgv	00:25:01	2
1985988	99	15	0,8	cyclictest	507	-21	in:imuxsock	23:39:59	2
1985984	99	15	11,3	cyclictest	2089789	-21	kworker/u8:1+flush-259:0	21:10:18	1
1985984	99	15	10,4	cyclictest	2287691	-21	kworker/u8:0+flush-259:0	00:30:15	1
1985984	99	15	10,4	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	23:10:00	1
1985981	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:25:24	0
1985981	99	15	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:55:17	0
1985981	99	15	13,1	cyclictest	2308041	-21	idleruntime-cro	00:20:00	0
1985981	99	15	13,1	cyclictest	0	-21	swapper/0	22:00:00	0
1985981	99	15	13,1	cyclictest	0	-21	swapper/0	22:00:00	0
1985981	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:20:11	0
1985981	99	15	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:35:18	0
1985981	99	15	12,2	cyclictest	2000499	-21	ntp_kernel_pll_	19:20:17	0
1985981	99	15	11,3	cyclictest	2167587	-21	kworker/u8:2+events_unbound	23:05:19	0
1985981	99	15	11,3	cyclictest	2151159	-21	kworker/u8:1+events_unbound	22:00:14	0
1985981	99	15	11,2	cyclictest	0	-21	swapper/0	20:19:59	0
1985991	99	14	8,4	cyclictest	252	-21	systemd-journal	19:36:22	3
1985991	99	14	8,4	cyclictest	2230351	-21	kworker/u8:1+flush-259:0	23:15:00	3
1985988	99	14	9,4	cyclictest	252	-21	systemd-journal	23:10:00	2
1985988	99	14	9,4	cyclictest	252	-21	systemd-journal	22:10:00	2
1985988	99	14	6,6	cyclictest	2286518	-21	ntpq	23:55:21	2
1985988	99	14	11,2	cyclictest	2215474	-21	irqcore	22:50:16	2
1985988	99	14	11,2	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	22:45:26	2
1985988	99	14	10,3	cyclictest	2281730	-21	kworker/u8:3+flush-259:0	00:15:00	2
1985988	99	14	10,3	cyclictest	2271560	-21	kworker/u8:2+flush-259:0	23:50:00	2
1985984	99	14	11,2	cyclictest	2256117	-21	kworker/u8:1+events_unbound	00:25:23	1
1985984	99	14	11,2	cyclictest	1942777	-21	kworker/u8:0+flush-259:0	19:10:18	1
1985984	99	14	11,1	cyclictest	0	-21	swapper/1	00:00:16	1
1985984	99	14	10,3	cyclictest	2069396	-21	kworker/u8:0+events_unbound	20:40:14	1
1985981	99	14	13,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:15:06	0
1985981	99	14	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:11:26	0
1985981	99	14	12,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	20:30:04	0
1985981	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:30:10	0
1985981	99	14	12,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:00:14	0
1985981	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:15:11	0
1985981	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	21:05:10	0
1985981	99	14	11,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:50:25	0
1985981	99	14	10,3	cyclictest	2157501	-21	kworker/u8:0+flush-259:0	22:05:20	0
1985991	99	13	7,5	cyclictest	2176955	-21	ntpq	22:10:19	3
1985991	99	13	11,1	cyclictest	0	-21	swapper/3	22:30:01	3
1985991	99	13	11,1	cyclictest	0	-21	swapper/3	00:30:15	3
1985991	99	13	10,2	cyclictest	2135696	-21	unixbench_multi	21:30:22	3
1985988	99	13	9,3	cyclictest	2183046	-21	kworker/u8:0+flush-259:0	23:25:27	2
1985988	99	13	9,2	cyclictest	252	-21	systemd-journal	21:06:23	2
1985988	99	13	8,4	cyclictest	2115782	-21	kworker/u8:0+flush-259:0	21:20:00	2
1985988	99	13	11,1	cyclictest	0	-21	swapper/2	23:15:00	2
1985988	99	13	11,1	cyclictest	0	-21	swapper/2	19:35:00	2
1985988	99	13	10,2	cyclictest	2022417	-21	latency_hist	19:45:00	2
1985984	99	13	8,4	cyclictest	2141606	-21	apt-get	21:40:11	1
1985984	99	13	10,2	cyclictest	2167587	-21	kworker/u8:2+events_unbound	23:15:17	1
1985981	99	13	11,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:49:59	0
1985981	99	13	10,2	cyclictest	2058789	-21	kworker/u8:1+events_unbound	20:25:17	0
1985981	99	13	10,2	cyclictest	1980774	-21	kworker/u8:3+flush-259:0	19:25:21	0
1985991	99	12	9,2	cyclictest	2298111	-21	cpuspeed_turbos	00:10:13	3
1985991	99	12	9,2	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	23:35:21	3
1985991	99	12	9,2	cyclictest	2161959	-21	unixbench_singl	21:55:23	3
1985991	99	12	9,2	cyclictest	2161959	-21	unixbench_singl	21:55:23	3
1985991	99	12	9,2	cyclictest	2146066	-21	unixbench_singl	21:40:24	3
1985991	99	12	8,3	cyclictest	2256117	-21	kworker/u8:1+flush-259:0	00:16:01	3
1985991	99	12	8,3	cyclictest	2182717	-21	journal-offline	22:16:47	3
1985991	99	12	7,4	cyclictest	2167587	-21	kworker/u8:2+flush-259:0	23:35:00	3
1985991	99	12	1,4	cyclictest	2011485	2	sort	19:30:23	3
1985991	99	12	1,10	cyclictest	252	-21	systemd-journal	22:05:00	3
1985991	99	12	10,1	cyclictest	0	-21	swapper/3	22:40:17	3
1985988	99	12	9,2	cyclictest	2197895	-21	needreboot	22:30:18	2
1985988	99	12	8,3	cyclictest	2069396	-21	kworker/u8:0+flush-259:0	20:50:26	2
1985984	99	12	9,2	cyclictest	2095586	-21	irqcore	20:55:16	1
1985984	99	12	9,2	cyclictest	0	-21	swapper/1	21:25:15	1
1985984	99	12	8,3	cyclictest	2151159	-21	kworker/u8:1+events_unbound	21:55:21	1
1985984	99	12	8,3	cyclictest	2151159	-21	kworker/u8:1+events_unbound	21:55:21	1
1985984	99	12	8,3	cyclictest	2074823	-21	fschecks_time	20:35:13	1
1985984	99	12	8,2	cyclictest	2053295	-21	unixbench_singl	20:10:25	1
1985984	99	12	8,2	cyclictest	0	-21	swapper/1	20:50:01	1
1985984	99	12	8,2	cyclictest	0	-21	swapper/1	19:35:15	1
1985981	99	12	11,1	cyclictest	603	50	irq/132-enp0s29f1:rx-0	22:30:16	0
1985991	99	11	9,1	cyclictest	0	-21	swapper/3	22:35:00	3
1985991	99	11	8,2	cyclictest	2292611	-21	idleruntime-cro	00:05:00	3
1985991	99	11	7,2	cyclictest	2157501	-21	kworker/u8:0+flush-259:0	22:05:15	3
1985988	99	11	8,2	cyclictest	2147168	-21	sed	21:45:17	2
1985988	99	11	8,2	cyclictest	2001391	-21	latency_hist	19:25:01	2
1985988	99	11	7,3	cyclictest	2064071	-21	kworker/u8:2+events_unbound	20:45:15	2
1985991	99	10	7,2	cyclictest	0	-21	swapper/3	23:15:22	3
1985991	99	10	7,2	cyclictest	0	-21	swapper/3	19:40:16	3
1985991	99	10	7,1	cyclictest	503	-21	tpm2-abrmd	20:15:01	3
1985991	99	10	5,3	cyclictest	490	-21	dbus-daemon	21:00:01	3
1985991	99	10	1,7	cyclictest	2157276	-21	latency_hist	21:55:00	3
1985991	99	10	0,9	cyclictest	2084663	-21	cat	20:45:01	3
1985988	99	10	8,1	cyclictest	0	-21	swapper/2	00:05:00	2
1985991	99	9	7,1	cyclictest	0	-21	swapper/3	20:30:23	3
1985991	99	9	4,3	cyclictest	2281356	-21	ntpq	23:50:20	3
1985991	99	8	6,1	cyclictest	832	-21	runrttasks	00:05:12	3
1985991	99	8	4,2	cyclictest	2246384	-21	if_enp0s30f4	23:20:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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