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 May 05, 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
123995	99	47	41,4	cyclictest	248283	-21	latency_hist	09:10:00	2
123988	99	45	39,4	cyclictest	344430	-21	latency_hist	11:00:00	0
123997	99	43	40,2	cyclictest	285369	-21	kworker/u8:2+flush-259:0	11:29:59	3
123995	99	36	30,4	cyclictest	129109	-21	apt-get	07:15:01	2
123988	99	36	29,5	cyclictest	252	-21	systemd-journal	12:39:59	0
123992	99	34	28,4	cyclictest	284520	-21	ntpq	09:45:21	1
123997	99	33	30,2	cyclictest	263700	-21	kworker/u8:0+flush-259:0	10:15:15	3
123997	99	33	30,2	cyclictest	1286454	-21	kworker/u8:2+flush-259:0	07:55:27	3
123995	99	33	30,3	cyclictest	370027	-21	kworker/u8:0+flush-259:0	11:25:25	2
123997	99	32	28,2	cyclictest	1286454	-21	kworker/u8:2+flush-259:0	08:40:21	3
123995	99	32	28,3	cyclictest	263700	-21	kworker/u8:0+flush-259:0	10:05:00	2
123995	99	32	25,5	cyclictest	150505	-21	latency_hist	07:35:00	2
123992	99	32	26,4	cyclictest	416624	-21	latency_hist	12:10:01	1
123995	99	31	28,2	cyclictest	274040	-21	kworker/u8:1+flush-259:0	09:45:23	2
123995	99	31	27,3	cyclictest	291153	-21	kworker/u8:3+flush-259:0	10:05:23	2
123995	99	31	27,3	cyclictest	1286454	-21	kworker/u8:2+events_unbound	08:40:25	2
123992	99	31	24,5	cyclictest	252552	-21	ntpq	09:10:22	1
123995	99	30	27,2	cyclictest	232866	-21	kworker/u8:3+events_unbound	09:35:27	2
123995	99	30	24,4	cyclictest	176222	-21	latency_hist	08:00:01	2
123997	99	29	26,2	cyclictest	375179	-21	kworker/u8:3+flush-259:0	11:50:26	3
123997	99	29	26,2	cyclictest	375179	-21	kworker/u8:3+flush-259:0	11:50:25	3
123995	99	29	24,3	cyclictest	252	-21	systemd-journal	08:13:51	2
123988	99	29	25,3	cyclictest	405919	-21	kworker/u8:2+flush-259:0	12:25:17	0
123997	99	28	25,2	cyclictest	411498	-21	kworker/u8:0+flush-259:0	12:05:21	3
123997	99	28	25,2	cyclictest	1286454	-21	kworker/u8:2+events_unbound	09:15:20	3
123997	99	28	24,3	cyclictest	263700	-21	kworker/u8:0+flush-259:0	09:55:24	3
123992	99	28	22,4	cyclictest	207368	-21	/usr/sbin/munin	08:30:15	1
123992	99	28	22,4	cyclictest	190795	-21	ntpq	08:10:21	1
123988	99	28	22,4	cyclictest	139811	-21	latency_hist	07:25:00	0
123988	99	28	21,5	cyclictest	154761	-21	ntpq	07:35:21	0
123997	99	27	25,2	cyclictest	171080	-21	kworker/u8:1+events_unbound	08:49:28	3
123995	99	27	24,2	cyclictest	285369	-21	kworker/u8:2+flush-259:0	10:25:16	2
123995	99	27	24,2	cyclictest	232866	-21	kworker/u8:3+events_unbound	09:29:57	2
123995	99	27	22,4	cyclictest	375179	-21	kworker/u8:3+flush-259:0	11:45:25	2
123988	99	27	21,4	cyclictest	252	-21	systemd-journal	11:53:25	0
123988	99	27	21,4	cyclictest	252	-21	systemd-journal	11:53:25	0
123997	99	26	24,2	cyclictest	118860	-21	kworker/u8:3+events_unbound	07:27:27	3
123997	99	26	23,2	cyclictest	375179	-21	kworker/u8:3+events_unbound	11:47:26	3
123997	99	26	23,2	cyclictest	285369	-21	kworker/u8:2+flush-259:0	10:35:11	3
123997	99	26	23,2	cyclictest	171080	-21	kworker/u8:1+events_unbound	08:05:27	3
123997	99	26	23,2	cyclictest	118860	-21	kworker/u8:3+events_unbound	07:10:23	3
123995	99	26	22,3	cyclictest	171080	-21	kworker/u8:1+events_unbound	08:45:14	2
123995	99	26	22,3	cyclictest	1286454	-21	kworker/u8:2+events_unbound	09:24:56	2
123995	99	26	21,3	cyclictest	509	-21	rs:main		2
123988	99	26	21,4	cyclictest	427202	-21	apt-get	12:18:20	0
123988	99	26	20,4	cyclictest	253417	-21	latency_hist	09:15:01	0
123988	99	26	20,4	cyclictest	252	-21	systemd-journal	09:03:25	0
123995	99	25	22,2	cyclictest	323814	-21	kworker/u8:1+flush-259:0	11:24:59	2
123995	99	25	22,2	cyclictest	285369	-21	kworker/u8:2+flush-259:0	10:20:26	2
123992	99	25	20,4	cyclictest	238269	-21	apt-get	09:00:12	1
123997	99	24	21,2	cyclictest	405919	-21	kworker/u8:2+events_unbound	12:25:24	3
123997	99	24	21,2	cyclictest	308376	-21	kworker/u8:3+events_unbound	10:29:17	3
123997	99	24	21,2	cyclictest	232866	-21	kworker/u8:3+flush-259:0	09:25:26	3
123997	99	24	21,2	cyclictest	1286454	-21	kworker/u8:2+events_unbound	08:25:14	3
123997	99	24	20,3	cyclictest	285369	-21	kworker/u8:2+flush-259:0	10:45:23	3
123995	99	24	22,2	cyclictest	375179	-21	kworker/u8:3+events_unbound	11:54:36	2
123995	99	24	22,2	cyclictest	375179	-21	kworker/u8:3+events_unbound	11:54:35	2
123995	99	24	21,2	cyclictest	1286454	-21	kworker/u8:2+events_unbound	08:30:17	2
123995	99	24	20,3	cyclictest	509	-21	rs:main		2
123995	99	24	20,3	cyclictest	263700	-21	kworker/u8:0+events_unbound	09:30:27	2
123995	99	24	20,3	cyclictest	1286454	-21	kworker/u8:2+events_unbound	08:53:27	2
123992	99	24	19,4	cyclictest	406558	-21	apt-get	12:00:11	1
123988	99	24	9,4	cyclictest	416624	-21	latency_hist	12:10:01	0
123988	99	24	19,3	cyclictest	509	-21	rs:main		0
123995	99	23	20,2	cyclictest	323814	-21	kworker/u8:1+events_unbound	11:15:13	2
123995	99	23	19,3	cyclictest	118860	-21	kworker/u8:3+flush-259:0	07:50:21	2
123988	99	23	18,4	cyclictest	401376	-21	apt-get	11:55:12	0
123997	99	22	19,2	cyclictest	263700	-21	kworker/u8:0+events_unbound	10:10:28	3
123997	99	22	19,2	cyclictest	171080	-21	kworker/u8:1+events_unbound	08:50:13	3
123997	99	22	18,3	cyclictest	509	-21	rs:main		3
123997	99	22	18,3	cyclictest	442671	-21	kworker/u8:1+events_unbound	12:37:36	3
123997	99	22	18,3	cyclictest	411498	-21	kworker/u8:0+events_unbound	12:20:34	3
123997	99	22	18,3	cyclictest	405919	-21	kworker/u8:2+events_unbound	11:56:27	3
123997	99	22	18,3	cyclictest	285369	-21	kworker/u8:2+events_unbound	10:20:19	3
123997	99	22	18,3	cyclictest	171080	-21	kworker/u8:1+flush-259:0	08:15:21	3
123995	99	22	19,2	cyclictest	375179	-21	kworker/u8:3+events_unbound	11:30:28	2
123995	99	22	19,2	cyclictest	1286454	-21	kworker/u8:2+events_unbound	08:20:23	2
123992	99	22	15,4	cyclictest	252	-21	systemd-journal	09:16:26	1
123992	99	22	0,3	cyclictest	201972	-21	awk	08:25:00	1
123997	99	21	18,3	cyclictest	1286454	-21	kworker/u8:2+events_unbound	09:05:23	3
123997	99	21	18,2	cyclictest	411498	-21	kworker/u8:0+events_unbound	12:14:39	3
123997	99	21	18,2	cyclictest	323814	-21	kworker/u8:1+events_unbound	11:10:20	3
123997	99	21	15,5	cyclictest	353835	-21	ntpq	11:05:22	3
123995	99	21	18,2	cyclictest	405919	-21	kworker/u8:2+flush-259:0	12:35:00	2
123995	99	21	18,2	cyclictest	285369	-21	kworker/u8:2+events_unbound	11:05:25	2
123995	99	21	18,2	cyclictest	232866	-21	kworker/u8:3+flush-259:0	09:10:28	2
123995	99	21	18,2	cyclictest	171080	-21	kworker/u8:1+flush-259:0	08:15:17	2
123995	99	21	18,2	cyclictest	171080	-21	kworker/u8:1+flush-259:0	08:05:26	2
123995	99	21	17,3	cyclictest	1286454	-21	kworker/u8:2+events_unbound	09:04:27	2
123995	99	21	13,5	cyclictest	138890	-21	ntpq	07:20:20	2
123992	99	21	8,2	cyclictest	0	-21	swapper/1	11:05:00	1
123992	99	21	15,4	cyclictest	252	-21	systemd-journal	07:56:26	1
123988	99	21	16,4	cyclictest	129223	-21	gpgv	07:15:00	0
123988	99	21	15,4	cyclictest	252	-21	systemd-journal	12:20:27	0
123988	99	21	15,4	cyclictest	252	-21	systemd-journal	10:55:00	0
123997	99	20	18,2	cyclictest	375179	-21	kworker/u8:3+flush-259:0	11:35:26	3
123997	99	20	18,2	cyclictest	291153	-21	kworker/u8:3+events_unbound	10:05:13	3
123997	99	20	17,3	cyclictest	274040	-21	kworker/u8:1+events_unbound	09:45:22	3
123997	99	20	17,2	cyclictest	422204	-21	kworker/u8:1+flush-259:0	12:15:10	3
123997	99	20	17,2	cyclictest	323814	-21	kworker/u8:1+flush-259:0	10:50:22	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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