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 Wed Jul 08, 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
3704931	99	46	40,4	cyclictest	3854716	-21	latency_hist	09:35:01	3
3704921	99	45	39,4	cyclictest	335557	-21	systemd-journal	12:35:13	0
3704921	99	42	39,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	10:56:13	0
3704925	99	39	33,4	cyclictest	335557	-21	systemd-journal	11:45:13	1
3704921	99	39	36,2	cyclictest	3984607	-21	kworker/u8:3+events_unbound	12:09:13	0
3704931	99	38	33,3	cyclictest	4041790	-21	journal-offline	12:34:13	3
3704921	99	38	34,3	cyclictest	3736056	-21	apt-get	07:40:12	0
3704929	99	37	33,3	cyclictest	3963983	-21	kworker/u8:2+flush-259:0	12:10:00	2
3704921	99	37	34,2	cyclictest	3869750	-21	kworker/u8:1+events_unbound	09:57:13	0
3704921	99	36	33,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	11:23:14	0
3704921	99	36	33,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	10:41:14	0
3704929	99	35	31,3	cyclictest	3886148	-21	gpgv	10:05:01	2
3704921	99	35	33,2	cyclictest	3766522	-21	kworker/u8:1+events_unbound	09:28:14	0
3704921	99	35	32,2	cyclictest	3766522	-21	kworker/u8:1+events_unbound	09:05:23	0
3704921	99	35	29,4	cyclictest	509	-21	rs:main		0
3704929	99	34	27,5	cyclictest	509	-21	rs:main		2
3704921	99	34	31,3	cyclictest	3807934	-21	kworker/u8:3+events_unbound	09:41:14	0
3704921	99	34	30,3	cyclictest	3963983	-21	kworker/u8:2+events_unbound	12:04:12	0
3704929	99	33	27,4	cyclictest	335557	-21	systemd-journal	12:00:13	2
3704921	99	33	30,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	11:14:14	0
3704921	99	33	30,2	cyclictest	3792450	-21	kworker/u8:2+events_unbound	08:45:15	0
3704921	99	33	30,2	cyclictest	3751049	-21	kworker/u8:0+events_unbound	07:57:15	0
3704921	99	33	30,2	cyclictest	3715212	-21	kworker/u8:0+events_unbound	07:30:24	0
3704921	99	33	29,3	cyclictest	3817623	-21	kworker/u8:0+events_unbound	09:10:01	0
3704921	99	33	29,3	cyclictest	3817623	-21	kworker/u8:0+events_unbound	09:10:01	0
3704921	99	32	29,2	cyclictest	644494	-21	kworker/u8:4+events_unbound	07:39:12	0
3704921	99	32	29,2	cyclictest	3766522	-21	kworker/u8:1+events_unbound	09:02:14	0
3704921	99	31	28,2	cyclictest	644494	-21	kworker/u8:4+events_unbound	08:13:22	0
3704921	99	31	27,3	cyclictest	3839459	-21	kworker/u8:0+events_unbound	09:23:33	0
3704921	99	31	27,3	cyclictest	3834098	-21	kworker/u8:2+events_unbound	10:00:15	0
3704925	99	30	27,2	cyclictest	3963983	-21	kworker/u8:2+flush-259:0	11:55:00	1
3704925	99	30	27,2	cyclictest	3735811	-21	kworker/u8:2+flush-259:0	07:50:01	1
3704929	99	28	15,11	cyclictest	3828542	-21	latency_hist	09:10:00	2
3704925	99	28	24,3	cyclictest	4031692	-21	gpgv	12:25:01	1
3704921	99	28	24,3	cyclictest	509	-21	rs:main		0
3704921	99	28	23,4	cyclictest	3931855	-21	ntpq	10:45:18	0
3704921	99	28	21,5	cyclictest	3725492	-21	latency_hist	07:30:01	0
3704931	99	27	23,3	cyclictest	3875749	-21	kworker/u8:3+flush-259:0	09:55:18	3
3704929	99	27	22,4	cyclictest	3984607	-21	kworker/u8:3+flush-259:0	12:15:01	2
3704929	99	27	18,8	cyclictest	3982120	-21	kthreadcore	11:35:15	2
3704925	99	27	24,2	cyclictest	644494	-21	kworker/u8:4+flush-259:0	07:50:16	1
3704925	99	27	24,2	cyclictest	3834098	-21	kworker/u8:2+events_unbound	09:17:14	1
3704925	99	27	24,2	cyclictest	3756401	-21	kworker/u8:2+events_unbound	08:08:14	1
3704925	99	27	24,2	cyclictest	3715212	-21	kworker/u8:0+flush-259:0	07:40:01	1
3704921	99	27	24,2	cyclictest	644494	-21	kworker/u8:4+events_unbound	08:33:26	0
3704931	99	26	23,2	cyclictest	4036620	-21	kworker/u8:4+events_unbound	12:40:01	3
3704931	99	26	23,2	cyclictest	4031155	-21	gpgv	12:25:00	3
3704931	99	26	20,4	cyclictest	335557	-21	systemd-journal	07:51:13	3
3704929	99	26	21,4	cyclictest	3984607	-21	kworker/u8:3+flush-259:0	12:35:00	2
3704925	99	26	23,2	cyclictest	3751049	-21	kworker/u8:0+flush-259:0	08:00:23	1
3704921	99	26	23,2	cyclictest	4015687	-21	kworker/u8:1+events_unbound	12:25:18	0
3704921	99	26	23,2	cyclictest	3984607	-21	kworker/u8:3+events_unbound	11:46:13	0
3704921	99	26	23,2	cyclictest	3938139	-21	kworker/u8:1+events_unbound	11:30:18	0
3704921	99	26	23,2	cyclictest	3766522	-21	kworker/u8:1+events_unbound	08:15:15	0
3704921	99	26	21,2	cyclictest	3896733	-21	kworker/u8:2+events_unbound	10:15:14	0
3704921	99	26	20,4	cyclictest	3907065	-21	latency_hist	10:25:01	0
3704929	99	25	21,3	cyclictest	3766522	-21	kworker/u8:1+flush-259:0	09:00:00	2
3704925	99	25	22,2	cyclictest	3869750	-21	kworker/u8:1+events_unbound	10:30:13	1
3704925	99	25	21,3	cyclictest	3886686	-21	kworker/u8:0+flush-259:0	10:23:44	1
3704925	99	25	20,4	cyclictest	3829061	-21	cat	09:10:01	1
3704925	99	25	20,4	cyclictest	3829061	-21	cat	09:10:01	1
3704921	99	25	22,2	cyclictest	3963983	-21	kworker/u8:2+events_unbound	11:25:16	0
3704921	99	25	22,2	cyclictest	3963983	-21	kworker/u8:2+events_unbound	11:25:15	0
3704921	99	25	22,2	cyclictest	3901592	-21	kworker/u8:4+events_unbound	11:00:13	0
3704931	99	24	20,3	cyclictest	644494	-21	kworker/u8:4+flush-259:0	07:35:00	3
3704931	99	24	20,3	cyclictest	3984607	-21	kworker/u8:3+flush-259:0	11:44:06	3
3704931	99	24	20,3	cyclictest	3984607	-21	kworker/u8:3+events_unbound	12:25:21	3
3704925	99	24	21,2	cyclictest	3901592	-21	kworker/u8:4+flush-259:0	10:25:25	1
3704925	99	24	21,2	cyclictest	3901592	-21	kworker/u8:4+events_unbound	11:01:14	1
3704925	99	24	18,4	cyclictest	3897129	-21	diskstats	10:15:12	1
3704921	99	24	22,2	cyclictest	4000434	-21	kworker/u8:0+events_unbound	12:30:14	0
3704931	99	23	19,3	cyclictest	3869750	-21	kworker/u8:1+flush-259:0	09:50:25	3
3704931	99	23	19,3	cyclictest	3704895	-21	kworker/u8:1+events_unbound	07:16:12	3
3704931	99	23	18,4	cyclictest	3886686	-21	kworker/u8:0+flush-259:0	11:35:00	3
3704931	99	23	18,4	cyclictest	335557	-21	systemd-journal	08:42:12	3
3704931	99	23	17,4	cyclictest	3870152	-21	latency_hist	09:50:02	3
3704929	99	23	2,6	cyclictest	335557	-21	systemd-journal	11:55:00	2
3704929	99	23	18,4	cyclictest	335557	-21	systemd-journal	08:48:14	2
3704929	99	23	17,4	cyclictest	335557	-21	systemd-journal	12:25:00	2
3704925	99	23	20,2	cyclictest	3869750	-21	kworker/u8:1+events_unbound	09:50:02	1
3704925	99	23	20,2	cyclictest	3834098	-21	kworker/u8:2+events_unbound	09:33:36	1
3704925	99	23	19,3	cyclictest	644494	-21	kworker/u8:4+events_unbound	08:20:13	1
3704925	99	23	19,3	cyclictest	644494	-21	kworker/u8:4+events_unbound	07:40:22	1
3704925	99	23	19,3	cyclictest	3766522	-21	kworker/u8:1+events_unbound	08:43:14	1
3704921	99	23	20,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	10:13:41	0
3704931	99	22	16,4	cyclictest	335557	-21	systemd-journal	08:35:00	3
3704929	99	22	10,2	cyclictest	3776532	-21	unixbench_multi	08:15:24	2
3704925	99	22	21,1	cyclictest	3869750	-21	kworker/u8:1+events_unbound	10:35:14	1
3704925	99	22	19,2	cyclictest	3963983	-21	kworker/u8:2+events_unbound	11:43:15	1
3704925	99	22	18,3	cyclictest	3869750	-21	kworker/u8:1+events_unbound	10:14:13	1
3704921	99	22	19,2	cyclictest	3886686	-21	kworker/u8:0+events_unbound	10:05:13	0
3704921	99	22	17,4	cyclictest	3995327	-21	apt-get	11:50:11	0
3704931	99	21	18,2	cyclictest	3807934	-21	kworker/u8:3+events_unbound	08:55:14	3
3704931	99	21	18,2	cyclictest	3766522	-21	kworker/u8:1+flush-259:0	08:23:24	3
3704931	99	21	16,4	cyclictest	3740928	-21	latency_hist	07:45:01	3
3704931	99	21	14,5	cyclictest	335557	-21	systemd-journal	09:10:00	3
3704929	99	21	8,1	cyclictest	0	-21	swapper/2	08:30:15	2
3704929	99	21	17,3	cyclictest	509	-21	rs:main		2
3704925	99	21	18,2	cyclictest	3984607	-21	kworker/u8:3+flush-259:0	12:05:21	1
3704925	99	21	18,2	cyclictest	3938139	-21	kworker/u8:1+flush-259:0	11:35:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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