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 Fri Jun 26, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3678355	99	46	40,4	cyclictest	3907540	-21	latency_hist	22:50:02	3
3678350	99	45	42,2	cyclictest	3829395	-21	kworker/u8:2+flush-259:0	22:40:00	2
3678339	99	38	33,4	cyclictest	3709497	-21	kworker/u8:3+flush-259:0	19:40:21	0
3678339	99	36	29,4	cyclictest	3964716	-21	latency_hist	23:45:01	0
3678339	99	36	29,4	cyclictest	3964716	-21	latency_hist	23:45:00	0
3678355	99	34	28,4	cyclictest	3949656	-21	diskstats	23:30:12	3
3678355	99	33	30,2	cyclictest	3640316	-21	kworker/u8:2+events_unbound	19:10:17	3
3678346	99	33	27,4	cyclictest	3963892	-21	ntpq	23:40:22	1
3678346	99	33	27,4	cyclictest	3963892	-21	ntpq	23:40:21	1
3678346	99	33	27,4	cyclictest	3881724	-21	latency_hist	22:25:01	1
3678339	99	33	27,4	cyclictest	3933308	-21	kworker/u8:1+flush-259:0	23:30:23	0
3678339	99	33	27,4	cyclictest	3793059	-21	cat	21:00:01	0
3678355	99	32	28,3	cyclictest	3683454	-21	kworker/u8:3+events_unbound	19:20:15	3
3678355	99	32	27,4	cyclictest	3995711	-21	kworker/u8:2+flush-259:0	00:30:00	3
3678350	99	32	28,3	cyclictest	3876386	-21	gpgv	22:20:01	2
3678350	99	32	27,3	cyclictest	3756283	-21	base64	20:25:01	2
3678339	99	32	28,2	cyclictest	3980392	-21	kworker/u8:0+flush-259:0	00:00:22	0
3678355	99	31	26,4	cyclictest	3793154	-21	cat	21:00:01	3
3678355	99	31	24,5	cyclictest	335557	-21	systemd-journal	20:30:01	3
3678355	99	31	23,6	cyclictest	3724802	-21	latency_hist	19:55:01	3
3678350	99	31	28,2	cyclictest	3871017	-21	kworker/u8:1+flush-259:0	22:30:00	2
3678350	99	31	25,4	cyclictest	3829374	-21	latency_hist	21:35:00	2
3678355	99	30	26,3	cyclictest	3944276	-21	kworker/u8:2+flush-259:0	23:50:26	3
3678355	99	30	26,2	cyclictest	3709285	-21	kworker/u8:1+flush-259:0	20:20:16	3
3678350	99	30	26,3	cyclictest	335557	-21	systemd-journal	21:55:01	2
3678346	99	30	26,3	cyclictest	3819054	-21	kworker/u8:0+flush-259:0	21:30:01	1
3678346	99	30	26,3	cyclictest	3819054	-21	kworker/u8:0+flush-259:0	21:30:00	1
3678346	99	30	24,4	cyclictest	3912745	-21	latency_hist	22:55:00	1
3678339	99	30	23,5	cyclictest	3938906	-21	latency_hist	23:20:00	0
3678355	99	29	24,4	cyclictest	3845502	-21	apt-get	21:50:11	3
3678355	99	29	24,3	cyclictest	3918517	-21	kworker/u8:3+events_unbound	23:10:20	3
3678350	99	29	25,3	cyclictest	3849365	-21	kworker/u8:1+flush-259:0	22:00:00	2
3678339	99	29	25,3	cyclictest	3635064	-21	kworker/u8:0+flush-259:0	20:15:26	0
3678355	99	28	24,3	cyclictest	3944276	-21	kworker/u8:2+events_unbound	23:55:12	3
3678350	99	28	24,3	cyclictest	3964980	-21	apt-get	23:45:13	2
3678350	99	28	23,3	cyclictest	3683436	-21	latency_hist	19:15:02	2
3678346	99	28	24,3	cyclictest	3635064	-21	kworker/u8:0+events_unbound	19:45:13	1
3678355	99	27	23,3	cyclictest	3918517	-21	kworker/u8:3+events_unbound	23:20:17	3
3678355	99	27	22,3	cyclictest	3918553	-21	sshd	23:00:12	3
3678355	99	27	21,4	cyclictest	4005440	-21	kworker/u8:3+flush-259:0	00:34:04	3
3678346	99	27	23,3	cyclictest	335557	-21	systemd-journal	22:12:56	1
3678355	99	26	22,3	cyclictest	3725029	-21	kworker/u8:4+events_unbound	20:04:12	3
3678355	99	26	22,3	cyclictest	3700141	-21	kworker/u8:2+flush-259:0	19:55:16	3
3678355	99	26	22,3	cyclictest	3683454	-21	kworker/u8:3+flush-259:0	19:30:16	3
3678355	99	26	19,4	cyclictest	3792696	-21	latency_hist	21:00:00	3
3678350	99	26	22,3	cyclictest	3798599	-21	apt-get	21:05:12	2
3678350	99	26	19,5	cyclictest	3974992	-21	latency_hist	23:55:01	2
3678346	99	26	22,3	cyclictest	4005440	-21	kworker/u8:3+events_unbound	00:25:23	1
3678346	99	26	22,3	cyclictest	3975015	-21	kworker/u8:1+flush-259:0	23:55:26	1
3678339	99	26	22,3	cyclictest	3782030	-21	gpgv	20:50:00	0
3678339	99	26	19,5	cyclictest	3850372	-21	latency_hist	21:55:00	0
3678355	99	25	21,3	cyclictest	3683454	-21	kworker/u8:3+flush-259:0	19:25:26	3
3678355	99	25	19,4	cyclictest	3740566	-21	/usr/sbin/munin	20:10:14	3
3678346	99	25	21,3	cyclictest	3995910	-21	/usr/sbin/munin	00:15:21	1
3678346	99	25	21,3	cyclictest	3885907	-21	kworker/u8:0+flush-259:0	23:04:59	1
3678346	99	25	21,3	cyclictest	3704351	-21	apt-get	19:35:12	1
3678346	99	25	20,4	cyclictest	3772083	-21	kworker/u8:1+events_unbound	21:05:01	1
3678339	99	25	21,3	cyclictest	3640316	-21	kworker/u8:2+flush-259:0	19:15:00	0
3678339	99	25	19,4	cyclictest	3839860	-21	cp	21:45:00	0
3678355	99	24	20,3	cyclictest	3886849	-21	kworker/u8:5+flush-259:0	22:35:25	3
3678355	99	24	20,3	cyclictest	3849365	-21	kworker/u8:1+events_unbound	21:59:14	3
3678355	99	24	20,3	cyclictest	3635064	-21	kworker/u8:0+flush-259:0	20:05:16	3
3678355	99	24	19,3	cyclictest	3933308	-21	kworker/u8:1+flush-259:0	23:40:16	3
3678355	99	24	19,3	cyclictest	3933308	-21	kworker/u8:1+flush-259:0	23:40:16	3
3678355	99	24	18,4	cyclictest	3881962	-21	/usr/sbin/munin	22:25:20	3
3678355	99	24	17,5	cyclictest	3750633	-21	latency_hist	20:20:01	3
3678355	99	24	16,6	cyclictest	3803497	-21	latency_hist	21:10:00	3
3678350	99	24	20,3	cyclictest	3829395	-21	kworker/u8:2+events_unbound	22:10:14	2
3678350	99	24	18,4	cyclictest	3944045	-21	latency_hist	23:25:00	2
3678350	99	24	18,4	cyclictest	335557	-21	systemd-journal	20:10:01	2
3678346	99	24	21,2	cyclictest	3860696	-21	kworker/u8:0+flush-259:0	22:10:00	1
3678346	99	24	20,3	cyclictest	3886849	-21	kworker/u8:5+events_unbound	22:45:15	1
3678346	99	24	20,3	cyclictest	3700141	-21	kworker/u8:2+flush-259:0	20:05:26	1
3678346	99	24	19,4	cyclictest	3781997	-21	latency_hist	20:50:01	1
3678346	99	24	19,3	cyclictest	3985397	-21	latency_hist	00:05:01	1
3678346	99	24	18,4	cyclictest	3834508	-21	latency_hist	21:40:01	1
3678346	99	24	0,23	cyclictest	1	-21	systemd	21:55:01	1
3678339	99	24	20,3	cyclictest	3970094	-21	apt-get	23:50:10	0
3678355	99	23	18,3	cyclictest	3885907	-21	kworker/u8:0+flush-259:0	23:35:18	3
3678355	99	23	18,3	cyclictest	3849365	-21	kworker/u8:1+flush-259:0	22:05:20	3
3678350	99	23	20,2	cyclictest	3700141	-21	kworker/u8:2+events_unbound	19:55:18	2
3678350	99	23	19,3	cyclictest	3819054	-21	kworker/u8:0+flush-259:0	21:40:00	2
3678346	99	23	20,2	cyclictest	3829395	-21	kworker/u8:2+events_unbound	21:40:14	1
3678346	99	23	20,2	cyclictest	3700141	-21	kworker/u8:2+events_unbound	19:55:14	1
3678346	99	23	20,2	cyclictest	3635064	-21	kworker/u8:0+events_unbound	19:30:22	1
3678346	99	23	19,3	cyclictest	3886849	-21	kworker/u8:5+flush-259:0	23:34:59	1
3678346	99	23	19,3	cyclictest	3709505	-21	/usr/sbin/munin	19:40:22	1
3678346	99	23	19,3	cyclictest	3640316	-21	kworker/u8:2+events_unbound	19:10:15	1
3678346	99	23	18,3	cyclictest	3808654	-21	latency_hist	21:15:01	1
3678346	99	23	17,4	cyclictest	4005969	-21	latency_hist	00:25:00	1
3678346	99	23	17,4	cyclictest	3927753	-21	ntpq	23:05:22	1
3678339	99	23	19,3	cyclictest	3819054	-21	kworker/u8:0+flush-259:0	21:45:26	0
3678339	99	23	17,4	cyclictest	335557	-21	systemd-journal	20:06:12	0
3678355	99	22	18,3	cyclictest	3808884	-21	kworker/u8:4+events_unbound	21:20:12	3
3678355	99	22	18,3	cyclictest	3750372	-21	kworker/u8:3+events_unbound	20:41:12	3
3678350	99	22	19,2	cyclictest	3886849	-21	kworker/u8:5+events_unbound	22:40:20	2
3678350	99	22	19,2	cyclictest	3700141	-21	kworker/u8:2+events_unbound	20:35:01	2
3678350	99	22	18,3	cyclictest	335557	-21	systemd-journal	22:58:11	2
3678350	99	22	17,4	cyclictest	3635064	-21	kworker/u8:0+flush-259:0	19:22:43	2
3678350	99	22	17,3	cyclictest	3839670	-21	latency_hist	21:45:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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