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 Sat May 02, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3610064	99	54	49,3	cyclictest	252	-21	systemd-journal	00:35:15	3
3610053	99	43	36,5	cyclictest	3822086	-21	latency_hist	22:35:00	0
3610053	99	43	36,5	cyclictest	3822086	-21	latency_hist	22:35:00	0
3610053	99	39	33,4	cyclictest	3888752	-21	ntpq	23:35:21	0
3610056	99	38	33,3	cyclictest	3920536	-21	latency_hist	00:10:01	2
3610056	99	36	29,5	cyclictest	3729333	-21	latency_hist	21:05:01	2
3610054	99	36	29,5	cyclictest	3842965	-21	cat	22:55:00	1
3610053	99	35	29,4	cyclictest	3800520	-21	ntpq	22:10:22	0
3610056	99	34	29,4	cyclictest	3785729	-21	kworker/u8:3+flush-259:0	22:10:17	2
3610053	99	34	28,4	cyclictest	3662298	-21	diskstats	20:00:14	0
3610053	99	33	30,2	cyclictest	3625784	-21	kworker/u8:1+flush-259:0	19:50:23	0
3610053	99	33	27,4	cyclictest	3785122	-21	ntpq	21:55:20	0
3610056	99	32	27,3	cyclictest	3801424	-21	kworker/u8:2+flush-259:0	23:25:17	2
3610056	99	31	24,5	cyclictest	3733599	-21	ntpq	21:05:19	2
3610053	99	31	25,4	cyclictest	252	-21	systemd-journal	00:25:00	0
3610053	99	31	24,5	cyclictest	3686765	-21	ntpq	20:20:21	0
3610053	99	31	24,5	cyclictest	3686765	-21	ntpq	20:20:20	0
3610064	99	30	26,3	cyclictest	3843455	-21	kworker/u8:0+flush-259:0	23:00:27	3
3610056	99	29	25,3	cyclictest	3843455	-21	kworker/u8:0+flush-259:0	23:45:16	2
3610053	99	29	22,5	cyclictest	3946387	-21	latency_hist	00:35:00	0
3610056	99	28	23,4	cyclictest	3682545	-21	kworker/u8:2+flush-259:0	21:55:00	2
3610054	99	28	23,4	cyclictest	3724427	-21	apt-get	21:00:11	1
3610054	99	28	22,4	cyclictest	3656703	-21	latency_hist	19:55:01	1
3610054	99	27	15,3	cyclictest	3832711	-21	apt-get	22:45:10	1
3610053	99	27	24,2	cyclictest	3874203	-21	kworker/u8:3+flush-259:0	23:45:24	0
3610053	99	27	20,5	cyclictest	3874179	-21	latency_hist	23:25:02	0
3610053	99	26	21,3	cyclictest	3843455	-21	kworker/u8:0+flush-259:0	23:10:15	0
3610056	99	25	22,2	cyclictest	3880567	-21	kworker/u8:1+flush-259:0	00:00:00	2
3610053	99	25	22,2	cyclictest	3843455	-21	kworker/u8:0+events_unbound	23:05:22	0
3610053	99	25	20,4	cyclictest	3822343	-21	apt-get	22:35:11	0
3610053	99	25	20,4	cyclictest	3822343	-21	apt-get	22:35:11	0
3610053	99	25	20,4	cyclictest	3801424	-21	kworker/u8:2+events_unbound	23:25:22	0
3610064	99	24	18,4	cyclictest	3791352	-21	kworker/u8:0+flush-259:0	22:25:00	3
3610054	99	24	19,4	cyclictest	252	-21	systemd-journal	20:46:56	1
3610054	99	24	18,5	cyclictest	3874448	-21	apt-get	23:25:12	1
3610054	99	24	18,5	cyclictest	3624888	-21	ntpq	19:20:17	1
3610054	99	24	18,4	cyclictest	3791129	-21	latency_hist	22:05:00	1
3610053	99	24	20,3	cyclictest	3682545	-21	kworker/u8:2+events_unbound	20:55:22	0
3610053	99	24	19,4	cyclictest	3905383	-21	apt-get	23:55:12	0
3610064	99	23	20,2	cyclictest	3791352	-21	kworker/u8:0+events_unbound	22:15:20	3
3610064	99	23	19,3	cyclictest	3641311	-21	kworker/u8:2+flush-259:0	19:50:20	3
3610064	99	23	17,4	cyclictest	3646435	-21	latency_hist	19:45:01	3
3610054	99	23	16,5	cyclictest	3749048	-21	ntpq	21:20:19	1
3610053	99	23	19,3	cyclictest	3682545	-21	kworker/u8:2+events_unbound	21:00:23	0
3610053	99	23	19,2	cyclictest	1	-21	systemd	00:16:16	0
3610053	99	23	15,6	cyclictest	3672195	-21	latency_hist	20:10:01	0
3610064	99	22	20,1	cyclictest	3714070	-21	kworker/u8:3+events_unbound	20:50:20	3
3610064	99	22	18,3	cyclictest	3905139	-21	kworker/u8:2+flush-259:0	00:05:30	3
3610064	99	22	18,3	cyclictest	3765447	-21	kworker/u8:1+flush-259:0	21:45:24	3
3610064	99	22	17,4	cyclictest	3895053	-21	/usr/sbin/munin	23:45:14	3
3610056	99	22	19,2	cyclictest	0	-21	swapper/2	22:55:00	2
3610054	99	22	19,2	cyclictest	2971	-21	cron	20:54:59	1
3610054	99	22	17,3	cyclictest	3925971	-21	apt-get	00:15:13	1
3610054	99	22	16,4	cyclictest	252	-21	systemd-journal	22:25:00	1
3610053	99	22	18,3	cyclictest	3801424	-21	kworker/u8:2+flush-259:0	22:40:16	0
3610053	99	22	17,4	cyclictest	3641311	-21	kworker/u8:2+flush-259:0	19:40:21	0
3610053	99	22	17,4	cyclictest	3604771	-21	kworker/u8:3+events_unbound	19:39:57	0
3610053	99	22	16,5	cyclictest	3770570	-21	latency_hist	21:45:01	0
3610064	99	21	15,4	cyclictest	3873325	-21	ntpq	23:20:21	3
3610064	99	21	15,4	cyclictest	252	-21	systemd-journal	20:20:56	3
3610064	99	21	15,4	cyclictest	252	-21	systemd-journal	20:20:56	3
3610056	99	21	18,2	cyclictest	3682545	-21	kworker/u8:2+flush-259:0	20:40:00	2
3610056	99	21	15,4	cyclictest	3739896	-21	apt-get	21:15:12	2
3610056	99	21	14,5	cyclictest	3889652	-21	latency_hist	23:40:01	2
3610056	99	21	14,5	cyclictest	3857894	-21	ntpq	23:05:20	2
3610054	99	21	15,4	cyclictest	3651571	-21	latency_hist	19:50:00	1
3610053	99	21	17,3	cyclictest	3785729	-21	kworker/u8:3+events_unbound	22:05:14	0
3610053	99	21	15,4	cyclictest	3671874	-21	kworker/u8:3+events_unbound	20:10:20	0
3610053	99	21	13,6	cyclictest	3853551	-21	latency_hist	23:05:01	0
3610064	99	20	15,4	cyclictest	3719241	-21	/usr/sbin/munin	20:55:13	3
3610056	99	20	16,3	cyclictest	3702957	-21	kworker/u8:0+flush-259:0	20:45:17	2
3610056	99	20	14,4	cyclictest	3697127	-21	ntpq	20:30:21	2
3610054	99	20	16,3	cyclictest	3756165	-21	kworker/u8:0+flush-259:0	21:40:20	1
3610054	99	20	14,4	cyclictest	252	-21	systemd-journal	21:47:57	1
3610053	99	20	16,3	cyclictest	3641311	-21	kworker/u8:2+flush-259:0	19:45:30	0
3610053	99	20	16,3	cyclictest	3625784	-21	kworker/u8:1+events_unbound	19:55:14	0
3610053	99	20	16,2	cyclictest	0	-21	swapper/0	21:25:01	0
3610053	99	20	15,4	cyclictest	3682545	-21	kworker/u8:2+flush-259:0	22:00:15	0
3610064	99	19	13,4	cyclictest	252	-21	systemd-journal	22:14:57	3
3610056	99	19	15,3	cyclictest	3946627	-21	kworker/u8:3+flush-259:0	00:35:19	2
3610054	99	19	13,5	cyclictest	3935137	-21	ntpq	00:20:21	1
3610053	99	19	13,4	cyclictest	3827541	-21	kworker/u8:0+events_unbound	22:45:19	0
3610064	99	18	14,3	cyclictest	1027764	-21	kworker/u8:2+events_unbound	19:15:23	3
3610064	99	18	12,4	cyclictest	3641311	-21	kworker/u8:2+events_unbound	20:05:22	3
3610054	99	18	13,4	cyclictest	3946661	-21	apt-get	00:35:10	1
3610053	99	18	15,2	cyclictest	3785729	-21	kworker/u8:3+flush-259:0	22:20:00	0
3610053	99	18	14,3	cyclictest	3671874	-21	kworker/u8:3+flush-259:0	20:25:24	0
3610053	99	18	14,3	cyclictest	3671874	-21	kworker/u8:3+flush-259:0	20:15:21	0
3610053	99	18	13,4	cyclictest	3714070	-21	kworker/u8:3+events_unbound	20:50:22	0
3610053	99	18	12,4	cyclictest	3682545	-21	kworker/u8:2+flush-259:0	21:40:01	0
3610053	99	18	11,5	cyclictest	3614574	-21	ntpq	19:10:21	0
3610064	99	17	14,2	cyclictest	3751244	-21	kthreadcore	21:25:17	3
3610064	99	17	13,3	cyclictest	3682545	-21	kworker/u8:2+events_unbound	21:00:21	3
3610056	99	17	13,3	cyclictest	3756165	-21	kworker/u8:0+events_unbound	21:55:17	2
3610056	99	17	11,5	cyclictest	252	-21	systemd-journal	21:00:01	2
3610053	99	17	9,6	cyclictest	3904199	-21	ntpq	23:50:19	0
3610053	99	17	13,3	cyclictest	3682545	-21	kworker/u8:2+flush-259:0	21:50:22	0
3610053	99	17	13,2	cyclictest	603	50	irq/132-enp0s29f1:rx-0	19:30:21	0
3610053	99	17	12,4	cyclictest	3843006	-21	store	22:55:00	0
3610064	99	16	13,3	cyclictest	3801424	-21	kworker/u8:2+events_unbound	23:05:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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