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 Thu Nov 27, 2025 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3672940	99	42	36,4	cyclictest	2698871	-21	systemd-journal	20:00:00	2
3672939	99	40	37,2	cyclictest	3850117	-21	kworker/u8:2+events_unbound	22:14:55	1
3672937	99	40	34,4	cyclictest	3762549	-21	latency_hist	20:45:01	0
3672942	99	39	36,2	cyclictest	3757020	-21	kworker/u8:3+events_unbound	20:50:17	3
3672937	99	39	32,5	cyclictest	2698871	-21	systemd-journal	23:05:00	0
3672939	99	38	34,3	cyclictest	3912416	-21	kworker/u8:3+events_unbound	00:30:23	1
3672940	99	37	31,4	cyclictest	3750949	-21	latency_hist	20:25:01	2
3672940	99	37	30,5	cyclictest	3709284	-21	latency_hist	19:45:00	2
3672939	99	36	33,2	cyclictest	3871123	-21	kworker/u8:0+events_unbound	22:59:44	1
3672940	99	35	31,3	cyclictest	3871123	-21	kworker/u8:0+flush-259:0	22:40:00	2
3672942	99	34	28,4	cyclictest	3985994	-21	latency_hist	00:20:00	3
3672940	99	34	28,4	cyclictest	3907680	-21	apt-get	23:05:10	2
3672939	99	33	30,2	cyclictest	3861362	-21	kworker/u8:2+flush-259:0	22:30:47	1
3672939	99	33	29,3	cyclictest	3871123	-21	kworker/u8:0+events_unbound	23:04:37	1
3672939	99	32	28,3	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	21:05:34	1
3672939	99	31	28,2	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	21:00:39	1
3672939	99	31	27,3	cyclictest	2698871	-21	systemd-journal	20:55:00	1
3672937	99	31	24,5	cyclictest	3803731	-21	latency_hist	21:25:01	0
3672942	99	30	23,5	cyclictest	3938823	-21	latency_hist	23:35:01	3
3672940	99	30	26,3	cyclictest	3960043	-21	kworker/u8:0+flush-259:0	00:07:59	2
3672940	99	30	24,4	cyclictest	2698871	-21	systemd-journal	20:35:00	2
3672939	99	30	27,2	cyclictest	3912416	-21	kworker/u8:3+events_unbound	23:19:22	1
3672939	99	30	27,2	cyclictest	3876276	-21	kworker/u8:1+events_unbound	23:06:48	1
3672939	99	30	27,2	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	22:15:15	1
3672937	99	30	26,3	cyclictest	3923309	-21	kworker/u8:4+events_unbound	23:25:23	0
3672942	99	29	22,5	cyclictest	2698871	-21	systemd-journal	22:40:00	3
3672939	99	28	25,2	cyclictest	3772483	-21	kworker/u8:1+events_unbound	22:05:08	1
3672939	99	28	24,3	cyclictest	3960043	-21	kworker/u8:0+flush-259:0	00:10:20	1
3672939	99	28	24,3	cyclictest	3871123	-21	kworker/u8:0+flush-259:0	22:50:00	1
3672942	99	27	24,2	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	21:10:24	3
3672942	99	27	20,5	cyclictest	3824302	-21	latency_hist	21:45:00	3
3672940	99	27	22,4	cyclictest	3960043	-21	kworker/u8:0+flush-259:0	00:04:59	2
3672939	99	27	24,2	cyclictest	3944635	-21	kworker/u8:1+events_unbound	23:55:57	1
3672939	99	27	23,3	cyclictest	3861362	-21	kworker/u8:2+flush-259:0	22:26:24	1
3672939	99	27	23,3	cyclictest	3861362	-21	kworker/u8:2+flush-259:0	22:26:24	1
3672939	99	27	23,3	cyclictest	3693859	-21	kworker/u8:0+flush-259:0	19:43:39	1
3672942	99	26	22,3	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	22:00:23	3
3672939	99	26	23,2	cyclictest	3912416	-21	kworker/u8:3+flush-259:0	23:12:17	1
3672939	99	26	23,2	cyclictest	3772483	-21	kworker/u8:1+events_unbound	21:53:37	1
3672939	99	26	23,2	cyclictest	3767747	-21	kworker/u8:0+flush-259:0	21:15:18	1
3672939	99	26	23,2	cyclictest	3750967	-21	kworker/u8:0+events_unbound	20:31:10	1
3672939	99	26	23,2	cyclictest	3625953	-21	kworker/u8:3+flush-259:0	19:55:26	1
3672939	99	26	22,3	cyclictest	3954966	-21	apt-get	23:50:15	1
3672939	99	26	20,4	cyclictest	3746004	-21	/usr/sbin/munin	20:20:13	1
3672937	99	26	22,3	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	22:00:17	0
3672940	99	25	18,5	cyclictest	2698871	-21	systemd-journal	23:40:00	2
3672939	99	25	22,2	cyclictest	3881739	-21	kworker/u8:2+events_unbound	22:44:59	1
3672939	99	25	22,2	cyclictest	3783420	-21	kworker/u8:2+events_unbound	21:35:21	1
3672939	99	25	22,2	cyclictest	3672392	-21	kworker/u8:2+events_unbound	19:29:27	1
3672939	99	25	22,2	cyclictest	3625953	-21	kworker/u8:3+flush-259:0	19:47:29	1
3672939	99	25	22,2	cyclictest	3625953	-21	kworker/u8:3+events_unbound	20:00:36	1
3672939	99	25	21,3	cyclictest	3960043	-21	kworker/u8:0+events_unbound	00:20:34	1
3672939	99	25	21,3	cyclictest	3772483	-21	kworker/u8:1+events_unbound	20:55:20	1
3672937	99	25	22,2	cyclictest	3635204	-21	kworker/u8:1+flush-259:0	19:10:25	0
3672942	99	24	17,5	cyclictest	3688689	-21	latency_hist	19:25:00	3
3672940	99	24	19,3	cyclictest	3798607	-21	sh	21:20:00	2
3672939	99	24	21,2	cyclictest	3814208	-21	kworker/u8:4+flush-259:0	21:55:15	1
3672939	99	24	21,2	cyclictest	3783420	-21	kworker/u8:2+events_unbound	21:13:15	1
3672939	99	24	21,2	cyclictest	3772483	-21	kworker/u8:1+events_unbound	21:29:37	1
3672939	99	24	21,1	cyclictest	0	-21	swapper/1	21:45:00	1
3672939	99	24	20,3	cyclictest	3693859	-21	kworker/u8:0+events_unbound	19:31:38	1
3672937	99	24	19,3	cyclictest	3876276	-21	kworker/u8:1+flush-259:0	23:10:01	0
3672939	99	23	20,2	cyclictest	3912416	-21	kworker/u8:3+events_unbound	00:36:56	1
3672939	99	23	19,3	cyclictest	3772483	-21	kworker/u8:1+events_unbound	22:00:10	1
3672937	99	23	19,3	cyclictest	3871123	-21	kworker/u8:0+flush-259:0	22:50:25	0
3672942	99	22	16,4	cyclictest	3834555	-21	apt-get	21:54:59	3
3672940	99	22	17,3	cyclictest	3891989	-21	cron	22:50:01	2
3672939	99	22	19,2	cyclictest	3960043	-21	kworker/u8:0+events_unbound	00:27:06	1
3672939	99	22	19,2	cyclictest	3960043	-21	kworker/u8:0+events_unbound	00:01:58	1
3672939	99	22	19,2	cyclictest	3672392	-21	kworker/u8:2+events_unbound	19:19:38	1
3672939	99	22	19,2	cyclictest	3625953	-21	kworker/u8:3+flush-259:0	20:15:00	1
3672939	99	22	19,2	cyclictest	3625953	-21	kworker/u8:3+flush-259:0	20:15:00	1
3672937	99	22	19,2	cyclictest	3912416	-21	kworker/u8:3+events_unbound	23:50:18	0
3672937	99	22	18,3	cyclictest	3960043	-21	kworker/u8:0+events_unbound	00:00:20	0
3672937	99	22	18,3	cyclictest	3625953	-21	kworker/u8:3+events_unbound	19:15:20	0
3672937	99	22	16,4	cyclictest	3944532	-21	cp	23:40:01	0
3672940	99	21	18,2	cyclictest	3635204	-21	kworker/u8:1+flush-259:0	19:30:00	2
3672940	99	21	17,3	cyclictest	3960043	-21	kworker/u8:0+flush-259:0	00:14:01	2
3672940	99	21	14,5	cyclictest	2698871	-21	systemd-journal	23:55:01	2
3672939	99	21	18,2	cyclictest	3923309	-21	kworker/u8:4+events_unbound	23:21:34	1
3672939	99	21	18,2	cyclictest	3735700	-21	kworker/u8:1+flush-259:0	20:40:00	1
3672939	99	21	18,2	cyclictest	3693859	-21	kworker/u8:0+events_unbound	19:35:20	1
3672942	99	20	16,3	cyclictest	3944635	-21	kworker/u8:1+flush-259:0	23:55:16	3
3672940	99	20	17,2	cyclictest	3855617	-21	kworker/u8:3+flush-259:0	22:30:00	2
3672940	99	20	17,2	cyclictest	3855617	-21	kworker/u8:3+flush-259:0	22:30:00	2
3672940	99	20	17,2	cyclictest	3772483	-21	kworker/u8:1+events_unbound	22:00:18	2
3672940	99	20	16,3	cyclictest	3772483	-21	kworker/u8:1+flush-259:0	21:05:01	2
3672940	99	20	15,3	cyclictest	2698871	-21	systemd-journal	20:08:19	2
3672939	99	20	17,2	cyclictest	3912416	-21	kworker/u8:3+events_unbound	23:30:23	1
3672939	99	20	17,2	cyclictest	3861362	-21	kworker/u8:2+events_unbound	22:23:41	1
3672939	99	20	16,3	cyclictest	3871123	-21	kworker/u8:0+events_unbound	22:35:09	1
3672939	99	20	16,3	cyclictest	3715077	-21	kworker/u8:2+events_unbound	20:05:22	1
3672937	99	20	18,1	cyclictest	3625953	-21	kworker/u8:3+events_unbound	20:15:17	0
3672937	99	20	16,3	cyclictest	3715077	-21	kworker/u8:2+events_unbound	20:05:00	0
3672937	99	20	15,3	cyclictest	3986226	-21	/usr/sbin/munin	00:20:14	0
3672942	99	19	14,3	cyclictest	3850845	-21	diskstats	22:10:15	3
3672939	99	19	16,2	cyclictest	3735700	-21	kworker/u8:1+flush-259:0	20:40:10	1
3672939	99	19	15,3	cyclictest	3944014	-21	gpgv	23:40:01	1
3672939	99	19	15,3	cyclictest	3892027	-21	kworker/u8:3+flush-259:0	22:50:15	1
3672939	99	19	15,3	cyclictest	3783420	-21	kworker/u8:2+flush-259:0	21:20:23	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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