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 Mon Aug 03, 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
3066715	99	58	53,3	cyclictest	3145178	-21	kworker/u8:3+flush-259:0	08:55:01	0
3066725	99	48	45,2	cyclictest	3093162	-21	kworker/u8:1+events_unbound	08:05:01	3
3066715	99	46	38,5	cyclictest	3098110	-21	latency_hist	07:40:01	0
3066719	99	42	36,4	cyclictest	509	-21	rs:main		1
3066723	99	41	38,2	cyclictest	3218451	-21	kworker/u8:0+events_unbound	10:30:18	2
3066725	99	39	33,4	cyclictest	3374625	-21	gpgv	12:05:01	3
3066719	99	39	32,5	cyclictest	3176498	-21	latency_hist	08:55:01	1
3066725	99	36	33,2	cyclictest	3093162	-21	kworker/u8:1+flush-259:0	08:40:01	3
3066723	99	35	31,3	cyclictest	3197702	-21	kworker/u8:2+flush-259:0	10:15:21	2
3066715	99	35	31,3	cyclictest	3369544	-21	kworker/u8:4+events_unbound	12:05:18	0
3066719	99	33	29,3	cyclictest	3092535	-21	gpgv	07:35:00	1
3066719	99	33	28,3	cyclictest	335557	-21	systemd-journal	11:20:00	1
3066719	99	33	28,3	cyclictest	3119441	-21	apt-get	08:00:12	1
3066719	99	33	27,4	cyclictest	335557	-21	systemd-journal	10:45:21	1
3066725	99	32	29,2	cyclictest	3244572	-21	kworker/u8:4+events_unbound	10:55:23	3
3066723	99	32	28,3	cyclictest	3296146	-21	kworker/u8:0+flush-259:0	11:10:25	2
3066719	99	32	28,3	cyclictest	3093162	-21	kworker/u8:1+flush-259:0	08:50:01	1
3066715	99	32	25,5	cyclictest	3363201	-21	ntpq	11:50:20	0
3066723	99	31	24,5	cyclictest	335557	-21	systemd-journal	09:00:00	2
3066719	99	31	27,3	cyclictest	3234008	-21	kworker/u8:3+flush-259:0	10:00:00	1
3066719	99	31	27,3	cyclictest	3093162	-21	kworker/u8:1+flush-259:0	08:10:00	1
3066719	99	31	26,3	cyclictest	3072119	-21	apt-get	07:15:13	1
3066719	99	31	26,3	cyclictest	3072119	-21	apt-get	07:15:13	1
3066719	99	31	25,4	cyclictest	335557	-21	systemd-journal	12:35:37	1
3066719	99	31	24,5	cyclictest	3368380	-21	ntpq	11:55:20	1
3066715	99	31	28,2	cyclictest	3244572	-21	kworker/u8:4+events_unbound	10:32:59	0
3066715	99	31	26,3	cyclictest	3391145	-21	apt-get	12:20:11	0
3066725	99	30	27,3	cyclictest	3218451	-21	kworker/u8:0+events_unbound	10:29:59	3
3066725	99	30	27,2	cyclictest	3244572	-21	kworker/u8:4+flush-259:0	10:00:59	3
3066723	99	30	23,5	cyclictest	3317407	-21	cp	11:10:01	2
3066719	99	30	24,4	cyclictest	3113151	-21	ntpq	07:50:23	1
3066725	99	29	26,3	cyclictest	3061480	-21	kworker/u8:2+events_unbound	07:16:56	3
3066725	99	29	26,3	cyclictest	3061480	-21	kworker/u8:2+events_unbound	07:16:56	3
3066725	99	29	25,3	cyclictest	3197702	-21	kworker/u8:2+events_unbound	09:53:00	3
3066725	99	29	25,3	cyclictest	3150581	-21	kworker/u8:0+flush-259:0	08:45:01	3
3066725	99	29	24,3	cyclictest	3139821	-21	latency_hist	08:20:01	3
3066723	99	29	25,3	cyclictest	3061480	-21	kworker/u8:2+events_unbound	07:49:43	2
3066723	99	29	23,4	cyclictest	3233075	-21	ntpq	09:45:20	2
3066719	99	29	21,6	cyclictest	335557	-21	systemd-journal	11:34:59	1
3066723	99	28	25,2	cyclictest	3244572	-21	kworker/u8:4+events_unbound	10:05:19	2
3066719	99	28	23,3	cyclictest	3375072	-21	gpgv	12:05:01	1
3066719	99	28	23,3	cyclictest	3124378	-21	kworker/u8:2+flush-259:0	08:14:55	1
3066719	99	28	21,5	cyclictest	3202897	-21	latency_hist	09:20:00	1
3066725	99	27	23,3	cyclictest	3379874	-21	kworker/u8:1+flush-259:0	12:09:59	3
3066719	99	27	21,4	cyclictest	3217538	-21	ntpq	09:30:21	1
3066715	99	27	24,2	cyclictest	3312250	-21	kworker/u8:1+events_unbound	11:30:00	0
3066715	99	27	23,3	cyclictest	3312250	-21	kworker/u8:1+events_unbound	11:10:00	0
3066715	99	27	20,5	cyclictest	335557	-21	systemd-journal	10:53:59	0
3066725	99	26	22,3	cyclictest	3197702	-21	kworker/u8:2+events_unbound	09:59:59	3
3066723	99	26	23,2	cyclictest	3124378	-21	kworker/u8:2+flush-259:0	08:19:56	2
3066723	99	26	22,3	cyclictest	3208096	-21	kworker/u8:5+events_unbound	09:45:00	2
3066723	99	26	22,3	cyclictest	3092511	-21	apt-get	07:35:01	2
3066725	99	25	23,2	cyclictest	3187319	-21	kworker/u8:1+events_unbound	09:19:00	3
3066725	99	25	22,2	cyclictest	3124378	-21	kworker/u8:2+events_unbound	08:13:55	3
3066725	99	25	21,3	cyclictest	3312250	-21	kworker/u8:1+events_unbound	11:49:00	3
3066725	99	25	21,3	cyclictest	3061480	-21	kworker/u8:2+flush-259:0	07:30:56	3
3066719	99	25	20,3	cyclictest	3280888	-21	apt-get	10:35:14	1
3066719	99	25	19,4	cyclictest	3071852	-21	latency_hist	07:15:01	1
3066715	99	25	21,3	cyclictest	3093162	-21	kworker/u8:1+events_unbound	08:21:55	0
3066725	99	24	22,2	cyclictest	3322816	-21	kworker/u8:2+events_unbound	11:19:02	3
3066725	99	24	21,2	cyclictest	3312250	-21	kworker/u8:1+events_unbound	11:33:00	3
3066725	99	24	21,2	cyclictest	3208096	-21	kworker/u8:5+flush-259:0	09:50:00	3
3066725	99	24	20,3	cyclictest	3389861	-21	kworker/u8:3+events_unbound	12:25:27	3
3066725	99	24	20,3	cyclictest	3285837	-21	kworker/u8:1+events_unbound	10:45:59	3
3066719	99	24	18,3	cyclictest	3385498	-21	base64	12:15:01	1
3066725	99	23	20,2	cyclictest	3061480	-21	kworker/u8:2+events_unbound	07:13:54	3
3066725	99	23	19,3	cyclictest	507	-21	in:imuxsock	11:10:00	3
3066725	99	23	19,3	cyclictest	3197702	-21	kworker/u8:2+flush-259:0	10:35:18	3
3066723	99	23	20,2	cyclictest	3322816	-21	kworker/u8:2+events_unbound	11:17:01	2
3066723	99	23	20,2	cyclictest	3150581	-21	kworker/u8:0+events_unbound	08:42:59	2
3066723	99	23	20,2	cyclictest	3124378	-21	kworker/u8:2+events_unbound	08:25:24	2
3066723	99	23	19,3	cyclictest	3312250	-21	kworker/u8:1+events_unbound	11:20:13	2
3066723	99	23	19,3	cyclictest	3244572	-21	kworker/u8:4+events_unbound	10:50:23	2
3066723	99	23	19,3	cyclictest	3050809	-21	kworker/u8:0+events_unbound	07:55:20	2
3066723	99	23	18,4	cyclictest	3338726	-21	diskstats	11:30:13	2
3066719	99	23	18,3	cyclictest	3374514	-21	apt-get	12:04:59	1
3066719	99	23	17,4	cyclictest	3389861	-21	kworker/u8:3+flush-259:0	12:35:00	1
3066719	99	23	17,4	cyclictest	3311600	-21	apt-get	11:05:01	1
3066715	99	23	16,5	cyclictest	335557	-21	systemd-journal	09:38:58	0
3066725	99	22	20,2	cyclictest	3348632	-21	kworker/u8:2+events_unbound	12:31:59	3
3066725	99	22	20,2	cyclictest	3296146	-21	kworker/u8:0+events_unbound	11:22:00	3
3066725	99	22	20,2	cyclictest	3124378	-21	kworker/u8:2+events_unbound	08:30:24	3
3066725	99	22	19,2	cyclictest	3171481	-21	kworker/u8:4+flush-259:0	08:50:16	3
3066725	99	22	19,2	cyclictest	3093162	-21	kworker/u8:1+events_unbound	07:45:21	3
3066725	99	22	17,4	cyclictest	335557	-21	systemd-journal	08:25:01	3
3066723	99	22	19,2	cyclictest	3389861	-21	kworker/u8:3+flush-259:0	12:35:25	2
3066723	99	22	18,3	cyclictest	3197702	-21	kworker/u8:2+events_unbound	09:58:00	2
3066723	99	22	18,3	cyclictest	3061480	-21	kworker/u8:2+flush-259:0	07:10:21	2
3066719	99	22	19,2	cyclictest	3171481	-21	kworker/u8:4+events_unbound	09:35:18	1
3066719	99	22	17,3	cyclictest	3358951	-21	latency_hist	11:50:00	1
3066719	99	22	16,4	cyclictest	3312209	-21	cat	11:05:01	1
3066719	99	22	15,5	cyclictest	3139927	-21	cp	08:20:01	1
3066715	99	22	19,2	cyclictest	3244572	-21	kworker/u8:4+events_unbound	11:00:24	0
3066715	99	22	17,3	cyclictest	335557	-21	systemd-journal	10:50:00	0
3066725	99	21	17,3	cyclictest	3150581	-21	kworker/u8:0+events_unbound	09:09:59	3
3066723	99	21	18,2	cyclictest	3171481	-21	kworker/u8:4+events_unbound	09:35:22	2
3066723	99	21	17,3	cyclictest	3187319	-21	kworker/u8:1+flush-259:0	09:10:25	2
3066723	99	21	16,4	cyclictest	3076997	-21	latency_hist	07:20:01	2
3066723	99	21	16,4	cyclictest	3076997	-21	latency_hist	07:20:01	2
3066719	99	21	15,4	cyclictest	3114216	-21	/usr/sbin/munin	07:55:25	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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