OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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
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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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sat Aug 15, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3715993	2	80	0,2	sleep3	48	1	ktimers/3	11:02:51	3
3480689	99	69	63,4	cyclictest	3571141	-21	kworker/u8:2+events_unbound	09:20:01	0
3480689	99	65	46,11	cyclictest	3645165	-21	kworker/u8:0+flush-8:0	09:57:47	0
3480694	99	59	50,6	cyclictest	275	-21	systemd-journal	10:02:58	1
3743782	2	56	0,2	sleep3	48	1	ktimers/3	11:32:48	3
3480689	99	55	48,5	cyclictest	3696734	-21	kworker/u8:1+events_unbound	12:37:57	0
3480689	99	54	49,4	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	07:42:55	0
3480694	99	52	46,4	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	07:20:00	1
3480689	99	52	45,4	cyclictest	3696734	-21	kworker/u8:1+flush-8:0	10:50:01	0
3480689	99	52	45,4	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	08:35:01	0
3480689	99	51	42,6	cyclictest	3742171	-21	kworker/u8:2+events_unbound	11:35:01	0
3480689	99	51	42,6	cyclictest	3742171	-21	kworker/u8:2+events_unbound	11:35:01	0
3808719	2	50	0,3	sleep3	575	-21	kworker/3:2+events	12:37:49	3
3480694	99	50	44,4	cyclictest	3631930	-21	latency_hist	09:40:02	1
3480694	99	49	43,4	cyclictest	3712030	-21	latency_hist	11:00:01	1
3480689	99	49	44,4	cyclictest	3676758	-21	kworker/u8:0+flush-8:0	10:25:01	0
3480694	99	48	44,3	cyclictest	3676758	-21	kworker/u8:0+events_unbound	10:42:44	1
3480689	99	48	43,3	cyclictest	3681685	-21	kworker/u8:2+events_unbound	10:32:59	0
3480689	99	48	42,4	cyclictest	3581476	-21	kworker/u8:0+flush-8:0	09:32:57	0
3480689	99	48	41,5	cyclictest	3681685	-21	kworker/u8:2+flush-8:0	10:38:00	0
3480689	99	48	40,6	cyclictest	3697007	-21	base64	10:45:00	0
3480689	99	47	37,8	cyclictest	3741158	-21	ntpq	11:27:52	0
3480689	99	46	40,4	cyclictest	2680058	-21	kworker/u8:4+flush-8:0	07:12:44	0
3480698	99	45	38,5	cyclictest	3571751	-21	apt-get	08:40:00	2
3480694	99	45	38,5	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	07:57:46	1
3480694	99	45	36,7	cyclictest	3611411	-21	ntpq	09:17:55	1
3480689	99	45	40,4	cyclictest	3681685	-21	kworker/u8:2+flush-8:0	11:02:59	0
3480694	99	44	36,6	cyclictest	3571141	-21	kworker/u8:2+flush-8:0	09:07:44	1
3480689	99	44	39,4	cyclictest	3696734	-21	kworker/u8:1+flush-8:0	11:25:00	0
3480689	99	44	38,3	cyclictest	3571141	-21	kworker/u8:2+events_unbound	08:45:00	0
3480689	99	44	37,5	cyclictest	3731599	-21	kworker/u8:0+events_unbound	11:20:00	0
3480694	99	43	35,5	cyclictest	3796848	-21	latency_hist	12:25:01	1
3480689	99	43	38,3	cyclictest	3742171	-21	kworker/u8:2+flush-8:0	12:05:36	0
3480689	99	43	36,5	cyclictest	3652139	-21	kworker/u8:3+flush-8:0	10:28:00	0
3480689	99	43	2,37	cyclictest	3746958	-21	munin-run	11:35:00	0
3480689	99	42	37,4	cyclictest	3581476	-21	kworker/u8:0+events_unbound	09:02:57	0
3480689	99	42	35,5	cyclictest	3239059	-21	kworker/u8:0+events_unbound	08:12:56	0
3480694	99	41	35,4	cyclictest	3766558	-21	kworker/u8:3+events_unbound	12:37:45	1
3480694	99	41	32,6	cyclictest	275	-21	systemd-journal	11:35:58	1
3480694	99	41	32,6	cyclictest	275	-21	systemd-journal	11:35:58	1
3480689	99	41	37,3	cyclictest	3702534	-21	kworker/u8:0+flush-8:0	10:52:59	0
3480694	99	40	34,4	cyclictest	3696734	-21	kworker/u8:1+events_unbound	11:32:58	1
3480694	99	40	34,4	cyclictest	3517795	-21	apt-get	07:47:39	1
3480689	99	40	34,4	cyclictest	3601967	-21	apt-get	09:10:02	0
3480689	99	40	32,6	cyclictest	3571141	-21	kworker/u8:2+flush-8:0	10:07:58	0
3480689	99	40	31,7	cyclictest	3726055	-21	ntpq	11:12:53	0
3480689	99	40	28,4	cyclictest	3239059	-21	kworker/u8:0+events_unbound	07:32:55	0
3480694	99	39	32,5	cyclictest	275	-21	systemd-journal	08:26:57	1
3480694	99	39	29,7	cyclictest	3596985	-21	latency_hist	09:05:01	1
3480694	99	39	29,7	cyclictest	275	-21	systemd-journal	11:09:58	1
3480689	99	39	34,3	cyclictest	3645165	-21	kworker/u8:0+flush-8:0	09:52:55	0
3480689	99	39	33,4	cyclictest	3239059	-21	kworker/u8:0+events_unbound	07:37:54	0
3480689	99	39	32,5	cyclictest	3475509	-21	kworker/u8:2+flush-8:0	07:48:00	0
3639494	2	38	0,2	sleep3	47	1	rcuc/3	09:47:51	3
3480698	99	38	32,4	cyclictest	3681855	-21	gpgv	10:30:00	2
3480689	99	38	34,3	cyclictest	3475509	-21	kworker/u8:2+flush-8:0	07:52:49	0
3480689	99	38	34,3	cyclictest	3475509	-21	kworker/u8:2+flush-8:0	07:52:49	0
3480689	99	38	33,3	cyclictest	3532335	-21	latency_hist	08:00:00	0
3480689	99	38	32,4	cyclictest	3571141	-21	kworker/u8:2+flush-8:0	09:47:56	0
3480698	99	37	33,3	cyclictest	3571141	-21	kworker/u8:2+events_unbound	09:52:50	2
3480698	99	37	31,4	cyclictest	3661565	-21	journal-offline	10:08:01	2
3480694	99	37	30,5	cyclictest	3583304	-21	journal-offline	08:52:48	1
3480694	99	37	29,6	cyclictest	3502725	-21	kworker/u8:1+flush-8:0	08:02:45	1
3480694	99	37	28,7	cyclictest	3757432	-21	/usr/sbin/munin	11:47:59	1
3480689	99	37	32,4	cyclictest	3702534	-21	kworker/u8:0+events_unbound	10:57:48	0
3480689	99	37	32,4	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	08:23:04	0
3480689	99	37	29,6	cyclictest	3757270	-21	kworker/u8:0+flush-8:0	11:47:42	0
3480689	99	37	26,8	cyclictest	3656891	-21	latency_hist	10:05:01	0
3480698	99	36	31,4	cyclictest	3736786	-21	systemd-run	11:25:00	2
3480694	99	36	24,10	cyclictest	3681830	-21	apt-get	10:30:00	1
3480689	99	36	31,4	cyclictest	3502725	-21	kworker/u8:1+flush-8:0	09:20:29	0
3480689	99	36	30,5	cyclictest	3801626	-21	kworker/u8:0+flush-8:0	12:32:53	0
3480698	99	35	30,4	cyclictest	3571141	-21	kworker/u8:2+flush-8:0	08:47:56	2
3480698	99	35	27,6	cyclictest	3546984	-21	turbostat.cron	08:15:00	2
3480694	99	35	29,4	cyclictest	3766558	-21	kworker/u8:3+flush-8:0	11:58:00	1
3480694	99	35	28,5	cyclictest	3712489	-21	apt-get	11:02:39	1
3480694	99	35	27,6	cyclictest	3737440	-21	apt-get	11:27:40	1
3475841	2	35	23,6	sleep1	0	-21	swapper/1	07:06:43	1
3480694	99	34	28,4	cyclictest	3696734	-21	kworker/u8:1+events_unbound	11:52:59	1
3480694	99	34	28,4	cyclictest	3581476	-21	kworker/u8:0+flush-8:0	09:35:00	1
3480694	99	34	26,6	cyclictest	3616395	-21	ntpq	09:22:53	1
3480694	99	34	26,6	cyclictest	3507391	-21	latency_hist	07:35:01	1
3480694	99	34	26,5	cyclictest	275	-21	systemd-journal	10:13:03	1
3480689	99	34	29,4	cyclictest	3475509	-21	kworker/u8:2+events_unbound	07:20:56	0
3480689	99	34	25,7	cyclictest	275	-21	systemd-journal	08:27:42	0
3475755	2	34	4,10	sleep2	0	-21	swapper/2	07:05:35	2
3480694	99	33	26,5	cyclictest	3502725	-21	kworker/u8:1+flush-8:0	09:12:44	1
3480694	99	33	26,5	cyclictest	3475509	-21	kworker/u8:2+events_unbound	07:42:57	1
3480694	99	33	25,6	cyclictest	3687054	-21	latency_hist	10:35:01	1
3480689	99	33	29,3	cyclictest	3696734	-21	kworker/u8:1+flush-8:0	11:42:45	0
3480689	99	33	29,3	cyclictest	3541868	-21	kworker/u8:3+events_unbound	08:17:43	0
3480689	99	33	28,3	cyclictest	2680058	-21	kworker/u8:4+flush-8:0	07:18:00	0
3480689	99	33	27,4	cyclictest	3571141	-21	kworker/u8:2+flush-8:0	10:17:59	0
3480689	99	33	26,5	cyclictest	3239059	-21	kworker/u8:0+flush-8:0	07:27:51	0
3480689	99	33	25,6	cyclictest	3766558	-21	kworker/u8:3+flush-8:0	12:02:54	0
3480698	99	32	26,4	cyclictest	3537767	-21	cpuspeed_turbos	08:07:44	2
3480698	99	32	23,7	cyclictest	3757747	-21	fschecks_count	11:47:45	2
3480689	99	32	27,4	cyclictest	3696734	-21	kworker/u8:1+events_unbound	12:18:01	0
3480689	99	32	25,5	cyclictest	3581476	-21	kworker/u8:0+flush-8:0	08:52:41	0
3480694	99	31	26,3	cyclictest	3562566	-21	cpuspeed_turbos	08:32:43	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17