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 Wed Jul 08, 2026 12:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3445727	2	363	0,2	sleep3	75	-21	kworker/3:1+events	08:10:15	3
3381605	99	212	192,18	cyclictest	3578091	-21	apt-key	10:25:02	0
3381611	99	189	184,3	cyclictest	0	-21	swapper/2	10:25:01	2
3699776	2	153	0,2	sleep3	47	1	rcuc/3	12:25:15	3
3381609	99	128	124,3	cyclictest	0	-21	swapper/1	10:25:01	1
3438147	2	75	0,2	chrt	75	-21	kworker/3:1+events	08:05:00	3
3611874	2	62	0,2	sleep2	39	-21	ksoftirqd/2	10:55:15	2
3381609	99	61	54,5	cyclictest	3482789	-21	kworker/u8:3+events_unbound	10:05:24	1
3381609	99	60	55,4	cyclictest	2014292	-21	kworker/u8:1+events_unbound	07:15:03	1
3381609	99	60	55,4	cyclictest	2014292	-21	kworker/u8:1+events_unbound	07:15:03	1
3681821	2	59	0,3	sleep3	75	-21	kworker/3:1-events	12:05:23	3
3381609	99	59	54,4	cyclictest	3482789	-21	kworker/u8:3+events_unbound	10:00:01	1
3381609	99	57	52,4	cyclictest	3557816	-21	kworker/u8:1+events_unbound	10:30:24	1
3381609	99	55	49,4	cyclictest	2014292	-21	kworker/u8:1+events_unbound	07:45:22	1
3381609	99	55	46,7	cyclictest	1704890	-21	systemd-journal	09:54:59	1
3381609	99	55	46,6	cyclictest	3447933	-21	latency_hist	08:15:00	1
3581763	2	54	0,6	sleep3	45	1	irq_work/3	10:25:15	3
3381609	99	54	45,6	cyclictest	3413199	-21	latency_hist	07:40:01	1
3381609	99	53	48,4	cyclictest	3233151	-21	kworker/u8:2+events_unbound	08:40:20	1
3381609	99	53	45,6	cyclictest	3567366	-21	kworker/u8:2+flush-8:0	10:45:20	1
3381605	99	53	35,15	cyclictest	1704890	-21	systemd-journal	11:53:06	0
3619404	2	51	0,4	chrt	0	-21	swapper/0	11:05:13	0
3381609	99	51	46,4	cyclictest	3587497	-21	kworker/u8:0+events_unbound	11:30:08	1
3381609	99	51	44,5	cyclictest	2014292	-21	kworker/u8:1+events_unbound	07:30:23	1
3381609	99	51	43,6	cyclictest	3462535	-21	kworker/u8:0+flush-8:0	08:35:16	1
3381609	99	50	44,4	cyclictest	3587497	-21	kworker/u8:0+events_unbound	12:30:08	1
3381609	99	50	44,4	cyclictest	3482789	-21	kworker/u8:3+flush-8:0	10:35:21	1
3381609	99	50	44,4	cyclictest	3233151	-21	kworker/u8:2+flush-8:0	07:10:32	1
3381609	99	50	44,4	cyclictest	3233151	-21	kworker/u8:2+flush-8:0	07:10:31	1
3381609	99	50	43,5	cyclictest	3656761	-21	kworker/u8:3+events_unbound	12:05:21	1
3381609	99	50	41,7	cyclictest	1704890	-21	systemd-journal	09:15:06	1
3381609	99	49	44,4	cyclictest	3482789	-21	kworker/u8:3+events_unbound	08:55:20	1
3381609	99	49	42,5	cyclictest	3617549	-21	kworker/u8:2+flush-8:0	11:35:19	1
3381609	99	49	41,6	cyclictest	3422777	-21	kworker/u8:0+flush-8:0	07:50:11	1
3381609	99	49	37,8	cyclictest	1704890	-21	systemd-journal	11:41:06	1
3381609	99	48	37,9	cyclictest	1704890	-21	systemd-journal	10:20:00	1
3381605	99	48	10,33	cyclictest	3453191	-21	kworker/0:2+events	08:40:06	0
3381609	99	47	41,4	cyclictest	3642835	-21	kworker/u8:1+events_unbound	11:50:08	1
3381609	99	47	38,7	cyclictest	3587497	-21	kworker/u8:0+events_unbound	12:10:23	1
3381605	99	47	31,14	cyclictest	1704890	-21	systemd-journal	07:43:09	0
3381609	99	46	42,2	cyclictest	3233151	-21	kworker/u8:2+events_unbound	08:50:24	1
3381609	99	46	40,5	cyclictest	3587497	-21	kworker/u8:0+events_unbound	11:00:26	1
3381609	99	46	40,5	cyclictest	3587497	-21	kworker/u8:0+events_unbound	11:00:26	1
3381609	99	46	40,4	cyclictest	3513380	-21	kworker/u8:1+events_unbound	09:30:24	1
3381605	99	46	1,42	cyclictest	1	-21	systemd	11:35:01	0
3381609	99	45	39,5	cyclictest	3587497	-21	kworker/u8:0+flush-8:0	12:20:10	1
3381609	99	45	38,5	cyclictest	3482789	-21	kworker/u8:3+flush-8:0	09:45:37	1
3381605	99	45	1,27	cyclictest	3527205	-21	ntp_states	09:30:21	0
3381609	99	44	39,3	cyclictest	3587497	-21	kworker/u8:0+events_unbound	11:20:01	1
3381609	99	44	38,4	cyclictest	3642835	-21	kworker/u8:1+events_unbound	12:35:24	1
3381605	99	44	30,12	cyclictest	3428411	-21	aten2_r5power_p	07:55:08	0
3381609	99	43	38,4	cyclictest	3482789	-21	kworker/u8:3+events_unbound	10:00:23	1
3381609	99	43	38,3	cyclictest	3617549	-21	kworker/u8:2+events_unbound	11:25:08	1
3381609	99	43	37,4	cyclictest	3642835	-21	kworker/u8:1+flush-8:0	12:25:25	1
3381609	99	42	34,5	cyclictest	1704890	-21	systemd-journal	09:39:59	1
3381605	99	42	37,4	cyclictest	3233151	-21	kworker/u8:2+events_unbound	09:35:14	0
3381605	99	42	25,15	cyclictest	3503021	-21	systemd-run	09:10:01	0
3560390	2	41	0,5	sleep2	0	-21	swapper/2	10:05:15	2
3483268	2	40	0,3	sleep0	0	-21	swapper/0	08:50:00	0
3381611	99	40	30,7	cyclictest	1704890	-21	systemd-journal	07:20:00	2
3381611	99	40	30,7	cyclictest	1704890	-21	systemd-journal	07:19:59	2
3381611	99	40	10,14	cyclictest	3523367	-21	apt-get	09:30:08	2
3381609	99	40	35,4	cyclictest	3482789	-21	kworker/u8:3+flush-8:0	09:00:22	1
3381609	99	40	35,3	cyclictest	3482789	-21	kworker/u8:3+flush-8:0	09:05:26	1
3381605	99	40	2,32	cyclictest	3381608	-21	latency_hist	07:10:02	0
3381605	99	40	2,32	cyclictest	3381608	-21	latency_hist	07:10:02	0
3381069	2	40	4,10	sleep1	0	-21	swapper/1	07:07:49	1
3381069	2	40	4,10	sleep1	0	-21	swapper/1	07:07:49	1
3381609	99	39	35,3	cyclictest	2014292	-21	kworker/u8:1+flush-8:0	08:30:18	1
3381609	99	39	34,4	cyclictest	2014292	-21	kworker/u8:1+events_unbound	07:25:24	1
3381609	99	39	33,5	cyclictest	3233151	-21	kworker/u8:2+events_unbound	09:10:22	1
3381609	99	39	33,4	cyclictest	2014292	-21	kworker/u8:1+flush-8:0	08:05:21	1
3381609	99	39	31,6	cyclictest	3482789	-21	kworker/u8:3+events_unbound	09:40:25	1
3381605	99	39	29,8	cyclictest	3407240	-21	ntpq	07:30:20	0
3381605	99	39	23,14	cyclictest	3603200	-21	latency_hist	10:50:01	0
3381605	99	39	22,14	cyclictest	0	-21	swapper/0	11:40:17	0
3381609	99	38	33,4	cyclictest	3622593	-21	kworker/u8:3+events_unbound	11:20:19	1
3381609	99	38	33,4	cyclictest	3233151	-21	kworker/u8:2+events_unbound	07:20:19	1
3381609	99	38	32,4	cyclictest	3587497	-21	kworker/u8:0+flush-8:0	11:45:21	1
3381605	99	38	0,25	cyclictest	589	-21	runrttasks	10:44:50	0
3381611	99	37	20,12	cyclictest	3563000	-21	apt-get	10:10:07	2
3381609	99	37	32,3	cyclictest	3642835	-21	kworker/u8:1+flush-8:0	11:55:15	1
3381609	99	37	32,3	cyclictest	3513380	-21	kworker/u8:1+events_unbound	09:20:19	1
3381609	99	37	31,4	cyclictest	3567366	-21	kworker/u8:2+flush-8:0	10:20:08	1
3381605	99	37	20,15	cyclictest	3460760	-21	kthreadcore	08:25:14	0
3381605	99	37	20,13	cyclictest	3543899	-21	tr	09:50:14	0
3381605	99	37	17,18	cyclictest	3472549	-21	unixbench_multi	08:35:24	0
3381605	99	37	1,25	cyclictest	3447042	-21	ntpq	08:10:19	0
3381605	99	37	0,25	cyclictest	3627555	-21	runrttasks	11:11:21	0
3381605	99	37	0,23	cyclictest	589	-21	runrttasks	09:48:59	0
3381605	99	37	0,23	cyclictest	3588224	-21	tr	10:35:06	0
3381611	99	36	9,11	cyclictest	3487167	-21	ntpq	08:50:19	2
3381611	99	36	20,10	cyclictest	3623124	-21	apt-get	11:10:07	2
3381609	99	36	31,4	cyclictest	3557816	-21	kworker/u8:1+events_unbound	10:10:22	1
3381609	99	36	30,5	cyclictest	3587497	-21	kworker/u8:0+flush-8:0	11:05:18	1
3381609	99	36	27,7	cyclictest	3452176	-21	ntpq	08:15:19	1
3381605	99	36	27,6	cyclictest	3458111	-21	latency_hist	08:25:01	0
3381605	99	36	2,22	cyclictest	0	-21	swapper/0	12:32:09	0
3381605	99	36	15,18	cyclictest	3562762	-21	true	10:09:59	0
3381605	99	36	0,25	cyclictest	3556884	2	collect2	10:00:19	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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