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
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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sun Nov 23, 2025 12:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3420303	99	67	62,4	cyclictest	3651069	-21	kworker/u8:2+flush-8:0	11:16:30	0
3420304	99	61	53,6	cyclictest	3446857	-21	kworker/u8:0+flush-8:0	07:51:24	1
3420304	99	60	53,5	cyclictest	3531819	-21	kworker/u8:0+flush-8:0	09:31:23	1
3420304	99	60	53,5	cyclictest	3531819	-21	kworker/u8:0+flush-8:0	09:31:23	1
3420304	99	60	53,5	cyclictest	3531819	-21	kworker/u8:0+events_unbound	09:16:22	1
3420304	99	59	54,3	cyclictest	3415281	-21	kworker/u8:1+events_unbound	08:01:11	1
3420304	99	59	52,5	cyclictest	3512025	-21	kworker/u8:3+events_unbound	08:56:42	1
3420304	99	59	52,5	cyclictest	3467458	-21	kworker/u8:2+events_unbound	08:11:24	1
3420309	99	58	53,4	cyclictest	3531819	-21	kworker/u8:0+events_unbound	09:26:32	2
3420304	99	56	50,4	cyclictest	3512025	-21	kworker/u8:3+events_unbound	10:21:32	1
3420304	99	56	49,5	cyclictest	3512025	-21	kworker/u8:3+events_unbound	09:01:23	1
3420303	99	55	44,9	cyclictest	3507420	-21	diskstats	08:36:14	0
3420304	99	54	45,6	cyclictest	3699633	-21	ntpq	11:46:23	1
3420303	99	54	46,6	cyclictest	3675600	-21	latency_hist	11:25:01	0
3420304	99	53	46,5	cyclictest	3512025	-21	kworker/u8:3+events_unbound	08:41:25	1
3420304	99	53	45,6	cyclictest	3492245	-21	kworker/u8:0+flush-8:0	08:21:26	1
3420304	99	53	44,7	cyclictest	3580490	-21	ntpq	09:46:26	1
3420304	99	53	43,8	cyclictest	3451214	-21	ntpq	07:36:21	1
3420309	99	52	48,3	cyclictest	3566220	-21	kworker/u8:2+events_unbound	10:36:28	2
3420309	99	52	47,4	cyclictest	3512025	-21	kworker/u8:3+events_unbound	08:46:26	2
3420304	99	52	48,3	cyclictest	3512025	-21	kworker/u8:3+flush-8:0	10:51:30	1
3420304	99	52	44,6	cyclictest	3467458	-21	kworker/u8:2+flush-8:0	08:06:24	1
3420304	99	52	44,5	cyclictest	3566220	-21	kworker/u8:2+flush-8:0	09:41:24	1
3420304	99	52	43,6	cyclictest	3665712	-21	kworker/u8:0+flush-8:0	11:41:24	1
3420303	99	52	44,7	cyclictest	3512025	-21	kworker/u8:3+flush-8:0	08:56:41	0
3420309	99	51	47,3	cyclictest	3704852	-21	kworker/u8:3+events_unbound	11:51:30	2
3420309	99	51	46,4	cyclictest	3651069	-21	kworker/u8:2+flush-8:0	11:41:29	2
3420309	99	51	46,4	cyclictest	3415281	-21	kworker/u8:1+flush-8:0	07:31:45	2
3420303	99	51	44,5	cyclictest	3710610	-21	latency_hist	12:00:01	0
3420304	99	50	44,4	cyclictest	3715597	-21	kworker/u8:0+events_unbound	12:11:26	1
3420304	99	50	44,4	cyclictest	3665712	-21	kworker/u8:0+events_unbound	11:21:14	1
3420304	99	50	44,4	cyclictest	3590399	-21	kworker/u8:0+events_unbound	10:26:25	1
3420304	99	50	44,4	cyclictest	3427561	-21	kworker/u8:3+events_unbound	08:16:28	1
3420304	99	50	43,5	cyclictest	3512025	-21	kworker/u8:3+flush-8:0	09:11:22	1
3420309	99	49	45,3	cyclictest	3566220	-21	kworker/u8:2+events_unbound	10:01:29	2
3420304	99	49	42,5	cyclictest	3566220	-21	kworker/u8:2+flush-8:0	09:51:29	1
3420304	99	48	43,4	cyclictest	3590399	-21	kworker/u8:0+events_unbound	10:31:26	1
3420304	99	48	43,4	cyclictest	3492245	-21	kworker/u8:0+events_unbound	08:26:23	1
3420304	99	48	43,4	cyclictest	3492245	-21	kworker/u8:0+events_unbound	08:26:22	1
3420304	99	48	42,4	cyclictest	3704852	-21	kworker/u8:3+flush-8:0	12:31:26	1
3420304	99	48	42,4	cyclictest	3512025	-21	kworker/u8:3+flush-8:0	09:21:24	1
3420304	99	48	39,6	cyclictest	3655043	-21	ntpq	11:01:28	1
3420304	99	48	39,6	cyclictest	3415281	-21	kworker/u8:1+flush-8:0	07:21:22	1
3420304	99	47	43,3	cyclictest	3512025	-21	kworker/u8:3+events_unbound	09:56:28	1
3420304	99	47	42,4	cyclictest	3651069	-21	kworker/u8:2+flush-8:0	11:31:17	1
3420304	99	47	42,4	cyclictest	3600327	-21	ntpq	10:06:25	1
3420304	99	47	40,5	cyclictest	3651069	-21	kworker/u8:2+flush-8:0	11:16:24	1
3420304	99	47	39,5	cyclictest	3467458	-21	kworker/u8:2+events_unbound	08:51:26	1
3420304	99	47	38,6	cyclictest	3570605	-21	ntpq	09:36:23	1
3420304	99	47	38,6	cyclictest	3570605	-21	ntpq	09:36:23	1
3420303	99	47	38,6	cyclictest	3437266	-21	latency_hist	07:25:01	0
3582131	2	46	0,2	sleep3	586	-21	kworker/3:2-events	09:51:21	3
3420304	99	46	39,5	cyclictest	3446857	-21	kworker/u8:0+flush-8:0	07:41:30	1
3420304	99	46	35,9	cyclictest	3689571	-21	ntpq	11:36:25	1
3420303	99	46	37,7	cyclictest	3420515	-21	/usr/sbin/munin	07:11:27	0
3420309	99	45	41,3	cyclictest	3645014	-21	kworker/u8:0+events_unbound	10:51:26	2
3420304	99	45	39,4	cyclictest	3531819	-21	kworker/u8:0+flush-8:0	09:06:25	1
3420304	99	45	39,4	cyclictest	3492245	-21	kworker/u8:0+flush-8:0	08:36:25	1
3420304	99	45	37,5	cyclictest	3625726	-21	kworker/u8:1+events_unbound	11:26:26	1
3420303	99	45	35,8	cyclictest	3729793	-21	ntpq	12:16:24	0
3420304	99	44	39,4	cyclictest	2583211	-21	kworker/u8:0+events_unbound	07:11:35	1
3420304	99	44	39,3	cyclictest	3735363	-21	kworker/u8:0+flush-8:0	12:36:30	1
3420304	99	44	38,4	cyclictest	3645014	-21	kworker/u8:0+events_unbound	10:56:31	1
3420304	99	44	38,4	cyclictest	3415281	-21	kworker/u8:1+flush-8:0	07:46:25	1
3420303	99	44	34,8	cyclictest	3694517	-21	ntpq	11:41:23	0
3420304	99	43	37,4	cyclictest	3531819	-21	kworker/u8:0+events_unbound	09:26:16	1
3420304	99	43	37,4	cyclictest	3520878	-21	kworker/u8:1+flush-8:0	08:46:30	1
3420303	99	43	35,6	cyclictest	3437851	-21	diskstats	07:26:13	0
3420304	99	42	38,3	cyclictest	3625726	-21	kworker/u8:1+events_unbound	10:46:13	1
3420304	99	42	27,10	cyclictest	282	-21	systemd-journal	10:11:36	1
3420303	99	42	34,6	cyclictest	3650013	-21	ntpq	10:56:27	0
3420304	99	41	34,5	cyclictest	3625726	-21	kworker/u8:1+flush-8:0	10:36:26	1
3420309	99	40	36,3	cyclictest	3512025	-21	kworker/u8:3+flush-8:0	10:34:37	2
3420304	99	40	35,4	cyclictest	3590399	-21	kworker/u8:0+events_unbound	10:16:16	1
3420304	99	40	32,6	cyclictest	3391494	-21	kworker/u8:2+flush-8:0	07:26:22	1
3420303	99	40	32,5	cyclictest	3420131	-21	latency_hist	07:10:01	0
3420309	99	39	34,4	cyclictest	3467458	-21	kworker/u8:2+events_unbound	07:56:16	2
3420304	99	39	34,4	cyclictest	3471428	-21	ntpq	07:56:29	1
3420304	99	39	32,6	cyclictest	3415281	-21	kworker/u8:1+flush-8:0	08:31:23	1
3420304	99	39	32,5	cyclictest	3704852	-21	kworker/u8:3+events_unbound	11:56:23	1
3420304	99	39	32,5	cyclictest	3625726	-21	kworker/u8:1+flush-8:0	12:01:24	1
3420304	99	39	32,5	cyclictest	3625726	-21	kworker/u8:1+flush-8:0	11:06:42	1
3420309	99	38	27,9	cyclictest	282	-21	systemd-journal	12:33:46	2
3420304	99	38	32,4	cyclictest	3391494	-21	kworker/u8:2+events_unbound	07:16:31	1
3419857	2	38	4,10	sleep1	0	-21	swapper/1	07:06:35	1
3420309	99	37	33,3	cyclictest	3665712	-21	kworker/u8:0+events_unbound	11:37:48	2
3420304	99	37	29,6	cyclictest	3665683	-21	latency_hist	11:15:00	1
3420303	99	37	31,4	cyclictest	3621205	-21	apt-get	10:31:10	0
3420303	99	37	27,8	cyclictest	3556802	-21	cp	09:25:01	0
3420309	99	36	27,7	cyclictest	3547013	-21	tr	09:16:12	2
3420304	99	36	30,5	cyclictest	3625726	-21	kworker/u8:1+events_unbound	10:41:16	1
3420304	99	36	30,4	cyclictest	3625726	-21	kworker/u8:1+events_unbound	12:26:17	1
3420304	99	36	29,5	cyclictest	3442515	-21	apt-get	07:31:09	1
3420303	99	36	30,4	cyclictest	3630787	-21	latency_hist	10:40:00	0
3420303	99	36	26,8	cyclictest	282	-21	systemd-journal	10:50:00	0
3420303	99	36	24,10	cyclictest	3651069	-21	kworker/u8:2+flush-8:0	11:06:40	0
3420303	99	36	1,32	cyclictest	3467036	-21	munin-run	07:55:00	0
3420303	99	35	28,5	cyclictest	3467458	-21	kworker/u8:2+flush-8:0	08:06:25	0
3420303	99	35	26,6	cyclictest	3526634	-21	latency_hist	08:55:00	0
3420309	99	34	29,4	cyclictest	3415281	-21	kworker/u8:1+events_unbound	07:15:06	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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