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 Thu Jun 18, 2026 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3537682	2	179	0,2	sleep3	75	-21	kworker/3:1+events	07:15:00	3
3782395	2	98	0,2	chrt	0	-21	swapper/2	11:15:41	2
3703440	2	83	0,5	sleep1	0	-21	swapper/1	10:00:01	1
3532658	99	72	60,9	cyclictest	1704890	-21	systemd-journal	12:35:00	0
3532664	99	70	63,5	cyclictest	3527656	-21	kworker/u8:1+flush-8:0	08:20:42	2
3532660	99	67	62,4	cyclictest	3527656	-21	kworker/u8:1+flush-8:0	08:15:41	1
3532658	99	66	47,16	cyclictest	3553589	-21	ntpq	07:25:38	0
3532660	99	64	59,4	cyclictest	3713058	-21	kworker/u8:2+events_unbound	12:20:01	1
3532660	99	64	56,5	cyclictest	3727345	-21	ntpq	10:20:38	1
3532660	99	64	56,5	cyclictest	3727345	-21	ntpq	10:20:38	1
3532660	99	63	58,4	cyclictest	3527656	-21	kworker/u8:1+events_unbound	07:30:44	1
3532660	99	63	54,7	cyclictest	3517865	-21	kworker/u8:3+flush-8:0	07:35:38	1
3532660	99	62	57,3	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	11:05:42	1
3532660	99	60	54,4	cyclictest	3527656	-21	kworker/u8:1+flush-8:0	07:55:26	1
3532660	99	60	50,7	cyclictest	3828890	-21	kworker/u8:0+flush-8:0	12:20:37	1
3687391	2	59	0,4	sleep0	20	1	rcuc/0	09:40:32	0
3532660	99	59	53,4	cyclictest	3771820	-21	kworker/u8:1+events_unbound	11:30:40	1
3532660	99	59	51,5	cyclictest	3636635	-21	kworker/u8:3+events_unbound	09:40:25	1
3532660	99	58	52,4	cyclictest	3713058	-21	kworker/u8:2+events_unbound	11:00:38	1
3532660	99	58	51,5	cyclictest	3778121	-21	kworker/u8:3+events_unbound	11:25:36	1
3532660	99	58	47,8	cyclictest	3642820	-21	ntpq	08:55:35	1
3812159	2	57	0,4	sleep1	3812164	-21	unixbench_singl	11:45:42	1
3532664	99	57	52,3	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	10:15:36	2
3532664	99	57	52,3	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	10:15:35	2
3532660	99	57	51,4	cyclictest	3699353	-21	kworker/u8:0+flush-8:0	10:15:39	1
3532660	99	57	51,4	cyclictest	3699353	-21	kworker/u8:0+flush-8:0	10:15:38	1
3532660	99	57	50,5	cyclictest	3517865	-21	kworker/u8:3+flush-8:0	08:05:35	1
3532658	99	57	48,7	cyclictest	3768021	-21	/usr/sbin/munin	11:05:34	0
3532660	99	56	50,4	cyclictest	3828890	-21	kworker/u8:0+events_unbound	12:25:24	1
3532660	99	56	50,4	cyclictest	3678199	-21	kworker/u8:0+events_unbound	09:35:35	1
3532660	99	56	49,5	cyclictest	3475599	-21	kworker/u8:2+flush-8:0	07:10:41	1
3532660	99	55	49,4	cyclictest	3574247	-21	kworker/u8:2+events_unbound	08:40:33	1
3532660	99	55	48,5	cyclictest	3527656	-21	kworker/u8:1+events_unbound	08:30:00	1
3532658	99	55	48,5	cyclictest	3796784	-21	ntpq	11:30:34	0
3532660	99	54	47,5	cyclictest	3663329	-21	kworker/u8:1+events_unbound	09:30:39	1
3532660	99	54	45,6	cyclictest	3653791	-21	latency_hist	09:10:01	1
3532658	99	54	45,6	cyclictest	3732207	-21	ntpq	10:25:34	0
3532660	99	53	48,3	cyclictest	3828890	-21	kworker/u8:0+events_unbound	12:35:40	1
3532660	99	53	43,8	cyclictest	3802929	-21	/usr/sbin/munin	11:40:38	1
3532660	99	52	46,5	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	12:10:41	1
3532660	99	52	45,4	cyclictest	3778121	-21	kworker/u8:3+flush-8:0	11:20:26	1
3532658	99	52	45,5	cyclictest	1704890	-21	systemd-journal	10:20:40	0
3532658	99	52	45,5	cyclictest	1704890	-21	systemd-journal	10:20:39	0
3532660	99	51	45,4	cyclictest	3699353	-21	kworker/u8:0+events_unbound	10:10:38	1
3532660	99	51	43,6	cyclictest	3742070	-21	ntpq	10:35:35	1
3532658	99	51	43,6	cyclictest	3662790	-21	ntpq	09:15:36	0
3532658	99	51	42,6	cyclictest	3574231	-21	latency_hist	07:50:01	0
3532658	99	51	42,6	cyclictest	3574231	-21	latency_hist	07:50:00	0
3532658	99	51	41,7	cyclictest	1704890	-21	systemd-journal	08:20:01	0
3532660	99	50	45,3	cyclictest	3517865	-21	kworker/u8:3+flush-8:0	07:20:00	1
3532660	99	50	43,4	cyclictest	3636635	-21	kworker/u8:3+flush-8:0	09:45:40	1
3532658	99	50	28,19	cyclictest	3817708	-21	/usr/sbin/munin	11:55:36	0
3532664	99	49	44,3	cyclictest	3636635	-21	kworker/u8:3+flush-8:0	10:00:39	2
3532660	99	49	42,5	cyclictest	3626875	-21	kworker/u8:0+flush-8:0	09:00:36	1
3532658	99	49	42,4	cyclictest	3475599	-21	kworker/u8:2+flush-8:0	07:10:31	0
3532658	99	49	41,5	cyclictest	3637796	-21	ntpq	08:50:34	0
3532660	99	48	42,4	cyclictest	3574247	-21	kworker/u8:2+events_unbound	09:20:36	1
3532660	99	48	41,6	cyclictest	3771820	-21	kworker/u8:1+flush-8:0	11:55:36	1
3532660	99	48	41,5	cyclictest	3517865	-21	kworker/u8:3+flush-8:0	08:00:35	1
3532658	99	48	41,5	cyclictest	3629092	-21	/usr/sbin/munin	08:45:39	0
3532658	99	48	40,6	cyclictest	3698352	-21	latency_hist	09:55:01	0
3532658	99	47	39,6	cyclictest	3791942	-21	ntpq	11:25:36	0
3532664	99	46	41,3	cyclictest	3517865	-21	kworker/u8:3+events_unbound	07:40:35	2
3532660	99	46	41,4	cyclictest	3748207	-21	kworker/u8:0+events_unbound	10:55:26	1
3532660	99	46	41,4	cyclictest	3517865	-21	kworker/u8:3+flush-8:0	07:25:36	1
3532660	99	46	41,3	cyclictest	3713058	-21	kworker/u8:2+events_unbound	10:30:39	1
3532660	99	46	41,3	cyclictest	3527656	-21	kworker/u8:1+flush-8:0	07:40:32	1
3532660	99	46	40,4	cyclictest	3713058	-21	kworker/u8:2+events_unbound	11:10:43	1
3532660	99	46	40,4	cyclictest	3663329	-21	kworker/u8:1+events_unbound	10:05:40	1
3532660	99	46	39,5	cyclictest	3626875	-21	kworker/u8:0+flush-8:0	08:45:40	1
3532664	99	45	39,5	cyclictest	3574247	-21	kworker/u8:2+flush-8:0	08:55:37	2
3532664	99	45	39,4	cyclictest	3574247	-21	kworker/u8:2+flush-8:0	08:35:37	2
3532660	99	45	41,3	cyclictest	3527656	-21	kworker/u8:1+events_unbound	07:45:41	1
3532660	99	45	41,3	cyclictest	3527656	-21	kworker/u8:1+events_unbound	07:45:41	1
3532660	99	45	39,4	cyclictest	3517865	-21	kworker/u8:3+events_unbound	08:20:25	1
3532660	99	45	38,5	cyclictest	3527656	-21	kworker/u8:1+flush-8:0	07:20:36	1
3532664	99	44	38,4	cyclictest	3713058	-21	kworker/u8:2+events_unbound	11:55:43	2
3532660	99	44	39,4	cyclictest	3636635	-21	kworker/u8:3+events_unbound	09:10:28	1
3532660	99	44	38,5	cyclictest	3778121	-21	kworker/u8:3+events_unbound	12:05:37	1
3532660	99	44	38,5	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	12:00:35	1
3532660	99	44	37,5	cyclictest	3574247	-21	kworker/u8:2+flush-8:0	09:25:39	1
3532658	99	44	34,7	cyclictest	3568388	-21	ntpq	07:40:37	0
3532658	99	44	24,17	cyclictest	3851456	-21	ntpq	12:25:34	0
3532664	99	43	38,4	cyclictest	3574247	-21	kworker/u8:2+flush-8:0	09:05:40	2
3532660	99	43	37,4	cyclictest	3574247	-21	kworker/u8:2+flush-8:0	09:15:35	1
3532658	99	43	33,7	cyclictest	1704890	-21	systemd-journal	07:20:00	0
3532658	99	43	25,16	cyclictest	3703300	-21	cron	10:00:00	0
3532660	99	42	37,4	cyclictest	3713058	-21	kworker/u8:2+flush-8:0	10:45:37	1
3532660	99	42	37,3	cyclictest	3728395	-21	kworker/u8:4+events_unbound	10:25:23	1
3532658	99	42	20,8	cyclictest	1704890	-21	systemd-journal	10:04:59	0
3528407	2	42	3,31	sleep3	0	-21	swapper/3	07:05:30	3
3532664	99	41	37,3	cyclictest	3828890	-21	kworker/u8:0+flush-8:0	12:30:38	2
3532664	99	41	35,4	cyclictest	3778121	-21	kworker/u8:3+flush-8:0	11:50:26	2
3532664	99	41	31,8	cyclictest	1704890	-21	systemd-journal	09:32:15	2
3532660	99	40	34,4	cyclictest	3636635	-21	kworker/u8:3+flush-8:0	09:50:37	1
3532658	99	40	25,13	cyclictest	3771820	-21	kworker/u8:1+flush-8:0	12:00:30	0
3532658	99	40	24,14	cyclictest	3555208	-21	irqcore	07:30:31	0
3532658	99	40	21,17	cyclictest	3713286	-21	sh	10:10:00	0
3532658	99	40	21,17	cyclictest	3593120	-21	ntp_kernel_pll_	08:05:34	0
3532658	99	40	15,3	cyclictest	42	1	rcuog/2	11:45:40	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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