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 May 28, 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
3789736	2	182	0,2	sleep3	48	1	ktimers/3	07:26:00	3
4061341	2	109	0,3	sleep3	75	-21	kworker/3:1-events	12:00:47	3
3768592	99	68	61,5	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	09:15:56	1
3768592	99	67	60,6	cyclictest	3820180	-21	kworker/u8:0+flush-8:0	08:00:58	1
3768592	99	66	60,5	cyclictest	3860185	-21	kworker/u8:1+flush-8:0	10:20:00	1
3768592	99	65	58,5	cyclictest	3835238	-21	kworker/u8:3+flush-8:0	08:15:57	1
3768592	99	64	57,5	cyclictest	3949181	-21	kworker/u8:2+flush-8:0	11:20:53	1
3768592	99	63	58,4	cyclictest	3914275	-21	kworker/u8:2+events_unbound	09:40:51	1
3768592	99	62	58,3	cyclictest	4043662	-21	kworker/u8:1+events_unbound	12:35:54	1
3768592	99	62	57,3	cyclictest	3860185	-21	kworker/u8:1+flush-8:0	10:10:57	1
3768592	99	61	56,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	07:55:56	1
3768592	99	61	56,4	cyclictest	3410608	-21	kworker/u8:0+flush-8:0	07:10:56	1
3768592	99	60	55,4	cyclictest	4043662	-21	kworker/u8:1+flush-8:0	11:45:54	1
3768592	99	60	54,5	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	09:20:51	1
3768592	99	59	53,5	cyclictest	4043662	-21	kworker/u8:1+flush-8:0	12:25:57	1
3768592	99	59	52,5	cyclictest	3949181	-21	kworker/u8:2+flush-8:0	11:00:55	1
3768592	99	58	53,4	cyclictest	4043662	-21	kworker/u8:1+flush-8:0	12:30:57	1
3768592	99	58	53,4	cyclictest	3983490	-21	kworker/u8:0+events_unbound	11:35:51	1
3768592	99	58	53,3	cyclictest	3860185	-21	kworker/u8:1+events_unbound	09:30:42	1
3768592	99	58	52,5	cyclictest	3909310	-21	kworker/u8:3+events_unbound	11:30:54	1
3768592	99	56	51,4	cyclictest	3983490	-21	kworker/u8:0+flush-8:0	12:20:55	1
3768592	99	56	51,3	cyclictest	3909310	-21	kworker/u8:3+flush-8:0	09:35:57	1
3768592	99	56	50,4	cyclictest	3730869	-21	kworker/u8:1+events_unbound	07:20:43	1
3768592	99	56	47,7	cyclictest	3948574	-21	ntpq	10:05:52	1
3804105	2	55	0,3	chrt	75	-21	kworker/3:1-events	07:40:48	3
3768592	99	55	51,3	cyclictest	4043662	-21	kworker/u8:1+events_unbound	12:05:41	1
3768589	99	55	45,7	cyclictest	4053715	-21	latency_hist	11:55:01	0
3768592	99	54	49,4	cyclictest	3815001	-21	kworker/u8:1+events_unbound	08:10:54	1
3768592	99	54	48,4	cyclictest	3949181	-21	kworker/u8:2+events_unbound	10:30:45	1
3768592	99	54	47,5	cyclictest	3909310	-21	kworker/u8:3+flush-8:0	09:55:57	1
3768592	99	54	47,5	cyclictest	3795391	-21	kworker/u8:3+events_unbound	07:40:48	1
3768592	99	53	48,4	cyclictest	3820180	-21	kworker/u8:0+events_unbound	08:05:56	1
3768592	99	53	47,5	cyclictest	3860185	-21	kworker/u8:1+events_unbound	09:45:56	1
3768592	99	53	47,5	cyclictest	3410608	-21	kworker/u8:0+events_unbound	07:15:03	1
3768592	99	52	47,4	cyclictest	3983490	-21	kworker/u8:0+flush-8:0	12:15:57	1
3768592	99	52	46,4	cyclictest	3768448	-21	kworker/u8:2+events_unbound	08:35:42	1
3768592	99	52	46,4	cyclictest	3768448	-21	kworker/u8:2+events_unbound	08:35:42	1
3768589	99	52	47,4	cyclictest	3899751	-21	kworker/u8:0+flush-8:0	09:30:56	0
3768592	99	51	47,3	cyclictest	3860185	-21	kworker/u8:1+events_unbound	10:20:43	1
3768592	99	51	46,4	cyclictest	3768448	-21	kworker/u8:2+events_unbound	07:50:46	1
3768592	99	51	46,3	cyclictest	3835238	-21	kworker/u8:3+events_unbound	08:45:45	1
3768592	99	51	45,5	cyclictest	3949181	-21	kworker/u8:2+events_unbound	10:55:53	1
3768592	99	51	44,5	cyclictest	3949181	-21	kworker/u8:2+events_unbound	11:40:42	1
3768589	99	51	40,8	cyclictest	3878855	-21	ntpq	08:55:54	0
3953059	2	50	0,5	sleep3	45	1	irq_work/3	10:10:48	3
3768589	99	50	41,7	cyclictest	3989530	-21	/usr/sbin/munin	10:50:56	0
3768589	99	50	41,7	cyclictest	3989530	-21	/usr/sbin/munin	10:50:56	0
3768592	99	49	44,3	cyclictest	3909310	-21	kworker/u8:3+flush-8:0	10:35:52	1
3768592	99	49	43,5	cyclictest	3835238	-21	kworker/u8:3+events_unbound	08:50:48	1
3768589	99	49	42,5	cyclictest	1704890	-21	systemd-journal	10:00:50	0
3768592	99	48	43,4	cyclictest	3860185	-21	kworker/u8:1+events_unbound	09:05:48	1
3768592	99	48	42,4	cyclictest	3835238	-21	kworker/u8:3+flush-8:0	08:20:42	1
3768592	99	48	41,5	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	09:10:53	1
3768592	99	47	42,4	cyclictest	3949181	-21	kworker/u8:2+flush-8:0	10:25:47	1
3768592	99	47	42,4	cyclictest	3860185	-21	kworker/u8:1+flush-8:0	10:45:00	1
3768592	99	47	42,3	cyclictest	3949181	-21	kworker/u8:2+events_unbound	11:15:59	1
3768592	99	47	40,5	cyclictest	3874777	-21	kworker/u8:0+flush-8:0	09:00:53	1
3768589	99	47	37,8	cyclictest	1704890	-21	systemd-journal	09:10:01	0
3768592	99	46	42,3	cyclictest	3949181	-21	kworker/u8:2+events_unbound	11:30:01	1
3768592	99	46	41,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	08:40:55	1
3768589	99	46	32,10	cyclictest	1704890	-21	systemd-journal	07:15:50	0
3768594	99	45	37,6	cyclictest	4043628	-21	apt-get	11:45:00	2
3768592	99	45	40,4	cyclictest	4043662	-21	kworker/u8:1+events_unbound	11:55:51	1
3768589	99	45	41,3	cyclictest	3410608	-21	kworker/u8:0+events_unbound	07:10:40	0
4052171	2	44	0,2	sleep3	0	-21	swapper/3	11:50:47	3
3768592	99	44	39,4	cyclictest	3909310	-21	kworker/u8:3+flush-8:0	11:10:57	1
3768592	99	44	39,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	09:25:58	1
3768592	99	44	38,4	cyclictest	3949181	-21	kworker/u8:2+events_unbound	11:05:46	1
3768589	99	44	33,8	cyclictest	4008168	-21	ntpq	11:05:52	0
3768589	99	43	38,4	cyclictest	3909310	-21	kworker/u8:3+flush-8:0	11:30:56	0
3768589	99	43	38,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	09:20:57	0
3768589	99	43	37,4	cyclictest	3835238	-21	kworker/u8:3+events_unbound	08:15:56	0
3768594	99	42	35,5	cyclictest	4068576	-21	apt-get	12:10:03	2
3768592	99	42	39,2	cyclictest	3835238	-21	kworker/u8:3+flush-8:0	08:25:58	1
3768592	99	42	38,3	cyclictest	4043662	-21	kworker/u8:1+flush-8:0	11:50:56	1
3768592	99	42	35,5	cyclictest	3914275	-21	kworker/u8:2+flush-8:0	09:50:45	1
3768592	99	42	32,8	cyclictest	4062720	-21	ntpq	12:00:49	1
3768589	99	42	38,3	cyclictest	3949181	-21	kworker/u8:2+flush-8:0	11:20:57	0
4049469	2	41	0,5	sleep2	0	-21	swapper/2	11:50:43	2
3768592	99	41	35,4	cyclictest	3983490	-21	kworker/u8:0+flush-8:0	10:50:47	1
3768592	99	41	35,4	cyclictest	3983490	-21	kworker/u8:0+flush-8:0	10:50:47	1
3768589	99	41	37,3	cyclictest	4043662	-21	kworker/u8:1+flush-8:0	12:35:55	0
3768589	99	41	35,4	cyclictest	3795391	-21	kworker/u8:3+events_unbound	07:50:51	0
3768589	99	41	34,6	cyclictest	3835238	-21	kworker/u8:3+events_unbound	08:25:53	0
3768589	99	41	32,7	cyclictest	3874758	-21	latency_hist	08:55:02	0
3768592	99	40	36,3	cyclictest	3934438	-21	kworker/u8:0+flush-8:0	10:00:57	1
3768592	99	40	35,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	08:30:49	1
3768592	99	40	35,4	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	08:30:49	1
3768589	99	40	34,5	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	08:35:55	0
3768589	99	40	34,5	cyclictest	3768448	-21	kworker/u8:2+flush-8:0	08:35:54	0
3768589	99	40	34,4	cyclictest	3983490	-21	kworker/u8:0+events_unbound	12:20:52	0
3768589	99	39	29,7	cyclictest	1704890	-21	systemd-journal	09:20:01	0
3768592	99	38	31,5	cyclictest	4043662	-21	kworker/u8:1+events_unbound	12:10:01	1
3768589	99	38	33,3	cyclictest	3914275	-21	kworker/u8:2+events_unbound	09:50:44	0
3768589	99	38	32,4	cyclictest	3949181	-21	kworker/u8:2+events_unbound	10:25:41	0
4092738	2	37	0,2	sleep3	48	1	ktimers/3	12:30:57	3
3768589	99	36	32,3	cyclictest	3768448	-21	kworker/u8:2+events_unbound	09:10:55	0
3768594	99	35	29,4	cyclictest	3884693	-21	gpgv	09:05:01	2
3768594	99	35	25,8	cyclictest	1704890	-21	systemd-journal	07:52:50	2
3768592	99	35	28,5	cyclictest	3810038	-21	latency_hist	07:50:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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