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 Tue Jun 09, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3601900	2	88	0,6	chrt	0	-21	swapper/2	22:50:40	2
3482777	2	73	0,7	sleep2	0	-21	swapper/2	20:50:41	2
3378487	99	64	57,5	cyclictest	3378395	-21	kworker/u8:0+flush-8:0	19:25:48	1
3542129	2	62	0,6	sleep2	0	-21	swapper/2	21:50:40	2
3378487	99	62	56,4	cyclictest	3492070	-21	kworker/u8:1+events_unbound	22:00:00	1
3378487	99	59	47,8	cyclictest	1704890	-21	systemd-journal	22:00:33	1
3378487	99	57	50,5	cyclictest	3646772	-21	kworker/u8:0+flush-8:0	23:55:48	1
3378487	99	56	50,4	cyclictest	3464522	-21	kworker/u8:2+events_unbound	21:00:00	1
3378487	99	55	48,5	cyclictest	3558794	-21	kworker/u8:0+flush-8:0	23:20:42	1
3378486	99	54	45,6	cyclictest	3534145	-21	latency_hist	21:45:01	0
3378491	99	53	42,8	cyclictest	1704890	-21	systemd-journal	22:25:33	2
3378487	99	53	45,5	cyclictest	3646772	-21	kworker/u8:0+flush-8:0	00:20:50	1
3378486	99	53	47,4	cyclictest	3363694	-21	kworker/u8:2+events_unbound	19:10:51	0
3378487	99	52	45,5	cyclictest	3524457	-21	kworker/u8:3+flush-8:0	22:45:47	1
3378487	99	51	47,3	cyclictest	3633208	-21	kworker/u8:1+flush-8:0	23:25:48	1
3378487	99	51	46,3	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	20:10:53	1
3378487	99	51	45,4	cyclictest	3646772	-21	kworker/u8:0+events_unbound	00:10:35	1
3378487	99	51	41,6	cyclictest	1704890	-21	systemd-journal	20:20:33	1
3378486	99	50	42,6	cyclictest	3678677	-21	/usr/sbin/munin	00:10:50	0
3378487	99	49	44,3	cyclictest	3464522	-21	kworker/u8:2+flush-8:0	20:45:38	1
3378487	99	49	41,6	cyclictest	3524457	-21	kworker/u8:3+flush-8:0	23:35:43	1
3378487	99	49	39,7	cyclictest	1704890	-21	systemd-journal	23:45:01	1
3378487	99	48	43,4	cyclictest	3479495	-21	kworker/u8:3+events_unbound	21:05:38	1
3378487	99	48	43,3	cyclictest	3363694	-21	kworker/u8:2+events_unbound	19:45:34	1
3378487	99	48	40,6	cyclictest	3524457	-21	kworker/u8:3+flush-8:0	23:00:45	1
3378486	99	48	40,6	cyclictest	1704890	-21	systemd-journal	23:15:00	0
3378487	99	47	42,4	cyclictest	3479495	-21	kworker/u8:3+events_unbound	21:10:34	1
3378487	99	47	41,4	cyclictest	3524457	-21	kworker/u8:3+events_unbound	22:40:00	1
3378487	99	47	40,5	cyclictest	3534371	-21	kworker/u8:2+flush-8:0	21:50:45	1
3378487	99	47	38,7	cyclictest	3534371	-21	kworker/u8:2+flush-8:0	22:05:44	1
3378486	99	47	36,8	cyclictest	3363694	-21	kworker/u8:2+flush-8:0	19:20:45	0
3378487	99	46	40,4	cyclictest	3558794	-21	kworker/u8:0+events_unbound	23:15:43	1
3378487	99	46	40,4	cyclictest	3378395	-21	kworker/u8:0+flush-8:0	20:50:46	1
3378487	99	46	40,4	cyclictest	3238108	-21	kworker/u8:1+events_unbound	19:30:46	1
3378487	99	45	40,3	cyclictest	3378395	-21	kworker/u8:0+events_unbound	19:15:03	1
3378487	99	45	39,5	cyclictest	3464522	-21	kworker/u8:2+flush-8:0	20:40:49	1
3378487	99	45	39,4	cyclictest	3378395	-21	kworker/u8:0+flush-8:0	20:30:40	1
3378487	99	45	38,5	cyclictest	3524457	-21	kworker/u8:3+events_unbound	22:40:45	1
3378487	99	44	39,4	cyclictest	3633208	-21	kworker/u8:1+events_unbound	23:45:31	1
3378487	99	44	38,5	cyclictest	3569242	-21	kworker/u8:2+flush-8:0	23:05:49	1
3378487	99	44	37,5	cyclictest	3524457	-21	kworker/u8:3+flush-8:0	21:35:45	1
3378487	99	44	37,5	cyclictest	3524457	-21	kworker/u8:3+flush-8:0	21:35:45	1
3378486	99	44	37,5	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	19:35:34	0
3378487	99	43	38,4	cyclictest	3492070	-21	kworker/u8:1+flush-8:0	21:20:44	1
3378487	99	43	37,4	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	19:40:44	1
3378487	99	43	37,4	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	19:40:44	1
3378486	99	43	35,5	cyclictest	3569002	-21	latency_hist	22:20:01	0
3378487	99	42	37,3	cyclictest	3633208	-21	kworker/u8:1+flush-8:0	23:50:48	1
3378487	99	42	37,3	cyclictest	3534371	-21	kworker/u8:2+events_unbound	21:50:01	1
3378487	99	42	36,4	cyclictest	3707719	-21	kworker/u8:3+events_unbound	00:40:00	1
3378487	99	42	36,4	cyclictest	3558794	-21	kworker/u8:0+flush-8:0	22:25:43	1
3378487	99	42	36,4	cyclictest	3404997	-21	kworker/u8:3+events_unbound	20:00:35	1
3378487	99	42	29,9	cyclictest	3603704	-21	latency_hist	22:55:01	1
3378487	99	41	36,4	cyclictest	3404997	-21	kworker/u8:3+events_unbound	19:55:42	1
3378487	99	41	35,4	cyclictest	3529491	-21	apt-get	21:40:29	1
3378487	99	41	35,4	cyclictest	3363694	-21	kworker/u8:2+events_unbound	19:10:35	1
3378486	99	41	34,5	cyclictest	3514200	-21	cp	21:25:00	0
3378486	99	41	0,38	cyclictest	3603756	-21	munin-run	22:55:01	0
3378487	99	40	35,3	cyclictest	3569242	-21	kworker/u8:2+flush-8:0	22:55:42	1
3378487	99	40	35,3	cyclictest	3492070	-21	kworker/u8:1+events_unbound	21:00:43	1
3378487	99	40	31,6	cyclictest	3677536	-21	kworker/u8:1+flush-8:0	00:25:45	1
3424601	2	39	0,2	sleep3	75	-21	kworker/3:1+mm_percpu_wq	19:50:51	3
3378487	99	39	34,3	cyclictest	3524457	-21	kworker/u8:3+events_unbound	23:15:01	1
3378487	99	39	33,4	cyclictest	3404997	-21	kworker/u8:3+events_unbound	19:50:51	1
3378487	99	39	32,5	cyclictest	3646772	-21	kworker/u8:0+events_unbound	00:30:43	1
3378486	99	39	32,5	cyclictest	3378395	-21	kworker/u8:0+flush-8:0	19:25:43	0
3378486	99	39	30,7	cyclictest	1704890	-21	systemd-journal	20:10:01	0
3378487	99	38	31,6	cyclictest	3492070	-21	kworker/u8:1+flush-8:0	22:10:41	1
3378491	99	37	32,4	cyclictest	3646772	-21	kworker/u8:0+events_unbound	00:05:42	2
3378487	99	37	33,3	cyclictest	3558794	-21	kworker/u8:0+flush-8:0	22:15:47	1
3378487	99	37	31,4	cyclictest	3668816	-21	kworker/u8:2+flush-8:0	00:00:46	1
3378487	99	37	31,4	cyclictest	3633208	-21	kworker/u8:1+flush-8:0	23:30:35	1
3378487	99	37	31,4	cyclictest	3633208	-21	kworker/u8:1+flush-8:0	23:30:34	1
3378487	99	37	31,4	cyclictest	3558794	-21	kworker/u8:0+events_unbound	22:20:31	1
3378487	99	37	29,6	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	19:35:42	1
3378486	99	37	30,5	cyclictest	3687469	-21	ntpq	00:15:43	0
3378486	99	37	28,6	cyclictest	3549248	-21	latency_hist	22:00:02	0
3378187	2	37	3,9	sleep1	0	-21	swapper/1	19:08:11	1
3378487	99	36	30,4	cyclictest	3558794	-21	kworker/u8:0+flush-8:0	22:30:36	1
3378487	99	36	27,7	cyclictest	3390841	-21	apt-get	19:20:29	1
3378487	99	36	24,9	cyclictest	1704890	-21	systemd-journal	20:05:32	1
3378486	99	36	27,6	cyclictest	1704890	-21	systemd-journal	00:34:59	0
3378486	99	36	24,9	cyclictest	1704890	-21	systemd-journal	23:30:00	0
3378486	99	36	1,33	cyclictest	3579550	-21	sshd	22:30:34	0
3378486	99	35	28,5	cyclictest	1704890	-21	systemd-journal	21:27:49	0
3378491	99	34	27,5	cyclictest	3573962	-21	turbostat.cron	22:25:00	2
3378486	99	34	27,5	cyclictest	3668816	-21	kworker/u8:2+flush-8:0	00:05:01	0
3378486	99	34	27,5	cyclictest	3534371	-21	kworker/u8:2+flush-8:0	22:00:31	0
3378491	99	33	28,3	cyclictest	3404997	-21	kworker/u8:3+flush-8:0	20:15:44	2
3378487	99	33	28,4	cyclictest	3683046	-21	kworker/u8:2+flush-8:0	00:15:51	1
3378487	99	33	28,3	cyclictest	3524253	-21	systemd-run	21:35:00	1
3378487	99	33	27,4	cyclictest	3378395	-21	kworker/u8:0+flush-8:0	20:25:43	1
3378486	99	33	29,3	cyclictest	3558794	-21	kworker/u8:0+flush-8:0	22:20:32	0
3378491	99	32	28,3	cyclictest	3479495	-21	kworker/u8:3+flush-8:0	21:00:46	2
3378491	99	32	28,3	cyclictest	3464522	-21	kworker/u8:2+events_unbound	21:30:37	2
3378491	99	32	28,3	cyclictest	3444899	-21	kworker/u8:1+flush-8:0	20:35:39	2
3378486	99	32	25,5	cyclictest	3589162	-21	apt-get	22:40:28	0
3378486	99	32	22,8	cyclictest	3425604	-21	diskstats	19:55:33	0
3682130	2	31	0,6	sleep3	45	1	irq_work/3	00:10:42	3
3378491	99	31	25,4	cyclictest	3404997	-21	kworker/u8:3+events_unbound	19:50:37	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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