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 23, 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
443131	2	82	0,3	sleep3	75	-21	kworker/3:1-events	19:55:38	3
391930	99	67	61,4	cyclictest	582762	-21	gpgv	22:20:01	2
391926	99	66	61,3	cyclictest	3759298	-21	kworker/u8:2+events_unbound	19:15:38	1
391926	99	66	60,4	cyclictest	423831	-21	kworker/u8:1+flush-8:0	20:00:37	1
391926	99	64	58,5	cyclictest	502672	-21	kworker/u8:0+events_unbound	21:05:35	1
391926	99	64	57,4	cyclictest	349801	-21	kworker/u8:0+events_unbound	19:40:01	1
391926	99	64	52,9	cyclictest	666987	-21	ntpq	23:40:33	1
391926	99	63	58,3	cyclictest	527777	-21	kworker/u8:1+flush-8:0	21:50:35	1
391926	99	62	57,3	cyclictest	468564	-21	kworker/u8:3+events_unbound	22:30:18	1
391926	99	62	56,5	cyclictest	642739	-21	kworker/u8:1+events_unbound	23:55:33	1
391926	99	61	57,3	cyclictest	423831	-21	kworker/u8:1+events_unbound	20:20:33	1
391926	99	61	55,4	cyclictest	518033	-21	kworker/u8:2+flush-8:0	21:25:21	1
391926	99	61	55,4	cyclictest	468564	-21	kworker/u8:3+flush-8:0	23:30:32	1
391926	99	61	54,5	cyclictest	502672	-21	kworker/u8:0+flush-8:0	21:00:36	1
391926	99	61	54,4	cyclictest	423831	-21	kworker/u8:1+events_unbound	20:05:22	1
391930	99	60	54,4	cyclictest	633026	-21	gpgv	23:10:01	2
391926	99	60	55,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	20:50:39	1
391926	99	60	55,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	20:50:38	1
391926	99	60	55,4	cyclictest	423831	-21	kworker/u8:1+events_unbound	19:45:20	1
391926	99	60	55,3	cyclictest	642739	-21	kworker/u8:1+flush-8:0	00:15:21	1
391926	99	60	53,4	cyclictest	448755	-21	kworker/u8:2+events_unbound	20:40:24	1
391926	99	59	48,8	cyclictest	463385	-21	latency_hist	20:20:01	1
391926	99	58	52,4	cyclictest	557648	-21	kworker/u8:2+flush-8:0	22:45:33	1
391923	99	58	47,8	cyclictest	477316	-21	ntpq	20:30:33	0
391926	99	57	51,5	cyclictest	468564	-21	kworker/u8:3+flush-8:0	23:00:21	1
391923	99	57	47,7	cyclictest	602100	-21	ntpq	22:35:33	0
391926	99	56	51,4	cyclictest	518033	-21	kworker/u8:2+events_unbound	21:20:35	1
391926	99	56	51,4	cyclictest	518033	-21	kworker/u8:2+events_unbound	21:20:34	1
391926	99	56	50,4	cyclictest	473526	-21	kworker/u8:1+flush-8:0	21:10:40	1
391923	99	56	50,4	cyclictest	423831	-21	kworker/u8:1+flush-8:0	20:05:36	0
391926	99	55	50,4	cyclictest	653220	-21	kworker/u8:2+flush-8:0	23:50:30	1
391926	99	55	47,6	cyclictest	683042	-21	/usr/sbin/munin	00:00:33	1
391923	99	55	48,4	cyclictest	468564	-21	kworker/u8:3+flush-8:0	20:35:35	0
391926	99	54	50,3	cyclictest	642739	-21	kworker/u8:1+flush-8:0	23:20:32	1
391926	99	54	48,4	cyclictest	607988	-21	kworker/u8:0+flush-8:0	22:55:22	1
391926	99	54	47,5	cyclictest	642739	-21	kworker/u8:1+flush-8:0	00:30:31	1
391926	99	54	44,7	cyclictest	437801	-21	ntpq	19:50:34	1
685201	2	53	0,4	chrt	75	-21	kworker/3:1-events	00:00:27	3
391926	99	53	49,3	cyclictest	575760	-21	kworker/u8:1+events_unbound	22:15:23	1
391926	99	53	47,4	cyclictest	448755	-21	kworker/u8:2+events_unbound	20:45:33	1
391926	99	53	46,5	cyclictest	575760	-21	kworker/u8:1+events_unbound	22:40:34	1
391926	99	53	45,6	cyclictest	468564	-21	kworker/u8:3+events_unbound	22:35:03	1
391926	99	52	48,3	cyclictest	537288	-21	kworker/u8:0+flush-8:0	21:40:22	1
391926	99	52	46,4	cyclictest	653220	-21	kworker/u8:2+flush-8:0	00:25:20	1
391926	99	51	46,4	cyclictest	557648	-21	kworker/u8:2+events_unbound	22:05:25	1
391926	99	51	46,3	cyclictest	3759298	-21	kworker/u8:2+events_unbound	19:20:25	1
391926	99	51	45,4	cyclictest	518033	-21	kworker/u8:2+events_unbound	21:30:31	1
391926	99	51	44,5	cyclictest	349801	-21	kworker/u8:0+events_unbound	20:10:36	1
391926	99	51	43,6	cyclictest	557648	-21	kworker/u8:2+flush-8:0	21:55:34	1
391926	99	51	36,5	cyclictest	642739	-21	kworker/u8:1+flush-8:0	23:25:23	1
391923	99	51	45,4	cyclictest	513151	-21	apt-get	21:10:01	0
391923	99	51	44,5	cyclictest	575760	-21	kworker/u8:1+events_unbound	22:15:37	0
667951	2	50	0,2	chrt	0	-21	swapper/2	23:45:01	2
391930	99	50	42,5	cyclictest	577906	-21	cat	22:15:00	2
391930	99	50	39,8	cyclictest	1704890	-21	systemd-journal	23:55:38	2
391926	99	50	45,4	cyclictest	607988	-21	kworker/u8:0+events_unbound	23:05:33	1
391923	99	50	41,7	cyclictest	717892	-21	latency_hist	00:35:01	0
391923	99	50	40,7	cyclictest	507269	-21	ntpq	21:00:30	0
391923	99	49	41,5	cyclictest	642147	-21	ntpq	23:15:32	0
391926	99	48	29,6	cyclictest	473526	-21	kworker/u8:1+events_unbound	20:55:38	1
391923	99	48	42,4	cyclictest	642739	-21	kworker/u8:1+events_unbound	23:45:38	0
391926	99	47	40,5	cyclictest	575760	-21	kworker/u8:1+flush-8:0	22:20:32	1
391923	99	47	39,5	cyclictest	557648	-21	kworker/u8:2+events_unbound	22:25:37	0
391926	99	46	39,5	cyclictest	557648	-21	kworker/u8:2+events_unbound	22:00:25	1
391926	99	46	39,5	cyclictest	468564	-21	kworker/u8:3+flush-8:0	21:35:32	1
391926	99	46	38,5	cyclictest	591946	-21	ntpq	22:25:31	1
391926	99	46	37,7	cyclictest	391470	-21	kworker/u8:1+flush-8:0	19:10:33	1
391926	99	45	39,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	20:35:22	1
391923	99	45	41,3	cyclictest	468564	-21	kworker/u8:3+flush-8:0	23:30:35	0
391923	99	45	40,4	cyclictest	423831	-21	kworker/u8:1+events_unbound	19:55:23	0
391923	99	45	39,4	cyclictest	653220	-21	kworker/u8:2+events_unbound	00:00:38	0
391926	99	44	39,3	cyclictest	557648	-21	kworker/u8:2+flush-8:0	23:15:28	1
391926	99	44	38,5	cyclictest	642739	-21	kworker/u8:1+flush-8:0	23:45:33	1
391926	99	44	27,12	cyclictest	1704890	-21	systemd-journal	20:31:40	1
391923	99	43	35,6	cyclictest	472362	-21	ntpq	20:25:31	0
391926	99	42	35,5	cyclictest	349801	-21	kworker/u8:0+events_unbound	20:25:37	1
391923	99	42	35,5	cyclictest	468564	-21	kworker/u8:3+flush-8:0	21:35:32	0
391923	99	42	35,4	cyclictest	653220	-21	kworker/u8:2+flush-8:0	23:40:31	0
391930	99	41	30,8	cyclictest	688235	-21	cp	00:05:01	2
391926	99	41	37,3	cyclictest	468564	-21	kworker/u8:3+events_unbound	00:35:40	1
391926	99	41	35,4	cyclictest	642739	-21	kworker/u8:1+events_unbound	00:10:33	1
391926	99	41	35,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	23:10:34	1
391926	99	41	33,6	cyclictest	653220	-21	kworker/u8:2+events_unbound	23:35:23	1
391923	99	41	34,5	cyclictest	518033	-21	kworker/u8:2+flush-8:0	21:30:30	0
391923	99	41	33,5	cyclictest	607048	-21	ntpq	22:40:33	0
391923	99	41	31,8	cyclictest	528779	-21	diskstats	21:25:22	0
391930	99	40	35,4	cyclictest	423831	-21	kworker/u8:1+flush-8:0	19:40:36	2
391926	99	40	35,4	cyclictest	642739	-21	kworker/u8:1+flush-8:0	00:05:30	1
391926	99	40	34,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	00:20:32	1
391923	99	40	35,3	cyclictest	557648	-21	kworker/u8:2+events_unbound	22:00:21	0
391923	99	40	34,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	00:35:37	0
391930	99	39	28,8	cyclictest	1704890	-21	systemd-journal	00:17:00	2
391926	99	39	30,6	cyclictest	573048	-21	/usr/sbin/munin	22:10:38	1
391926	99	38	31,5	cyclictest	468564	-21	kworker/u8:3+events_unbound	21:45:26	1
391930	99	37	32,4	cyclictest	518033	-21	kworker/u8:2+flush-8:0	21:25:31	2
391926	99	37	32,4	cyclictest	468564	-21	kworker/u8:3+events_unbound	22:50:26	1
391926	99	37	29,6	cyclictest	424084	-21	apt-get	19:40:19	1
391923	99	37	33,3	cyclictest	85	50	irq/124-ahci[0000:00:12.0]	23:25:31	0
391923	99	37	28,7	cyclictest	468564	-21	kworker/u8:3+flush-8:0	21:45:31	0
391930	99	36	31,4	cyclictest	642739	-21	kworker/u8:1+events_unbound	00:05:41	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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