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
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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 Fri Nov 28, 2025 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
386056	2	61	0,2	chrt	48	1	ktimers/3	19:31:17	3
361162	99	60	55,4	cyclictest	350747	-21	kworker/u8:0+events_unbound	19:46:08	1
361162	99	60	54,3	cyclictest	3723740	-21	kworker/u8:3+events_unbound	19:31:26	1
361162	99	60	52,6	cyclictest	467360	-21	kworker/u8:0+events_unbound	21:16:22	1
361168	99	59	52,4	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:36:20	2
361168	99	58	52,4	cyclictest	467360	-21	kworker/u8:0+events_unbound	22:56:26	2
361168	99	58	52,4	cyclictest	407596	-21	kworker/u8:2+events_unbound	20:01:19	2
361162	99	58	51,5	cyclictest	622335	-21	kworker/u8:1+events_unbound	00:31:31	1
361168	99	57	51,4	cyclictest	664244	-21	kworker/u8:0+flush-8:0	00:11:28	2
361162	99	57	53,3	cyclictest	636484	-21	kworker/u8:0+flush-8:0	23:51:29	1
361168	99	56	51,4	cyclictest	622335	-21	kworker/u8:1+flush-8:0	00:31:27	2
361168	99	56	51,4	cyclictest	467360	-21	kworker/u8:0+flush-8:0	21:16:25	2
361168	99	54	49,4	cyclictest	492011	-21	kworker/u8:2+flush-8:0	22:06:26	2
361162	99	54	50,3	cyclictest	622335	-21	kworker/u8:1+events_unbound	00:06:13	1
361162	99	54	46,6	cyclictest	350747	-21	kworker/u8:0+events_unbound	19:16:24	1
361162	99	54	44,8	cyclictest	561686	-21	ntpq	22:26:23	1
361162	99	54	43,8	cyclictest	621232	-21	ntpq	23:26:21	1
361168	99	53	48,3	cyclictest	622335	-21	kworker/u8:1+events_unbound	23:46:26	2
361162	99	53	49,3	cyclictest	383146	-21	kworker/u8:1+flush-8:0	20:11:28	1
361162	99	53	46,4	cyclictest	487572	-21	latency_hist	21:15:01	1
361162	99	53	38,11	cyclictest	282	-21	systemd-journal	22:56:30	1
361168	99	52	46,4	cyclictest	467360	-21	kworker/u8:0+flush-8:0	23:21:23	2
361162	99	52	48,3	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:36:28	1
361168	99	51	46,4	cyclictest	636484	-21	kworker/u8:0+events_unbound	23:56:24	2
361162	99	51	47,3	cyclictest	517229	-21	kworker/u8:1+events_unbound	22:41:14	1
361162	99	51	47,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	22:06:30	1
361162	99	51	47,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	21:36:28	1
361162	99	51	47,3	cyclictest	467360	-21	kworker/u8:0+events_unbound	23:16:11	1
361162	99	51	47,3	cyclictest	467360	-21	kworker/u8:0+events_unbound	23:16:11	1
361162	99	51	47,3	cyclictest	3723740	-21	kworker/u8:3+flush-8:0	20:51:30	1
361162	99	51	47,3	cyclictest	350747	-21	kworker/u8:0+events_unbound	20:21:24	1
361162	99	51	45,4	cyclictest	477409	-21	kworker/u8:1+events_unbound	21:06:14	1
361168	99	50	45,4	cyclictest	350747	-21	kworker/u8:0+flush-8:0	19:51:30	2
361162	99	50	46,3	cyclictest	602004	-21	kworker/u8:3+events_unbound	00:16:23	1
361162	99	50	46,3	cyclictest	467360	-21	kworker/u8:0+flush-8:0	22:46:27	1
361162	99	50	44,5	cyclictest	350747	-21	kworker/u8:0+events_unbound	19:26:24	1
361162	99	50	39,8	cyclictest	406996	-21	ntpq	19:51:23	1
361155	99	50	46,3	cyclictest	3723740	-21	kworker/u8:3+flush-8:0	19:21:31	0
361162	99	49	44,3	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:11:22	1
361162	99	49	44,3	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:11:22	1
361162	99	49	40,7	cyclictest	282	-21	systemd-journal	20:03:22	1
361168	99	48	43,4	cyclictest	622335	-21	kworker/u8:1+events_unbound	00:36:23	2
361162	99	48	36,8	cyclictest	282	-21	systemd-journal	20:10:00	1
361155	99	48	43,3	cyclictest	3723740	-21	kworker/u8:3+events_unbound	19:11:17	0
361168	99	47	41,4	cyclictest	467360	-21	kworker/u8:0+flush-8:0	22:01:22	2
361168	99	47	41,4	cyclictest	467360	-21	kworker/u8:0+flush-8:0	22:01:22	2
361162	99	47	43,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	22:21:27	1
361162	99	47	41,4	cyclictest	477409	-21	kworker/u8:1+events_unbound	21:26:25	1
361162	99	47	35,9	cyclictest	496701	-21	ntpq	21:21:23	1
361155	99	47	37,7	cyclictest	611327	-21	ntpq	23:16:22	0
361155	99	47	37,7	cyclictest	611327	-21	ntpq	23:16:22	0
361162	99	45	41,3	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:31:23	1
361155	99	45	39,4	cyclictest	3723740	-21	kworker/u8:3+flush-8:0	20:46:26	0
361155	99	45	38,5	cyclictest	632625	-21	diskstats	23:41:12	0
361155	99	45	36,7	cyclictest	576733	-21	ntpq	22:41:21	0
361155	99	45	36,6	cyclictest	383146	-21	kworker/u8:1+flush-8:0	20:11:21	0
361162	99	44	40,3	cyclictest	585377	-21	kworker/u8:2+events_unbound	23:06:21	1
361162	99	44	40,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	22:16:26	1
361155	99	44	39,3	cyclictest	350747	-21	kworker/u8:0+flush-8:0	19:20:01	0
361162	99	43	39,3	cyclictest	676368	-21	kworker/u8:3+events_unbound	00:26:28	1
361162	99	43	39,3	cyclictest	517229	-21	kworker/u8:1+flush-8:0	22:31:13	1
361162	99	43	38,4	cyclictest	622335	-21	kworker/u8:1+flush-8:0	00:01:16	1
361168	99	42	37,4	cyclictest	592110	-21	kworker/u8:1+flush-8:0	23:01:22	2
361162	99	42	38,3	cyclictest	567152	-21	kworker/u8:2+events_unbound	22:36:23	1
361162	99	42	38,3	cyclictest	517229	-21	kworker/u8:1+events_unbound	22:11:20	1
361162	99	41	37,3	cyclictest	622335	-21	kworker/u8:1+flush-8:0	00:21:24	1
361162	99	41	36,4	cyclictest	350747	-21	kworker/u8:0+events_unbound	20:26:21	1
361162	99	41	30,8	cyclictest	397029	-21	ntpq	19:41:23	1
361162	99	41	26,11	cyclictest	282	-21	systemd-journal	23:23:31	1
361162	99	40	36,3	cyclictest	622335	-21	kworker/u8:1+flush-8:0	23:41:13	1
361162	99	40	36,3	cyclictest	3723740	-21	kworker/u8:3+flush-8:0	19:11:28	1
361162	99	40	36,3	cyclictest	350747	-21	kworker/u8:0+events_unbound	19:56:24	1
361162	99	40	35,4	cyclictest	636484	-21	kworker/u8:0+events_unbound	23:56:30	1
361162	99	39	35,3	cyclictest	517229	-21	kworker/u8:1+flush-8:0	21:51:18	1
361155	99	39	35,3	cyclictest	585377	-21	kworker/u8:2+flush-8:0	23:31:26	0
361155	99	39	35,3	cyclictest	383146	-21	kworker/u8:1+flush-8:0	20:06:26	0
361162	99	38	34,3	cyclictest	467360	-21	kworker/u8:0+flush-8:0	21:41:12	1
361162	99	38	34,3	cyclictest	383146	-21	kworker/u8:1+events_unbound	20:41:14	1
361162	99	38	34,3	cyclictest	383146	-21	kworker/u8:1+events_unbound	20:36:28	1
361162	99	38	33,4	cyclictest	350747	-21	kworker/u8:0+events_unbound	19:21:13	1
361155	99	38	31,5	cyclictest	382042	-21	ntpq	19:26:20	0
361155	99	38	29,7	cyclictest	282	-21	systemd-journal	22:10:00	0
356209	2	38	4,9	sleep1	0	-21	swapper/1	19:05:19	1
361168	99	37	29,5	cyclictest	477409	-21	kworker/u8:1+events_unbound	21:26:13	2
361162	99	37	33,3	cyclictest	517229	-21	kworker/u8:1+flush-8:0	21:46:12	1
361162	99	37	33,3	cyclictest	383146	-21	kworker/u8:1+flush-8:0	20:16:22	1
361162	99	37	30,5	cyclictest	492011	-21	kworker/u8:2+events_unbound	21:35:00	1
361162	99	36	32,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	21:56:31	1
361162	99	36	32,3	cyclictest	492011	-21	kworker/u8:2+flush-8:0	21:56:30	1
361162	99	36	32,3	cyclictest	3723740	-21	kworker/u8:3+events_unbound	20:48:33	1
361155	99	36	31,3	cyclictest	3723740	-21	kworker/u8:3+flush-8:0	20:51:02	0
361155	99	36	30,4	cyclictest	622335	-21	kworker/u8:1+events_unbound	00:21:26	0
361155	99	36	30,4	cyclictest	477409	-21	kworker/u8:1+events_unbound	21:21:21	0
361168	99	35	8,13	cyclictest	569892	-21	cat	22:36:18	2
361168	99	35	28,5	cyclictest	413023	-21	cat	20:00:01	2
361162	99	35	30,4	cyclictest	447527	-21	kworker/u8:2+flush-8:0	20:56:12	1
361155	99	35	30,3	cyclictest	517229	-21	kworker/u8:1+flush-8:0	22:36:18	0
361155	99	35	29,4	cyclictest	350747	-21	kworker/u8:0+flush-8:0	19:51:15	0
361155	99	35	28,5	cyclictest	517229	-21	kworker/u8:1+events_unbound	22:46:28	0
361168	99	34	7,16	cyclictest	426399	-21	cut	20:11:18	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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