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 Sun Jun 21, 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
2841762	99	86	78,6	cyclictest	2951787	-21	kworker/u8:2+flush-8:0	09:05:36	0
2841762	99	78	72,4	cyclictest	3087243	-21	kworker/u8:1+events_unbound	11:55:37	0
2841762	99	76	65,8	cyclictest	2938299	-21	diskstats	08:45:24	0
2841762	99	74	65,7	cyclictest	3092485	-21	kworker/u8:3+flush-8:0	11:25:36	0
2841764	99	73	67,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:20:01	1
2841762	99	72	67,3	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:50:35	0
2841764	99	65	57,6	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	08:25:37	1
2841764	99	64	60,3	cyclictest	3016836	-21	kworker/u8:2+events_unbound	10:40:38	1
2841764	99	64	58,4	cyclictest	3167017	-21	kworker/u8:0+events_unbound	12:35:35	1
2841762	99	63	58,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:55:37	0
2841762	99	61	57,3	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:15:36	0
2841762	99	61	51,7	cyclictest	2907199	-21	ntpq	08:10:32	0
2841762	99	60	54,4	cyclictest	3062026	-21	kworker/u8:3+flush-8:0	11:00:41	0
2841764	99	59	49,7	cyclictest	3126205	-21	ntpq	11:50:32	1
2841762	99	59	54,4	cyclictest	3137016	-21	kworker/u8:3+flush-8:0	12:30:30	0
2841764	99	58	48,8	cyclictest	2947890	-21	/usr/sbin/munin	08:55:32	1
2841762	99	58	53,3	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	08:30:24	0
2841762	99	58	52,5	cyclictest	3016836	-21	kworker/u8:2+flush-8:0	11:05:41	0
2841764	99	57	53,3	cyclictest	3137016	-21	kworker/u8:3+flush-8:0	12:15:30	1
2841764	99	57	48,7	cyclictest	2893560	-21	/usr/sbin/munin	08:00:36	1
2841764	99	57	46,9	cyclictest	2946743	-21	ntpq	08:50:33	1
2841762	99	57	51,4	cyclictest	3106872	-21	kworker/u8:2+flush-8:0	12:05:34	0
2841762	99	57	51,4	cyclictest	3106872	-21	kworker/u8:2+flush-8:0	12:05:33	0
2841764	99	56	52,3	cyclictest	3161819	-21	kworker/u8:1+flush-8:0	12:30:37	1
2841764	99	56	49,5	cyclictest	3087243	-21	kworker/u8:1+flush-8:0	11:55:36	1
2841762	99	56	52,3	cyclictest	3016836	-21	kworker/u8:2+flush-8:0	10:30:31	0
2841764	99	55	47,7	cyclictest	3011869	-21	kworker/u8:0+flush-8:0	10:00:33	1
2841762	99	55	51,3	cyclictest	2951787	-21	kworker/u8:2+flush-8:0	09:10:38	0
2841762	99	55	50,4	cyclictest	2951787	-21	kworker/u8:2+flush-8:0	09:20:35	0
2841762	99	55	49,4	cyclictest	3016836	-21	kworker/u8:2+flush-8:0	10:20:32	0
2841764	99	54	48,4	cyclictest	3092485	-21	kworker/u8:3+events_unbound	11:30:35	1
2841764	99	54	48,4	cyclictest	2951787	-21	kworker/u8:2+flush-8:0	09:30:21	1
2841762	99	54	47,5	cyclictest	3011869	-21	kworker/u8:0+flush-8:0	10:00:31	0
2841762	99	54	47,5	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	10:45:36	0
2841762	99	54	47,5	cyclictest	2867611	-21	ntpq	07:30:34	0
2841762	99	54	47,5	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:35:37	0
2841762	99	53	48,3	cyclictest	2873721	-21	kworker/u8:1+events_unbound	10:15:24	0
2841762	99	53	47,4	cyclictest	3142151	-21	kworker/u8:0+flush-8:0	12:10:25	0
2841762	99	53	46,5	cyclictest	3076533	-21	kworker/u8:0+flush-8:0	12:00:30	0
2841762	99	53	45,6	cyclictest	3137016	-21	kworker/u8:3+flush-8:0	12:15:33	0
2919040	2	52	0,3	sleep0	20	1	rcuc/0	08:25:28	0
2841762	99	52	46,4	cyclictest	3076533	-21	kworker/u8:0+flush-8:0	11:45:31	0
2841762	99	51	46,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:20:44	0
2841762	99	51	46,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:20:44	0
2841764	99	50	44,5	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	09:50:37	1
2841764	99	50	43,5	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	09:45:37	1
2841762	99	50	44,4	cyclictest	3087243	-21	kworker/u8:1+flush-8:0	11:15:35	0
2841762	99	50	43,5	cyclictest	2825635	-21	kworker/u8:3+flush-8:0	07:25:36	0
2841762	99	50	43,4	cyclictest	3111162	-21	ntpq	11:35:33	0
2841764	99	49	44,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:10:38	1
2841762	99	49	42,4	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	10:50:36	0
2841762	99	49	41,5	cyclictest	3160884	-21	ntpq	12:25:32	0
3082386	2	48	0,3	chrt	0	-21	swapper/0	11:10:22	0
2841764	99	48	42,5	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	08:30:37	1
2841764	99	48	41,5	cyclictest	3011380	-21	ntpq	09:55:36	1
2841764	99	47	42,4	cyclictest	3016836	-21	kworker/u8:2+events_unbound	10:30:37	1
2841764	99	47	42,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:50:41	1
2841762	99	47	43,3	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	10:25:41	0
2841762	99	47	41,4	cyclictest	3087243	-21	kworker/u8:1+events_unbound	11:40:32	0
2841762	99	47	40,5	cyclictest	3092497	-21	/usr/sbin/munin	11:20:39	0
2841762	99	47	38,6	cyclictest	2957558	-21	latency_hist	09:05:00	0
2841772	99	46	39,5	cyclictest	1704890	-21	systemd-journal	11:24:59	2
2841764	99	46	41,4	cyclictest	3037280	-21	kworker/u8:0+flush-8:0	10:35:35	1
2841764	99	46	41,4	cyclictest	2873721	-21	kworker/u8:1+events_unbound	09:25:38	1
2841764	99	46	40,5	cyclictest	3087243	-21	kworker/u8:1+flush-8:0	11:15:35	1
2841764	99	46	40,4	cyclictest	3137016	-21	kworker/u8:3+events_unbound	12:10:39	1
2841764	99	46	40,4	cyclictest	2873721	-21	kworker/u8:1+events_unbound	09:10:26	1
2841764	99	46	33,10	cyclictest	1704890	-21	systemd-journal	11:37:31	1
2841762	99	46	41,3	cyclictest	3106872	-21	kworker/u8:2+flush-8:0	12:20:39	0
2841764	99	45	40,4	cyclictest	2951787	-21	kworker/u8:2+flush-8:0	09:05:38	1
2841764	99	45	38,5	cyclictest	2951787	-21	kworker/u8:2+events_unbound	09:00:31	1
2841764	99	45	33,9	cyclictest	1704890	-21	systemd-journal	11:06:31	1
2841762	99	45	40,3	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	09:45:34	0
2841762	99	45	38,5	cyclictest	3016836	-21	kworker/u8:2+flush-8:0	10:55:31	0
2841772	99	44	39,4	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	08:15:35	2
2841764	99	44	39,3	cyclictest	2873721	-21	kworker/u8:1+events_unbound	10:50:35	1
2841764	99	44	38,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:15:23	1
2841764	99	44	37,5	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:45:36	1
2841764	99	44	33,8	cyclictest	3140993	-21	ntpq	12:05:32	1
2841764	99	44	33,8	cyclictest	3140993	-21	ntpq	12:05:31	1
2841762	99	44	39,4	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	09:50:42	0
2841762	99	44	39,4	cyclictest	2868482	-21	kworker/u8:3+flush-8:0	08:50:37	0
2841762	99	44	36,6	cyclictest	2991527	-21	ntpq	09:35:34	0
2841764	99	43	38,4	cyclictest	2873721	-21	kworker/u8:1+events_unbound	08:10:40	1
2841764	99	43	37,5	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	07:55:44	1
2841764	99	43	37,4	cyclictest	2841637	-21	kworker/u8:0+flush-8:0	08:05:35	1
2841764	99	43	35,6	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	10:25:38	1
2841762	99	43	37,5	cyclictest	2873721	-21	kworker/u8:1+events_unbound	07:40:37	0
2841772	99	42	36,4	cyclictest	2957578	-21	gpgv	09:05:01	2
2841764	99	42	37,4	cyclictest	2825635	-21	kworker/u8:3+events_unbound	07:25:31	1
2841764	99	42	36,4	cyclictest	3011869	-21	kworker/u8:0+flush-8:0	10:10:41	1
2841762	99	42	36,4	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	07:45:28	0
2841762	99	42	32,7	cyclictest	2873472	-21	latency_hist	07:40:00	0
2841764	99	41	38,2	cyclictest	3106872	-21	kworker/u8:2+events_unbound	12:25:38	1
2841764	99	41	36,4	cyclictest	2873721	-21	kworker/u8:1+events_unbound	09:40:21	1
2841764	99	41	35,5	cyclictest	3062026	-21	kworker/u8:3+flush-8:0	11:10:42	1
2841764	99	41	35,4	cyclictest	2873721	-21	kworker/u8:1+flush-8:0	10:45:39	1
2841764	99	41	35,4	cyclictest	2841637	-21	kworker/u8:0+events_unbound	08:20:34	1
2841764	99	41	35,4	cyclictest	2841637	-21	kworker/u8:0+events_unbound	08:20:34	1
2841762	99	41	37,3	cyclictest	3087243	-21	kworker/u8:1+events_unbound	11:50:40	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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