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 Jun 11, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
992865	2	71	0,1	chrt	992866	-21	timerwakeupswit	10:30:47	1
787081	99	71	64,5	cyclictest	953191	-21	apt-get	09:53:48	0
858830	2	68	0,5	sleep2	37	1	rcuc/2	08:20:27	2
858830	2	68	0,5	sleep2	37	1	rcuc/2	08:20:27	2
1039548	2	67	0,5	chrt	0	-21	swapper/0	11:20:35	0
932332	2	65	0,3	sleep3	75	-21	kworker/3:1+mm_percpu_wq	09:30:42	3
787083	99	62	50,9	cyclictest	1012277	-21	kworker/u8:0+flush-8:0	12:30:31	1
787083	99	59	52,5	cyclictest	988878	-21	kworker/u8:1+events_unbound	11:10:42	1
787083	99	58	51,5	cyclictest	988878	-21	kworker/u8:1+flush-8:0	10:55:42	1
787088	99	57	51,5	cyclictest	829092	-21	kworker/u8:0+events_unbound	09:25:46	2
787083	99	57	52,3	cyclictest	1012277	-21	kworker/u8:0+events_unbound	11:15:41	1
787083	99	57	50,5	cyclictest	829092	-21	kworker/u8:0+flush-8:0	09:00:46	1
787083	99	57	49,6	cyclictest	988878	-21	kworker/u8:1+flush-8:0	11:00:41	1
787083	99	56	51,4	cyclictest	988878	-21	kworker/u8:1+events_unbound	11:25:41	1
787083	99	56	51,3	cyclictest	1072327	-21	kworker/u8:2+flush-8:0	12:15:38	1
787083	99	56	48,6	cyclictest	951208	-21	kworker/u8:4+flush-8:0	10:20:42	1
787083	99	55	50,4	cyclictest	933030	-21	kworker/u8:2+flush-8:0	10:15:40	1
787083	99	55	49,4	cyclictest	1027644	-21	kworker/u8:3+events_unbound	11:40:41	1
787083	99	55	48,5	cyclictest	951208	-21	kworker/u8:4+flush-8:0	10:40:47	1
787083	99	55	48,5	cyclictest	951208	-21	kworker/u8:4+flush-8:0	10:40:47	1
787083	99	54	47,5	cyclictest	1072327	-21	kworker/u8:2+flush-8:0	12:05:40	1
787083	99	54	46,6	cyclictest	1012277	-21	kworker/u8:0+flush-8:0	11:45:42	1
787083	99	54	46,5	cyclictest	811840	-21	kworker/u8:1+events_unbound	07:50:42	1
787083	99	53	48,4	cyclictest	1072327	-21	kworker/u8:2+events_unbound	11:55:45	1
787083	99	53	48,3	cyclictest	933030	-21	kworker/u8:2+events_unbound	10:30:01	1
787083	99	53	47,5	cyclictest	1012277	-21	kworker/u8:0+flush-8:0	12:25:40	1
787083	99	53	47,4	cyclictest	4146504	-21	kworker/u8:4+events_unbound	09:15:42	1
787083	99	52	48,3	cyclictest	988878	-21	kworker/u8:1+events_unbound	11:35:01	1
787083	99	52	47,4	cyclictest	933030	-21	kworker/u8:2+flush-8:0	10:00:45	1
787083	99	52	46,5	cyclictest	933030	-21	kworker/u8:2+events_unbound	09:55:43	1
787083	99	52	41,8	cyclictest	948091	-21	apt-get	09:50:00	1
787088	99	51	46,4	cyclictest	942310	-21	kworker/u8:0+events_unbound	09:40:50	2
787083	99	51	46,3	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	07:30:36	1
787083	99	51	43,6	cyclictest	1081619	-21	kworker/u8:1+events_unbound	12:35:39	1
787081	99	51	41,8	cyclictest	1092308	-21	ntpq	12:10:41	0
787088	99	50	45,4	cyclictest	988878	-21	kworker/u8:1+flush-8:0	11:50:42	2
787083	99	50	44,5	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	08:15:41	1
787083	99	50	44,4	cyclictest	1012277	-21	kworker/u8:0+events_unbound	12:00:30	1
787083	99	49	44,4	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	09:05:31	1
787083	99	49	44,4	cyclictest	4146504	-21	kworker/u8:4+events_unbound	09:30:40	1
787083	99	49	42,5	cyclictest	1012277	-21	kworker/u8:0+flush-8:0	12:10:43	1
787083	99	49	39,7	cyclictest	943159	-21	latency_hist	09:45:01	1
787088	99	48	43,4	cyclictest	1081619	-21	kworker/u8:1+events_unbound	12:00:38	2
787088	99	48	42,4	cyclictest	951208	-21	kworker/u8:4+events_unbound	10:40:36	2
787088	99	48	42,4	cyclictest	951208	-21	kworker/u8:4+events_unbound	10:40:36	2
787083	99	48	43,4	cyclictest	1027644	-21	kworker/u8:3+events_unbound	11:20:41	1
787083	99	48	42,5	cyclictest	434623	-21	kworker/u8:3+flush-8:0	07:15:44	1
787083	99	48	41,6	cyclictest	829092	-21	kworker/u8:0+flush-8:0	08:55:43	1
787088	99	47	42,4	cyclictest	829092	-21	kworker/u8:0+events_unbound	08:45:42	2
787088	99	47	42,3	cyclictest	4146504	-21	kworker/u8:4+events_unbound	07:30:39	2
787083	99	47	42,4	cyclictest	988878	-21	kworker/u8:1+events_unbound	11:50:38	1
787083	99	47	42,4	cyclictest	868122	-21	kworker/u8:2+flush-8:0	08:30:42	1
787081	99	47	1,44	cyclictest	1	-21	systemd	10:17:37	0
787088	99	46	40,4	cyclictest	988878	-21	kworker/u8:1+events_unbound	10:50:42	2
787088	99	45	41,3	cyclictest	4146504	-21	kworker/u8:4+events_unbound	08:50:43	2
787083	99	45	39,4	cyclictest	829092	-21	kworker/u8:0+flush-8:0	08:10:40	1
787088	99	44	40,3	cyclictest	1012277	-21	kworker/u8:0+events_unbound	11:00:48	2
787083	99	44	38,5	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	07:25:45	1
787083	99	44	38,4	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	09:20:41	1
787083	99	44	38,4	cyclictest	1012277	-21	kworker/u8:0+events_unbound	11:05:38	1
787083	99	44	37,5	cyclictest	4146504	-21	kworker/u8:4+events_unbound	07:35:43	1
787083	99	44	30,9	cyclictest	1704890	-21	systemd-journal	10:45:36	1
787081	99	44	38,4	cyclictest	434623	-21	kworker/u8:3+events_unbound	07:30:47	0
787088	99	43	39,3	cyclictest	868122	-21	kworker/u8:2+flush-8:0	08:35:48	2
787083	99	43	38,4	cyclictest	4146504	-21	kworker/u8:4+flush-8:0	09:10:43	1
787081	99	43	33,8	cyclictest	1058888	-21	diskstats	11:40:32	0
787088	99	42	38,3	cyclictest	1072327	-21	kworker/u8:2+events_unbound	12:05:01	2
787088	99	42	36,4	cyclictest	4146504	-21	kworker/u8:4+events_unbound	07:20:42	2
787083	99	42	37,4	cyclictest	988878	-21	kworker/u8:1+events_unbound	10:35:46	1
787083	99	42	30,8	cyclictest	1058109	-21	latency_hist	11:40:00	1
787083	99	41	35,5	cyclictest	811840	-21	kworker/u8:1+events_unbound	08:25:00	1
787083	99	41	35,5	cyclictest	811840	-21	kworker/u8:1+events_unbound	08:24:59	1
787083	99	41	35,4	cyclictest	829092	-21	kworker/u8:0+events_unbound	07:55:47	1
787081	99	41	33,6	cyclictest	1078393	-21	apt-get	12:00:26	0
787083	99	40	34,4	cyclictest	951208	-21	kworker/u8:4+events_unbound	10:10:45	1
787083	99	40	34,4	cyclictest	4146504	-21	kworker/u8:4+events_unbound	09:35:37	1
787083	99	40	33,6	cyclictest	1012277	-21	kworker/u8:0+events_unbound	12:20:44	1
787083	99	40	33,5	cyclictest	829092	-21	kworker/u8:0+flush-8:0	08:25:44	1
787083	99	39	35,3	cyclictest	792083	-21	kworker/u8:0+events_unbound	07:25:00	1
787083	99	39	33,4	cyclictest	887956	-21	kworker/u8:1+flush-8:0	08:50:47	1
787081	99	39	1,36	cyclictest	1013196	-21	munin-run	10:55:01	0
977630	2	38	0,6	sleep2	0	-21	swapper/2	10:15:44	2
787088	99	38	33,4	cyclictest	887956	-21	kworker/u8:1+events_unbound	09:35:41	2
787083	99	38	33,3	cyclictest	868122	-21	kworker/u8:2+events_unbound	08:35:36	1
787081	99	38	30,5	cyclictest	798866	-21	latency_hist	07:20:01	0
787081	99	38	29,7	cyclictest	823050	-21	ntpq	07:40:41	0
787081	99	38	28,8	cyclictest	804370	-21	diskstats	07:25:30	0
787088	99	37	33,3	cyclictest	868122	-21	kworker/u8:2+events_unbound	08:34:38	2
787083	99	37	30,5	cyclictest	811840	-21	kworker/u8:1+flush-8:0	07:40:41	1
787088	99	36	31,4	cyclictest	829092	-21	kworker/u8:0+events_unbound	07:50:36	2
787083	99	36	31,3	cyclictest	933030	-21	kworker/u8:2+events_unbound	09:50:48	1
787083	99	36	29,5	cyclictest	829092	-21	kworker/u8:0+flush-8:0	08:05:38	1
787088	99	35	30,3	cyclictest	988878	-21	kworker/u8:1+events_unbound	10:35:32	2
787083	99	35	31,3	cyclictest	868122	-21	kworker/u8:2+events_unbound	08:40:49	1
787083	99	35	30,3	cyclictest	988878	-21	kworker/u8:1+events_unbound	10:55:02	1
787088	99	34	30,3	cyclictest	4146504	-21	kworker/u8:4+events_unbound	09:20:43	2
787083	99	34	30,3	cyclictest	4146504	-21	kworker/u8:4+events_unbound	07:10:33	1
787081	99	34	29,4	cyclictest	434623	-21	kworker/u8:3+events_unbound	07:10:48	0
787081	99	34	28,4	cyclictest	1012277	-21	kworker/u8:0+flush-8:0	11:06:31	0
787081	99	34	27,5	cyclictest	963016	-21	grep	10:00:47	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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