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 Sep 01, 2026 12:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2967885	2	71	0,1	chrt	2967886	-21	basename	12:17:28	0
2794614	2	67	0,3	chrt	2794619	-21	fschecks_time	09:22:32	1
2662874	99	63	45,15	cyclictest	2818622	-21	latency_hist	09:45:01	0
2662874	99	55	38,14	cyclictest	2768994	-21	latency_hist	08:55:01	0
2897271	2	51	0,3	sleep3	575	-21	kworker/3:2+events	11:02:39	3
2662874	99	50	31,17	cyclictest	2893030	-21	latency_hist	11:00:00	0
2662874	99	48	22,23	cyclictest	2933563	-21	diskstats	11:42:32	0
2662874	99	48	22,23	cyclictest	2933563	-21	diskstats	11:42:31	0
2662878	99	47	41,5	cyclictest	2918261	-21	kworker/u8:3+flush-8:0	12:27:28	1
2662878	99	47	41,4	cyclictest	2863098	-21	latency_hist	10:30:01	1
2662878	99	47	41,4	cyclictest	2852427	-21	kworker/u8:1+events_unbound	10:42:35	1
2662874	99	47	38,6	cyclictest	2882878	-21	latency_hist	10:50:00	0
2662878	99	46	41,4	cyclictest	2918261	-21	kworker/u8:3+events_unbound	12:22:46	1
2662878	99	46	40,4	cyclictest	2918261	-21	kworker/u8:3+events_unbound	12:12:31	1
2662878	99	45	41,3	cyclictest	2689277	-21	kworker/u8:0+events_unbound	07:47:46	1
2662878	99	45	39,4	cyclictest	2728963	-21	kworker/u8:2+events_unbound	08:37:46	1
2662878	99	44	40,3	cyclictest	1641982	-21	kworker/u8:1+events_unbound	07:25:01	1
2662878	99	43	39,3	cyclictest	2769229	-21	kworker/u8:2+events_unbound	09:17:43	1
2662878	99	43	39,3	cyclictest	1641982	-21	kworker/u8:1+events_unbound	07:42:46	1
2662878	99	43	35,5	cyclictest	2748950	-21	latency_hist	08:35:01	1
2662874	99	42	0,28	cyclictest	1	-21	systemd	07:28:43	0
2662874	99	41	25,13	cyclictest	2867750	-21	grep	10:32:49	0
2662878	99	40	35,4	cyclictest	2918261	-21	kworker/u8:3+flush-8:0	12:02:32	1
2662878	99	40	34,4	cyclictest	2808942	-21	kworker/u8:0+flush-8:0	09:37:46	1
2662874	99	40	31,7	cyclictest	2877968	-21	latency_hist	10:45:01	0
2662874	99	40	23,14	cyclictest	2808705	-21	systemd-run	09:35:00	0
2662874	99	40	22,15	cyclictest	2674639	-21	latency_hist	07:20:01	0
2662874	99	40	14,23	cyclictest	2967459	-21	latency_hist	12:15:01	0
2662874	99	40	0,24	cyclictest	1	-21	systemd	11:20:53	0
2662880	99	39	27,9	cyclictest	275	-21	systemd-journal	08:40:00	2
2662878	99	39	34,3	cyclictest	2748787	-21	kworker/u8:1+events_unbound	09:12:32	1
2662878	99	39	33,5	cyclictest	2643172	-21	kworker/u8:3+events_unbound	07:12:44	1
2662878	99	39	33,4	cyclictest	2912854	-21	kworker/u8:0+flush-8:0	11:37:34	1
2662878	99	39	33,4	cyclictest	2912854	-21	kworker/u8:0+flush-8:0	11:37:34	1
2662878	99	39	33,4	cyclictest	2898047	-21	kworker/u8:1+events_unbound	11:52:41	1
2662878	99	38	33,4	cyclictest	2937642	-21	kworker/u8:2+events_unbound	11:57:41	1
2662878	99	38	32,4	cyclictest	2842595	-21	kworker/u8:3+flush-8:0	10:52:42	1
2662878	99	38	32,4	cyclictest	2748787	-21	kworker/u8:1+flush-8:0	09:32:44	1
2662878	99	38	31,5	cyclictest	1641982	-21	kworker/u8:1+flush-8:0	07:57:44	1
2662874	99	38	28,8	cyclictest	2733353	-21	ntpq	08:17:40	0
2662878	99	37	32,4	cyclictest	2643172	-21	kworker/u8:3+events_unbound	09:07:40	1
2662878	99	37	31,4	cyclictest	1641982	-21	kworker/u8:1+flush-8:0	08:02:40	1
2662874	99	37	29,5	cyclictest	2982006	-21	grep	12:27:46	0
2662874	99	37	29,5	cyclictest	2943206	-21	apt-get	11:52:28	0
2662874	99	37	28,6	cyclictest	2927916	-21	latency_hist	11:35:01	0
2662874	99	37	19,15	cyclictest	2763588	-21	grep	08:47:48	0
2662878	99	36	32,3	cyclictest	2912854	-21	kworker/u8:0+events_unbound	11:42:32	1
2662878	99	36	32,3	cyclictest	2912854	-21	kworker/u8:0+events_unbound	11:42:32	1
2662878	99	36	29,5	cyclictest	275	-21	systemd-journal	08:14:43	1
2662878	99	36	29,5	cyclictest	2643172	-21	kworker/u8:3+flush-8:0	07:32:33	1
2662874	99	36	19,15	cyclictest	0	-21	swapper/0	08:57:37	0
2662874	99	36	18,15	cyclictest	0	-21	swapper/0	09:22:42	0
2662874	99	36	17,17	cyclictest	0	-21	swapper/0	08:07:48	0
2662874	99	36	16,17	cyclictest	0	-21	swapper/0	11:07:41	0
2662878	99	35	30,3	cyclictest	2754203	-21	kworker/u8:0+events_unbound	08:52:35	1
2662878	99	35	30,3	cyclictest	2748787	-21	kworker/u8:1+flush-8:0	09:47:33	1
2662878	99	35	29,4	cyclictest	2748787	-21	kworker/u8:1+events_unbound	09:02:31	1
2662874	99	35	9,2	cyclictest	0	-21	swapper/0	10:12:32	0
2662874	99	35	29,4	cyclictest	2739516	-21	apt-get	08:27:27	0
2662874	99	35	19,13	cyclictest	0	-21	swapper/0	08:12:43	0
2662874	99	35	17,16	cyclictest	2829494	-21	irqcore	09:57:36	0
2662874	99	35	17,16	cyclictest	2778925	-21	idleruntime-cro	09:05:00	0
2662874	99	35	16,17	cyclictest	0	-21	swapper/0	10:37:39	0
2662874	99	35	16,17	cyclictest	0	-21	swapper/0	08:22:32	0
2662874	99	35	16,16	cyclictest	0	-21	swapper/0	09:07:43	0
2662874	99	35	14,18	cyclictest	0	-21	swapper/0	09:52:37	0
2662874	99	35	1,12	cyclictest	2953093	-21	apt-get	12:02:29	0
2658246	2	35	4,9	sleep1	0	-21	swapper/1	07:07:38	1
2662878	99	34	30,3	cyclictest	2882201	-21	kworker/u8:0+flush-8:0	10:57:43	1
2662878	99	34	29,4	cyclictest	2898047	-21	kworker/u8:1+events_unbound	11:47:36	1
2662878	99	34	29,4	cyclictest	2898047	-21	kworker/u8:1+events_unbound	11:47:36	1
2662878	99	34	28,4	cyclictest	2912854	-21	kworker/u8:0+flush-8:0	11:22:43	1
2662878	99	34	27,5	cyclictest	275	-21	systemd-journal	10:08:51	1
2662874	99	34	27,5	cyclictest	2852427	-21	kworker/u8:1+flush-8:0	10:22:33	0
2662874	99	34	17,15	cyclictest	2918722	-21	tune2fs	11:27:32	0
2662874	99	34	16,15	cyclictest	0	-21	swapper/0	07:52:47	0
2662874	99	34	14,18	cyclictest	2704188	-21	unixbench_singl	07:47:48	0
2662874	99	34	0,9	cyclictest	2928285	-21	sshd	11:36:53	0
2662874	99	34	0,9	cyclictest	2928285	-21	sshd	11:36:53	0
2662878	99	33	28,3	cyclictest	2824187	-21	cpuspeed_turbos	09:52:31	1
2662878	99	33	27,5	cyclictest	1641982	-21	kworker/u8:1+flush-8:0	08:07:36	1
2662878	99	33	27,4	cyclictest	2937642	-21	kworker/u8:2+events_unbound	12:17:36	1
2662878	99	33	27,4	cyclictest	2643172	-21	kworker/u8:3+flush-8:0	08:22:44	1
2662878	99	33	26,5	cyclictest	275	-21	systemd-journal	11:04:53	1
2662874	99	33	2,9	cyclictest	2942086	-21	ntpq	11:47:44	0
2662874	99	33	2,9	cyclictest	2942086	-21	ntpq	11:47:44	0
2662874	99	33	2,11	cyclictest	2883315	-21	apt-get	10:52:27	0
2662874	99	33	1,9	cyclictest	2907385	-21	ntpq	11:12:44	0
2662874	99	33	1,9	cyclictest	2748212	-21	ntpq	08:32:41	0
2662874	99	33	18,13	cyclictest	0	-21	swapper/0	09:46:48	0
2662874	99	33	17,14	cyclictest	0	-21	swapper/0	07:22:46	0
2662874	99	33	16,14	cyclictest	0	-21	swapper/0	08:42:38	0
2662874	99	33	13,18	cyclictest	0	-21	swapper/0	07:40:01	0
2662874	99	33	11,5	cyclictest	2716311	-21	cut	08:02:34	0
2662874	99	33	1,10	cyclictest	2852446	-21	ntpq	10:17:41	0
2662874	99	33	1,10	cyclictest	2713707	-21	/usr/sbin/munin	07:57:45	0
2662880	99	32	22,8	cyclictest	2763817	-21	apt-get	08:50:00	2
2662878	99	32	28,3	cyclictest	2748787	-21	kworker/u8:1+events_unbound	10:02:31	1
2662878	99	32	26,5	cyclictest	2852427	-21	kworker/u8:1+events_unbound	10:32:31	1
2662878	99	32	26,4	cyclictest	2852427	-21	kworker/u8:1+flush-8:0	10:22:37	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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