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 Mon Sep 14, 2026 12:44:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2787080	2	189	0,1	sleep3	75	-21	kworker/3:1-events	08:19:08	3
2787080	2	189	0,1	sleep3	75	-21	kworker/3:1-events	08:19:08	3
2719831	99	51	45,4	cyclictest	2940394	-21	kworker/u8:3+events_unbound	12:34:04	1
2719831	99	50	45,4	cyclictest	2876113	-21	kworker/u8:2+flush-8:0	10:34:18	1
2719831	99	50	45,4	cyclictest	2876113	-21	kworker/u8:2+flush-8:0	10:34:18	1
2719831	99	49	43,4	cyclictest	2766288	-21	kworker/u8:1+events_unbound	09:05:00	1
2719831	99	48	41,5	cyclictest	2920377	-21	kworker/u8:1+flush-8:0	11:14:19	1
2719831	99	47	43,3	cyclictest	2846295	-21	kworker/u8:0+flush-8:0	09:49:20	1
2719831	99	47	41,4	cyclictest	2940394	-21	kworker/u8:3+flush-8:0	11:44:21	1
2719827	99	47	36,8	cyclictest	2974853	-21	latency_hist	11:25:00	0
2719827	99	47	25,20	cyclictest	3030356	-21	/usr/sbin/munin	12:24:16	0
2719831	99	45	40,4	cyclictest	2920377	-21	kworker/u8:1+events_unbound	11:30:00	1
2719831	99	45	40,4	cyclictest	2766288	-21	kworker/u8:1+flush-8:0	08:59:13	1
2719831	99	45	40,3	cyclictest	2940394	-21	kworker/u8:3+events_unbound	11:09:19	1
2719831	99	45	38,5	cyclictest	2766288	-21	kworker/u8:1+flush-8:0	09:09:15	1
2719831	99	44	39,4	cyclictest	2876113	-21	kworker/u8:2+flush-8:0	10:25:00	1
2719831	99	44	38,5	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	08:35:01	1
2719827	99	44	20,7	cyclictest	2815988	-21	latency_hist	08:45:01	0
2719833	99	43	38,4	cyclictest	2781320	-21	kworker/u8:2+flush-8:0	08:34:10	2
2719833	99	43	37,4	cyclictest	2974871	-21	gpgv	11:25:00	2
2719831	99	43	38,4	cyclictest	2840959	-21	kworker/u8:2+events_unbound	09:14:05	1
2719831	99	42	36,4	cyclictest	2905488	-21	kworker/u8:3+events_unbound	10:39:05	1
2719831	99	42	35,5	cyclictest	2207307	-21	kworker/u8:0+flush-8:0	08:24:16	1
2719827	99	42	28,12	cyclictest	2916702	-21	irqrtprio	10:29:07	0
2772296	2	41	0,4	sleep0	0	-21	swapper/0	08:04:08	0
2719831	99	41	36,4	cyclictest	2950107	-21	kworker/u8:2+events_unbound	11:04:05	1
2719831	99	41	33,6	cyclictest	2672359	-21	kworker/u8:1+flush-8:0	07:24:20	1
2719827	99	41	28,9	cyclictest	2724653	-21	latency_hist	07:15:00	0
2719827	99	41	22,4	cyclictest	2810808	-21	apt-get	08:40:01	0
2715099	2	41	28,9	sleep1	0	-21	swapper/1	07:06:40	1
2715099	2	41	28,9	sleep1	0	-21	swapper/1	07:06:40	1
2719833	99	40	34,4	cyclictest	2860860	-21	gpgv	09:30:00	2
2719831	99	40	34,5	cyclictest	2876113	-21	kworker/u8:2+flush-8:0	10:49:14	1
2719831	99	40	33,5	cyclictest	2709846	-21	kworker/u8:2+flush-8:0	07:39:18	1
2719827	99	40	31,6	cyclictest	2940013	-21	grep	10:49:20	0
2719827	99	40	21,16	cyclictest	3004640	-21	unixbench_multi	11:54:19	0
2719827	99	40	19,4	cyclictest	2944976	-21	unixbench_multi	10:54:20	0
2719831	99	39	33,5	cyclictest	2207307	-21	kworker/u8:0+flush-8:0	07:19:04	1
2719827	99	39	20,3	cyclictest	2795910	-21	cron	08:24:59	0
2719827	99	39	13,6	cyclictest	576	-21	runrttasks	12:34:02	0
2719831	99	38	33,4	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	09:24:05	1
2719831	99	38	33,4	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	09:24:05	1
2719831	99	38	33,4	cyclictest	2207307	-21	kworker/u8:0+events_unbound	08:00:00	1
2719831	99	38	33,3	cyclictest	2207307	-21	kworker/u8:0+events_unbound	08:09:14	1
2719831	99	38	31,5	cyclictest	2876113	-21	kworker/u8:2+flush-8:0	10:29:18	1
2719831	99	38	31,5	cyclictest	2855836	-21	kworker/u8:2+flush-8:0	09:34:16	1
2719827	99	38	28,8	cyclictest	2975886	-21	diskstats	11:29:06	0
2719827	99	38	18,4	cyclictest	2885713	-21	cron	09:55:00	0
2719827	99	38	17,9	cyclictest	278	-21	systemd-journal	09:00:00	0
2719833	99	37	28,7	cyclictest	3020687	-21	tr	12:14:03	2
2719831	99	37	32,4	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	08:44:19	1
2719831	99	37	31,4	cyclictest	2999866	-21	kworker/u8:2+events_unbound	12:39:21	1
2719831	99	37	29,6	cyclictest	2207307	-21	kworker/u8:0+flush-8:0	08:14:17	1
2719831	99	37	23,5	cyclictest	2940394	-21	kworker/u8:3+events_unbound	11:19:03	1
2719827	99	37	20,3	cyclictest	3024863	-21	idleruntime-cro	12:15:00	0
2719827	99	37	18,2	cyclictest	2871727	-21	fschecks_count	09:44:06	0
2719831	99	36	32,3	cyclictest	2846295	-21	kworker/u8:0+flush-8:0	10:09:03	1
2719831	99	36	30,4	cyclictest	2999866	-21	kworker/u8:2+flush-8:0	12:04:15	1
2719831	99	36	30,4	cyclictest	2935228	-21	kworker/u8:0+events_unbound	10:59:03	1
2719831	99	36	28,6	cyclictest	2905488	-21	kworker/u8:3+flush-8:0	10:44:18	1
2719827	99	36	18,3	cyclictest	0	-21	swapper/0	08:30:01	0
2719827	99	36	16,6	cyclictest	2866477	-21	/usr/sbin/munin	09:39:16	0
2719831	99	35	30,4	cyclictest	2766288	-21	kworker/u8:1+events_unbound	09:29:05	1
2719831	99	35	30,3	cyclictest	2940394	-21	kworker/u8:3+events_unbound	11:24:06	1
2719831	99	35	30,3	cyclictest	278	-21	systemd-journal	12:15:00	1
2719831	99	35	29,4	cyclictest	2940394	-21	kworker/u8:3+flush-8:0	12:24:06	1
2719831	99	35	29,4	cyclictest	2890695	-21	kworker/u8:1+flush-8:0	10:14:10	1
2719831	99	35	26,7	cyclictest	3000377	-21	/usr/sbin/munin	11:54:12	1
2719831	99	35	25,7	cyclictest	2761338	-21	latency_hist	07:50:01	1
2719827	99	35	25,7	cyclictest	278	-21	systemd-journal	11:10:00	0
2715245	2	35	1,6	sleep3	0	-21	swapper/3	07:08:35	3
2715245	2	35	1,6	sleep3	0	-21	swapper/3	07:08:35	3
2719831	99	34	29,4	cyclictest	2940394	-21	kworker/u8:3+events_unbound	10:54:10	1
2719831	99	34	29,4	cyclictest	2672359	-21	kworker/u8:1+flush-8:0	07:14:08	1
2719831	99	34	29,3	cyclictest	2999866	-21	kworker/u8:2+events_unbound	12:29:20	1
2719831	99	34	29,3	cyclictest	2709846	-21	kworker/u8:2+flush-8:0	07:29:18	1
2719831	99	34	28,5	cyclictest	2876113	-21	kworker/u8:2+events_unbound	10:04:21	1
2719831	99	34	28,5	cyclictest	2781320	-21	kworker/u8:2+events_unbound	08:39:06	1
2719831	99	34	27,5	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	09:19:20	1
2719831	99	33	27,5	cyclictest	2940394	-21	kworker/u8:3+flush-8:0	11:39:05	1
2719831	99	33	25,6	cyclictest	2870887	-21	latency_hist	09:40:01	1
2719831	99	32	26,5	cyclictest	2746701	-21	kworker/u8:3+flush-8:0	08:04:14	1
2719827	99	32	27,3	cyclictest	2895537	-21	unixbench_singl	10:04:23	0
2719827	99	32	20,9	cyclictest	278	-21	systemd-journal	12:30:00	0
2719827	99	32	20,9	cyclictest	278	-21	systemd-journal	10:15:00	0
2719833	99	31	23,6	cyclictest	278	-21	systemd-journal	10:10:00	2
2719831	99	31	25,4	cyclictest	2940394	-21	kworker/u8:3+flush-8:0	11:59:10	1
2719831	99	31	25,4	cyclictest	2940394	-21	kworker/u8:3+events_unbound	11:34:04	1
2719831	99	31	24,5	cyclictest	2871134	-21	kworker/u8:3+events_unbound	09:44:22	1
2719831	99	31	20,9	cyclictest	278	-21	systemd-journal	08:30:00	1
2719833	99	30	25,3	cyclictest	2840776	-21	unixbench_multi	09:09:21	2
2719831	99	30	26,3	cyclictest	2781320	-21	kworker/u8:2+events_unbound	08:19:23	1
2719831	99	30	26,3	cyclictest	2781320	-21	kworker/u8:2+events_unbound	08:19:23	1
2719831	99	30	26,3	cyclictest	2764049	-21	kthreadcore	07:54:10	1
2719827	99	30	25,3	cyclictest	2995688	-21	cpuspeed_turbos	11:49:04	0
2719827	99	30	19,9	cyclictest	278	-21	systemd-journal	07:30:00	0
2719598	2	30	2,6	sleep0	0	-21	swapper/0	07:09:32	0
2719598	2	30	2,6	sleep0	0	-21	swapper/0	07:09:32	0
2719833	99	29	19,8	cyclictest	2945113	-21	cron	10:55:00	2
2719831	99	29	24,4	cyclictest	2791212	-21	kworker/u8:3+flush-8:0	08:49:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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