OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun May 03, 2026 00:44:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2614082	99	49	45,3	cyclictest	2781080	-21	kworker/u8:1+events_unbound	21:51:07	1
2614088	99	43	38,3	cyclictest	2807408	-21	kworker/u8:1+flush-259:0	22:40:15	3
2614088	99	42	38,3	cyclictest	2603588	-21	kworker/u8:4+flush-259:0	20:10:20	3
2614076	99	42	35,5	cyclictest	2713880	-21	diskstats	20:45:15	0
2614088	99	41	38,2	cyclictest	2671884	-21	kworker/u8:2+flush-259:0	20:25:21	3
2614088	99	41	38,2	cyclictest	2625263	-21	kworker/u8:2+events_unbound	19:30:16	3
2614076	99	41	38,2	cyclictest	2666541	-21	kworker/u8:1+events_unbound	20:00:24	0
2614076	99	39	36,2	cyclictest	2765941	-21	kworker/u8:0+flush-259:0	21:40:20	0
2614088	99	38	32,4	cyclictest	2760708	-21	cat	21:30:01	3
2614082	99	38	34,2	cyclictest	2666541	-21	kworker/u8:1+events_unbound	20:05:22	1
2614082	99	38	33,3	cyclictest	2724442	-21	apt-get	20:55:11	1
2614076	99	38	35,2	cyclictest	2603588	-21	kworker/u8:4+flush-259:0	19:15:21	0
2614082	99	36	29,5	cyclictest	2889023	-21	ntpq	23:30:19	1
2614088	99	35	33,1	cyclictest	2817511	-21	kworker/u8:2+events_unbound	22:35:24	3
2614088	99	35	32,2	cyclictest	2905880	-21	kworker/u8:0+events_unbound	00:23:05	3
2614088	99	35	32,2	cyclictest	2802021	-21	kworker/u8:2+events_unbound	22:10:16	3
2614088	99	35	32,2	cyclictest	2765941	-21	kworker/u8:0+events_unbound	22:15:16	3
2614082	99	35	29,5	cyclictest	2651549	-21	apt-get	19:45:13	1
2614076	99	35	29,4	cyclictest	2771103	-21	latency_hist	21:40:01	0
2614088	99	34	30,3	cyclictest	2581160	-21	kworker/u8:3+flush-259:0	19:10:21	3
2614082	99	34	31,2	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:55:21	1
2614082	99	34	30,3	cyclictest	2625263	-21	kworker/u8:2+flush-259:0	19:25:21	1
2614076	99	34	30,3	cyclictest	2853750	-21	kworker/u8:0+flush-259:0	23:05:15	0
2614088	99	33	30,2	cyclictest	2853750	-21	kworker/u8:0+events_unbound	23:15:23	3
2614088	99	33	30,2	cyclictest	2749936	-21	kworker/u8:4+flush-259:0	21:35:16	3
2614088	99	33	29,3	cyclictest	2895528	-21	kworker/u8:2+events_unbound	00:10:00	3
2614088	99	33	28,3	cyclictest	2864307	-21	/usr/sbin/munin	23:10:16	3
2614082	99	33	30,2	cyclictest	2807408	-21	kworker/u8:1+flush-259:0	22:25:00	1
2614076	99	33	30,2	cyclictest	2895741	-21	kworker/u8:4+flush-259:0	00:25:17	0
2614076	99	33	29,3	cyclictest	2671884	-21	kworker/u8:2+flush-259:0	20:25:05	0
2614082	99	32	29,2	cyclictest	2666541	-21	kworker/u8:1+flush-259:0	20:00:21	1
2614076	99	32	29,2	cyclictest	2650902	-21	kworker/u8:0+events_unbound	19:50:01	0
2614076	99	32	26,4	cyclictest	2618566	-21	ntpq	19:10:21	0
2614088	99	31	28,2	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:45:21	3
2614088	99	31	27,3	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:40:18	3
2614088	99	31	26,3	cyclictest	2620065	-21	base64	19:15:01	3
2614085	99	31	24,5	cyclictest	2713449	-21	latency_hist	20:45:01	2
2614082	99	31	28,3	cyclictest	2895741	-21	kworker/u8:4+events_unbound	23:56:06	1
2614082	99	31	27,3	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:30:17	1
2614082	99	31	26,4	cyclictest	2629417	-21	ntpq	19:20:22	1
2614076	99	31	27,3	cyclictest	2682182	-21	kworker/u8:0+flush-259:0	20:30:16	0
2614088	99	30	24,4	cyclictest	2666706	-21	latency_hist	20:00:01	3
2614085	99	30	25,3	cyclictest	2817511	-21	kworker/u8:2+flush-259:0	22:25:16	2
2614082	99	30	26,3	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:20:19	1
2614082	99	30	26,3	cyclictest	2603588	-21	kworker/u8:4+events_unbound	19:20:00	1
2614076	99	30	27,2	cyclictest	2905880	-21	kworker/u8:0+flush-259:0	00:10:25	0
2614076	99	30	27,2	cyclictest	2603588	-21	kworker/u8:4+flush-259:0	20:55:17	0
2614076	99	30	27,2	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:50:14	0
2614076	99	30	26,3	cyclictest	2765941	-21	kworker/u8:0+flush-259:0	22:05:24	0
2614076	99	30	26,3	cyclictest	2729356	-21	kworker/u8:3+events_unbound	21:10:23	0
2614088	99	29	26,2	cyclictest	2853750	-21	kworker/u8:0+flush-259:0	23:30:00	3
2614088	99	29	26,2	cyclictest	2603588	-21	kworker/u8:4+events_unbound	19:40:23	3
2614088	99	29	25,3	cyclictest	2905880	-21	kworker/u8:0+flush-259:0	00:17:06	3
2614088	99	29	25,3	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:20:20	3
2614088	99	29	24,4	cyclictest	2687324	-21	latency_hist	20:20:00	3
2614082	99	29	26,2	cyclictest	2895528	-21	kworker/u8:2+flush-259:0	23:45:23	1
2614082	99	29	25,3	cyclictest	2729356	-21	kworker/u8:3+events_unbound	21:14:07	1
2614082	99	29	25,3	cyclictest	2581160	-21	kworker/u8:3+events_unbound	19:42:04	1
2614082	99	29	24,2	cyclictest	2895741	-21	kworker/u8:4+events_unbound	00:30:14	1
2614076	99	29	26,2	cyclictest	2802021	-21	kworker/u8:2+flush-259:0	22:10:21	0
2614076	99	29	26,2	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:50:16	0
2614085	99	28	23,3	cyclictest	2698021	-21	kworker/u8:1+flush-259:0	20:30:05	2
2614082	99	28	25,2	cyclictest	2853750	-21	kworker/u8:0+flush-259:0	23:05:24	1
2614082	99	28	25,2	cyclictest	2682182	-21	kworker/u8:0+events_unbound	20:30:14	1
2614076	99	28	24,3	cyclictest	2895741	-21	kworker/u8:4+events_unbound	00:23:09	0
2614076	99	28	22,5	cyclictest	252	-21	systemd-journal	00:05:00	0
2614088	99	27	23,3	cyclictest	2879620	-21	kworker/u8:3+flush-259:0	23:30:05	3
2614088	99	27	23,3	cyclictest	2729356	-21	kworker/u8:3+events_unbound	21:10:21	3
2614088	99	27	23,3	cyclictest	2555344	-21	kworker/u8:0+flush-259:0	19:25:00	3
2614088	99	27	21,4	cyclictest	2879602	-21	latency_hist	23:25:00	3
2614085	99	27	23,3	cyclictest	2666541	-21	kworker/u8:1+flush-259:0	20:00:25	2
2614082	99	27	24,2	cyclictest	2671884	-21	kworker/u8:2+events_unbound	20:10:13	1
2614082	99	27	24,2	cyclictest	2581160	-21	kworker/u8:3+flush-259:0	19:10:21	1
2614082	99	27	23,3	cyclictest	2640833	-21	apt-get	19:35:12	1
2614082	99	27	22,3	cyclictest	2581160	-21	kworker/u8:3+flush-259:0	19:35:00	1
2614076	99	27	24,2	cyclictest	2625263	-21	kworker/u8:2+events_unbound	19:35:24	0
2614076	99	27	24,2	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:35:23	0
2614076	99	27	23,3	cyclictest	252	-21	systemd-journal	21:50:01	0
2614076	99	27	19,6	cyclictest	2904977	-21	ntpq	23:45:20	0
2614088	99	26	23,2	cyclictest	2895741	-21	kworker/u8:4+flush-259:0	00:25:25	3
2614088	99	26	23,2	cyclictest	2843419	-21	kworker/u8:3+events_unbound	23:03:05	3
2614088	99	26	23,2	cyclictest	2625263	-21	kworker/u8:2+events_unbound	19:37:13	3
2614088	99	26	23,2	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:20:14	3
2614088	99	26	22,3	cyclictest	2682182	-21	kworker/u8:0+events_unbound	20:30:22	3
2614085	99	26	21,3	cyclictest	2671884	-21	kworker/u8:2+flush-259:0	20:10:15	2
2614085	99	26	19,5	cyclictest	252	-21	systemd-journal	21:35:05	2
2614082	99	26	22,3	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:50:24	1
2614082	99	26	22,3	cyclictest	2603588	-21	kworker/u8:4+events_unbound	20:44:07	1
2614076	99	26	23,2	cyclictest	2853750	-21	kworker/u8:0+events_unbound	23:12:05	0
2614076	99	26	23,2	cyclictest	2625263	-21	kworker/u8:2+events_unbound	19:30:22	0
2614076	99	26	21,4	cyclictest	252	-21	systemd-journal	21:30:00	0
2614088	99	25	22,2	cyclictest	2765941	-21	kworker/u8:0+events_unbound	22:05:23	3
2614088	99	25	22,2	cyclictest	2765941	-21	kworker/u8:0+events_unbound	21:40:24	3
2614085	99	25	20,4	cyclictest	2817511	-21	kworker/u8:2+flush-259:0	22:55:17	2
2614082	99	25	22,2	cyclictest	2895741	-21	kworker/u8:4+flush-259:0	00:20:21	1
2614082	99	25	19,4	cyclictest	2878686	-21	ntpq	23:20:20	1
2614076	99	25	22,2	cyclictest	2853750	-21	kworker/u8:0+events_unbound	23:19:06	0
2614076	99	25	21,3	cyclictest	2625263	-21	kworker/u8:2+events_unbound	19:27:05	0
2614088	99	24	22,1	cyclictest	2729356	-21	kworker/u8:3+flush-259:0	21:55:19	3
2614088	99	24	21,2	cyclictest	2807408	-21	kworker/u8:1+flush-259:0	22:20:16	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34