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 Tue Aug 18, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
613101	99	48	42,4	cyclictest	335557	-21	systemd-journal	00:20:00	3
613101	99	46	40,4	cyclictest	878336	-21	kworker/u8:3+events_unbound	00:30:22	3
613096	99	41	38,2	cyclictest	608145	-21	kworker/u8:3+flush-259:0	19:45:23	2
613093	99	40	35,3	cyclictest	608145	-21	kworker/u8:3+flush-259:0	19:55:01	1
613090	99	40	33,4	cyclictest	863225	-21	diskstats	23:10:15	0
613101	99	38	33,3	cyclictest	878336	-21	kworker/u8:3+events_unbound	23:50:19	3
613093	99	38	32,4	cyclictest	712534	-21	/usr/sbin/munin	20:45:15	1
613096	99	37	33,3	cyclictest	800458	-21	kworker/u8:3+flush-259:0	22:40:25	2
613096	99	37	33,3	cyclictest	800458	-21	kworker/u8:3+events_unbound	23:00:25	2
613090	99	36	31,3	cyclictest	697026	-21	apt-get	20:30:13	0
613090	99	36	31,3	cyclictest	1	-21	systemd	19:45:00	0
613093	99	35	30,3	cyclictest	335557	-21	systemd-journal	20:01:36	1
613090	99	35	31,3	cyclictest	648899	-21	kworker/u8:1+flush-259:0	19:55:24	0
613101	99	34	31,2	cyclictest	700894	-21	kworker/u8:2+events_unbound	21:00:20	3
613101	99	34	31,2	cyclictest	700894	-21	kworker/u8:2+events_unbound	21:00:19	3
613096	99	34	31,2	cyclictest	920193	-21	kworker/u8:4+flush-259:0	00:05:19	2
613093	99	34	29,4	cyclictest	826635	-21	kworker/u8:0+flush-259:0	22:45:00	1
613101	99	33	27,4	cyclictest	758906	-21	apt-get	21:30:00	3
613096	99	33	29,3	cyclictest	759555	-21	kworker/u8:2+flush-259:0	23:25:17	2
613096	99	33	29,3	cyclictest	759555	-21	kworker/u8:2+flush-259:0	22:25:17	2
613096	99	33	28,3	cyclictest	759555	-21	kworker/u8:2+flush-259:0	22:00:16	2
613096	99	33	27,5	cyclictest	554576	-21	kworker/u8:0+flush-259:0	19:30:01	2
613090	99	33	28,4	cyclictest	654534	-21	gpgv	19:50:01	0
613101	99	32	27,3	cyclictest	686131	-21	kworker/u8:0+flush-259:0	21:15:17	3
613096	99	32	28,3	cyclictest	648899	-21	kworker/u8:1+flush-259:0	20:25:29	2
613096	99	32	26,4	cyclictest	335557	-21	systemd-journal	00:30:21	2
613090	99	32	27,4	cyclictest	888716	-21	gpgv	23:35:00	0
613090	99	31	25,4	cyclictest	613012	-21	latency_hist	19:10:01	0
613101	99	30	27,2	cyclictest	554576	-21	kworker/u8:0+flush-259:0	19:40:01	3
613101	99	30	25,3	cyclictest	769696	-21	kworker/u8:1+flush-259:0	21:45:00	3
613101	99	30	25,3	cyclictest	671016	-21	apt-get	20:05:11	3
613096	99	30	26,3	cyclictest	894431	-21	kworker/u8:4+flush-259:0	23:40:24	2
613096	99	30	26,3	cyclictest	878336	-21	kworker/u8:3+flush-259:0	00:25:20	2
613093	99	30	25,4	cyclictest	648899	-21	kworker/u8:1+flush-259:0	19:45:00	1
613093	99	30	25,3	cyclictest	335557	-21	systemd-journal	23:47:08	1
613093	99	30	19,9	cyclictest	695853	-21	ntpq	20:25:23	1
613101	99	29	25,3	cyclictest	847337	-21	kworker/u8:1+flush-259:0	22:55:24	3
613101	99	29	23,4	cyclictest	722648	-21	latency_hist	20:55:01	3
613096	99	29	25,3	cyclictest	920193	-21	kworker/u8:4+events_unbound	00:18:26	2
613096	99	29	25,3	cyclictest	909492	-21	kworker/u8:0+events_unbound	00:00:25	2
613096	99	29	24,4	cyclictest	608145	-21	kworker/u8:3+events_unbound	20:14:25	2
613096	99	29	23,4	cyclictest	888595	-21	latency_hist	23:35:01	2
613101	99	28	23,3	cyclictest	676229	-21	kworker/u8:4+events_unbound	20:10:15	3
613096	99	28	25,2	cyclictest	878336	-21	kworker/u8:3+events_unbound	23:45:14	2
613096	99	28	24,3	cyclictest	847337	-21	kworker/u8:1+events_unbound	00:20:29	2
613096	99	28	24,3	cyclictest	738415	-21	kworker/u8:4+flush-259:0	21:25:29	2
613096	99	28	24,3	cyclictest	728080	-21	kworker/u8:3+flush-259:0	21:20:25	2
613096	99	28	24,3	cyclictest	706841	-21	kworker/u8:1+events_unbound	21:05:16	2
613096	99	28	24,3	cyclictest	559915	-21	kworker/u8:2+events_unbound	19:10:26	2
613093	99	28	22,4	cyclictest	946159	-21	latency_hist	00:30:01	1
613090	99	28	22,4	cyclictest	919259	-21	ntpq	00:00:19	0
613101	99	27	23,3	cyclictest	759555	-21	kworker/u8:2+events_unbound	23:10:20	3
613096	99	27	24,2	cyclictest	554576	-21	kworker/u8:0+flush-259:0	19:35:25	2
613096	99	27	23,2	cyclictest	728080	-21	kworker/u8:3+events_unbound	21:35:21	2
613096	99	27	21,4	cyclictest	847739	-21	diskstats	22:55:14	2
613096	99	27	20,5	cyclictest	335557	-21	systemd-journal	21:20:00	2
613090	99	27	24,2	cyclictest	759555	-21	kworker/u8:2+flush-259:0	22:00:18	0
613090	99	27	23,3	cyclictest	842390	-21	apt-get	22:50:12	0
613101	99	26	23,2	cyclictest	894150	-21	kworker/u8:2+flush-259:0	23:40:00	3
613101	99	26	23,2	cyclictest	800458	-21	kworker/u8:3+flush-259:0	22:10:19	3
613101	99	26	20,4	cyclictest	711415	-21	ntpq	20:40:21	3
613101	99	26	20,4	cyclictest	665640	-21	base64	20:00:01	3
613101	99	26	20,4	cyclictest	335557	-21	systemd-journal	23:17:00	3
613101	99	26	19,5	cyclictest	335557	-21	systemd-journal	22:25:24	3
613096	99	26	22,3	cyclictest	759555	-21	kworker/u8:2+flush-259:0	23:20:20	2
613096	99	26	22,3	cyclictest	759555	-21	kworker/u8:2+flush-259:0	23:20:20	2
613096	99	26	22,3	cyclictest	759555	-21	kworker/u8:2+events_unbound	22:46:24	2
613096	99	26	22,3	cyclictest	759555	-21	kworker/u8:2+events_unbound	22:30:25	2
613096	99	26	22,3	cyclictest	738415	-21	kworker/u8:4+flush-259:0	21:10:21	2
613096	99	26	22,3	cyclictest	608145	-21	kworker/u8:3+events_unbound	19:44:25	2
613096	99	26	21,4	cyclictest	800458	-21	kworker/u8:3+events_unbound	22:07:26	2
613096	99	26	20,4	cyclictest	727853	-21	latency_hist	21:00:01	2
613090	99	26	20,4	cyclictest	644041	-21	latency_hist	19:40:00	0
613101	99	25	21,3	cyclictest	648899	-21	kworker/u8:1+events_unbound	20:30:20	3
613101	99	25	20,4	cyclictest	769696	-21	kworker/u8:1+flush-259:0	21:45:23	3
613101	99	25	19,4	cyclictest	837396	-21	diskstats	22:45:14	3
613096	99	25	21,3	cyclictest	785210	-21	kworker/u8:3+events_unbound	21:55:25	2
613096	99	25	19,4	cyclictest	676000	-21	latency_hist	20:10:02	2
613093	99	25	22,2	cyclictest	659972	-21	kworker/u8:0+flush-259:0	20:05:18	1
613093	99	25	19,4	cyclictest	795544	-21	latency_hist	22:05:01	1
613101	99	24	20,3	cyclictest	878336	-21	kworker/u8:3+flush-259:0	00:35:25	3
613101	99	24	20,3	cyclictest	559915	-21	kworker/u8:2+flush-259:0	19:20:15	3
613101	99	24	19,4	cyclictest	800458	-21	kworker/u8:3+events_unbound	22:50:22	3
613101	99	24	19,3	cyclictest	681438	-21	/usr/sbin/munin	20:15:21	3
613096	99	24	21,2	cyclictest	847337	-21	kworker/u8:1+events_unbound	00:10:23	2
613096	99	24	20,3	cyclictest	759555	-21	kworker/u8:2+events_unbound	21:45:23	2
613096	99	24	20,3	cyclictest	759555	-21	kworker/u8:2+events_unbound	21:33:26	2
613096	99	24	20,3	cyclictest	559915	-21	kworker/u8:2+events_unbound	19:24:25	2
613096	99	24	19,4	cyclictest	559915	-21	kworker/u8:2+events_unbound	19:57:25	2
613093	99	24	21,2	cyclictest	554576	-21	kworker/u8:0+events_unbound	19:35:18	1
613093	99	24	20,3	cyclictest	816499	-21	apt-get	22:25:13	1
613093	99	24	19,4	cyclictest	775122	-21	apt-get	21:45:13	1
613093	99	24	18,5	cyclictest	0	-21	swapper/1	23:20:00	1
613090	99	24	20,3	cyclictest	847337	-21	kworker/u8:1+flush-259:0	23:19:55	0
613090	99	24	17,5	cyclictest	893348	-21	ntpq	23:35:22	0
613101	99	23	17,4	cyclictest	509	-21	rs:main		3
613096	99	23	21,1	cyclictest	847337	-21	kworker/u8:1+events_unbound	23:05:13	2
613096	99	23	19,3	cyclictest	909757	-21	kworker/u8:5+flush-259:0	23:55:16	2
613093	99	23	19,3	cyclictest	920193	-21	kworker/u8:4+flush-259:0	00:20:00	1
613090	99	23	20,2	cyclictest	800458	-21	kworker/u8:3+flush-259:0	22:35:21	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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