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 Wed Aug 12, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2452200	99	80	75,4	cyclictest	75	-21	kswapd0	00:35:02	3
2452189	99	46	42,3	cyclictest	2452391	-21	kworker/u8:3+flush-259:0	19:20:22	0
2452189	99	46	39,5	cyclictest	2535717	-21	latency_hist	20:30:00	0
2452194	99	41	35,4	cyclictest	2608473	-21	latency_hist	21:39:59	1
2452197	99	38	32,4	cyclictest	2676109	-21	latency_hist	22:45:01	2
2452197	99	37	31,4	cyclictest	335557	-21	systemd-journal	22:33:46	2
2452194	99	37	34,2	cyclictest	75	-21	kswapd0	00:35:03	1
2452189	99	37	30,5	cyclictest	2775646	-21	diskstats	00:20:14	0
2452189	99	37	30,5	cyclictest	2503436	-21	ntpq	19:55:22	0
2452200	99	36	30,4	cyclictest	2685999	-21	ntpq	22:50:22	3
2452197	99	36	29,5	cyclictest	2462490	-21	latency_hist	19:20:02	2
2452194	99	36	33,2	cyclictest	2676135	-21	kworker/u8:2+flush-259:0	22:55:21	1
2452194	99	36	30,4	cyclictest	2623984	-21	http	21:55:00	1
2452189	99	36	31,3	cyclictest	335557	-21	systemd-journal	21:20:48	0
2452189	99	35	29,4	cyclictest	2452391	-21	kworker/u8:3+flush-259:0	19:15:20	0
2452200	99	34	29,3	cyclictest	2468325	-21	kworker/u8:4+flush-259:0	20:40:15	3
2452189	99	34	28,4	cyclictest	2702632	-21	/usr/sbin/munin	23:10:21	0
2452189	99	33	27,4	cyclictest	2509572	-21	kworker/u8:2+flush-259:0	20:20:17	0
2452194	99	32	29,2	cyclictest	2644853	-21	kworker/u8:3+events_unbound	22:25:12	1
2452194	99	32	28,2	cyclictest	2670836	-21	kworker/u8:1+flush-259:0	22:50:25	1
2452194	99	32	27,3	cyclictest	2577230	-21	/usr/sbin/munin	21:10:15	1
2452197	99	31	24,4	cyclictest	2473294	-21	latency_hist	19:30:01	2
2452189	99	31	26,3	cyclictest	2468325	-21	kworker/u8:4+flush-259:0	20:00:20	0
2452189	99	31	26,3	cyclictest	1	-21	systemd	21:20:01	0
2452194	99	30	27,2	cyclictest	2676343	-21	kworker/u8:4+flush-259:0	23:15:25	1
2452189	99	30	27,2	cyclictest	75	-21	kswapd0	00:35:02	0
2452189	99	30	22,5	cyclictest	2639917	-21	latency_hist	22:10:00	0
2452200	99	29	25,3	cyclictest	2602960	-21	kworker/u8:2+flush-259:0	21:50:55	3
2452200	99	29	24,4	cyclictest	2692303	-21	apt-get	23:00:10	3
2452200	99	29	23,5	cyclictest	2525232	-21	kworker/u8:1+flush-259:0	20:50:15	3
2452194	99	29	26,2	cyclictest	2644853	-21	kworker/u8:3+flush-259:0	22:15:14	1
2452194	99	29	26,2	cyclictest	2468325	-21	kworker/u8:4+flush-259:0	20:35:19	1
2452194	99	29	26,2	cyclictest	2452391	-21	kworker/u8:3+flush-259:0	19:15:25	1
2452194	99	29	23,4	cyclictest	335557	-21	systemd-journal	21:08:45	1
2452200	99	28	25,2	cyclictest	2525232	-21	kworker/u8:1+flush-259:0	21:10:26	3
2452200	99	28	25,2	cyclictest	2525232	-21	kworker/u8:1+events_unbound	21:00:19	3
2452200	99	28	24,2	cyclictest	2525232	-21	kworker/u8:1+events_unbound	21:30:20	3
2452194	99	28	25,2	cyclictest	2468325	-21	kworker/u8:4+events_unbound	20:52:46	1
2452194	99	28	22,5	cyclictest	2727302	-21	ntpq	23:30:20	1
2452200	99	27	21,4	cyclictest	335557	-21	systemd-journal	20:00:01	3
2452200	99	27	21,4	cyclictest	2494392	-21	diskstats	19:50:11	3
2452197	99	27	22,4	cyclictest	2764474	-21	kworker/u8:0+flush-259:0	00:15:17	2
2452197	99	27	22,3	cyclictest	335557	-21	systemd-journal	19:30:30	2
2452194	99	27	25,1	cyclictest	2707754	-21	kworker/u8:1+events_unbound	23:45:22	1
2452194	99	27	25,1	cyclictest	2602960	-21	kworker/u8:2+events_unbound	21:31:45	1
2452194	99	27	24,2	cyclictest	2468325	-21	kworker/u8:4+events_unbound	19:30:30	1
2452194	99	27	23,3	cyclictest	2707754	-21	kworker/u8:1+events_unbound	23:24:56	1
2452197	99	26	21,3	cyclictest	335557	-21	systemd-journal	23:41:17	2
2452197	99	26	20,4	cyclictest	2488800	-21	latency_hist	19:45:01	2
2452197	99	26	19,4	cyclictest	2598154	-21	latency_hist	21:30:01	2
2452194	99	26	22,3	cyclictest	335557	-21	systemd-journal	23:50:56	1
2452194	99	26	22,3	cyclictest	2602960	-21	kworker/u8:2+events_unbound	22:00:24	1
2452194	99	26	22,3	cyclictest	2525232	-21	kworker/u8:1+flush-259:0	21:20:25	1
2452194	99	26	20,4	cyclictest	2655498	-21	latency_hist	22:25:01	1
2452189	99	26	22,3	cyclictest	2468325	-21	kworker/u8:4+flush-259:0	19:45:16	0
2452189	99	26	21,4	cyclictest	2655540	-21	kworker/u8:0+flush-259:0	22:30:26	0
2452200	99	25	22,2	cyclictest	2655540	-21	kworker/u8:0+flush-259:0	22:40:15	3
2452200	99	25	21,3	cyclictest	2525232	-21	kworker/u8:1+flush-259:0	22:05:22	3
2452200	99	25	0,24	cyclictest	1	-21	systemd	21:25:01	3
2452197	99	25	20,3	cyclictest	335557	-21	systemd-journal	23:58:57	2
2452197	99	25	19,4	cyclictest	2785572	-21	latency_hist	00:30:00	2
2452194	99	25	22,2	cyclictest	2452391	-21	kworker/u8:3+flush-259:0	19:25:12	1
2452194	99	25	21,3	cyclictest	2452391	-21	kworker/u8:3+events_unbound	19:20:29	1
2452194	99	25	19,4	cyclictest	2525339	-21	latency_hist	20:20:00	1
2452189	99	25	18,5	cyclictest	2790766	-21	apt-key	00:35:00	0
2452189	99	25	17,6	cyclictest	2701545	-21	ntpq	23:05:25	0
2452200	99	24	21,2	cyclictest	509	-21	rs:main		3
2452200	99	24	20,3	cyclictest	2525232	-21	kworker/u8:1+flush-259:0	20:55:45	3
2452194	99	24	21,2	cyclictest	2629202	-21	sshd	21:55:46	1
2452194	99	24	21,2	cyclictest	2525232	-21	kworker/u8:1+events_unbound	21:25:24	1
2452194	99	24	21,2	cyclictest	2468325	-21	kworker/u8:4+flush-259:0	19:40:17	1
2452194	99	24	19,4	cyclictest	2613632	-21	latency_hist	21:45:00	1
2452189	99	24	17,5	cyclictest	2478752	-21	apt-get	19:35:12	0
2452200	99	23	19,3	cyclictest	2676135	-21	kworker/u8:2+events_unbound	22:55:18	3
2452197	99	23	18,3	cyclictest	507	-21	in:imuxsock	21:15:00	2
2452194	99	23	20,2	cyclictest	2676343	-21	kworker/u8:4+events_unbound	22:45:24	1
2452194	99	23	20,2	cyclictest	2488816	-21	kworker/u8:1+events_unbound	19:55:35	1
2452194	99	23	19,3	cyclictest	2666048	-21	apt-get	22:35:12	1
2452194	99	23	18,4	cyclictest	2723273	-21	kworker/u8:3+events_unbound	00:29:03	1
2452194	99	23	18,4	cyclictest	2640155	-21	/usr/sbin/munin	22:10:14	1
2452189	99	23	17,4	cyclictest	335557	-21	systemd-journal	20:14:59	0
2452189	99	23	16,5	cyclictest	2758457	-21	ntpq	00:00:23	0
2452200	99	22	20,1	cyclictest	2452391	-21	kworker/u8:3+flush-259:0	19:40:20	3
2452200	99	22	19,2	cyclictest	2707754	-21	kworker/u8:1+flush-259:0	00:09:59	3
2452200	99	22	18,3	cyclictest	2707754	-21	kworker/u8:1+events_unbound	00:21:27	3
2452200	99	22	18,3	cyclictest	2399053	-21	kworker/u8:0+events_unbound	19:33:12	3
2452197	99	22	12,9	cyclictest	335557	-21	systemd-journal	21:35:44	2
2452194	99	22	19,2	cyclictest	2723273	-21	kworker/u8:3+flush-259:0	00:30:23	1
2452194	99	22	18,3	cyclictest	2535985	-21	apt-get	20:30:13	1
2452194	99	22	17,4	cyclictest	2753806	-21	kworker/u8:2+events_unbound	00:01:24	1
2452194	99	22	17,3	cyclictest	509	-21	rs:main		1
2452189	99	22	17,3	cyclictest	2670836	-21	kworker/u8:1+flush-259:0	22:40:00	0
2452189	99	22	16,4	cyclictest	335557	-21	systemd-journal	00:27:03	0
2452200	99	21	18,2	cyclictest	2655540	-21	kworker/u8:0+flush-259:0	22:35:00	3
2452200	99	21	17,3	cyclictest	2780375	-21	kworker/u8:0+events_unbound	00:26:26	3
2452200	99	21	17,3	cyclictest	2468325	-21	kworker/u8:4+events_unbound	20:45:44	3
2452200	99	21	15,4	cyclictest	2540897	-21	latency_hist	20:35:00	3
2452197	99	21	15,4	cyclictest	2687125	-21	/usr/sbin/munin	22:55:14	2
2452194	99	21	18,2	cyclictest	2723273	-21	kworker/u8:3+events_unbound	00:19:04	1
2452194	99	21	18,2	cyclictest	2525232	-21	kworker/u8:1+events_unbound	22:05:59	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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