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 Jan 25, 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
3052852	99	47	44,2	cyclictest	3353381	-21	kworker/u8:1+events_unbound	00:25:19	1
3052852	99	47	44,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:35:24	1
3052854	99	43	40,2	cyclictest	3142173	-21	kworker/u8:2+events_unbound	21:05:01	2
3052859	99	42	37,4	cyclictest	3197665	-21	kworker/u8:3+flush-259:0	22:30:16	3
3052852	99	42	39,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:30:13	1
3052854	99	41	38,2	cyclictest	3233817	-21	kworker/u8:0+events_unbound	22:55:28	2
3052854	99	41	38,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	22:30:21	2
3052852	99	40	37,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:00:24	1
3052852	99	40	36,3	cyclictest	3233817	-21	kworker/u8:0+events_unbound	22:20:15	1
3052859	99	39	32,4	cyclictest	509	-21	rs:main		3
3052854	99	39	36,2	cyclictest	3306543	-21	kworker/u8:2+events_unbound	23:25:26	2
3052854	99	39	36,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	22:45:14	2
3052854	99	39	36,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:00:18	2
3052854	99	39	35,3	cyclictest	3009787	-21	kworker/u8:0+events_unbound	19:10:18	2
3052852	99	39	35,2	cyclictest	3218574	-21	kworker/u8:2+events_unbound	22:15:16	1
3052848	99	39	31,5	cyclictest	3394662	-21	latency_hist	00:40:01	0
3052859	99	38	32,4	cyclictest	252	-21	systemd-journal	23:25:02	3
3052852	99	38	35,2	cyclictest	3368817	-21	kworker/u8:2+events_unbound	00:30:16	1
3052852	99	38	35,2	cyclictest	3120635	-21	kworker/u8:3+events_unbound	21:15:28	1
3052852	99	38	34,3	cyclictest	3142173	-21	kworker/u8:2+events_unbound	21:00:19	1
3052848	99	38	32,4	cyclictest	3151513	-21	latency_hist	20:45:01	0
3052848	99	38	31,5	cyclictest	252	-21	systemd-journal	22:00:01	0
3052848	99	38	31,5	cyclictest	252	-21	systemd-journal	22:00:00	0
3052854	99	37	34,2	cyclictest	3353381	-21	kworker/u8:1+events_unbound	00:00:23	2
3052854	99	37	34,2	cyclictest	3218574	-21	kworker/u8:2+events_unbound	22:01:29	2
3052854	99	37	34,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:51:28	2
3052852	99	37	34,2	cyclictest	3187506	-21	kworker/u8:0+events_unbound	21:47:41	1
3052859	99	36	31,3	cyclictest	3270852	-21	apt-get	22:40:12	3
3052859	99	36	28,5	cyclictest	3072512	-21	ntpq	19:25:21	3
3052854	99	36	34,1	cyclictest	3142173	-21	kworker/u8:2+events_unbound	21:10:13	2
3052854	99	36	33,2	cyclictest	3156650	-21	kworker/u8:0+events_unbound	20:50:28	2
3052854	99	36	33,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	19:50:28	2
3052854	99	36	33,2	cyclictest	3032481	-21	kworker/u8:1+events_unbound	19:20:13	2
3052854	99	36	32,3	cyclictest	3353381	-21	kworker/u8:1+events_unbound	00:25:29	2
3052852	99	36	33,2	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:41:27	1
3052852	99	36	33,2	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:41:27	1
3052852	99	36	30,4	cyclictest	3260231	-21	base64	22:30:01	1
3052848	99	36	30,4	cyclictest	3265715	-21	apt-get	22:35:12	0
3052854	99	35	32,2	cyclictest	3327567	-21	kworker/u8:0+events_unbound	23:45:25	2
3052854	99	35	32,2	cyclictest	3306543	-21	kworker/u8:2+events_unbound	23:24:28	2
3052854	99	35	32,2	cyclictest	3120635	-21	kworker/u8:3+events_unbound	20:55:21	2
3052854	99	35	32,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:32:27	2
3052854	99	35	32,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:10:13	2
3052852	99	35	32,2	cyclictest	3218574	-21	kworker/u8:2+events_unbound	22:02:44	1
3052852	99	35	32,2	cyclictest	3120635	-21	kworker/u8:3+events_unbound	20:45:28	1
3052852	99	35	31,3	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:38:28	1
3052852	99	35	30,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	22:05:13	1
3052859	99	34	29,4	cyclictest	3316825	-21	gpgv	23:25:00	3
3052854	99	34	30,3	cyclictest	3177225	-21	kworker/u8:1+events_unbound	21:27:36	2
3052854	99	34	30,3	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:35:29	2
3052852	99	34	31,2	cyclictest	3353383	-21	kworker/u8:4+events_unbound	00:02:26	1
3052848	99	34	26,5	cyclictest	3353354	-21	latency_hist	00:00:00	0
3052854	99	33	30,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:57:44	2
3052854	99	33	30,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:57:44	2
3052854	99	33	30,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	19:46:29	2
3052854	99	33	29,3	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:40:19	2
3052854	99	33	29,3	cyclictest	3073335	-21	kworker/u8:0+events_unbound	19:40:19	2
3052852	99	33	31,2	cyclictest	3327567	-21	kworker/u8:0+events_unbound	00:35:28	1
3052852	99	33	31,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:14:30	1
3052852	99	33	30,2	cyclictest	3078990	-21	kworker/u8:3+events_unbound	19:57:28	1
3052848	99	33	26,5	cyclictest	3367875	-21	ntpq	00:10:21	0
3052859	99	32	27,3	cyclictest	3094668	-21	apt-get	19:50:12	3
3052854	99	32	29,2	cyclictest	3306543	-21	kworker/u8:2+events_unbound	23:18:26	2
3052854	99	32	29,2	cyclictest	3233817	-21	kworker/u8:0+events_unbound	22:50:15	2
3052854	99	32	29,2	cyclictest	3142173	-21	kworker/u8:2+flush-259:0	21:15:25	2
3052852	99	32	29,2	cyclictest	3327567	-21	kworker/u8:0+events_unbound	23:58:27	1
3052852	99	32	29,2	cyclictest	3327567	-21	kworker/u8:0+events_unbound	23:53:04	1
3052852	99	32	29,2	cyclictest	3032481	-21	kworker/u8:1+events_unbound	19:20:19	1
3052852	99	32	28,3	cyclictest	3353383	-21	kworker/u8:4+events_unbound	00:12:28	1
3052852	99	32	28,3	cyclictest	3306543	-21	kworker/u8:2+events_unbound	23:38:29	1
3052852	99	32	27,3	cyclictest	3218575	-21	/usr/sbin/munin	21:50:14	1
3052848	99	32	1,29	cyclictest	1	-21	systemd	00:09:26	0
3052854	99	31	28,2	cyclictest	3353381	-21	kworker/u8:1+events_unbound	00:31:50	2
3052854	99	31	28,2	cyclictest	3177225	-21	kworker/u8:1+events_unbound	21:22:28	2
3052854	99	31	27,3	cyclictest	3218574	-21	kworker/u8:2+events_unbound	22:06:58	2
3052854	99	31	26,2	cyclictest	3089227	-21	kworker/u8:1+events_unbound	20:09:29	2
3052852	99	31	29,2	cyclictest	3177225	-21	kworker/u8:1+events_unbound	21:21:52	1
3052852	99	31	29,2	cyclictest	3120635	-21	kworker/u8:3+events_unbound	20:55:18	1
3052852	99	31	28,2	cyclictest	3306543	-21	kworker/u8:2+events_unbound	23:33:27	1
3052852	99	31	28,2	cyclictest	3233817	-21	kworker/u8:0+events_unbound	23:02:08	1
3052852	99	31	28,2	cyclictest	3233817	-21	kworker/u8:0+events_unbound	22:35:29	1
3052852	99	31	28,2	cyclictest	3120635	-21	kworker/u8:3+events_unbound	20:20:18	1
3052852	99	31	28,2	cyclictest	3032481	-21	kworker/u8:1+events_unbound	19:28:29	1
3052852	99	31	27,3	cyclictest	3052808	-21	kworker/u8:2+events_unbound	19:17:28	1
3052852	99	31	27,3	cyclictest	3032481	-21	kworker/u8:1+events_unbound	19:13:28	1
3052848	99	31	24,4	cyclictest	1	-21	systemd	00:30:00	0
3052848	99	31	0,29	cyclictest	1	-21	systemd	00:05:00	0
3052854	99	30	27,2	cyclictest	3197665	-21	kworker/u8:3+events_unbound	21:36:53	2
3052854	99	30	27,2	cyclictest	3142173	-21	kworker/u8:2+events_unbound	20:43:30	2
3052854	99	30	26,3	cyclictest	3348022	-21	kworker/u8:3+events_unbound	23:58:03	2
3052852	99	30	27,2	cyclictest	3187506	-21	kworker/u8:0+events_unbound	21:41:28	1
3052852	99	30	27,2	cyclictest	3156650	-21	kworker/u8:0+events_unbound	20:51:29	1
3052852	99	30	26,3	cyclictest	3197665	-21	kworker/u8:3+events_unbound	23:13:28	1
3052852	99	30	26,3	cyclictest	252	-21	systemd-journal	21:29:59	1
3052848	99	30	23,5	cyclictest	3160923	-21	ntpq	20:50:23	0
3052854	99	29	26,2	cyclictest	3233817	-21	kworker/u8:0+events_unbound	22:37:05	2
3052854	99	29	26,2	cyclictest	3218574	-21	kworker/u8:2+events_unbound	22:15:03	2
3052854	99	29	26,2	cyclictest	3032481	-21	kworker/u8:1+events_unbound	19:16:29	2
3052852	99	29	26,3	cyclictest	3142173	-21	kworker/u8:2+events_unbound	21:11:28	1
3052852	99	29	26,2	cyclictest	3368818	-21	kworker/u8:3+events_unbound	00:15:24	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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