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 Fri Jul 24, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
453521	99	60	54,4	cyclictest	666676	-21	latency_hist	10:35:00	3
453509	99	58	52,4	cyclictest	624953	-21	latency_hist	09:55:01	1
453515	99	52	43,6	cyclictest	335557	-21	systemd-journal	11:40:00	2
453521	99	49	45,3	cyclictest	765266	-21	kworker/u8:0+events_unbound	12:20:17	3
453521	99	49	45,3	cyclictest	604122	-21	kworker/u8:1+events_unbound	09:40:01	3
453508	99	47	40,5	cyclictest	603899	-21	latency_hist	09:35:01	0
453521	99	46	44,2	cyclictest	604122	-21	kworker/u8:1+events_unbound	09:40:25	3
453508	99	44	36,6	cyclictest	335557	-21	systemd-journal	11:05:00	0
453521	99	43	40,2	cyclictest	541338	-21	kworker/u8:3+events_unbound	08:50:29	3
453515	99	43	38,3	cyclictest	541483	-21	base64	08:35:00	2
453508	99	43	37,4	cyclictest	640909	-21	latency_hist	10:10:00	0
453521	99	42	39,2	cyclictest	484534	-21	kworker/u8:3+events_unbound	08:05:23	3
453521	99	42	38,3	cyclictest	530928	-21	kworker/u8:0+events_unbound	09:00:28	3
453521	99	42	35,5	cyclictest	335557	-21	systemd-journal	09:15:00	3
453521	99	40	36,3	cyclictest	620011	-21	kworker/u8:3+events_unbound	10:04:47	3
453521	99	40	36,2	cyclictest	666705	-21	kworker/u8:1+events_unbound	11:52:28	3
453521	99	39	34,4	cyclictest	765266	-21	kworker/u8:0+events_unbound	12:39:28	3
453508	99	39	32,5	cyclictest	630685	-21	cp	10:00:01	0
453521	99	38	35,2	cyclictest	646082	-21	kworker/u8:0+events_unbound	11:05:21	3
453521	99	38	35,2	cyclictest	646082	-21	kworker/u8:0+events_unbound	11:05:21	3
453521	99	38	35,2	cyclictest	646082	-21	kworker/u8:0+events_unbound	10:45:18	3
453521	99	38	32,3	cyclictest	463759	-21	kworker/u8:0+events_unbound	07:29:29	3
453521	99	37	34,2	cyclictest	666705	-21	kworker/u8:1+events_unbound	11:45:00	3
453521	99	37	34,2	cyclictest	541338	-21	kworker/u8:3+events_unbound	09:25:22	3
453521	99	37	34,2	cyclictest	520619	-21	kworker/u8:2+events_unbound	08:40:15	3
453521	99	37	34,2	cyclictest	463759	-21	kworker/u8:0+events_unbound	07:31:28	3
453521	99	37	33,3	cyclictest	666705	-21	kworker/u8:1+events_unbound	10:41:28	3
453521	99	37	33,3	cyclictest	635964	-21	kworker/u8:4+events_unbound	10:05:23	3
453521	99	37	31,4	cyclictest	723496	-21	latency_hist	11:30:01	3
453515	99	37	31,3	cyclictest	530928	-21	kworker/u8:0+flush-259:0	09:05:15	2
453509	99	37	32,3	cyclictest	557570	-21	/usr/sbin/munin	08:50:15	1
453508	99	37	32,4	cyclictest	515708	-21	apt-get	08:10:12	0
453521	99	36	33,2	cyclictest	749543	-21	kworker/u8:4+events_unbound	12:00:23	3
453521	99	36	33,2	cyclictest	656396	-21	kworker/u8:3+flush-259:0	10:25:23	3
453521	99	36	32,3	cyclictest	541338	-21	kworker/u8:3+events_unbound	08:49:29	3
453521	99	36	32,3	cyclictest	531136	-21	kworker/u8:4+events_unbound	08:30:21	3
453509	99	36	30,4	cyclictest	567657	-21	latency_hist	09:00:01	1
453508	99	36	29,5	cyclictest	556414	-21	ntpq	08:45:20	0
453521	99	34	31,2	cyclictest	530928	-21	kworker/u8:0+events_unbound	09:15:15	3
453521	99	34	30,3	cyclictest	410425	-21	kworker/u8:1+events_unbound	08:16:28	3
453521	99	33	30,2	cyclictest	723208	-21	kworker/u8:2+events_unbound	11:45:25	3
453521	99	33	29,3	cyclictest	484534	-21	kworker/u8:3+events_unbound	08:24:29	3
453508	99	33	28,4	cyclictest	410425	-21	kworker/u8:1+flush-259:0	08:20:00	0
453521	99	32	29,2	cyclictest	646082	-21	kworker/u8:0+events_unbound	10:35:15	3
453521	99	32	29,2	cyclictest	410425	-21	kworker/u8:1+flush-259:0	07:20:25	3
453521	99	32	29,2	cyclictest	410425	-21	kworker/u8:1+events_unbound	08:25:23	3
453521	99	32	28,3	cyclictest	614204	-21	kworker/u8:2+events_unbound	10:10:23	3
453515	99	32	25,6	cyclictest	635964	-21	kworker/u8:4+flush-259:0	10:15:00	2
453509	99	32	28,3	cyclictest	791513	-21	apt-get	12:35:13	1
453508	99	32	29,2	cyclictest	526037	-21	apt-get	08:20:12	0
453508	99	32	28,3	cyclictest	666705	-21	kworker/u8:1+flush-259:0	11:55:10	0
453515	99	31	26,3	cyclictest	708009	-21	kworker/u8:3+flush-259:0	11:15:18	2
453509	99	31	27,3	cyclictest	463759	-21	kworker/u8:0+flush-259:0	08:00:00	1
453508	99	31	27,3	cyclictest	713438	-21	apt-get	11:20:12	0
453508	99	31	26,3	cyclictest	672123	-21	apt-get	10:40:11	0
453521	99	30	28,2	cyclictest	598771	-21	kworker/u8:2+events_unbound	09:30:20	3
453521	99	30	27,2	cyclictest	666705	-21	kworker/u8:1+events_unbound	11:30:15	3
453521	99	30	27,2	cyclictest	646082	-21	kworker/u8:0+events_unbound	11:10:18	3
453521	99	30	27,2	cyclictest	530928	-21	kworker/u8:0+events_unbound	08:35:18	3
453521	99	30	27,2	cyclictest	530928	-21	kworker/u8:0+events_unbound	08:35:18	3
453515	99	30	26,3	cyclictest	541338	-21	kworker/u8:3+flush-259:0	09:20:00	2
453515	99	30	26,3	cyclictest	463759	-21	kworker/u8:0+flush-259:0	07:55:31	2
453508	99	30	26,3	cyclictest	708009	-21	kworker/u8:3+events_unbound	12:19:28	0
453508	99	30	23,5	cyclictest	499122	-21	ntpq	07:50:23	0
453521	99	29	26,2	cyclictest	765266	-21	kworker/u8:0+events_unbound	12:32:29	3
453521	99	29	26,2	cyclictest	666705	-21	kworker/u8:1+events_unbound	10:56:30	3
453521	99	29	26,2	cyclictest	614204	-21	kworker/u8:2+events_unbound	09:45:13	3
453521	99	29	26,2	cyclictest	463759	-21	kworker/u8:0+events_unbound	07:55:27	3
453521	99	29	23,4	cyclictest	732909	-21	ntpq	11:35:19	3
453521	99	29	23,2	cyclictest	484534	-21	kworker/u8:3+events_unbound	07:50:20	3
453509	99	29	24,3	cyclictest	707988	-21	/usr/sbin/munin	11:15:00	1
453509	99	29	24,3	cyclictest	509	-21	rs:main		1
453508	99	29	26,2	cyclictest	410425	-21	kworker/u8:1+flush-259:0	07:15:18	0
453521	99	28	25,2	cyclictest	410425	-21	kworker/u8:1+events_unbound	07:35:15	3
453515	99	28	22,4	cyclictest	692521	-21	latency_hist	11:00:00	2
453508	99	28	24,3	cyclictest	562736	-21	kworker/u8:1+flush-259:0	08:59:32	0
453508	99	28	24,3	cyclictest	410425	-21	kworker/u8:1+events_unbound	07:25:28	0
453508	99	28	22,4	cyclictest	453462	-21	latency_hist	07:10:01	0
453521	99	27	24,2	cyclictest	646082	-21	kworker/u8:0+flush-259:0	11:00:20	3
453521	99	27	24,2	cyclictest	209573	-21	kworker/u8:3+events_unbound	07:14:12	3
453515	99	27	21,4	cyclictest	530928	-21	kworker/u8:0+flush-259:0	09:35:16	2
453509	99	27	23,3	cyclictest	479327	-21	latency_hist	07:35:00	1
453509	99	27	22,4	cyclictest	604156	-21	apt-get	09:35:11	1
453509	99	27	20,5	cyclictest	677051	-21	latency_hist	10:45:00	1
453508	99	27	23,3	cyclictest	671857	-21	latency_hist	10:40:00	0
453508	99	27	23,3	cyclictest	656396	-21	kworker/u8:3+events_unbound	10:25:28	0
453508	99	27	21,4	cyclictest	754762	-21	apt-get	12:00:13	0
453508	99	27	21,4	cyclictest	655434	-21	ntpq	10:20:20	0
453521	99	26	23,2	cyclictest	666705	-21	kworker/u8:1+events_unbound	11:21:29	3
453521	99	26	23,2	cyclictest	484534	-21	kworker/u8:3+flush-259:0	08:00:21	3
453515	99	26	19,5	cyclictest	759662	-21	latency_hist	12:05:01	2
453509	99	26	20,4	cyclictest	525800	-21	unin-run	08:20:00	1
453508	99	26	22,3	cyclictest	530928	-21	kworker/u8:0+events_unbound	09:09:28	0
453508	99	26	21,4	cyclictest	541992	-21	apt-get	08:35:11	0
453508	99	26	21,4	cyclictest	541992	-21	apt-get	08:35:11	0
453521	99	25	21,3	cyclictest	630333	-21	gpgv	10:00:01	3
453509	99	25	20,3	cyclictest	484534	-21	kworker/u8:3+flush-259:0	08:05:26	1
453509	99	25	19,4	cyclictest	335557	-21	systemd-journal	11:27:27	1
453508	99	25	22,2	cyclictest	749543	-21	kworker/u8:4+events_unbound	12:28:29	0
453508	99	25	21,3	cyclictest	614204	-21	kworker/u8:2+events_unbound	10:12:28	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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