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 Feb 22, 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
710257	99	48	39,6	cyclictest	881424	-21	cp	21:55:00	1
710256	99	46	42,3	cyclictest	912816	-21	apt-get	22:25:12	0
710257	99	43	35,5	cyclictest	1051868	-21	ntpq	00:35:22	1
710265	99	39	35,3	cyclictest	767362	-21	kworker/u8:2+flush-259:0	20:20:21	2
710257	99	38	32,4	cyclictest	938562	-21	apt-get	22:50:12	1
710256	99	38	35,2	cyclictest	840024	-21	kworker/u8:1+flush-259:0	21:45:17	0
710269	99	37	33,2	cyclictest	907414	-21	kworker/u8:3+events_unbound	22:30:18	3
710269	99	36	32,3	cyclictest	809084	-21	kworker/u8:3+flush-259:0	20:45:23	3
710257	99	36	34,1	cyclictest	751522	-21	kworker/1:2+pm	23:18:18	1
710257	99	36	30,4	cyclictest	871213	-21	apt-get	21:45:12	1
710257	99	36	30,4	cyclictest	1011559	-21	apt-get	00:00:12	1
710269	99	35	32,2	cyclictest	866228	-21	kworker/u8:2+flush-259:0	22:40:19	3
710269	99	35	31,3	cyclictest	767362	-21	kworker/u8:2+events_unbound	20:30:24	3
710265	99	35	31,3	cyclictest	798849	-21	kworker/u8:0+flush-259:0	21:25:17	2
710256	99	35	30,3	cyclictest	761781	-21	gpgv	19:59:59	0
710269	99	34	31,2	cyclictest	948611	-21	kworker/u8:3+events_unbound	23:05:19	3
710265	99	34	31,2	cyclictest	756641	-21	kworker/u8:4+flush-259:0	20:25:26	2
710256	99	34	30,3	cyclictest	984975	-21	kworker/u8:1+events_unbound	00:10:22	0
710265	99	33	29,3	cyclictest	829887	-21	kworker/u8:4+flush-259:0	21:10:25	2
710257	99	33	30,2	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:40:28	1
710257	99	33	29,3	cyclictest	990127	-21	kworker/u8:5+events_unbound	23:45:28	1
710269	99	32	29,2	cyclictest	907414	-21	kworker/u8:3+flush-259:0	22:35:21	3
710269	99	32	29,2	cyclictest	704811	-21	kworker/u8:3+flush-259:0	19:15:26	3
710256	99	32	28,3	cyclictest	720512	-21	kworker/u8:1+flush-259:0	20:00:17	0
710269	99	31	27,3	cyclictest	840024	-21	kworker/u8:1+flush-259:0	21:15:21	3
710269	99	31	26,3	cyclictest	829896	-21	/usr/sbin/munin	21:05:15	3
710265	99	31	27,3	cyclictest	881265	-21	gpgv	21:55:00	2
710256	99	31	25,4	cyclictest	715606	-21	/usr/sbin/munin	19:15:20	0
710256	99	31	24,5	cyclictest	897492	-21	diskstats	22:10:16	0
710269	99	30	26,3	cyclictest	890973	-21	kworker/u8:1+flush-259:0	22:05:17	3
710257	99	30	25,3	cyclictest	1021959	-21	apt-get	00:10:12	1
710257	99	30	23,5	cyclictest	704811	-21	kworker/u8:3+flush-259:0	19:15:17	1
710256	99	30	27,2	cyclictest	829887	-21	kworker/u8:4+flush-259:0	21:10:27	0
710265	99	29	26,2	cyclictest	984975	-21	kworker/u8:1+flush-259:0	00:30:21	2
710265	99	29	26,2	cyclictest	938322	-21	kworker/u8:0+flush-259:0	23:00:18	2
710265	99	29	26,2	cyclictest	938322	-21	kworker/u8:0+flush-259:0	23:00:17	2
710257	99	29	26,2	cyclictest	667381	-21	kworker/u8:2+events_unbound	19:22:26	1
710256	99	29	26,2	cyclictest	928025	-21	kworker/u8:1+events_unbound	22:50:14	0
710256	99	29	24,3	cyclictest	1010865	-21	latency_hist	00:00:01	0
710269	99	28	24,3	cyclictest	725673	-21	latency_hist	19:25:01	3
710269	99	27	24,2	cyclictest	1010892	-21	kworker/u8:0+flush-259:0	00:15:25	3
710265	99	27	24,2	cyclictest	984975	-21	kworker/u8:1+events_unbound	23:55:18	2
710265	99	27	24,2	cyclictest	751686	-21	kworker/u8:0+flush-259:0	19:50:22	2
710269	99	26	23,2	cyclictest	948611	-21	kworker/u8:3+flush-259:0	23:20:22	3
710269	99	26	23,2	cyclictest	809084	-21	kworker/u8:3+flush-259:0	20:50:21	3
710265	99	26	23,2	cyclictest	907414	-21	kworker/u8:3+flush-259:0	22:30:21	2
710265	99	26	22,3	cyclictest	866228	-21	kworker/u8:2+flush-259:0	22:45:24	2
710257	99	26	22,3	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:35:18	1
710256	99	26	23,2	cyclictest	948611	-21	kworker/u8:3+flush-259:0	23:15:21	0
710256	99	26	23,2	cyclictest	907414	-21	kworker/u8:3+events_unbound	22:35:19	0
710256	99	26	22,3	cyclictest	948611	-21	kworker/u8:3+flush-259:0	23:30:15	0
710256	99	26	22,3	cyclictest	751718	-21	apt-get	19:50:12	0
710256	99	26	22,3	cyclictest	731048	-21	apt-get	19:30:10	0
710256	99	26	22,3	cyclictest	720512	-21	kworker/u8:1+events_unbound	20:05:17	0
710265	99	25	22,2	cyclictest	809084	-21	kworker/u8:3+flush-259:0	21:20:25	2
710265	99	25	22,2	cyclictest	720512	-21	kworker/u8:1+flush-259:0	20:00:16	2
710257	99	25	19,5	cyclictest	829887	-21	kworker/u8:4+flush-259:0	21:10:17	1
710257	99	25	18,5	cyclictest	978842	-21	ntpq	23:25:22	1
710256	99	25	22,2	cyclictest	860647	-21	kworker/u8:3+flush-259:0	21:50:15	0
710256	99	25	22,2	cyclictest	704811	-21	kworker/u8:3+flush-259:0	19:45:17	0
710256	99	25	21,3	cyclictest	974533	-21	kworker/u8:4+events_unbound	23:50:17	0
710256	99	25	20,3	cyclictest	252	-21	systemd-journal	22:02:15	0
710256	99	25	18,5	cyclictest	746275	-21	latency_hist	19:45:01	0
710269	99	24	21,2	cyclictest	866228	-21	kworker/u8:2+flush-259:0	21:40:17	3
710265	99	24	21,2	cyclictest	948611	-21	kworker/u8:3+flush-259:0	23:35:23	2
710265	99	24	21,2	cyclictest	866228	-21	kworker/u8:2+flush-259:0	22:30:00	2
710265	99	24	20,3	cyclictest	938322	-21	kworker/u8:0+flush-259:0	23:05:24	2
710257	99	24	19,3	cyclictest	746534	-21	apt-get	19:45:11	1
710257	99	24	18,4	cyclictest	1042594	-21	/usr/sbin/munin	00:30:15	1
710257	99	24	17,5	cyclictest	803940	-21	latency_hist	20:40:01	1
710256	99	24	21,2	cyclictest	917952	-21	apt-get	22:30:11	0
710256	99	24	20,3	cyclictest	798849	-21	kworker/u8:0+events_unbound	21:35:15	0
710256	99	24	20,3	cyclictest	704811	-21	kworker/u8:3+flush-259:0	19:35:24	0
710269	99	23	20,2	cyclictest	866228	-21	kworker/u8:2+flush-259:0	22:54:59	3
710269	99	23	20,2	cyclictest	829887	-21	kworker/u8:4+flush-259:0	21:10:15	3
710269	99	23	19,3	cyclictest	938322	-21	kworker/u8:0+flush-259:0	23:00:24	3
710269	99	23	19,3	cyclictest	938322	-21	kworker/u8:0+flush-259:0	23:00:23	3
710265	99	23	21,1	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:10:22	2
710265	99	23	19,3	cyclictest	809084	-21	kworker/u8:3+flush-259:0	20:55:24	2
710265	99	23	19,3	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:45:17	2
710257	99	23	20,2	cyclictest	767362	-21	kworker/u8:2+events_unbound	20:12:18	1
710257	99	23	19,3	cyclictest	500	-21	systemd-logind	20:50:01	1
710256	99	23	20,2	cyclictest	809084	-21	kworker/u8:3+events_unbound	20:50:20	0
710256	99	23	20,2	cyclictest	788086	-21	kworker/u8:1+events_unbound	20:40:25	0
710256	99	23	20,2	cyclictest	767362	-21	kworker/u8:2+flush-259:0	20:10:21	0
710256	99	23	19,3	cyclictest	819644	-21	apt-get	20:55:11	0
710265	99	22	18,3	cyclictest	984975	-21	kworker/u8:1+events_unbound	00:05:23	2
710257	99	22	19,2	cyclictest	720512	-21	kworker/u8:1+events_unbound	19:26:19	1
710257	99	22	17,4	cyclictest	767362	-21	kworker/u8:2+flush-259:0	20:20:16	1
710256	99	22	19,2	cyclictest	809084	-21	kworker/u8:3+flush-259:0	20:45:21	0
710256	99	22	19,2	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:20:21	0
710256	99	22	18,3	cyclictest	1010892	-21	kworker/u8:0+events_unbound	00:15:23	0
710269	99	21	18,2	cyclictest	938322	-21	kworker/u8:0+events_unbound	23:25:17	3
710269	99	21	18,2	cyclictest	798849	-21	kworker/u8:0+events_unbound	21:30:15	3
710269	99	21	18,2	cyclictest	767362	-21	kworker/u8:2+flush-259:0	20:20:20	3
710269	99	21	18,2	cyclictest	704811	-21	kworker/u8:3+flush-259:0	19:40:16	3
710265	99	21	18,2	cyclictest	860647	-21	kworker/u8:3+flush-259:0	22:00:20	2
710265	99	21	18,2	cyclictest	1047573	-21	kworker/u8:3+flush-259:0	00:35:24	2
710265	99	21	17,3	cyclictest	928025	-21	kworker/u8:1+events_unbound	22:40:23	2
710265	99	21	17,3	cyclictest	704811	-21	kworker/u8:3+events_unbound	19:35:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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