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
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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 50 highest latencies:

System rackeslot4s.osadl.org (updated Tue Nov 25, 2025 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1449192	99	51	48,2	cyclictest	1568742	-21	kworker/u8:0+flush-259:0	22:10:01	1
1449187	99	43	41,1	cyclictest	1650854	-21	fwupd	22:22:22	0
1449194	99	39	35,3	cyclictest	1444256	-21	kworker/u8:1+flush-259:0	20:00:00	2
1449192	99	39	36,2	cyclictest	1491092	-21	kworker/u8:3+events_unbound	20:00:16	1
1449197	99	38	35,2	cyclictest	1485181	-21	kworker/u8:4+flush-259:0	19:45:23	3
1449194	99	38	30,6	cyclictest	2698871	-21	systemd-journal	22:00:01	2
1449192	99	38	35,2	cyclictest	1629649	-21	kworker/u8:2+events_unbound	23:00:18	1
1449192	99	38	35,2	cyclictest	1629649	-21	kworker/u8:2+events_unbound	22:50:14	1
1449192	99	38	30,2	cyclictest	1511695	-21	kworker/u8:4+events_unbound	20:15:17	1
1449197	99	37	34,2	cyclictest	1629649	-21	kworker/u8:2+events_unbound	22:22:21	3
1449192	99	37	34,2	cyclictest	1729694	-21	kworker/u8:0+events_unbound	23:40:15	1
1449192	99	37	34,2	cyclictest	1620235	-21	kworker/u8:1+flush-259:0	22:00:18	1
1449192	99	37	34,2	cyclictest	1568742	-21	kworker/u8:0+events_unbound	22:30:13	1
1449192	99	37	34,2	cyclictest	1444256	-21	kworker/u8:1+events_unbound	19:45:13	1
1449187	99	37	34,2	cyclictest	1656273	-21	kworker/u8:1+flush-259:0	22:44:59	0
1449192	99	36	33,2	cyclictest	1629649	-21	kworker/u8:2+flush-259:0	22:10:24	1
1449192	99	36	33,2	cyclictest	1444256	-21	kworker/u8:1+events_unbound	19:10:22	1
1449197	99	35	32,2	cyclictest	1444256	-21	kworker/u8:1+flush-259:0	19:20:00	3
1449192	99	35	32,2	cyclictest	1434371	-21	kworker/u8:2+events_unbound	19:20:19	1
1449192	99	34	32,2	cyclictest	1537474	-21	kworker/u8:4+flush-259:0	20:40:26	1
1449192	99	34	32,2	cyclictest	1537474	-21	kworker/u8:4+flush-259:0	20:40:25	1
1449192	99	34	31,2	cyclictest	1724311	-21	kworker/u8:4+events_unbound	23:45:14	1
1449192	99	34	31,2	cyclictest	1568742	-21	kworker/u8:0+events_unbound	21:50:01	1
1449187	99	34	28,4	cyclictest	2698871	-21	systemd-journal	22:05:22	0
1449192	99	33	30,2	cyclictest	1656273	-21	kworker/u8:1+events_unbound	23:10:14	1
1449192	99	33	30,2	cyclictest	1444256	-21	kworker/u8:1+events_unbound	20:25:01	1
1449192	99	32	29,2	cyclictest	1702984	-21	kworker/u8:2+events_unbound	23:20:24	1
1449192	99	32	29,2	cyclictest	1671764	-21	kworker/u8:4+events_unbound	23:15:15	1
1449192	99	32	29,2	cyclictest	1526926	-21	kworker/u8:3+events_unbound	20:35:23	1
1449192	99	32	29,2	cyclictest	1526926	-21	kworker/u8:3+events_unbound	20:35:23	1
1449192	99	32	26,5	cyclictest	1651100	-21	latency_hist	22:25:01	1
1449187	99	32	29,2	cyclictest	1563262	-21	kworker/u8:2+flush-259:0	21:20:16	0
1449187	99	32	28,3	cyclictest	1589498	-21	apt-get	21:25:13	0
1449192	99	31	29,2	cyclictest	1526926	-21	kworker/u8:3+flush-259:0	20:55:20	1
1449192	99	31	28,2	cyclictest	1702984	-21	kworker/u8:2+events_unbound	00:05:20	1
1449192	99	31	25,4	cyclictest	2698871	-21	systemd-journal	22:40:00	1
1449194	99	30	27,2	cyclictest	1568742	-21	kworker/u8:0+flush-259:0	21:45:26	2
1449192	99	30	27,2	cyclictest	1563262	-21	kworker/u8:2+events_unbound	21:30:01	1
1449192	99	30	23,2	cyclictest	1537474	-21	kworker/u8:4+events_unbound	20:45:17	1
1449187	99	30	27,2	cyclictest	1537474	-21	kworker/u8:4+flush-259:0	20:45:15	0
1449187	99	30	27,2	cyclictest	1491092	-21	kworker/u8:3+flush-259:0	20:00:20	0
1449197	99	29	26,2	cyclictest	1568742	-21	kworker/u8:0+flush-259:0	22:30:17	3
1449197	99	29	26,2	cyclictest	1491092	-21	kworker/u8:3+flush-259:0	19:55:16	3
1449197	99	29	24,4	cyclictest	2698871	-21	systemd-journal	23:10:00	3
1449194	99	29	23,4	cyclictest	1723440	-21	ntpq	23:30:24	2
1449194	99	29	23,4	cyclictest	1465075	-21	latency_hist	19:25:01	2
1449192	99	29	26,2	cyclictest	1656273	-21	kworker/u8:1+events_unbound	22:40:22	1
1449192	99	29	26,2	cyclictest	1604156	-21	kworker/u8:4+flush-259:0	21:40:22	1
1449192	99	29	26,2	cyclictest	1521513	-21	kworker/u8:2+flush-259:0	20:30:20	1
1449197	99	28	24,3	cyclictest	1702984	-21	kworker/u8:2+events_unbound	00:00:03	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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