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 Thu Mar 26, 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
2679728	99	48	45,2	cyclictest	2788526	-21	kworker/u8:2+flush-259:0	21:00:23	3
2679723	99	40	37,2	cyclictest	2908270	-21	kworker/u8:2+events_unbound	23:45:23	1
2679723	99	35	32,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	21:40:15	1
2679723	99	35	31,3	cyclictest	2939841	-21	apt-get	23:20:11	1
2679723	99	35	31,3	cyclictest	2908270	-21	kworker/u8:2+events_unbound	22:55:23	1
2679719	99	35	32,2	cyclictest	2939601	-21	kworker/u8:3+flush-259:0	23:25:15	0
2679723	99	34	31,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	20:45:20	1
2679723	99	34	30,3	cyclictest	2829751	-21	kworker/u8:2+events_unbound	21:45:15	1
2679723	99	34	30,3	cyclictest	2690281	-21	apt-get	19:20:12	1
2679719	99	34	32,1	cyclictest	1	-21	systemd	20:20:00	0
2679723	99	33	30,2	cyclictest	2788526	-21	kworker/u8:2+events_unbound	21:00:22	1
2679723	99	33	30,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	21:20:26	1
2679723	99	32	29,2	cyclictest	2626182	-21	kworker/u8:0+events_unbound	19:30:24	1
2679723	99	32	27,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	20:05:25	1
2679723	99	32	26,3	cyclictest	2767553	-21	kworker/u8:0+events_unbound	21:10:22	1
2679726	99	30	27,2	cyclictest	2720936	-21	kworker/u8:4+flush-259:0	20:00:25	2
2679723	99	30	27,2	cyclictest	2886809	-21	kworker/u8:0+events_unbound	22:48:23	1
2679723	99	30	26,3	cyclictest	2908270	-21	kworker/u8:2+events_unbound	23:30:23	1
2679723	99	30	26,3	cyclictest	2829751	-21	kworker/u8:2+events_unbound	21:54:24	1
2679726	99	29	26,2	cyclictest	2767553	-21	kworker/u8:0+flush-259:0	21:25:00	2
2679726	99	29	25,3	cyclictest	2928837	-21	apt-get	23:10:00	2
2679723	99	29	26,2	cyclictest	2976248	-21	kworker/u8:3+events_unbound	00:25:21	1
2679723	99	29	26,2	cyclictest	2908270	-21	kworker/u8:2+events_unbound	00:05:22	1
2679723	99	29	25,3	cyclictest	2731435	-21	apt-get	20:00:11	1
2679723	99	28	24,3	cyclictest	2908270	-21	kworker/u8:2+events_unbound	00:03:33	1
2679719	99	28	24,3	cyclictest	2767929	-21	/usr/sbin/munin	20:35:14	0
2679726	99	27	24,2	cyclictest	2908270	-21	kworker/u8:2+flush-259:0	23:50:00	2
2679723	99	27	24,2	cyclictest	2690041	-21	kworker/u8:1+events_unbound	19:45:24	1
2679723	99	27	23,3	cyclictest	2965720	-21	kworker/u8:0+events_unbound	00:17:12	1
2679723	99	27	23,3	cyclictest	2955440	-21	kworker/u8:1+events_unbound	23:50:27	1
2679726	99	26	20,4	cyclictest	2856388	-21	diskstats	22:00:14	2
2679723	99	26	23,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	22:00:16	1
2679723	99	26	23,2	cyclictest	2720936	-21	kworker/u8:4+events_unbound	21:17:22	1
2679723	99	26	22,3	cyclictest	2965720	-21	kworker/u8:0+events_unbound	00:35:14	1
2679726	99	25	19,4	cyclictest	252	-21	systemd-journal	20:20:00	2
2679723	99	25	22,3	cyclictest	2866258	-21	kworker/u8:1+events_unbound	22:14:23	1
2679723	99	25	22,2	cyclictest	2939601	-21	kworker/u8:3+events_unbound	23:25:14	1
2679723	99	25	22,2	cyclictest	2908270	-21	kworker/u8:2+events_unbound	23:05:26	1
2679723	99	25	22,2	cyclictest	2829751	-21	kworker/u8:2+events_unbound	22:17:22	1
2679723	99	25	22,2	cyclictest	2814159	-21	kworker/u8:3+events_unbound	21:25:51	1
2679723	99	25	22,2	cyclictest	2690041	-21	kworker/u8:1+events_unbound	20:15:14	1
2679723	99	25	21,3	cyclictest	2929497	-21	kworker/u8:0+events_unbound	23:13:22	1
2679723	99	25	21,3	cyclictest	2626182	-21	kworker/u8:0+events_unbound	19:39:23	1
2679719	99	25	22,2	cyclictest	2783157	-21	kworker/u8:1+flush-259:0	21:09:59	0
2679719	99	25	21,3	cyclictest	2690041	-21	kworker/u8:1+flush-259:0	20:20:22	0
2679726	99	24	19,4	cyclictest	2945003	-21	apt-get	23:25:12	2
2679723	99	24	21,2	cyclictest	2626182	-21	kworker/u8:0+events_unbound	19:10:15	1
2679723	99	24	20,3	cyclictest	2976248	-21	kworker/u8:3+events_unbound	23:57:34	1
2679723	99	24	20,3	cyclictest	2976248	-21	kworker/u8:3+events_unbound	00:24:43	1
2679723	99	24	20,3	cyclictest	2788526	-21	kworker/u8:2+events_unbound	21:05:17	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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