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 Sat Jul 19, 2025 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2114788	99	42	38,3	cyclictest	2235654	-21	kworker/u8:4+events_unbound	21:20:17	0
2114788	99	40	36,3	cyclictest	2172103	-21	kworker/u8:2+events_unbound	20:15:13	0
2114788	99	40	33,3	cyclictest	2209508	-21	kworker/u8:3+events_unbound	20:50:28	0
2114788	99	39	36,2	cyclictest	2359713	-21	kworker/u8:3+events_unbound	23:15:24	0
2114788	99	39	35,3	cyclictest	2172103	-21	kworker/u8:2+events_unbound	20:25:18	0
2114788	99	38	1,35	cyclictest	503	-21	systemd-logind	22:30:01	0
2114788	99	37	34,2	cyclictest	2235654	-21	kworker/u8:4+events_unbound	21:15:22	0
2114788	99	36	33,2	cyclictest	2416393	-21	kworker/u8:2+events_unbound	00:15:15	0
2114788	99	36	33,2	cyclictest	2094192	-21	kworker/u8:4+events_unbound	19:20:19	0
2114788	99	36	32,3	cyclictest	2235654	-21	kworker/u8:4+events_unbound	22:00:17	0
2114797	99	35	32,2	cyclictest	2343863	-21	kworker/u8:4+flush-259:0	23:09:59	2
2114797	99	35	30,3	cyclictest	2172103	-21	kworker/u8:2+flush-259:0	21:45:00	2
2114800	99	34	30,3	cyclictest	2209508	-21	kworker/u8:3+flush-259:0	20:50:21	3
2114797	99	34	27,4	cyclictest	2271515	-21	latency_hist	21:40:01	2
2114788	99	34	31,2	cyclictest	2359502	-21	kworker/u8:1+events_unbound	23:20:22	0
2114788	99	34	30,3	cyclictest	2343863	-21	kworker/u8:4+flush-259:0	23:30:24	0
2114788	99	34	30,3	cyclictest	2146408	-21	apt-get	19:40:14	0
2114788	99	34	30,3	cyclictest	21	1	rcuc/0	22:40:00	0
2114788	99	33	30,2	cyclictest	2447464	-21	kworker/u8:3+flush-259:0	00:30:20	0
2114788	99	33	30,2	cyclictest	2406080	-21	kworker/u8:1+events_unbound	00:20:21	0
2114788	99	32	30,2	cyclictest	2343863	-21	kworker/u8:4+events_unbound	23:40:15	0
2114788	99	31	28,2	cyclictest	2384392	-21	kworker/u8:0+events_unbound	23:57:18	0
2114788	99	31	26,4	cyclictest	2416646	-21	apt-get	00:00:12	0
2114793	99	30	24,4	cyclictest	2146131	-21	latency_hist	19:40:01	1
2114788	99	30	27,2	cyclictest	2317900	-21	kworker/u8:2+flush-259:0	23:00:19	0
2114788	99	30	27,2	cyclictest	2302481	-21	kworker/u8:1+events_unbound	22:45:17	0
2114788	99	30	27,2	cyclictest	2235654	-21	kworker/u8:4+events_unbound	21:40:12	0
2114788	99	30	27,2	cyclictest	2172103	-21	kworker/u8:2+events_unbound	21:05:21	0
2114800	99	29	23,4	cyclictest	2416381	-21	latency_hist	00:00:00	3
2114788	99	29	26,2	cyclictest	2343863	-21	kworker/u8:4+flush-259:0	23:25:19	0
2114788	99	29	26,2	cyclictest	2235654	-21	kworker/u8:4+flush-259:0	21:55:20	0
2114788	99	29	26,2	cyclictest	2209508	-21	kworker/u8:3+flush-259:0	21:00:20	0
2114788	99	29	26,2	cyclictest	2108681	-21	kworker/u8:1+flush-259:0	19:45:20	0
2114788	99	29	25,3	cyclictest	2328379	-21	kworker/u8:4+events_unbound	22:40:25	0
2114788	99	29	25,3	cyclictest	2161782	-21	kworker/u8:3+events_unbound	19:55:18	0
2114800	99	28	21,5	cyclictest	2209707	-21	diskstats	20:40:15	3
2114797	99	28	22,4	cyclictest	2380153	-21	latency_hist	23:25:01	2
2114793	99	28	22,4	cyclictest	3000063	-21	rs:main		1
2114788	99	28	25,2	cyclictest	2384392	-21	kworker/u8:0+events_unbound	23:46:57	0
2114788	99	28	25,2	cyclictest	2188061	-21	kworker/u8:4+flush-259:0	20:30:20	0
2114788	99	28	24,3	cyclictest	2235654	-21	kworker/u8:4+events_unbound	21:25:15	0
2114800	99	27	23,3	cyclictest	2384392	-21	kworker/u8:0+flush-259:0	23:40:26	3
2114800	99	27	23,3	cyclictest	2235654	-21	kworker/u8:4+flush-259:0	22:05:00	3
2114788	99	27	24,2	cyclictest	2172103	-21	kworker/u8:2+events_unbound	21:35:19	0
2114788	99	27	23,3	cyclictest	2209508	-21	kworker/u8:3+events_unbound	20:45:28	0
2114788	99	27	22,4	cyclictest	2135413	-21	apt-get	19:30:01	0
2114800	99	26	22,3	cyclictest	3754036	-21	systemd-journal	23:40:00	3
2114800	99	26	22,3	cyclictest	3754036	-21	systemd-journal	20:25:00	3
2114800	99	26	21,4	cyclictest	2323259	-21	/usr/sbin/munin	22:30:18	3
2114797	99	26	20,4	cyclictest	2161552	-21	latency_hist	19:55:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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