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2026-05-12 - 10:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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 all highest latencies:
System rackfslot4s.osadl.org (updated Tue May 12, 2026 00:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2577221190,3chrt25757-21ntpq20:31:530
416721180,2chrt4058-21latency_hist00:05:040
1212921180,3chrt12128-21modprobe22:40:000
2097221160,2chrt20974-21if_can021:16:060
1584821160,4chrt15849-21chrt00:22:010
2062521140,3chrt20629-21fschecks_count23:40:520
2397321130,3chrt23974-21sh22:08:560
1707321120,4chrt17071-21/usr/sbin/munin22:46:420
3058521100,3chrt30586-21sh23:06:450
759321070,2sleep07595-21if_eth123:21:020
2733721070,3chrt27338-21sh19:43:160
2224821060,3chrt22249-21runrttasks22:55:000
845521030,2chrt8456-21runrttasks22:34:220
2712321010,2chrt27124-21sleep22:13:280
308122960,2sleep030813-21fschecks_count21:30:520
90862950,2sleep09085-21seq00:11:490
283232940,2sleep028326-21grep22:15:370
54442920,2sleep05446-21collect220:51:020
103372920,2sleep010338-21basename23:25:340
54332910,2sleep05437-21sed21:41:070
270372900,2sleep027038-21ssh21:25:240
305362890,2sleep030538-21forks23:55:500
34382880,1sleep03436-21awk23:15:150
254652880,2sleep025466-21seq00:36:380
7092850,2chrt705-21ps19:52:140
26642830,2sleep02665-21chrt22:25:420
113762830,2sleep011377-21cut21:50:310
111422830,1sleep011144-21aten2.4_rfpower00:15:340
61912790,2sleep06194-21timerandwakeup00:07:200
177612760,2sleep017764-21tr22:00:010
16342760,2sleep01635-21chrt23:12:080
219992750,3sleep022000-21seq00:31:390
88142700,2sleep08816-21awk20:56:230
177342700,2sleep017736-21cut00:25:350
42132690,1sleep04214-21chrt19:05:550
149402680,1sleep014942-21tail20:15:250
130782670,2sleep013079-21fschecks_time19:20:340
286102660,2sleep028611-21fschecks_time19:45:350
250582660,1sleep025060-21ssh22:58:470
102342650,2sleep010235-21seq21:48:060
249222600,1sleep024924-21latency_hist19:40:030
171422580,2sleep017140-21processes19:26:230
137192540,1sleep013721-21head21:05:230
287472515,5sleep028741-21ssh23:52:250
75842500,2sleep07588-21grep19:11:370
253322490,2sleep025333-21chrt23:47:210
121312490,2chrt12129-21/usr/sbin/munin21:01:280
6046904817,23cyclictest0-21swapper22:40:060
6046904718,22cyclictest0-21swapper23:03:000
193612470,3chrt19359-21/usr/sbin/munin22:01:400
21322460,3sleep02133-21chrt19:55:140
259612450,3sleep025956-21ssh21:23:090
6046904415,21cyclictest25720-21kworker/0:122:20:190
14052440,2chrt1400-21telnet20:45:250
108862440,3chrt10888-21processes19:16:210
6046904315,20cyclictest0-21swapper23:33:140
6046904314,22cyclictest0-21swapper21:37:370
604690426,17cyclictest22226-21ntpq20:26:090
604690424,19cyclictest18556-21ntpq21:12:220
604690424,10cyclictest18232-21df20:20:290
604690414,10cyclictest12295-21df20:11:190
6046904116,18cyclictest28115-21irqrtprio20:35:440
604690406,17cyclictest9542-21ntpq20:06:060
6046904019,14cyclictest0-21swapper20:00:240
6046904015,18cyclictest7315-21runrttasks19:31:000
604690394,16cyclictest7315-21runrttasks23:35:080
604690376,10cyclictest31021-21perl20:40:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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