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2026-06-21 - 06:54

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 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 Sun Jun 21, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1127021300,2chrt11271-21cat22:31:160
2189621230,2chrt21895-21/usr/sbin/munin21:11:060
2187521220,2chrt21873-21ssh21:59:320
1758721210,2chrt17588-21sh23:29:310
1521021210,1sleep015213-21seq00:14:340
2370921200,3chrt23710-21sh22:50:300
1012621200,2chrt10124-21ld21:41:240
516421160,2chrt5147-21ntpq19:51:210
2744721160,2chrt27445-21telnet19:36:160
2245021160,2sleep022448-21aten2.4_rfpower00:25:320
2163321150,2chrt21634-21seq00:23:550
2064121130,2chrt20642-21ld20:16:130
195221130,3chrt1953-21runrttasks23:54:390
3128121100,2chrt31282-21cat23:01:080
873921090,3chrt8740-21sleep00:04:570
721021090,2sleep07211-21open_inodes21:37:110
2536421090,3chrt25365-21sh22:04:540
1808121090,2chrt18080-21ld22:41:300
2779021070,2chrt27791-21runrttasks23:44:410
2079921040,2chrt20800-21cat22:46:010
2477921010,3chrt24780-21sh20:23:140
51192970,1sleep05121-21if_eth023:10:590
216092970,3sleep021611-21chrt19:25:540
143702970,2sleep014371-21seq19:15:200
313492950,2sleep031351-21chrt21:25:140
140562940,2sleep014057-21seq20:05:450
131472860,2sleep013148-21chrt23:22:320
17962850,2chrt1780-21ntpq19:45:550
42712840,2sleep04272-21chrt23:10:040
318632830,1sleep031864-21chrt20:35:200
283542790,2sleep028355-21aten2.4_rfpower21:20:500
138292780,2sleep013830-21chrt21:47:070
120962780,2sleep012099-21cut19:10:450
37082770,1sleep03710-21ntp_kernel_pll_20:41:140
276752770,2sleep027677-21seq22:56:030
156622770,2sleep015663-21aten2.4_rfpower21:50:340
95722750,2sleep09573-21rm23:17:240
53472750,2sleep05348-21seq21:35:020
90992700,3sleep09100-21cut00:05:320
134752700,1sleep013476-21seq22:35:220
312602670,1sleep031257-21ssh00:38:110
299462640,2sleep029948-21tr23:47:150
317392573,8sleep07315-21runrttasks22:14:170
68882563,10sleep06891-21ntp_states20:46:230
203982563,8sleep020386-21munin-run19:25:020
163182560,2sleep016320-21processes21:01:230
69102550,1sleep06912-21cut22:25:310
225922540,3chrt22590-21/usr/sbin/munin23:36:470
268642533,42sleep026847-21ntpq00:31:240
236832523,7sleep023654-21apt-get19:30:170
159482520,2sleep015949-21cpu00:15:360
101272523,7sleep010143-21aten2.4_rfpower20:00:210
906825013,21sleep09065-21ntpq19:05:410
16412494,35sleep01651-21sshd22:17:220
192522483,37sleep019234-21ntpq23:31:240
11084904818,22cyclictest0-21swapper22:24:280
11084904718,22cyclictest0-21swapper22:06:110
11084904717,23cyclictest0-21swapper23:59:030
267002460,2sleep026701-21ssh21:17:510
316782450,3sleep031677-21date20:35:030
1108490435,10cyclictest19177-21ntpq21:06:020
1108490424,9cyclictest12144-21diskstats20:55:320
1108490415,10cyclictest11616-21munin-run20:55:000
1108490404,9cyclictest16786-21fw_packets20:10:370
1108490394,27cyclictest26908-21ntp_states20:26:170
11084903912,19cyclictest0-21swapper19:55:030
1108490376,11cyclictest31185-21ntpq19:40:580
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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