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2026-06-16 - 23:47

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 the 100 highest latencies:
System rackfslot4s.osadl.org (updated Tue Jun 16, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
951221270,3chrt9513-21runrttasks07:25:290
1722321230,3chrt17225-21aten2.4_rfpower08:30:230
766221200,2chrt7659-21cat08:15:020
2917821200,2sleep029180-21seq12:04:440
3204321190,2chrt32038-21apt-config11:20:120
1767921180,2chrt17677-21ld11:46:430
2642921170,3chrt26430-21seq09:35:250
1068021160,1sleep010681-21latency11:36:100
2047721150,2chrt20478-21cat10:15:070
1740721150,1sleep017408-21seq10:57:530
1701021150,3chrt17011-21/usr/sbin/munin09:21:050
506421130,2chrt5065-21sleep10:40:000
37321130,2chrt374-21chrt09:45:020
1509121130,3chrt15092-21sleep12:31:440
1439921130,3chrt14400-21gcc09:16:530
3102021120,2sleep031021-21chrt10:30:090
2921421110,2chrt29215-21sleep10:27:010
1296821110,1sleep012969-21seq10:03:280
2561821100,2chrt25621-21sed10:21:540
2160321090,2chrt21584-21apt-get07:45:130
2698121080,2chrt26982-21awk11:12:120
1582621050,3chrt15827-21runrttasks11:44:310
1329821030,2chrt13299-21sh12:29:430
3097121000,2sleep030972-21chrt08:00:200
231321000,2chrt2314-21sleep07:14:250
278542920,2sleep027856-21find08:46:250
208572900,2sleep020856-21awk10:15:210
23222870,2sleep02324-21wc12:12:220
188042870,3chrt18307-21apt-get11:00:240
123592870,2sleep012356-21forks10:50:500
98642850,2chrt9838-21ntpq10:46:270
294462850,2sleep029444-21users07:56:310
68172840,3sleep06818-21ls12:20:010
153522840,2sleep015353-21seq10:06:520
44392830,1sleep04441-21grep09:50:510
247722780,2sleep024774-21awk08:41:260
211402780,2sleep021143-21tr09:27:000
74122730,2sleep07413-21basename09:55:350
196002730,2sleep019601-21chrt11:50:210
2926127210,47sleep029263-21diskstats07:05:250
68862680,2sleep06887-21perl11:30:520
243242670,3sleep024325-21ld09:31:270
32672640,2sleep03268-21seq09:00:070
123042620,1sleep012305-21chrt09:14:110
74562590,2sleep07457-21df12:20:440
166552530,2sleep016654-21ld07:36:150
50802510,1sleep05078-21sshd07:18:270
82712505,6sleep08275-21sh09:07:080
242982500,3sleep024280-21ntpq11:56:430
31937904918,24cyclictest0-21swapper09:48:250
302452490,2chrt30243-21/usr/sbin/munin12:06:010
235362492,6sleep023533-21ntpq11:06:560
129162497,35sleep012920-21sleep08:22:310
77722480,2sleep07776-21seq08:15:130
5602483,36sleep0608-21sshd08:55:350
31937904716,23cyclictest0-21swapper12:37:520
69652460,2chrt6963-21/usr/sbin/munin07:21:320
31937904616,20cyclictest0-21swapper11:25:110
78112440,3sleep07809-21ssh10:43:430
31937904419,18cyclictest412-21snmpd08:50:540
31937904416,10cyclictest12367-21telnet07:30:230
165662442,35sleep016570-21sleep08:29:050
31937904114,11cyclictest20404-21runrttasks07:42:130
3193790406,27cyclictest29048-21diskstats11:15:460
3193790404,16cyclictest26347-21users07:51:330
31937904019,14cyclictest0-21swapper08:35:250
3193790394,17cyclictest2828-21ntp_states08:06:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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