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2025-12-28 - 02:24

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 792 highest latencies:
System rackfslot4s.osadl.org (updated Sat Dec 27, 2025 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1038421360,2sleep010385-21ls07:50:030
1498821290,2sleep014989-21rm12:04:310
3141921280,3chrt31420-21uname07:30:460
2417621230,3chrt23845-21/usr/sbin/munin10:40:360
2038721180,2sleep020388-21missed_timers08:56:430
2984121160,4chrt29842-21sh10:48:570
667921150,2chrt6681-21wc11:02:230
1454921150,3chrt14551-21mailstats09:37:200
356121140,3chrt3541-21ntpq11:46:440
1064021130,2chrt10637-21ld09:31:240
114821120,2sleep01149-21kernelversion08:25:470
2038521110,2chrt20386-21runrttasks08:05:300
150921110,2chrt1508-21/usr/sbin/munin10:06:170
3020521090,3chrt30206-21chrt12:26:530
202621080,1sleep02027-21idleruntime10:56:000
1709821080,2chrt17096-21ld12:07:130
3150021060,3chrt31501-21runrttasks09:14:510
2466621000,2chrt24667-21sleep09:03:460
322772990,3chrt32278-21sh08:24:240
225732980,1sleep022574-21latency_hist09:50:000
23872960,2sleep02388-21chrt07:36:090
40362950,1sleep04038-21grep10:10:400
268472950,2chrt26849-21switchtime09:06:270
228812940,2sleep022882-21chrt11:27:000
13622920,2sleep01363-21chrt09:17:280
218422910,2sleep021840-21ntpq10:36:290
274562890,2sleep027457-21chrt09:56:340
263172890,2sleep026320-21cut12:21:070
252512880,2sleep025252-21seq11:30:580
188262870,3chrt18744-21ntp_states10:32:030
39942820,2sleep03995-21runrttasks09:21:280
78822810,2sleep07880-21irqrtprio10:16:090
182602810,2sleep018261-21chrt11:20:360
60942800,1sleep06096-21ls11:50:580
12532800,2sleep01254-21cat10:55:040
152792747,54sleep015286-21chrt07:05:280
203822700,2sleep020383-21seq12:12:080
318192690,1sleep031820-21seq10:03:110
279312690,2sleep027932-21rm11:35:150
87772670,1sleep08778-21cat11:06:020
240922660,2sleep024111-21runrttasks07:20:010
139462660,2sleep013948-21apt-key10:25:190
37022610,1sleep03703-21basename12:35:590
78042604,46sleep06417-21/usr/sbin/munin08:36:230
200482590,1sleep020052-21chrt07:12:220
102682593,7sleep010255-21ssh11:56:520
182762583,8sleep018272-21ntpq08:01:430
156632580,2sleep015661-21cat08:50:030
55222570,1sleep05523-21chrt07:41:090
286502573,44sleep028646-21ntpq07:26:100
16352573,7sleep01694-21timerwakeupswit12:32:210
162912560,2sleep016292-21chrt08:50:390
117482563,8sleep011749-21df_inode11:10:450
136652550,1sleep013667-21latency_hist10:25:080
99292533,7sleep09932-21seq08:40:330
40452533,41sleep04210-21sed08:30:460
160852522,41sleep016090-21ssh09:40:150
251922510,3chrt25181-21awk12:20:010
162482512,7sleep016252-21ssh11:17:040
134362512,7sleep013515-21wc07:55:030
3492500,2sleep0348-21seq11:41:560
242782500,4chrt24250-21ntpq09:51:510
264702490,2sleep026472-21seq08:15:140
60492480,3sleep06024-21ssh09:25:150
247782473,34sleep024787-21ntpq08:11:520
17947904318,19cyclictest15005-21/usr/sbin/munin07:56:230
1794790376,11cyclictest24852-21hddtemp_smartct07:20:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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