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2026-08-11 - 09:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 376 highest latencies:
System rack4slot1s.osadl.org (updated Tue Aug 11, 2026 06:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
295421480,2chrt0-21swapper/306:04:123
295421480,2chrt0-21swapper/306:04:123
283221380,5sleep02797-21pipe06:04:090
283221380,5sleep02797-21pipe06:04:090
367021360,3sleep13673-21sh05:42:271
367021360,3sleep13673-21sh05:42:271
367021360,3sleep13673-21sh05:42:271
367021360,3sleep13673-21sh05:42:271
2873521360,3sleep028739-21sh05:46:480
2873521360,3sleep028739-21sh05:46:480
716821330,1sleep30-21swapper/306:14:033
716821330,1sleep30-21swapper/306:14:033
2257721320,2sleep022596-21sh06:14:530
2257721320,2sleep022596-21sh06:14:530
3074821210,3sleep130744-21od06:13:341
3074821210,3sleep130744-21od06:13:341
3074821210,3sleep130744-21od06:13:341
1898121180,3chrt18977-21od06:13:050
1898121180,3chrt18977-21od06:13:050
1898121180,3chrt18977-21od06:13:050
840221170,2sleep30-21swapper/306:12:353
840221170,2sleep30-21swapper/306:12:353
840221170,2sleep30-21swapper/306:12:353
1690121140,2sleep129-21ksoftirqd/105:44:421
1690121140,2sleep129-21ksoftirqd/105:44:421
1616721130,2sleep116177-21multi.sh06:16:151
1616721130,2sleep116177-21multi.sh06:16:151
356421120,2sleep10-21swapper/105:35:391
1292721120,3sleep112947-21spawn06:07:321
1292721120,3sleep112947-21spawn06:07:321
3189721080,2sleep031876-21fstime05:56:030
1887421080,1sleep2351rcuc/205:46:222
1887421080,1sleep2351rcuc/205:46:222
2816521070,3sleep028168-21multi.sh05:43:390
2816521070,3sleep028168-21multi.sh05:43:390
2816521070,3sleep028168-21multi.sh05:43:390
2816521070,3sleep028168-21multi.sh05:43:390
151821050,1chrt1466-21fstime05:30:321
3170421020,2chrt0-21swapper/305:54:163
143221020,3chrt0-21swapper/205:29:332
161521010,3sleep20-21swapper/206:02:372
161521010,3sleep20-21swapper/206:02:372
3192721000,2sleep20-21swapper/205:56:252
37512990,2chrt0-21swapper/206:06:242
37512990,2chrt0-21swapper/206:06:242
67702970,3chrt0-21swapper/305:45:463
67702970,3chrt0-21swapper/305:45:463
135342950,3sleep20-21swapper/206:16:072
135342950,3sleep20-21swapper/206:16:072
17742930,1sleep00-21swapper/005:33:050
16252930,3chrt1610-21pipe06:02:441
16252930,3chrt1610-21pipe06:02:441
260002920,2sleep20-21swapper/205:43:332
260002920,2sleep20-21swapper/205:43:332
260002920,2sleep20-21swapper/205:43:332
260002920,2sleep20-21swapper/205:43:332
311282880,2sleep30-21swapper/305:43:503
311282880,2sleep30-21swapper/305:43:503
311282880,2sleep30-21swapper/305:43:503
311282880,2sleep30-21swapper/305:43:503
309192820,6chrt30534-21execl05:54:021
301532800,2chrt30145-21execl05:53:301
301532800,2chrt30145-21execl05:53:301
53072740,2sleep20-21swapper/206:13:572
53072740,2sleep20-21swapper/206:13:572
53072740,2sleep20-21swapper/206:13:572
301772730,3sleep20-21swapper/206:23:562
301772730,3sleep20-21swapper/206:23:562
301772730,3sleep20-21swapper/206:23:562
22332710,2sleep20-21swapper/205:33:552
16572580,2chrt0-21swapper/306:02:543
16572580,2chrt0-21swapper/306:02:543
303482560,2sleep030141-21execl05:53:540
15852500,6chrt1577-21pipe06:02:270
15852500,6chrt1577-21pipe06:02:270
301502470,2sleep30-21swapper/305:53:283
301502470,2sleep30-21swapper/305:53:283
301492460,3sleep20-21swapper/205:53:272
301492460,3sleep20-21swapper/205:53:272
26122993526,7cyclictest2768-21needreboot05:34:020
301672331,7sleep030141-21execl05:53:420
26122993327,3cyclictest0-21swapper/006:23:460
26122993327,3cyclictest0-21swapper/006:23:460
26128992925,2cyclictest0-21swapper/106:43:461
26128992923,4cyclictest90-1pr/ttyS006:36:531
26128992923,4cyclictest90-1pr/ttyS006:36:531
2612999277,3cyclictest9242chrt06:33:012
2612999277,3cyclictest9242chrt06:33:012
26128992722,3cyclictest90-1pr/ttyS006:45:531
26128992722,3cyclictest90-1pr/ttyS006:45:531
26128992722,3cyclictest90-1pr/ttyS006:31:471
26128992722,3cyclictest90-1pr/ttyS006:31:471
2613099263,15cyclictest0-21swapper/305:37:233
26128992620,3cyclictest0-21swapper/106:23:531
26128992620,3cyclictest0-21swapper/106:23:531
26122992619,5cyclictest32059-21fschecks_time06:29:000
26122992619,5cyclictest32059-21fschecks_time06:29:000
26122992418,4cyclictest0-21swapper/006:43:460
26122992417,5cyclictest5623-21missed_timers06:44:020
26122992417,5cyclictest5623-21missed_timers06:44:020
26122992317,4cyclictest0-21swapper/006:34:090
26122992317,4cyclictest0-21swapper/006:34:090
26128992218,3cyclictest90-1pr/ttyS006:27:591
26128992218,3cyclictest90-1pr/ttyS006:27:591
26128992218,3cyclictest90-1pr/ttyS006:27:591
26122992014,4cyclictest30195-21gltestperf06:23:560
26122992014,4cyclictest30195-21gltestperf06:23:560
26122992014,4cyclictest30195-21gltestperf06:23:560
2612999193,9cyclictest0-21swapper/206:20:182
2612999193,9cyclictest0-21swapper/206:20:182
15002190,3sleep30-21swapper/305:30:183
52382180,4sleep30-21swapper/306:43:593
52382180,4sleep30-21swapper/306:43:593
2613099171,11cyclictest32437-21taskset06:29:043
2613099171,11cyclictest32437-21taskset06:29:043
2613099162,10cyclictest0-21swapper/306:41:183
2612999161,11cyclictest5586-21chrt06:44:022
2612999161,11cyclictest5586-21chrt06:44:022
2612999161,11cyclictest1972-21chrt06:34:052
2612999161,11cyclictest1972-21chrt06:34:052
2613099141,8cyclictest30308-21taskset06:23:573
2613099141,8cyclictest30308-21taskset06:23:573
2613099141,8cyclictest30308-21taskset06:23:573
2612999143,8cyclictest0-21swapper/206:39:182
2613099131,7cyclictest0-21swapper/306:33:583
2613099131,7cyclictest0-21swapper/306:33:583
2613099127,3cyclictest292182chrt06:19:073
2613099127,3cyclictest292182chrt06:19:073
plot10:48:588
setyrange[0.8:*]5
setylabel"Numberoflatencysamples"6
setxrange[0:400]4
setxlabel"Latencyus-Maximumusplottedon2
settitle"Latencyrack4slot1s"0
setterminalpbmcolor1
setoutput"r4s1s.ppm"7
setlogscaley3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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