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2026-05-22 - 22:44

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 highest latencies:
System rack4slot1s.osadl.org (updated Fri May 22, 2026 18:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1851421510,2sleep20-21swapper/217:44:462
1851421510,2sleep20-21swapper/217:44:462
560521380,3sleep00-21swapper/018:13:530
560521380,3sleep00-21swapper/018:13:530
560521380,3sleep00-21swapper/018:13:530
2743021300,2chrt27425-21sort18:10:160
2743021300,2chrt27425-21sort18:10:160
2743021300,2chrt27425-21sort18:10:160
2734421240,3sleep20-21swapper/218:15:022
2734421240,3sleep20-21swapper/218:15:022
2734421240,3sleep20-21swapper/218:15:022
843321170,2chrt8425-21pipe17:31:260
843321170,2chrt8425-21pipe17:31:260
843321170,2chrt8425-21pipe17:31:260
1559321160,1sleep30-21swapper/318:14:233
1559321160,1sleep30-21swapper/318:14:233
1559321160,1sleep30-21swapper/318:14:233
626021140,2sleep20-21swapper/217:23:442
626021140,2sleep20-21swapper/217:23:442
626021140,2sleep20-21swapper/217:23:442
2279121140,2chrt0-21swapper/218:11:322
2279121140,2chrt0-21swapper/218:11:322
2279121140,2chrt0-21swapper/218:11:322
1128921130,2sleep20-21swapper/218:04:502
1128921130,2sleep20-21swapper/218:04:502
920221100,2chrt0-21swapper/218:01:182
920221100,2chrt0-21swapper/218:01:182
2263821070,3sleep122649-21sh18:14:481
2263821070,3sleep122649-21sh18:14:481
2263821070,3sleep122649-21sh18:14:481
1022921060,3sleep19614-21pipe18:02:511
1022921060,3sleep19614-21pipe18:02:511
1407321040,2sleep014076-21sh17:41:280
1407321040,2sleep014076-21sh17:41:280
1240521040,3sleep30-21swapper/317:44:273
1240521040,3sleep30-21swapper/317:44:273
647821030,2chrt6420-21fstime17:26:121
647821030,2chrt6420-21fstime17:26:121
647821030,2chrt6420-21fstime17:26:121
1968521030,3sleep119692-21multi.sh18:09:571
1968521030,3sleep119692-21multi.sh18:09:571
1968521030,3sleep119692-21multi.sh18:09:571
67202980,2sleep16563-21execl17:52:391
67202980,2sleep16563-21execl17:52:391
67202980,2sleep16563-21execl17:52:391
101162980,5chrt10125-21sh17:44:211
101162980,5chrt10125-21sh17:44:211
81372960,2sleep20-21swapper/217:28:142
81372960,2sleep20-21swapper/217:28:142
81372960,2sleep20-21swapper/217:28:142
70912950,2sleep20-21swapper/217:55:182
70912950,2sleep20-21swapper/217:55:182
70912950,2sleep20-21swapper/217:55:182
87792940,2sleep18710-21pipe17:32:441
87792940,2sleep18710-21pipe17:32:441
87792940,2sleep18710-21pipe17:32:441
206622870,1sleep10-21swapper/117:36:581
206622870,1sleep10-21swapper/117:36:581
317152860,4sleep131717-21sh17:42:171
317152860,4sleep131717-21sh17:42:171
58942850,2sleep10-21swapper/117:22:181
58942850,2sleep10-21swapper/117:22:181
83602830,2sleep20-21swapper/217:36:512
83602830,2sleep20-21swapper/217:36:512
312762800,2chrt0-21swapper/318:11:533
312762800,2chrt0-21swapper/318:11:533
312762800,2chrt0-21swapper/318:11:533
59502770,2sleep20-21swapper/217:42:392
59502770,2sleep20-21swapper/217:42:392
66942760,3sleep06559-21execl17:52:380
66942760,3sleep06559-21execl17:52:380
66942760,3sleep06559-21execl17:52:380
69122710,2sleep16899-21execl17:53:281
69122710,2sleep16899-21execl17:53:281
69122710,2sleep16899-21execl17:53:281
238492710,2sleep023852-21sh17:45:010
238492710,2sleep023852-21sh17:45:010
92632670,3sleep10-21swapper/118:01:391
92632670,3sleep10-21swapper/118:01:391
93752590,3sleep00-21swapper/018:02:220
93752590,3sleep00-21swapper/018:02:220
63902590,2chrt6348-21fstime17:25:100
63902590,2chrt6348-21fstime17:25:100
63902590,2chrt6348-21fstime17:25:100
65702580,3chrt0-21swapper/317:52:173
65702580,3chrt0-21swapper/317:52:173
65702580,3chrt0-21swapper/317:52:173
256582570,3sleep30-21swapper/318:05:513
256582570,3sleep30-21swapper/318:05:513
130582560,4sleep1271rcuc/118:32:341
130582560,4sleep1271rcuc/118:32:341
182472520,2chrt18250-21unixbench_singl18:42:561
182472520,2chrt18250-21unixbench_singl18:42:561
182472520,2chrt18250-21unixbench_singl18:42:561
153462500,3sleep10-21swapper/118:37:451
88972480,3sleep30-21swapper/317:58:383
88972480,3sleep30-21swapper/317:58:383
66702480,2sleep20-21swapper/217:52:362
66702480,2sleep20-21swapper/217:52:362
66702480,2sleep20-21swapper/217:52:362
112482470,2sleep011231-21context118:04:360
112482470,2sleep011231-21context118:04:360
133252460,3sleep20-21swapper/218:32:432
133252460,3sleep20-21swapper/218:32:432
85412450,3chrt0-21swapper/317:32:223
85412450,3chrt0-21swapper/317:32:223
85412450,3chrt0-21swapper/317:32:223
69052450,3chrt6899-21execl17:53:230
69052450,3chrt6899-21execl17:53:230
69052450,3chrt6899-21execl17:53:230
68702440,2sleep30-21swapper/317:53:103
68702440,2sleep30-21swapper/317:53:103
68702440,2sleep30-21swapper/317:53:103
121772440,3chrt0-21swapper/317:35:313
121772440,3chrt0-21swapper/317:35:313
14512420,3sleep30-21swapper/317:42:233
14512420,3sleep30-21swapper/317:42:233
60102410,3sleep20-21swapper/217:22:352
60102410,3sleep20-21swapper/217:22:352
191302415,26sleep019282-21ls18:47:460
99982390,3sleep00-21swapper/018:22:500
99982390,3sleep00-21swapper/018:22:500
99982390,3sleep00-21swapper/018:22:500
118862390,2sleep013881-21spawn17:36:540
118862390,2sleep013881-21spawn17:36:540
46799381,34cyclictest15452-21sed18:37:461
46799381,34cyclictest15452-21sed18:37:461
467993328,4cyclictest14678-21systemd-journal18:22:321
467993328,4cyclictest14678-21systemd-journal18:22:321
157172290,3chrt0-21swapper/218:37:502
157172290,3chrt0-21swapper/218:37:502
466992722,4cyclictest439-21cyclictest17:22:170
466992722,4cyclictest439-21cyclictest17:22:170
466992722,3cyclictest0-21swapper/018:32:320
466992722,3cyclictest0-21swapper/018:32:320
467992618,6cyclictest14280-21ls18:32:541
467992618,6cyclictest14280-21ls18:32:541
467992517,6cyclictest10750-21unixbench_singl18:22:571
467992517,6cyclictest10750-21unixbench_singl18:22:571
467992517,6cyclictest10750-21unixbench_singl18:22:571
466992518,5cyclictest16269-21unixbench-2d18:37:560
466992518,5cyclictest16269-21unixbench-2d18:37:560
466992215,5cyclictest18786-21latency_hist18:47:420
466992215,5cyclictest18786-21latency_hist18:47:420
468992115,4cyclictest138742sleep218:32:472
468992115,4cyclictest138742sleep218:32:472
468992115,4cyclictest138742sleep218:32:472
63572200,4chrt0-21swapper/317:24:453
63572200,4chrt0-21swapper/317:24:453
63572200,4chrt0-21swapper/317:24:453
466992015,3cyclictest0-21swapper/018:32:510
466992015,3cyclictest0-21swapper/018:32:510
466992015,3cyclictest0-21swapper/018:32:510
46699201,11cyclictest8513-21mailstats18:17:540
46699201,11cyclictest8513-21mailstats18:17:540
46999193,9cyclictest0-21swapper/318:18:403
46999193,9cyclictest0-21swapper/318:18:403
46999171,12cyclictest16805-21chrt18:42:333
46999171,12cyclictest16805-21chrt18:42:333
46999161,9cyclictest12111-21chrt18:27:503
46999161,9cyclictest12111-21chrt18:27:503
46899163,9cyclictest0-21swapper/218:25:402
46899163,9cyclictest0-21swapper/218:25:402
46899163,9cyclictest0-21swapper/218:25:402
46899163,9cyclictest0-21swapper/218:18:402
46899163,9cyclictest0-21swapper/218:18:402
46999159,4cyclictest105522sleep318:22:573
46999159,4cyclictest105522sleep318:22:573
46999159,4cyclictest105522sleep318:22:573
468991511,3cyclictest0-21swapper/218:46:392
468991511,3cyclictest0-21swapper/218:46:392
468991511,3cyclictest0-21swapper/218:46:392
46999141,11cyclictest5896-21taskset17:22:203
46999141,11cyclictest5896-21taskset17:22:203
46999141,10cyclictest0-21swapper/318:47:443
46999141,10cyclictest0-21swapper/318:47:443
46999141,10cyclictest0-21swapper/318:47:443
46999139,2cyclictest0-21swapper/318:37:153
46999139,2cyclictest0-21swapper/318:37:153
46999139,2cyclictest0-21swapper/318:37:153
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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