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2026-07-25 - 02:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

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 100 highest latencies:
System rack7slot3s.osadl.org (updated Fri Jul 24, 2026 12:43:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
161959915947,90cyclictest18086-21grep10:55:540
16195991552,127cyclictest27174-21diskmemload11:40:400
16195991431,79cyclictest0-21swapper/012:30:360
16195991431,79cyclictest0-21swapper/012:30:360
161959913043,81cyclictest646-21rt-features09:55:550
161959912927,71cyclictest0-21swapper/011:35:470
16196991235,87cyclictest19068-21cat12:15:521
16196991235,87cyclictest19068-21cat12:15:521
16196991143,81cyclictest32169-21apt-get09:55:411
16196991127,64cyclictest13967-21ntp_states11:30:481
161959911034,55cyclictest0-21swapper/012:15:500
161959911034,55cyclictest0-21swapper/012:15:500
16195991097,85cyclictest0-21swapper/009:30:360
16195991097,85cyclictest0-21swapper/009:30:360
161959910932,70cyclictest30401-21ssh11:50:480
161959910756,36cyclictest7950irq/56-dwc_otg_11:30:460
161959910735,65cyclictest28458-21latency_hist10:30:250
161959910735,65cyclictest28458-21latency_hist10:30:250
16195991065,70cyclictest0-21swapper/012:35:450
16197991032,9cyclictest7850irq/56-dwc_otg09:55:542
16196991023,70cyclictest27174-21diskmemload11:35:471
16195991006,60cyclictest0-21swapper/012:05:280
161959910027,57cyclictest28756-21grep09:10:510
161959910025,61cyclictest16876-21tail09:35:510
1619899998,13cyclictest8050irq/56-dwc_otg_11:40:383
16195999726,59cyclictest0-21swapper/008:10:370
16195999525,51cyclictest5038-21unixbench_multi10:00:510
16195999524,56cyclictest22219-21cut12:20:380
98162930,6sleep31619899cyclictest11:25:473
16196999312,56cyclictest0-21swapper/111:40:371
89512920,9sleep0101ktimersoftd/011:25:240
16198999112,18cyclictest0-21swapper/309:55:553
1619799912,13cyclictest19078-21ls12:15:522
1619799912,13cyclictest19078-21ls12:15:522
16195999126,48cyclictest17573-21ssh12:15:230
16195999122,53cyclictest27028-21rm12:25:490
16195999120,59cyclictest0-21swapper/011:49:380
16195999120,59cyclictest0-21swapper/011:49:380
1619699903,67cyclictest0-21swapper/112:35:431
1619699892,57cyclictest18006-21ssh10:55:531
16195998924,51cyclictest12379-21cron10:50:220
1619799887,17cyclictest7850irq/56-dwc_otg12:35:442
1619799884,10cyclictest0-21swapper/211:35:472
16195998826,44cyclictest16547-21find08:40:240
16195998819,58cyclictest0-21swapper/008:15:390
16195998818,55cyclictest0-21swapper/009:15:360
16195998724,41cyclictest16444-21gpgv08:40:240
16195998624,38cyclictest31848-21latency_hist09:55:230
16195998526,46cyclictest9356-21cut11:25:410
16195998522,54cyclictest4418-21ssh11:20:010
16195998522,40cyclictest5298-21modprobe08:10:220
1619699843,74cyclictest28499-21ssh10:30:261
16196998428,49cyclictest28371-21latency_hist10:30:241
16196998428,49cyclictest28371-21latency_hist10:30:241
16195998428,33cyclictest32675-21/usr/sbin/munin10:35:490
16195998427,42cyclictest8924-21ssh12:04:580
16195998424,12cyclictest25371-21apt09:05:230
16195998424,12cyclictest25371-21apt09:05:230
16195998417,52cyclictest8754-21modprobe11:25:230
1619799834,19cyclictest21616-21cpuspeed11:40:402
16195998323,52cyclictest0-21swapper/008:24:170
16195998320,54cyclictest0-21swapper/009:21:560
16195998243,29cyclictest8691-21/usr/sbin/munin10:05:460
16195998229,48cyclictest13622-21/usr/sbin/munin10:50:490
16195998224,41cyclictest27611-21cat07:40:420
16195998222,47cyclictest15428-21taskset10:14:380
1619599821,40cyclictest0-21swapper/007:15:350
16195998123,46cyclictest31135-21ssh11:12:050
16195998119,50cyclictest0-21swapper/009:41:240
136822810,5sleep11619699cyclictest08:30:481
16195998026,37cyclictest6528-21ssh10:42:120
16195998021,43cyclictest0-21swapper/010:25:220
16195998021,33cyclictest0-21swapper/007:35:230
16196997911,47cyclictest27289-21timerandwakeup12:25:521
16196997813,42cyclictest5269-21sh09:22:001
16195997824,44cyclictest31592-21sh10:33:590
16195997819,45cyclictest0-21swapper/007:12:210
1619699775,66cyclictest8705-21ntp_states10:05:471
1619699773,49cyclictest0-21swapper/111:50:481
16195997722,40cyclictest22479-21ssh11:01:160
16195997722,40cyclictest22479-21ssh11:01:160
16195997624,41cyclictest25881-21fschecks_count09:05:390
16195997618,39cyclictest0-21swapper/011:55:540
1619699741,58cyclictest9007-21ssh11:25:281
16195997418,41cyclictest0-21swapper/009:47:000
16195997317,47cyclictest750-21snmpd09:25:490
16195997317,42cyclictest0-21swapper/007:54:300
16195997317,42cyclictest0-21swapper/007:54:300
16195997315,41cyclictest0-21swapper/010:17:260
221822720,2sleep30-21swapper/309:42:523
16196997216,35cyclictest25573-21df_inode07:35:411
1619699721,44cyclictest22377-21df_inode12:20:401
16195997227,43cyclictest25822-21kernelversion07:35:450
16195997221,38cyclictest0-21swapper/007:45:420
16195997219,39cyclictest0-21swapper/008:51:230
16195997219,38cyclictest2057-21wc08:00:380
103152720,2sleep30-21swapper/312:05:463
307672710,3sleep20-21swapper/210:32:272
1619799711,28cyclictest0-21swapper/211:15:372
1619699711,56cyclictest28898-21sh11:49:421
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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