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2026-08-06 - 01:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 rackeslot6s.osadl.org (updated Wed Aug 05, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
541852991613,143cyclictest0-21swapper/011:29:390
5418559911975,20cyclictest311ktimers/211:29:402
54185899929,5cyclictest545619-21apt-get08:30:023
541854997059,8cyclictest231ktimers/111:29:401
54185499638,22cyclictest231ktimers/111:25:021
54185499634,20cyclictest548559-21apt-get09:35:011
541854995743,11cyclictest231ktimers/110:15:131
541855995444,8cyclictest30-21rcuc/209:35:022
541855995444,6cyclictest543419-21sendmail07:40:012
541855995347,4cyclictest311ktimers/209:55:212
541854995221,24cyclictest22-21rcuc/110:50:011
541854995221,24cyclictest22-21rcuc/110:50:011
541855995142,5cyclictest547020-21run-parts09:00:012
541854994940,4cyclictest546580-21kworker/u8:1-events_power_efficient08:55:001
541852994939,6cyclictest167350irq/118-8000000.ethernet-tx011:10:010
541855994730,9cyclictest0-21swapper/212:10:292
54185299471,3cyclictest555403-21grep10:25:010
541854994628,8cyclictest22-21rcuc/107:15:021
541852994636,6cyclictest0-21swapper/009:10:000
541852994636,6cyclictest0-21swapper/009:10:000
54185499452,33cyclictest546359-21kworker/u8:3+rpciod08:50:011
541852994539,3cyclictest0-21swapper/011:35:120
541852994539,2cyclictest0-21swapper/012:20:190
541852994539,2cyclictest0-21swapper/012:20:190
541852994528,14cyclictest167350irq/118-8000000.ethernet-tx012:25:120
541854994436,4cyclictest562919-21munin-plugin-st11:10:011
541855994333,6cyclictest555140-21grep10:20:282
541855994321,14cyclictest311ktimers/211:30:132
541855994321,14cyclictest311ktimers/211:30:132
54185499432,32cyclictest578870-21mailstats12:35:301
541852994336,5cyclictest554394-21sendmail10:20:000
541852994335,4cyclictest0-21swapper/008:29:590
541852994328,9cyclictest0-21swapper/012:20:020
54185299431,36cyclictest0-21swapper/009:15:000
541855994230,6cyclictest0-21swapper/211:05:222
541855994229,8cyclictest0-21swapper/210:10:282
541855994220,14cyclictest311ktimers/211:45:152
541854994230,10cyclictest231ktimers/108:40:011
541854994223,10cyclictest0-21swapper/111:40:281
541852994223,14cyclictest0-21swapper/012:05:030
541852994223,14cyclictest0-21swapper/012:05:020
54185299421,6cyclictest555503-21df_inode10:25:170
54185299421,3cyclictest568897-21/usr/sbin/munin11:40:190
54185299421,34cyclictest0-21swapper/011:25:010
541855994133,5cyclictest568687-21run-parts11:39:592
541855994128,7cyclictest0-21swapper/210:40:012
541854994129,7cyclictest0-21swapper/110:55:291
541854994125,10cyclictest0-21swapper/111:59:591
541852994134,5cyclictest553541-21munin-plugin-st10:15:000
541852994134,4cyclictest167350irq/118-8000000.ethernet-tx007:15:010
54185299412,5cyclictest571468-21df11:55:160
54185299411,7cyclictest0-21swapper/010:00:260
54185299411,3cyclictest0-21swapper/011:15:160
54185299411,38cyclictest0-21swapper/007:45:000
54185599408,11cyclictest572294-21/usr/sbin/munin12:00:212
541855994032,5cyclictest542033-21grep07:15:002
541855994031,5cyclictest0-21swapper/212:15:292
541855994031,5cyclictest0-21swapper/212:15:282
541855994028,9cyclictest543863-21munin-plugin-st07:50:012
541855994027,10cyclictest0-21swapper/210:05:292
541855994019,14cyclictest311ktimers/211:15:142
541854994026,10cyclictest0-21swapper/108:09:591
541854994017,11cyclictest231ktimers/110:05:131
541852994035,3cyclictest167350irq/118-8000000.ethernet-tx012:10:210
541852994033,4cyclictest0-21swapper/010:55:250
541852994032,4cyclictest167350irq/118-8000000.ethernet-tx010:05:300
541852994031,5cyclictest20850irq/208-8000000.ethernet11:00:210
541852994031,5cyclictest20850irq/208-8000000.ethernet10:45:210
54185299401,9cyclictest0-21swapper/012:00:200
541855993924,9cyclictest559451-21grep10:45:282
541854993930,5cyclictest0-21swapper/111:15:341
541854993926,5cyclictest0-21swapper/107:15:021
541854993920,12cyclictest231ktimers/112:05:131
541854993920,12cyclictest231ktimers/112:05:131
541852993934,3cyclictest0-21swapper/012:15:130
541852993931,4cyclictest0-21swapper/012:35:230
541852993924,11cyclictest0-21swapper/012:35:010
541852993923,14cyclictest0-21swapper/009:55:310
54185299391,36cyclictest0-21swapper/011:30:150
54185299391,36cyclictest0-21swapper/011:30:150
541855993826,8cyclictest0-21swapper/211:10:272
541855993821,10cyclictest311ktimers/212:30:132
541854993826,8cyclictest1283-21cron07:55:011
541854993821,12cyclictest231ktimers/109:50:081
54185299381,35cyclictest0-21swapper/010:40:120
54185299381,35cyclictest0-21swapper/009:20:010
541855993728,5cyclictest167550irq/134-8000000.ethernet-tx210:55:222
541855993727,4cyclictest547909-21munin-plugin-st09:20:002
541855993726,7cyclictest551760-21grep10:00:302
541855993718,13cyclictest311ktimers/211:55:112
541854993727,5cyclictest0-21swapper/107:35:001
541854993724,8cyclictest557657-21grep10:35:301
541854993723,9cyclictest0-21swapper/111:45:211
54185499371,2cyclictest0-21swapper/109:45:001
541852993730,3cyclictest0-21swapper/011:10:190
541852993723,9cyclictest0-21swapper/008:20:010
54185299371,34cyclictest0-21swapper/011:50:110
54185299371,34cyclictest0-21swapper/011:45:160
54185299371,34cyclictest0-21swapper/007:23:350
541855993624,8cyclictest0-21swapper/212:25:292
541855993615,15cyclictest167550irq/134-8000000.ethernet-tx207:50:362
54185599361,30cyclictest0-21swapper/210:25:262
54185499365,26cyclictest231ktimers/110:30:011
541854993627,6cyclictest231ktimers/110:40:261
541854993626,6cyclictest577245-21unixbench_multi12:25:281
541854993626,6cyclictest548684-21apt-key09:35:011
541854993623,9cyclictest231ktimers/110:30:131
541854993623,8cyclictest574625-21grep12:10:291
541854993620,9cyclictest0-21swapper/111:30:221
541854993620,9cyclictest0-21swapper/111:30:221
541854993620,10cyclictest0-21swapper/110:25:001
541852993626,5cyclictest0-21swapper/010:35:280
54185299361,4cyclictest1660-21snmpd09:22:470
54185299361,33cyclictest0-21swapper/010:50:260
54185299361,33cyclictest0-21swapper/010:50:260
541855993527,4cyclictest0-21swapper/209:35:002
541855993522,6cyclictest0-21swapper/211:50:282
541854993530,3cyclictest543410-21sh07:40:001
541854993527,4cyclictest544296-21sendmail08:00:001
54185499351,4cyclictest0-21swapper/108:45:021
541852993529,4cyclictest20850irq/208-8000000.ethernet08:45:010
541852993528,4cyclictest20850irq/208-8000000.ethernet09:35:010
541852993528,4cyclictest19750irq/27-20000000.i2c10:30:270
54185299351,3cyclictest0-21swapper/008:55:350
54185299351,3cyclictest0-21swapper/007:50:010
54185299351,32cyclictest0-21swapper/009:46:290
54185299351,32cyclictest0-21swapper/008:31:060
54185299351,32cyclictest0-21swapper/007:18:010
54185299351,27cyclictest0-21swapper/009:30:010
541855993422,9cyclictest0-21swapper/212:35:292
541855993416,13cyclictest575875-21/usr/sbin/munin12:20:182
541855993416,13cyclictest575875-21/usr/sbin/munin12:20:172
541854993424,5cyclictest167450irq/126-8000000.ethernet-tx107:28:041
541854993422,8cyclictest568610-21grep11:35:301
541854993422,8cyclictest559439-21grep10:45:281
541854993421,8cyclictest0-21swapper/111:50:271
54185499341,2cyclictest0-21swapper/108:25:001
541854993410,13cyclictest22-21rcuc/109:50:011
541852993428,4cyclictest0-21swapper/007:53:540
541852993427,4cyclictest871-21systemd-resolve08:01:330
541852993427,4cyclictest871-21systemd-resolve08:01:330
54185299341,3cyclictest0-21swapper/007:55:450
54185299341,31cyclictest0-21swapper/007:33:100
541855993327,3cyclictest554524-21latency_hist10:20:002
541855993325,5cyclictest558530-21grep10:40:292
541855993321,8cyclictest0-21swapper/209:15:002
541855993316,12cyclictest311ktimers/209:50:092
54185599331,3cyclictest0-21swapper/207:10:002
54185599331,27cyclictest0-21swapper/211:40:162
541854993322,7cyclictest0-21swapper/112:20:011
541854993322,7cyclictest0-21swapper/112:20:011
541854993321,7cyclictest0-21swapper/107:45:001
541854993314,4cyclictest8321systemd-network12:30:381
54185499331,2cyclictest0-21swapper/111:05:011
541852993328,3cyclictest0-21swapper/007:10:010
541852993328,2cyclictest0-21swapper/008:25:000
541852993327,4cyclictest0-21swapper/009:37:070
54185299331,30cyclictest0-21swapper/008:14:510
541855993225,3cyclictest546754-21latency_hist08:50:002
541855993224,5cyclictest542472-21df07:15:052
541855993224,5cyclictest0-21swapper/211:20:292
54185599321,3cyclictest0-21swapper/209:50:012
541854993225,4cyclictest22-21rcuc/108:30:011
541854993222,7cyclictest0-21swapper/112:05:021
541852993217,4cyclictest119987-1kworker/0:1H+kblockd07:40:010
54185299321,4cyclictest550113-21grep09:50:240
54185299321,3cyclictest0-21swapper/009:41:120
541855993121,7cyclictest0-21swapper/210:50:302
541855993121,7cyclictest0-21swapper/210:50:302
54185599311,3cyclictest0-21swapper/209:10:012
54185599311,3cyclictest0-21swapper/209:10:012
54185599311,28cyclictest0-21swapper/211:00:162
541854993118,9cyclictest22-21rcuc/110:00:151
54185499311,4cyclictest0-21swapper/109:00:011
541854993111,4cyclictest8321systemd-network08:14:501
541852993115,14cyclictest0-21swapper/009:01:460
541852993115,14cyclictest0-21swapper/008:54:410
54185299311,28cyclictest0-21swapper/008:39:070
541855993022,4cyclictest0-21swapper/208:30:012
541855993019,6cyclictest0-21swapper/210:30:302
541855993017,10cyclictest311ktimers/212:05:062
541855993017,10cyclictest311ktimers/212:05:062
54185499302,22cyclictest0-21swapper/107:49:271
541854993021,6cyclictest0-21swapper/112:20:281
541854993021,6cyclictest0-21swapper/112:20:281
541854993021,6cyclictest0-21swapper/108:35:011
541854993018,8cyclictest231ktimers/110:10:111
54185299301,3cyclictest0-21swapper/008:07:460
541855992913,10cyclictest542762-21sh07:25:002
541855992911,9cyclictest0-21swapper/208:15:012
541854992921,6cyclictest0-21swapper/109:30:011
541854992921,6cyclictest0-21swapper/109:25:021
541854992920,7cyclictest550359-21/usr/sbin/munin09:55:211
54185499291,22cyclictest1660-21snmpd09:08:201
54185499291,22cyclictest1660-21snmpd09:08:201
541852992923,4cyclictest131ktimers/007:28:000
54185299291,26cyclictest0-21swapper/008:45:400
54185599281,22cyclictest0-21swapper/207:25:492
541854992822,4cyclictest51-21kcompactd007:10:011
54185499282,18cyclictest545316-21latency_hist08:20:011
54185499281,7cyclictest0-21swapper/108:05:021
54185499281,7cyclictest0-21swapper/108:05:011
54185499281,5cyclictest0-21swapper/107:25:011
541855992720,5cyclictest543730-21latency_hist07:45:012
541855992717,6cyclictest0-21swapper/208:35:012
541854992717,6cyclictest0-21swapper/111:10:271
54185499271,21cyclictest0-21swapper/109:11:581
541855992619,5cyclictest0-21swapper/208:20:012
541854992616,5cyclictest0-21swapper/109:20:011
541855992516,5cyclictest544511-21sshd08:03:052
541855992516,5cyclictest544511-21sshd08:03:052
541855992514,7cyclictest0-21swapper/208:09:592
541855992514,5cyclictest311ktimers/207:35:012
541855992417,4cyclictest0-21swapper/208:25:012
541855992416,4cyclictest0-21swapper/209:25:012
541855992415,5cyclictest864-21systemd-logind09:26:322
541854992416,5cyclictest231ktimers/109:05:001
541855992317,4cyclictest311ktimers/208:40:012
541855992315,6cyclictest549092-21cron09:45:002
541855992315,5cyclictest0-21swapper/208:00:002
541855992314,7cyclictest0-21swapper/208:55:002
541855992116,4cyclictest0-21swapper/209:02:172
541855992015,3cyclictest543848-21kworker/u8:1+flush-179:9608:40:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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