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2026-04-28 - 23:47

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 100 highest latencies:
System rackeslot6s.osadl.org (updated Tue Apr 28, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1255910999458,15cyclictest311ktimers/208:45:002
1255906998039,35cyclictest1256803-21latency_hist07:15:010
1255906997635,36cyclictest1268158-21munin-run08:20:000
1255906997635,36cyclictest1268158-21munin-run08:19:590
125590699743,8cyclictest1281668-21grep09:35:280
125590699743,8cyclictest1281668-21grep09:35:270
1255906997337,32cyclictest20650irq/252-8000000.ethernet08:35:240
1255906997236,28cyclictest20650irq/252-8000000.ethernet11:40:250
1255906997236,28cyclictest20650irq/252-8000000.ethernet11:40:250
1255906997129,37cyclictest0-21swapper/008:00:010
1255906997039,27cyclictest20650irq/252-8000000.ethernet09:50:180
1255906997034,30cyclictest1296077-21phc2sys11:00:250
1255906997034,30cyclictest1296077-21phc2sys11:00:250
1255906996944,20cyclictest20650irq/252-8000000.ethernet10:15:280
1255906996944,20cyclictest20650irq/252-8000000.ethernet10:15:280
1255906996938,26cyclictest1258586-21grep07:20:280
1255906996838,26cyclictest20650irq/252-8000000.ethernet08:40:270
1255906996837,27cyclictest20650irq/252-8000000.ethernet12:25:230
1255906996837,27cyclictest20650irq/252-8000000.ethernet12:25:230
1255906996836,27cyclictest1278060-21phc2sys09:15:260
1255906996828,36cyclictest1274137-21sshd08:52:490
1255909996761,4cyclictest231ktimers/108:55:001
1255906996735,27cyclictest20650irq/252-8000000.ethernet11:15:190
1255906996728,33cyclictest1289902-21/usr/sbin/munin10:25:220
125590699672,5cyclictest1269560-21irqstats08:25:230
1255906996636,24cyclictest1259552-21apt-config07:30:000
1255906996636,24cyclictest1259552-21apt-config07:30:000
1255906996624,38cyclictest0-21swapper/009:20:270
1255906996540,20cyclictest1275800-21grep09:00:270
1255906996537,24cyclictest20650irq/252-8000000.ethernet08:45:280
1255906996527,34cyclictest0-21swapper/008:05:290
1255906996527,34cyclictest0-21swapper/008:05:290
1255906996439,20cyclictest1297957-21grep11:10:280
1255906996436,24cyclictest20650irq/252-8000000.ethernet08:00:240
125590699641,57cyclictest1660-21snmpd10:35:090
1255906996336,22cyclictest20650irq/252-8000000.ethernet10:05:290
1255906996335,25cyclictest20650irq/252-8000000.ethernet09:45:250
1255906996334,26cyclictest20650irq/252-8000000.ethernet12:30:190
1255906996334,25cyclictest1302375-21sed11:40:010
125590699633,14cyclictest20850irq/208-8000000.ethernet10:20:090
1255906996316,37cyclictest0-21swapper/010:55:010
1255906996236,22cyclictest20650irq/252-8000000.ethernet11:25:160
125590699621,4cyclictest0-21swapper/007:40:110
1255906996137,21cyclictest20650irq/252-8000000.ethernet10:50:010
1255906996134,22cyclictest1309313-21latency_hist12:20:020
1255906996133,24cyclictest1262556-21sh07:45:190
1255906996131,26cyclictest1276612-21sed09:05:290
1255906996128,29cyclictest1253478-21kworker/u8:1+ext4-rsv-conversion07:30:060
1255910996050,5cyclictest1268162-21sendmail08:20:002
1255910996050,5cyclictest1268162-21sendmail08:20:002
1255909996038,15cyclictest231ktimers/108:20:131
1255906996037,20cyclictest20650irq/252-8000000.ethernet12:20:230
1255906996037,20cyclictest20650irq/252-8000000.ethernet09:00:000
1255906996037,20cyclictest20650irq/252-8000000.ethernet09:00:000
1255906996037,19cyclictest20650irq/252-8000000.ethernet10:10:240
1255906996035,21cyclictest20650irq/252-8000000.ethernet12:00:180
1255906996018,31cyclictest0-21swapper/007:40:000
1255906995950,5cyclictest0-21swapper/010:55:160
1255906995934,20cyclictest167350irq/118-8000000.ethernet-tx010:30:180
1255906995934,20cyclictest167350irq/118-8000000.ethernet-tx010:30:180
1255906995933,23cyclictest20650irq/252-8000000.ethernet11:50:170
125590699592,6cyclictest1306980-21irqstats12:05:230
125590699592,3cyclictest1277661-21ls09:15:010
125590699592,3cyclictest1277661-21ls09:15:010
125590699592,13cyclictest1257980-21cat07:20:010
1255906995846,6cyclictest167350irq/118-8000000.ethernet-tx012:10:250
1255906995844,9cyclictest1292877-21grep10:40:280
1255906995836,18cyclictest20650irq/252-8000000.ethernet11:35:010
1255909995737,14cyclictest231ktimers/109:05:141
1255906995734,19cyclictest1303718-21uname11:45:260
1255906995731,23cyclictest20650irq/252-8000000.ethernet07:50:190
1255906995729,23cyclictest1285876-21grep10:00:290
1255906995623,30cyclictest131ktimers/008:30:120
125590699551,51cyclictest0-21swapper/011:20:160
1255910995445,5cyclictest1285121-21cron10:00:002
125590699543,9cyclictest1282504-21unixbench_multi09:40:300
125590699543,10cyclictest1305598-21grep11:55:300
125590699542,9cyclictest1285082-21grep09:55:270
1255906995427,24cyclictest0-21swapper/011:05:230
125590699542,14cyclictest1312023-21grep12:35:210
125590699541,47cyclictest0-21swapper/007:10:010
1255909995313,31cyclictest231ktimers/109:50:011
1255906995332,17cyclictest20650irq/252-8000000.ethernet08:10:230
1255906995321,20cyclictest1270438-1kworker/0:2H+mmc_complete09:30:020
125590699519,38cyclictest0-21swapper/008:25:000
1255910995038,8cyclictest1289480-21apt-key10:25:002
1255909995028,15cyclictest231ktimers/111:00:141
1255909995028,15cyclictest231ktimers/111:00:141
1255906995015,5cyclictest0-21swapper/009:30:190
1255910994835,9cyclictest1312512-21sendmail12:40:002
1255910994737,5cyclictest0-21swapper/212:15:012
1255910994728,13cyclictest311ktimers/212:15:102
1255910994726,15cyclictest311ktimers/209:30:142
125590999462,14cyclictest1289363-21apt-get10:25:011
1255910994533,7cyclictest0-21swapper/211:30:002
125590999456,4cyclictest1259535-21apt-get07:30:021
125590999456,4cyclictest1259535-21apt-get07:30:011
125590999451,12cyclictest0-21swapper/111:35:201
125591099449,5cyclictest12559031cyclictest07:10:012
1255909994429,9cyclictest0-21swapper/110:15:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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