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2026-03-17 - 05:27

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 Mar 17, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
141844299733,31cyclictest1426367-21cat19:55:002
141844299692,62cyclictest0-21swapper/200:05:022
141844299692,62cyclictest0-21swapper/200:05:012
141844299601,40cyclictest0-21swapper/223:55:182
1418439995342,7cyclictest1457950-21cron23:00:000
141843999521,21cyclictest1466763-21fschecks_time23:50:200
141843999515,44cyclictest0-21swapper/019:15:010
1418442995041,5cyclictest1419243-21munin-plugin-st19:15:002
1418440995043,4cyclictest1426279-21munin-plugin-st19:55:001
1418439995041,6cyclictest1433304-21munin-plugin-st20:35:010
1418439995039,7cyclictest1440856-21unixbench_singl21:15:270
1418439995035,9cyclictest1454497-21tail22:35:280
1418440994935,9cyclictest1428803-21grep20:05:271
1418440994935,10cyclictest0-21swapper/119:55:291
1418440994935,10cyclictest0-21swapper/119:55:291
1418439994939,4cyclictest1459108-21fschecks_count23:05:190
1418439994937,8cyclictest1449403-21grep22:05:270
1418442994835,9cyclictest0-21swapper/220:30:272
1418439994841,4cyclictest167350irq/118-8000000.ethernet-tx021:00:240
1418439994834,10cyclictest0-21swapper/020:15:290
1418442994737,5cyclictest0-21swapper/223:50:002
1418442994735,8cyclictest0-21swapper/221:50:282
1418440994737,7cyclictest1461345-21sendmail23:20:001
1418439994738,6cyclictest1428815-21grep20:05:270
141844299466,25cyclictest0-21swapper/221:05:012
1418442994630,9cyclictest0-21swapper/222:00:282
1418442994630,9cyclictest0-21swapper/222:00:282
1418439994635,8cyclictest1427212-21sendmail20:00:000
1418439994635,8cyclictest1427212-21sendmail20:00:000
1418442994530,11cyclictest0-21swapper/222:25:272
1418440994526,15cyclictest231ktimers/121:25:111
141843999458,33cyclictest15-21rcuc/020:25:010
1418439994538,4cyclictest167350irq/118-8000000.ethernet-tx022:50:000
141843999453,6cyclictest1468144-21latency_hist00:00:000
1418439994535,5cyclictest0-21swapper/022:30:290
1418439994532,9cyclictest0-21swapper/021:55:280
141843999452,6cyclictest1439718-21meminfo21:10:220
141843999451,10cyclictest0-21swapper/023:15:010
1418442994437,5cyclictest1431448-21munin-plugin-st20:25:002
1418440994435,5cyclictest0-21swapper/121:35:171
1418440994434,6cyclictest1453702-21grep22:30:291
1418440994434,6cyclictest1421950-21grep19:25:281
1418440994434,5cyclictest0-21swapper/120:15:291
1418440994430,8cyclictest0-21swapper/123:30:301
1418440994429,10cyclictest0-21swapper/120:25:021
1418440994428,8cyclictest1469720-21grep00:05:261
141844099441,37cyclictest0-21swapper/100:05:011
141844099441,37cyclictest0-21swapper/100:05:011
1418439994432,9cyclictest1283-21cron19:25:010
1418439994429,11cyclictest0-21swapper/019:30:210
1418439994429,11cyclictest0-21swapper/019:30:210
141843999442,40cyclictest0-21swapper/022:10:210
141843999442,40cyclictest0-21swapper/019:40:190
1418442994330,9cyclictest1463837-21unixbench_singl23:30:292
1418442994328,8cyclictest0-21swapper/219:35:292
1418442994328,11cyclictest0-21swapper/200:10:282
1418442994328,11cyclictest0-21swapper/200:10:282
1418440994335,4cyclictest1447698-21grep21:55:281
1418440994331,8cyclictest0-21swapper/122:05:271
1418440994325,9cyclictest0-21swapper/122:35:281
141844099431,35cyclictest1653-21lldpd23:35:121
1418439994336,4cyclictest20850irq/208-8000000.ethernet21:50:000
141843999432,8cyclictest0-21swapper/000:05:010
141843999432,8cyclictest0-21swapper/000:05:010
1418439994327,9cyclictest0-21swapper/000:05:260
141843999432,10cyclictest1426276-21apt-get19:55:010
141843999431,40cyclictest0-21swapper/023:15:220
141843999431,39cyclictest0-21swapper/000:15:320
141843999431,39cyclictest0-21swapper/000:15:310
1418442994231,7cyclictest0-21swapper/219:20:282
1418442994230,8cyclictest0-21swapper/220:05:272
1418442994229,9cyclictest0-21swapper/221:35:282
1418442994227,8cyclictest0-21swapper/219:25:282
1418440994226,13cyclictest231ktimers/122:40:171
1418440994226,13cyclictest231ktimers/122:40:171
1418440994210,27cyclictest1455639-21/usr/sbin/munin22:45:181
1418439994238,2cyclictest0-21swapper/023:35:010
1418439994235,4cyclictest1444146-21cut21:35:280
1418439994233,6cyclictest1436603-21grep20:50:290
141843999422,4cyclictest0-21swapper/020:35:270
1418439994224,8cyclictest0-21swapper/019:40:010
1418442994113,23cyclictest1429944-21/usr/sbin/munin20:15:212
1418440994132,4cyclictest47-21kauditd23:00:001
1418440994130,6cyclictest0-21swapper/119:40:201
1418440994128,11cyclictest1660-21snmpd21:05:151
141844099411,23cyclictest0-21swapper/122:20:011
1418440994112,23cyclictest1427423-21/usr/sbin/munin20:00:181
1418439994127,9cyclictest1465514-21grep23:40:290
141843999412,5cyclictest1444558-21ssh21:40:170
1418439994121,11cyclictest0-21swapper/023:05:010
141843999411,3cyclictest1441289-21ssh21:20:200
141843999411,3cyclictest1441289-21ssh21:20:200
141843999411,38cyclictest0-21swapper/021:50:190
1418442994032,5cyclictest1445128-21cron21:45:002
1418442994031,5cyclictest1456279-21munin-plugin-st22:50:002
1418442994031,5cyclictest0-21swapper/222:55:002
1418442994029,8cyclictest0-21swapper/200:25:282
1418442994029,7cyclictest0-21swapper/223:05:282
1418442994027,8cyclictest0-21swapper/222:40:282
1418442994027,8cyclictest0-21swapper/222:40:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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