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2026-08-26 - 02:46

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 Aug 25, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
136456899833,13cyclictest1376715-21apt-get08:20:022
1364568997037,28cyclictest1398805-21unixbench_singl10:25:302
1364562997062,4cyclictest0-21swapper/010:50:130
1364568996927,36cyclictest0-21swapper/209:00:312
1364568996827,36cyclictest1404687-21grep11:00:292
1364564996851,12cyclictest231ktimers/109:35:141
1364568996716,5cyclictest1393915-21/usr/sbin/munin10:00:192
1364568996644,17cyclictest1386098-21munin-plugin-st09:15:002
1364568996628,33cyclictest1369756-21unixbench_multi07:35:292
1364568996628,33cyclictest1369756-21unixbench_multi07:35:282
1364568996528,33cyclictest1390226-21grep09:35:272
1364564996539,19cyclictest231ktimers/108:05:151
1364568996429,30cyclictest0-21swapper/210:50:302
1364568996426,33cyclictest0-21swapper/211:25:292
1364562996359,2cyclictest0-21swapper/011:30:000
1364568996229,28cyclictest0-21swapper/209:05:312
136456499616,47cyclictest24-21ksoftirqd/109:05:191
1364564995938,10cyclictest0-21swapper/107:10:011
1364568995822,31cyclictest1370752-21grep07:45:002
1364568995818,31cyclictest0-21swapper/210:40:272
1364568995818,31cyclictest0-21swapper/210:40:272
1364568995813,6cyclictest0-21swapper/208:00:092
1364568995721,28cyclictest0-21swapper/212:20:292
1364562995745,7cyclictest0-21swapper/007:25:280
1364568995622,27cyclictest0-21swapper/210:40:012
1364568995619,4cyclictest0-21swapper/210:10:292
136456899555,12cyclictest0-21swapper/211:45:272
136456899555,10cyclictest0-21swapper/212:30:002
1364564995545,6cyclictest231ktimers/110:55:121
1364562995535,14cyclictest131ktimers/012:10:120
1364568995420,30cyclictest0-21swapper/207:10:252
1364568995415,33cyclictest0-21swapper/208:45:282
136456899541,27cyclictest1380158-21sshd08:36:072
136456299546,12cyclictest0-21swapper/009:10:010
1364562995418,5cyclictest0-21swapper/008:15:290
1364568995313,7cyclictest0-21swapper/210:30:272
136456899531,2cyclictest0-21swapper/211:25:022
136456899531,2cyclictest0-21swapper/211:25:022
1364564995343,5cyclictest1372493-21munin-plugin-st07:55:001
1364564995339,10cyclictest1414055-21munin-plugin-st11:59:591
1364562995345,4cyclictest167350irq/118-8000000.ethernet-tx007:20:270
136456299532,46cyclictest0-21swapper/009:55:110
1364568995219,5cyclictest0-21swapper/212:10:212
1364568995215,4cyclictest0-21swapper/211:40:192
136456899521,2cyclictest0-21swapper/212:40:002
1364564995236,11cyclictest231ktimers/107:15:121
1364562995234,12cyclictest0-21swapper/007:15:020
1364568995120,27cyclictest0-21swapper/211:05:262
136456899511,43cyclictest0-21swapper/209:21:082
136456899511,43cyclictest0-21swapper/209:21:082
1364568995017,4cyclictest0-21swapper/211:55:202
1364564995015,3cyclictest0-21swapper/109:00:011
1364562995038,9cyclictest0-21swapper/012:05:290
1364568994919,4cyclictest1383563-21latency_hist09:00:012
1364568994918,27cyclictest1391178-21munin-plugin-st09:45:002
136456899491,2cyclictest0-21swapper/208:25:282
1364564994941,4cyclictest1384420-21munin-plugin-st09:05:001
1364564994930,13cyclictest231ktimers/112:10:151
1364564994911,18cyclictest1404136-21/usr/sbin/munin11:00:201
1364562994939,6cyclictest1403922-21munin-plugin-st11:00:010
136456299493,4cyclictest1386672-21uname09:15:260
136456299491,44cyclictest1390325-21sendmail09:40:000
1364568994816,24cyclictest0-21swapper/208:10:002
136456899481,3cyclictest0-21swapper/210:05:182
1364564994839,6cyclictest231ktimers/112:30:151
1364564994827,13cyclictest231ktimers/110:20:091
1364564994812,13cyclictest0-21swapper/112:25:021
136456299483,3cyclictest0-21swapper/010:35:260
136456299482,5cyclictest1371115-21sh07:45:200
136456299482,42cyclictest1395263-21mailstats10:05:300
1364568994739,5cyclictest1369028-21munin-plugin-st07:35:012
1364562994740,4cyclictest167350irq/118-8000000.ethernet-tx011:15:290
1364562994731,11cyclictest0-21swapper/011:35:210
136456299472,5cyclictest1396601-21diskstats10:15:190
1364564994633,7cyclictest0-21swapper/111:20:291
1364564994633,7cyclictest0-21swapper/111:20:291
1364564994616,21cyclictest22-21rcuc/107:15:011
1364562994638,4cyclictest167350irq/118-8000000.ethernet-tx012:20:250
136456299462,7cyclictest1400833-21df_inode10:40:180
136456299462,7cyclictest1400833-21df_inode10:40:180
1364568994516,4cyclictest0-21swapper/212:15:272
1364568994515,19cyclictest1386296-21/usr/sbin/munin09:15:182
1364564994536,5cyclictest1413213-21munin-plugin-st11:55:001
1364562994538,4cyclictest0-21swapper/009:10:150
1364562994535,6cyclictest1420810-21grep12:35:290
136456299452,6cyclictest1414327-21df12:00:160
136456299451,38cyclictest0-21swapper/008:00:010
1364568994430,10cyclictest0-21swapper/207:15:282
1364568994416,24cyclictest0-21swapper/207:20:192
1364564994434,5cyclictest0-21swapper/107:45:291
1364564994430,10cyclictest0-21swapper/111:05:281
136456299445,17cyclictest15-21rcuc/009:05:000
1364562994435,4cyclictest167350irq/118-8000000.ethernet-tx010:45:240
136456299441,8cyclictest0-21swapper/009:30:010
1364568994313,5cyclictest1415035-21ls12:05:022
1364562994334,5cyclictest1391635-21/usr/sbin/munin09:45:220
1364562994333,6cyclictest20850irq/208-8000000.ethernet11:50:280
136456299433,13cyclictest12-21ksoftirqd/010:15:020
136456299432,6cyclictest1394216-21meminfo10:00:250
1364562994326,12cyclictest131ktimers/009:30:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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