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2025-11-17 - 10:36

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 Mon Nov 17, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1725920998779,5cyclictest231ktimers/120:30:201
1725920998779,5cyclictest231ktimers/120:30:201
172592499833,51cyclictest0-21swapper/222:15:012
172591899791,40cyclictest0-21swapper/000:35:150
1725924997430,35cyclictest1742560-21munin-plugin-st20:45:002
1725918997432,4cyclictest1762288-21unixbench_singl22:35:300
1725918997334,6cyclictest0-21swapper/023:05:340
172591899721,38cyclictest0-21swapper/023:50:010
1725918997033,8cyclictest0-21swapper/021:05:300
1725924996922,39cyclictest0-21swapper/219:45:222
1725924996235,21cyclictest0-21swapper/200:05:002
1725920996215,41cyclictest22-21rcuc/121:40:211
172591899616,18cyclictest21250irq/208-8000000.ethernet19:10:010
1725924996032,23cyclictest1772465-21sendmail23:40:002
1725924996032,23cyclictest0-21swapper/220:30:282
1725924996032,23cyclictest0-21swapper/220:30:282
172592499591,14cyclictest1759924-21apt-get22:25:162
172592499582,14cyclictest1768444-21apt-get23:15:182
172592499582,14cyclictest1768444-21apt-get23:15:182
1725924995815,34cyclictest0-21swapper/222:20:302
1725924995815,34cyclictest0-21swapper/222:20:302
172592499581,15cyclictest1761693-21apt-get22:35:172
1725924995721,32cyclictest1734123-21/usr/sbin/munin19:55:122
1725924995710,38cyclictest0-21swapper/220:25:312
1725924995710,37cyclictest0-21swapper/221:00:312
1725920995747,5cyclictest0-21swapper/120:50:301
172592499565,6cyclictest0-21swapper/223:55:142
1725924995622,29cyclictest0-21swapper/221:10:232
1725918995645,6cyclictest0-21swapper/019:35:280
1725918995645,6cyclictest0-21swapper/019:35:280
172592499555,41cyclictest0-21swapper/222:15:292
172592499552,10cyclictest1767352-21grep23:05:332
172592499541,10cyclictest1748678-21/usr/sbin/munin21:20:342
1725918995445,6cyclictest1775842-21sendmail00:00:000
172592499536,37cyclictest0-21swapper/219:50:292
172592499535,40cyclictest0-21swapper/219:30:322
172592499535,38cyclictest0-21swapper/219:35:292
172592499535,38cyclictest0-21swapper/219:35:292
172592499532,8cyclictest1768170-21/usr/sbin/munin23:10:312
172592499532,11cyclictest1772979-21meminfo23:40:252
172592499531,46cyclictest0-21swapper/200:05:272
1725924995312,31cyclictest0-21swapper/222:50:302
172592499531,10cyclictest1753510-21grep21:45:292
172592499524,8cyclictest1782672-21cron00:40:002
172592499523,6cyclictest1770717-21grep23:25:302
1725924995220,26cyclictest1726782-21sshd19:14:462
172592499521,3cyclictest0-21swapper/220:50:472
172592499521,11cyclictest1739207-21wc20:25:012
172592499521,10cyclictest1752669-21tail21:40:302
1725924995210,35cyclictest0-21swapper/200:35:022
1725924995210,35cyclictest0-21swapper/200:35:022
172592099523,19cyclictest1739090-21apt-get20:25:011
172592499518,35cyclictest0-21swapper/221:15:322
172592499512,8cyclictest1773687-21cut23:45:252
172592499512,8cyclictest1734984-21apt-get20:00:192
172592499511,9cyclictest1744738-21/usr/sbin/munin20:55:252
1725924995117,27cyclictest1728135-21/usr/sbin/munin19:20:282
1725924995117,27cyclictest1728135-21/usr/sbin/munin19:20:282
1725924995113,31cyclictest0-21swapper/221:25:312
1725924995113,30cyclictest0-21swapper/219:25:282
172592499511,11cyclictest1771109-21/usr/sbin/munin23:30:242
172592499511,11cyclictest1751290-21apt-get21:35:202
172592499511,11cyclictest1751290-21apt-get21:35:202
1725924995110,31cyclictest0-21swapper/219:15:282
1725920995133,11cyclictest231ktimers/120:00:161
172591899517,8cyclictest0-21swapper/021:25:010
172592499501,9cyclictest1766220-21/usr/sbin/munin23:00:252
172592499501,9cyclictest1766220-21/usr/sbin/munin23:00:252
172592499501,9cyclictest1761074-21/usr/sbin/munin22:30:262
1725924995013,27cyclictest0-21swapper/219:45:012
1725924995012,32cyclictest1668-21snmpd00:11:242
172592499492,9cyclictest1763033-21/usr/sbin/munin22:40:292
172592499492,11cyclictest1737594-21apt-get20:15:172
172592499491,9cyclictest1736057-21/usr/sbin/munin20:05:262
1725924994911,30cyclictest0-21swapper/222:00:322
172592499491,12cyclictest1779175-21/usr/sbin/munin00:15:302
172592099496,21cyclictest1732442-21/usr/sbin/munin19:45:211
172592499486,5cyclictest0-21swapper/223:20:302
172592499486,33cyclictest0-21swapper/220:45:292
172592499486,33cyclictest0-21swapper/220:45:292
172592499483,6cyclictest1746732-21grep21:05:302
172592499482,8cyclictest1725972-21apt-key19:10:002
172592499482,7cyclictest1750358-21munin-node21:30:122
172592499482,7cyclictest1750358-21munin-node21:30:122
172592499482,6cyclictest1779991-21grep00:20:332
1725924994824,18cyclictest0-21swapper/223:00:002
172592499482,11cyclictest1774597-21/usr/sbin/munin23:50:232
172592499481,9cyclictest1754663-21munin-node21:55:162
1725924994814,26cyclictest0-21swapper/220:10:222
172592499481,10cyclictest1763625-21/usr/sbin/munin22:45:232
172592499481,10cyclictest1763625-21/usr/sbin/munin22:45:232
1725918994839,6cyclictest21050irq/252-8000000.ethernet19:15:020
172592499471,9cyclictest1781082-21latency_hist00:30:012
172591899471,36cyclictest0-21swapper/021:45:180
172592499461,7cyclictest1753886-21/usr/sbin/munin21:50:182
172592099468,27cyclictest22-21rcuc/121:40:011
172592099468,27cyclictest22-21rcuc/121:40:011
1725920994629,10cyclictest0-21swapper/122:45:281
1725920994629,10cyclictest0-21swapper/122:45:281
172592499455,11cyclictest0-21swapper/222:05:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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