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2026-05-27 - 10:50

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 Wed May 27, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1256568997511,15cyclictest1286847-21/usr/sbin/munin22:05:181
1256568997063,5cyclictest0-21swapper/119:10:011
1256568996828,34cyclictest0-21swapper/120:20:301
1256566996556,5cyclictest0-21swapper/022:15:140
125656899629,16cyclictest0-21swapper/123:35:021
125656899601,24cyclictest0-21swapper/100:40:011
125657299585,39cyclictest1261200-21gpg-connect-age19:35:012
125657299585,39cyclictest1261200-21gpg-connect-age19:35:012
1256572995849,5cyclictest1309626-21munin-plugin-st00:19:592
1256568995718,11cyclictest1258716-21/usr/sbin/munin19:20:191
1256568995718,11cyclictest1258716-21/usr/sbin/munin19:20:191
1256566995346,4cyclictest20650irq/252-8000000.ethernet00:15:000
1256566995346,4cyclictest20650irq/252-8000000.ethernet00:15:000
1256566995345,4cyclictest167350irq/118-8000000.ethernet-tx022:25:020
1256566995244,5cyclictest15-21rcuc/019:10:020
1256566995244,5cyclictest1282252-21grep21:35:300
1256572995141,7cyclictest1260197-21munin-plugin-st19:30:012
1256572995141,5cyclictest1297621-21munin-plugin-st23:10:002
1256566995143,4cyclictest20650irq/252-8000000.ethernet19:55:280
1256572995040,7cyclictest1310480-21munin-plugin-st00:25:002
1256572995038,8cyclictest0-21swapper/220:15:282
1256566995043,4cyclictest131ktimers/021:05:020
1256566995042,5cyclictest1278104-21munin-plugin-st21:14:590
1256566994840,5cyclictest1309525-21unixbench_multi00:15:290
1256566994840,5cyclictest1262912-21munin-plugin-st19:45:010
1256566994840,4cyclictest20650irq/252-8000000.ethernet22:55:180
1256572994731,9cyclictest0-21swapper/219:10:282
125656899471,38cyclictest1281374-21unixbench_multi21:30:301
125656899471,38cyclictest1281374-21unixbench_multi21:30:301
125656899471,10cyclictest0-21swapper/122:55:021
1256566994738,5cyclictest167350irq/118-8000000.ethernet-tx020:05:250
125656699472,5cyclictest1260695-21meminfo19:30:230
125656699472,5cyclictest1260695-21meminfo19:30:230
1256566994716,26cyclictest0-21swapper/000:00:020
125656899461,39cyclictest1277155-21unixbench_multi21:05:281
125656699468,13cyclictest12-21ksoftirqd/020:25:020
1256566994640,4cyclictest131ktimers/023:25:250
1256566994640,4cyclictest0-21swapper/021:45:100
1256566994638,4cyclictest20650irq/252-8000000.ethernet23:35:010
1256566994637,6cyclictest167350irq/118-8000000.ethernet-tx023:40:170
125656699462,5cyclictest1257389-21munin-node19:15:020
125656699461,42cyclictest1304858-21fschecks_time23:50:220
125656899459,4cyclictest1306149-21apt-get00:00:011
1256566994537,4cyclictest167350irq/118-8000000.ethernet-tx000:00:190
125656699452,40cyclictest0-21swapper/019:15:170
1256572994433,7cyclictest0-21swapper/223:50:002
1256572994430,9cyclictest0-21swapper/219:15:292
1256568994428,12cyclictest0-21swapper/122:00:301
1256566994438,3cyclictest20650irq/252-8000000.ethernet23:05:210
1256566994437,4cyclictest167350irq/118-8000000.ethernet-tx022:10:160
1256566994437,3cyclictest1267514-21fschecks_time20:10:210
1256566994436,5cyclictest20650irq/252-8000000.ethernet20:35:190
1256566994436,5cyclictest0-21swapper/022:00:000
1256566994431,9cyclictest0-21swapper/021:20:290
1256572994337,3cyclictest1259-21in:imklog19:25:012
1256572994337,3cyclictest1259-21in:imklog19:25:002
1256572994331,8cyclictest0-21swapper/223:00:292
1256572994330,8cyclictest0-21swapper/223:25:182
1256572994327,9cyclictest0-21swapper/222:10:282
1256568994323,10cyclictest231ktimers/120:00:291
1256568994323,10cyclictest231ktimers/120:00:291
1256566994337,3cyclictest1272770-21proc_pri20:40:260
1256566994335,6cyclictest0-21swapper/022:50:190
1256566994335,5cyclictest20650irq/252-8000000.ethernet21:30:300
1256566994335,5cyclictest20650irq/252-8000000.ethernet21:30:300
125656699432,5cyclictest1278361-21df21:15:170
125656699431,5cyclictest1270963-21irqstats20:30:240
125656699431,39cyclictest0-21swapper/000:30:230
1256572994229,9cyclictest0-21swapper/220:45:282
1256568994229,8cyclictest0-21swapper/119:35:261
1256566994235,4cyclictest20650irq/252-8000000.ethernet22:00:290
1256566994235,4cyclictest167350irq/118-8000000.ethernet-tx019:45:260
1256566994224,16cyclictest0-21swapper/000:25:210
125656699422,38cyclictest14-21rcu_preempt21:40:250
125656699422,38cyclictest14-21rcu_preempt21:40:250
1256572994132,5cyclictest47-21kauditd23:20:002
1256572994130,7cyclictest0-21swapper/220:00:182
1256572994130,7cyclictest0-21swapper/220:00:182
1256572994129,8cyclictest0-21swapper/221:20:012
1256572994129,7cyclictest0-21swapper/222:25:302
1256566994135,3cyclictest20650irq/252-8000000.ethernet21:05:130
1256566994135,3cyclictest167350irq/118-8000000.ethernet-tx020:25:200
1256566994134,4cyclictest20650irq/252-8000000.ethernet22:30:270
1256566994134,4cyclictest20650irq/252-8000000.ethernet21:30:000
1256566994134,4cyclictest20650irq/252-8000000.ethernet20:00:160
1256566994134,4cyclictest20650irq/252-8000000.ethernet20:00:160
1256566994133,4cyclictest20650irq/252-8000000.ethernet22:45:260
125656699412,3cyclictest1293388-21sshd22:42:170
125656699412,3cyclictest1293388-21sshd22:42:170
1256572994027,8cyclictest0-21swapper/221:05:282
1256572994026,7cyclictest0-21swapper/221:35:272
1256568994031,4cyclictest1311219-21grep00:25:261
125656899401,5cyclictest1291646-21unixbench_singl22:30:301
1256566994034,3cyclictest1287268-21cut22:05:260
1256566994033,4cyclictest20650irq/252-8000000.ethernet23:35:290
1256566994033,4cyclictest20650irq/252-8000000.ethernet20:50:220
1256566994033,4cyclictest20650irq/252-8000000.ethernet20:50:220
1256566994025,10cyclictest0-21swapper/021:55:010
125656699402,36cyclictest0-21swapper/023:45:230
125656699401,37cyclictest0-21swapper/023:15:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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