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2026-03-19 - 01:43

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 Mar 18, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2747201995914,12cyclictest2749347-21/usr/sbin/munin07:20:202
274719799587,21cyclictest0-21swapper/010:25:010
2747200995741,12cyclictest231ktimers/109:25:121
2747197995611,8cyclictest14-21rcu_preempt11:20:010
2747197995611,8cyclictest14-21rcu_preempt11:20:010
2747200995541,9cyclictest2766929-21grep09:00:281
2747197995520,9cyclictest14-21rcu_preempt12:05:010
274720199547,34cyclictest0-21swapper/208:25:012
274719799541,51cyclictest0-21swapper/010:40:110
274719799511,5cyclictest0-21swapper/009:20:010
2747200994934,10cyclictest2764361-21grep08:45:291
2747200994916,28cyclictest231ktimers/111:40:241
2747197994937,9cyclictest0-21swapper/011:55:270
2747201994835,9cyclictest0-21swapper/210:10:272
2747200994829,10cyclictest0-21swapper/110:45:261
2747200994828,16cyclictest231ktimers/107:45:111
2747197994834,9cyclictest0-21swapper/011:00:020
2747200994730,8cyclictest0-21swapper/111:25:251
2747200994726,15cyclictest0-21swapper/109:20:211
274719799471,3cyclictest2764322-21grep08:45:280
2747200994631,7cyclictest0-21swapper/108:35:201
2747200994629,12cyclictest0-21swapper/109:35:191
2747200994622,12cyclictest231ktimers/107:30:191
2747197994639,4cyclictest2761805-21munin-plugin-st08:35:000
2747200994534,7cyclictest2765180-21grep08:50:281
2747200994528,7cyclictest0-21swapper/110:50:201
2747200994525,11cyclictest231ktimers/111:05:141
2747197994537,5cyclictest20850irq/208-8000000.ethernet08:55:260
2747197994531,10cyclictest0-21swapper/009:10:270
2747201994435,5cyclictest0-21swapper/209:20:292
2747201994430,8cyclictest311ktimers/207:30:122
2747201994428,9cyclictest0-21swapper/208:15:292
2747201994428,9cyclictest0-21swapper/208:15:292
274720099448,19cyclictest2747192-21cyclictest07:50:111
2747200994434,7cyclictest0-21swapper/109:15:281
2747200994433,7cyclictest2787324-21grep11:00:281
2747200994432,8cyclictest2752445-21grep07:35:271
2747200994432,8cyclictest2752445-21grep07:35:261
2747200994432,8cyclictest0-21swapper/111:30:281
2747200994432,8cyclictest0-21swapper/111:30:281
2747200994430,8cyclictest0-21swapper/110:20:281
2747200994429,8cyclictest0-21swapper/112:30:191
2747200994426,10cyclictest0-21swapper/108:40:271
2747200994425,6cyclictest0-21swapper/108:10:191
2747197994436,4cyclictest20850irq/208-8000000.ethernet12:20:280
2747197994433,7cyclictest0-21swapper/009:45:280
2747197994428,11cyclictest0-21swapper/008:40:270
2747201994336,5cyclictest2792465-21munin-plugin-st11:35:002
2747201994336,5cyclictest2792465-21munin-plugin-st11:35:002
2747200994333,7cyclictest231ktimers/107:15:281
2747200994331,8cyclictest231ktimers/110:10:111
2747200994328,7cyclictest0-21swapper/108:00:201
2747200994326,11cyclictest0-21swapper/111:10:201
2747197994336,4cyclictest2800068-21sendmail12:20:000
2747197994331,8cyclictest0-21swapper/007:20:300
274719799432,9cyclictest0-21swapper/008:25:000
2747201994227,10cyclictest2786377-21grep10:55:272
2747200994230,7cyclictest231ktimers/112:00:261
2747200994226,9cyclictest2775363-21grep09:50:281
2747200994225,8cyclictest0-21swapper/112:20:281
2747200994224,10cyclictest0-21swapper/111:20:271
2747197994229,7cyclictest0-21swapper/010:30:270
2747197994227,9cyclictest0-21swapper/010:45:270
2747197994226,10cyclictest0-21swapper/012:10:280
2747197994226,10cyclictest0-21swapper/012:10:280
274719799421,2cyclictest0-21swapper/009:05:010
2747201994132,5cyclictest2773721-21munin-plugin-st09:45:002
2747201994128,9cyclictest0-21swapper/210:45:272
2747201994127,9cyclictest0-21swapper/211:35:282
2747201994125,10cyclictest0-21swapper/211:25:012
2747200994127,6cyclictest0-21swapper/110:55:251
2747200994127,10cyclictest0-21swapper/110:05:271
2747200994126,8cyclictest0-21swapper/110:30:011
2747200994123,10cyclictest0-21swapper/107:20:291
2747200994119,11cyclictest0-21swapper/112:10:201
2747200994119,11cyclictest0-21swapper/112:10:201
2747197994131,6cyclictest0-21swapper/011:10:260
2747197994126,9cyclictest0-21swapper/008:20:010
2747197994126,9cyclictest0-21swapper/008:20:010
274719799411,3cyclictest0-21swapper/009:10:000
274720199407,23cyclictest30-21rcuc/212:30:012
2747200994028,6cyclictest0-21swapper/111:35:171
2747200994023,9cyclictest0-21swapper/107:25:281
274720099401,4cyclictest0-21swapper/108:59:591
274719799403,35cyclictest0-21swapper/008:50:240
2747197994032,5cyclictest20850irq/208-8000000.ethernet11:25:270
2747197994030,6cyclictest0-21swapper/007:44:590
2747197994029,7cyclictest0-21swapper/009:30:280
2747197994029,7cyclictest0-21swapper/009:30:280
2747197994025,11cyclictest0-21swapper/011:40:180
2747197994024,10cyclictest0-21swapper/007:55:260
274719799401,37cyclictest0-21swapper/009:55:260
2747201993928,8cyclictest0-21swapper/210:45:002
2747201993925,10cyclictest0-21swapper/208:00:192
2747200993928,4cyclictest0-21swapper/112:05:251
274720099392,22cyclictest2748021-21munin-node07:15:011
274720099392,22cyclictest2748021-21munin-node07:15:011
2747200993921,10cyclictest0-21swapper/111:45:221
2747197993928,8cyclictest0-21swapper/009:20:290
2747197993928,7cyclictest0-21swapper/007:10:280
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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