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2026-06-27 - 00:52

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 Fri Jun 26, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
301835399781,3cyclictest0-21swapper/008:10:130
301835399773,65cyclictest0-21swapper/008:05:230
301835399761,9cyclictest3062958-21/usr/sbin/munin11:30:170
301835399761,5cyclictest3068384-21/usr/sbin/munin12:00:260
301835399761,5cyclictest3068384-21/usr/sbin/munin12:00:250
301835399751,4cyclictest0-21swapper/012:20:140
301835399741,4cyclictest3047089-21/usr/sbin/munin09:55:260
3018353997238,29cyclictest167350irq/118-8000000.ethernet-tx009:00:280
301835399723,59cyclictest3023193-21sh07:35:200
3018353997231,37cyclictest3051540-21grep10:20:270
301835399711,5cyclictest3052297-21/usr/sbin/munin10:25:260
301835399711,5cyclictest3030093-21/usr/sbin/munin08:15:250
301835399711,4cyclictest3060563-21perl11:15:210
301835399711,4cyclictest3060563-21perl11:15:210
3018353997034,29cyclictest167350irq/118-8000000.ethernet-tx010:13:220
301835399702,6cyclictest3070647-21/usr/sbin/munin12:15:160
301835399702,3cyclictest3025865-21/usr/sbin/munin07:50:250
301835399701,66cyclictest3020255-21/usr/sbin/munin07:15:330
301835399701,66cyclictest3020255-21/usr/sbin/munin07:15:330
301835399691,5cyclictest3062486-21/usr/sbin/munin11:25:260
301835399673,4cyclictest3036953-21/usr/sbin/munin08:55:270
301835399671,5cyclictest1660-21snmpd11:40:180
3018357996612,22cyclictest30-21rcuc/208:35:012
3018357996612,22cyclictest30-21rcuc/208:35:012
3018353996637,24cyclictest167350irq/118-8000000.ethernet-tx010:30:140
3018353996625,35cyclictest0-21swapper/010:45:290
301835399661,4cyclictest0-21swapper/008:00:130
301835399661,3cyclictest3039534-21grep09:10:260
301835399661,3cyclictest3039534-21grep09:10:260
301835399661,3cyclictest3030796-21ssh08:20:200
301835399661,3cyclictest0-21swapper/008:40:010
301835399661,3cyclictest0-21swapper/008:40:010
301835399661,2cyclictest0-21swapper/009:10:010
3018353996526,6cyclictest3044671-21ptp4l-jitter09:40:270
301835399652,4cyclictest3040063-21df09:15:160
301835399651,4cyclictest3055101-21cron10:44:590
301835399644,6cyclictest3018348-21cyclictest12:40:000
3018353996424,34cyclictest0-21swapper/009:20:250
301835399631,4cyclictest0-21swapper/009:35:270
3018353996230,4cyclictest20850irq/208-8000000.ethernet11:00:170
301835399622,4cyclictest3022477-21/usr/sbin/munin07:30:270
301835399622,3cyclictest0-21swapper/011:55:180
301835399621,3cyclictest0-21swapper/012:05:160
301835399621,3cyclictest0-21swapper/010:50:220
301835399621,3cyclictest0-21swapper/009:30:140
3018357996155,4cyclictest30-21rcuc/210:15:012
3018357996155,4cyclictest30-21rcuc/210:15:012
3018353996131,26cyclictest0-21swapper/007:40:290
301835399611,3cyclictest0-21swapper/011:35:120
301835399602,4cyclictest3018584-21df_inode07:10:230
301835399601,4cyclictest3042447-21cut09:30:010
301835399601,4cyclictest0-21swapper/010:15:270
301835399601,4cyclictest0-21swapper/010:15:260
301835399601,4cyclictest0-21swapper/010:05:160
301835399601,3cyclictest0-21swapper/012:30:150
301835399601,3cyclictest0-21swapper/011:45:250
301835399601,3cyclictest0-21swapper/010:35:270
301835399601,3cyclictest0-21swapper/010:35:270
301835399601,2cyclictest0-21swapper/010:55:270
301835399591,4cyclictest0-21swapper/007:25:210
301835399591,3cyclictest0-21swapper/012:10:130
301835399591,3cyclictest0-21swapper/011:05:190
301835399591,3cyclictest0-21swapper/007:45:160
301835399591,3cyclictest0-21swapper/007:20:210
301835399591,33cyclictest0-21swapper/010:00:150
301835399581,3cyclictest3035111-21interrupts08:45:230
301835399581,3cyclictest0-21swapper/009:45:150
301835399581,3cyclictest0-21swapper/008:25:150
3018354995710,19cyclictest22-21rcuc/110:55:171
301835399571,3cyclictest0-21swapper/011:10:130
301835399571,3cyclictest0-21swapper/008:30:220
301835399551,52cyclictest0-21swapper/011:20:190
301835399551,4cyclictest0-21swapper/011:50:140
301835399551,3cyclictest0-21swapper/008:40:290
301835399541,4cyclictest0-21swapper/008:50:190
301835399532,28cyclictest3018449-21latency_hist07:10:010
301835399531,3cyclictest3026523-21lsblk07:55:210
301835399531,3cyclictest3026523-21lsblk07:55:210
301835399531,3cyclictest0-21swapper/009:50:190
301835399531,3cyclictest0-21swapper/009:50:190
3018357995237,10cyclictest311ktimers/210:30:112
3018353995133,15cyclictest167350irq/118-8000000.ethernet-tx012:25:150
3018357994940,5cyclictest3021144-21munin-plugin-st07:25:002
3018354994926,20cyclictest3048458-21/usr/sbin/munin10:05:181
3018354994834,10cyclictest231ktimers/109:00:141
3018357994731,10cyclictest0-21swapper/210:00:292
3018357994730,11cyclictest0-21swapper/208:55:002
301835799471,4cyclictest0-21swapper/211:00:192
3018354994740,4cyclictest3051642-21munin-run10:24:591
3018354994631,11cyclictest231ktimers/110:25:111
3018357994535,7cyclictest3051644-21munin-plugin-st10:24:592
3018357994532,8cyclictest0-21swapper/207:30:312
3018354994533,7cyclictest0-21swapper/109:25:011
3018354994436,4cyclictest0-21swapper/110:30:261
3018354994435,4cyclictest3058487-21munin-plugin-st11:05:001
3018354994434,7cyclictest3021924-21grep07:25:271
3018357994330,8cyclictest0-21swapper/208:05:002
3018357994326,10cyclictest0-21swapper/212:15:272
3018354994335,4cyclictest0-21swapper/109:25:271
3018354994330,7cyclictest3023571-21grep07:35:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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