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2026-08-15 - 15:14

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 Sat Aug 15, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
52037099846,40cyclictest0-21swapper/022:30:010
520370998411,40cyclictest0-21swapper/022:05:010
52037099821,65cyclictest0-21swapper/020:15:110
520370997428,40cyclictest0-21swapper/020:20:150
520374997362,8cyclictest0-21swapper/222:30:012
520370996930,35cyclictest558027-21ps22:45:240
520370996816,46cyclictest0-21swapper/022:10:220
520370996734,26cyclictest533749-21/usr/sbin/munin20:25:200
520370996633,9cyclictest545154-21/usr/sbin/munin21:30:250
520370996532,26cyclictest527957-21memory19:50:250
520370996532,26cyclictest527957-21memory19:50:240
520370996513,46cyclictest0-21swapper/020:50:020
520370996429,4cyclictest570562-21df00:00:170
520370996334,3cyclictest560262-21df_inode23:00:190
520370996235,25cyclictest524681-21ptp4l19:30:240
520370996034,23cyclictest0-21swapper/022:25:010
520370996031,15cyclictest0-21swapper/000:05:120
520370996029,3cyclictest541641-21memory21:10:250
520370996022,35cyclictest556738-21cpu22:40:160
520370996021,6cyclictest0-21swapper/023:50:100
520370995829,3cyclictest545629-21df_inode21:35:190
520370995829,3cyclictest521855-21/usr/sbin/munin19:15:240
520370995828,27cyclictest531358-21grep20:10:260
520370995738,14cyclictest0-21swapper/020:35:170
520370995722,31cyclictest554716-21grep22:25:280
520370995646,7cyclictest559633-21/usr/sbin/munin22:55:220
520370995628,26cyclictest526603-21sshd19:42:360
520370995627,3cyclictest539730-21df_inode21:00:180
520370995627,3cyclictest539730-21df_inode21:00:180
520370995615,3cyclictest577238-21ls00:40:010
520370995539,12cyclictest549291-21/usr/sbin/munin21:55:270
520370995529,3cyclictest566440-21irqstats23:35:240
520370995528,3cyclictest561475-21/usr/sbin/munin23:05:260
520370995526,3cyclictest567038-21apt23:40:120
520370995443,8cyclictest529116-21sshd19:56:560
520370995441,9cyclictest568255-21/usr/sbin/munin23:45:270
520370995437,13cyclictest0-21swapper/000:25:130
520370995431,13cyclictest0-21swapper/021:45:110
520370995427,24cyclictest523152-21apt-get19:25:050
520370995426,3cyclictest539201-21/usr/sbin/munin20:55:280
520370995425,27cyclictest548399-21memory21:50:250
520370995421,31cyclictest534903-21ptp4l20:30:240
520370995415,32cyclictest559276-21latency_hist22:55:020
520374995338,11cyclictest0-21swapper/219:25:002
52037199537,16cyclictest22-21rcuc/100:15:021
52037199537,16cyclictest22-21rcuc/100:15:021
520370995341,8cyclictest543120-21/usr/sbin/munin21:20:190
520370995330,20cyclictest563118-21/usr/sbin/munin23:15:230
520370995324,3cyclictest573324-21memory00:15:240
520370995321,29cyclictest562031-21diskstats23:10:160
520370995320,26cyclictest566168-21date23:35:020
520370995318,3cyclictest552546-21df22:15:160
520370995235,13cyclictest0-21swapper/000:20:140
520370995225,3cyclictest520933-21/usr/sbin/munin19:10:310
520370995225,24cyclictest575704-21/usr/sbin/munin00:30:190
520370995222,3cyclictest543936-21/usr/sbin/munin21:25:150
520370995222,27cyclictest550860-21cut22:05:200
520371995143,5cyclictest532518-21run-parts20:20:001
520371995140,5cyclictest523155-21munin-plugin-st19:25:001
520370995145,4cyclictest564919-21/usr/sbin/munin23:25:260
520370995135,10cyclictest569906-21/usr/sbin/munin23:55:190
520370995134,3cyclictest555945-21diskstats22:35:190
520370995129,17cyclictest542526-21cut21:15:250
520371995031,13cyclictest1283-21cron21:39:591
520370995043,4cyclictest546421-21apt-get21:40:110
520370995043,4cyclictest546421-21apt-get21:40:110
520370995040,7cyclictest529510-21ssh20:00:220
520370995033,13cyclictest564079-21/usr/sbin/munin23:20:260
520370995033,13cyclictest564079-21/usr/sbin/munin23:20:260
520370995012,35cyclictest0-21swapper/020:40:220
520374994941,4cyclictest547900-21munin-plugin-st21:50:002
520370994939,8cyclictest0-21swapper/019:35:130
520370994935,9cyclictest530486-21/usr/sbin/munin20:05:240
520370994931,14cyclictest527127-21/usr/sbin/munin19:45:220
520370994923,24cyclictest522573-21df19:20:170
520370994919,3cyclictest538225-21irqstats20:50:240
520371994840,4cyclictest47-21kauditd23:10:001
520370994837,8cyclictest572180-21munin-node00:10:090
520370994837,8cyclictest572180-21munin-node00:10:090
520370994835,10cyclictest540703-21/usr/sbin/munin21:05:210
52037499472,5cyclictest0-21swapper/221:55:192
520371994725,15cyclictest231ktimers/122:15:101
520374994637,5cyclictest0-21swapper/223:05:292
520374994632,9cyclictest0-21swapper/223:55:002
520374994628,11cyclictest0-21swapper/222:05:272
520371994632,9cyclictest0-21swapper/120:50:011
520374994535,5cyclictest537927-21grep20:50:012
52037199454,11cyclictest0-21swapper/123:05:011
520374994432,8cyclictest0-21swapper/220:30:012
520371994433,8cyclictest538569-21grep20:50:291
52037499431,23cyclictest0-21swapper/221:30:012
520371994330,9cyclictest0-21swapper/121:40:271
520371994330,9cyclictest0-21swapper/121:40:271
520371994324,11cyclictest0-21swapper/120:00:291
520371994235,4cyclictest0-21swapper/123:20:201
520371994235,4cyclictest0-21swapper/123:20:201
52037199423,23cyclictest564499-21/usr/sbin/munin23:25:181
520371994231,7cyclictest570301-21sendmail00:00:011
520371994228,9cyclictest0-21swapper/121:50:211
520371994219,16cyclictest231ktimers/119:15:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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