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2026-05-26 - 22:49

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 Tue May 26, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81555899120113,4cyclictest15-21rcuc/010:30:020
815561998238,10cyclictest0-21swapper/108:30:001
81556299757,27cyclictest834777-21cat09:00:012
81556199706,39cyclictest825382-21cat08:05:011
815558996961,6cyclictest15-21rcuc/010:30:010
815558996755,6cyclictest862158-21sshd11:40:120
815561996511,24cyclictest22-21rcuc/107:35:011
81556299641,34cyclictest863831-21/usr/sbin/munin11:50:192
815558996136,12cyclictest15-21rcuc/007:40:010
815558996136,12cyclictest15-21rcuc/007:40:010
815562995844,9cyclictest0-21swapper/208:05:002
81556299571,25cyclictest858784-21/usr/sbin/munin11:20:192
81555899576,4cyclictest813137-21kworker/u8:1+events_freezable_power_07:10:010
815561995543,8cyclictest861944-21sendmail11:40:011
815562995444,4cyclictest832135-21munin-plugin-st08:45:012
815562995412,18cyclictest839264-21/usr/sbin/munin09:25:192
81556299537,13cyclictest0-21swapper/208:35:022
815561995135,10cyclictest0-21swapper/109:50:181
815561995118,5cyclictest2471459-1kworker/1:2H+kblockd09:10:111
815562995039,6cyclictest0-21swapper/211:35:002
81556299502,18cyclictest311ktimers/210:05:192
81556299502,18cyclictest311ktimers/210:05:192
815558995040,7cyclictest858569-21munin-plugin-st11:20:000
815558995030,16cyclictest0-21swapper/011:30:220
81555899502,4cyclictest818351-21apt-get07:25:010
81555899501,10cyclictest831148-21find08:35:280
815561994938,8cyclictest848354-21sendmail10:20:001
815561994934,7cyclictest0-21swapper/107:55:281
815562994835,8cyclictest0-21swapper/208:25:002
81555899483,4cyclictest0-21swapper/007:20:000
81556299478,16cyclictest0-21swapper/212:30:012
815562994734,8cyclictest0-21swapper/211:10:282
81556199471,38cyclictest0-21swapper/110:20:281
815558994736,5cyclictest824139-21grep07:55:250
81556299467,4cyclictest0-21swapper/210:50:022
815562994634,7cyclictest863633-21munin-plugin-st11:50:002
815562994632,9cyclictest0-21swapper/207:25:022
81556299462,17cyclictest848652-21/usr/sbin/munin10:20:172
81556299461,22cyclictest0-21swapper/212:15:022
815561994634,7cyclictest0-21swapper/108:20:271
815558994639,4cyclictest0-21swapper/009:00:080
815558994628,14cyclictest167350irq/118-8000000.ethernet-tx011:10:120
81555899461,6cyclictest0-21swapper/009:20:000
81555899461,4cyclictest825504-21latency_hist08:05:000
815562994528,11cyclictest0-21swapper/210:10:292
815561994530,7cyclictest0-21swapper/109:30:291
815558994540,3cyclictest0-21swapper/007:50:100
815558994538,4cyclictest167350irq/118-8000000.ethernet-tx012:18:030
815558994537,4cyclictest870725-21cat12:30:000
815558994534,6cyclictest845705-21grep10:00:280
815558994526,14cyclictest131ktimers/009:40:120
81555899451,41cyclictest0-21swapper/011:45:190
815562994436,5cyclictest816365-21munin-plugin-st07:15:002
815562994430,9cyclictest0-21swapper/209:10:002
81556299441,17cyclictest0-21swapper/208:50:012
815561994437,4cyclictest839908-21munin-plugin-st09:30:011
815561994436,5cyclictest835598-21munin-plugin-st09:05:001
815561994435,5cyclictest870563-21munin-plugin-st12:30:001
815561994433,6cyclictest0-21swapper/112:15:161
815561994431,8cyclictest836543-21cat09:10:001
815561994429,10cyclictest0-21swapper/107:10:191
81555899447,5cyclictest15-21rcuc/008:45:200
815558994438,3cyclictest838835-21tail09:20:260
815558994437,4cyclictest167350irq/118-8000000.ethernet-tx008:10:300
815558994424,17cyclictest847978-21uname10:15:210
81555899441,7cyclictest1653-21lldpd07:40:190
81555899441,7cyclictest1653-21lldpd07:40:180
815562994333,7cyclictest867935-21munin-plugin-st12:15:002
815561994329,9cyclictest0-21swapper/110:50:201
81556199431,31cyclictest0-21swapper/111:00:301
815558994334,5cyclictest0-21swapper/009:30:280
81555899432,39cyclictest0-21swapper/007:25:250
815561994229,8cyclictest0-21swapper/111:55:281
815561994227,9cyclictest0-21swapper/112:05:021
815561994227,10cyclictest0-21swapper/111:15:291
81556199422,31cyclictest0-21swapper/109:45:281
815558994236,4cyclictest167350irq/118-8000000.ethernet-tx011:20:280
815558994235,4cyclictest167350irq/118-8000000.ethernet-tx009:00:020
815558994235,3cyclictest819810-21phc2sys07:30:270
815558994226,14cyclictest167350irq/118-8000000.ethernet-tx012:00:130
815558994225,15cyclictest0-21swapper/010:10:150
81555899422,4cyclictest0-21swapper/009:45:210
81555899421,5cyclictest837096-21grep09:10:270
81555899421,35cyclictest0-21swapper/009:40:020
81555899421,12cyclictest835937-21grep09:05:190
815562994132,5cyclictest823550-21sed07:50:282
815562994131,4cyclictest0-21swapper/209:45:272
81556299411,4cyclictest0-21swapper/211:45:012
815562994114,21cyclictest2-21kthreadd12:37:212
815561994132,5cyclictest820979-21sendmail07:40:011
815561994132,5cyclictest820979-21sendmail07:40:001
815561994131,6cyclictest833704-21unixbench_multi08:50:301
815561994126,9cyclictest0-21swapper/109:25:011
81556199411,30cyclictest842382-21unixbench_singl09:40:281
81555899417,9cyclictest0-21swapper/012:35:010
815558994135,4cyclictest0-21swapper/007:45:120
815558994135,3cyclictest167350irq/118-8000000.ethernet-tx009:25:120
81555899413,34cyclictest828650-21grep08:20:270
81555899412,4cyclictest848342-21apt-get10:20:020
81555899411,4cyclictest0-21swapper/008:20:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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