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2026-08-05 - 04:22

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 Aug 04, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3888390997250,17cyclictest0-21swapper/107:10:011
3888390997244,23cyclictest3910376-21munin-plugin-st09:15:001
3888390996726,33cyclictest0-21swapper/111:15:281
388839099661,43cyclictest0-21swapper/110:25:011
3888390996328,31cyclictest3913695-21grep09:30:291
3888390996321,33cyclictest0-21swapper/110:20:191
388839099631,55cyclictest3945268-21sshd12:39:021
3888390996219,37cyclictest0-21swapper/107:55:291
3888390996119,36cyclictest0-21swapper/108:10:011
388839099601,4cyclictest0-21swapper/109:30:011
388838799595,22cyclictest15-21rcuc/007:35:010
388838799595,22cyclictest15-21rcuc/007:35:010
388839099583,47cyclictest3925121-21cut10:40:211
388839099582,47cyclictest3914822-21apt-get09:40:161
388839099582,10cyclictest3908860-21cat09:05:011
3888390995625,26cyclictest3893954-21sshd07:40:011
388839099562,13cyclictest3926635-21apt-get10:50:151
3888390995527,21cyclictest0-21swapper/108:15:031
3888390995511,36cyclictest0-21swapper/110:00:261
388839099546,39cyclictest3924625-21grep10:35:301
388839099542,8cyclictest3912165-21latency_hist09:25:011
3888390995427,21cyclictest3930688-21grep11:10:271
388839099542,44cyclictest3895573-21apt-get07:50:051
388839099542,14cyclictest3919877-21apt-get10:10:171
3888387995447,4cyclictest167350irq/118-8000000.ethernet-tx011:50:290
388839199539,13cyclictest3904592-21/usr/sbin/munin08:40:192
388839099536,37cyclictest0-21swapper/107:35:021
388839099536,37cyclictest0-21swapper/107:35:011
388839099533,42cyclictest3941699-21grep12:15:271
388839099532,11cyclictest3932764-21fschecks_count11:25:201
388839099531,11cyclictest3942036-21apt-get12:20:161
388839099524,38cyclictest3905768-21phc2sys08:45:261
388839099523,40cyclictest3890315-21cron07:20:001
3888390995230,19cyclictest167450irq/126-8000000.ethernet-tx107:45:161
388839099522,9cyclictest3901214-21/usr/sbin/munin08:20:301
388839099522,6cyclictest3936953-21/usr/sbin/munin11:50:311
388839099522,42cyclictest3933746-21/usr/sbin/munin11:30:221
388839099522,40cyclictest3925954-21sh10:45:201
388839099521,7cyclictest3916769-21/usr/sbin/munin09:50:251
388839099521,7cyclictest3916769-21/usr/sbin/munin09:50:251
3888390995212,31cyclictest0-21swapper/111:45:201
3888390995212,31cyclictest0-21swapper/111:45:201
388839099514,39cyclictest0-21swapper/112:25:181
388839099513,40cyclictest3935779-21grep11:40:311
388839099512,7cyclictest3919182-21grep10:05:181
388839099512,4cyclictest3914261-21/usr/sbin/munin09:35:261
388839099511,44cyclictest0-21swapper/107:44:041
3888390995113,30cyclictest0-21swapper/107:20:221
388839099505,36cyclictest0-21swapper/107:15:011
388839099502,40cyclictest3928099-21tail10:55:321
388839099502,40cyclictest3902594-21grep08:25:301
388839099501,7cyclictest3909457-21/usr/sbin/munin09:05:301
388838799503,14cyclictest15-21rcuc/008:25:020
388838799501,26cyclictest0-21swapper/009:10:010
3888391994938,7cyclictest3907847-21sendmail09:00:002
388839099494,36cyclictest0-21swapper/108:55:221
388839099493,38cyclictest3932342-21tail11:20:301
388839099493,38cyclictest3900813-21grep08:15:291
388839099493,38cyclictest3900813-21grep08:15:291
388839099493,37cyclictest3903069-21sh08:30:211
388839099493,37cyclictest3903069-21sh08:30:211
388839099493,36cyclictest3917915-21grep09:55:301
388839099493,35cyclictest0-21swapper/110:15:221
388839099493,35cyclictest0-21swapper/110:15:221
388839099492,37cyclictest3944296-21unixbench_singl12:30:301
388839099492,37cyclictest3929070-21latency_hist11:05:011
388839099491,9cyclictest3939221-21grep12:00:301
388839099491,9cyclictest3904086-21/usr/sbin/munin08:35:261
3888390994914,29cyclictest3911201-21sshd09:18:001
388839099491,38cyclictest3906956-21grep08:50:291
388839099491,38cyclictest1261-21rs:main1
3888387994942,4cyclictest167350irq/118-8000000.ethernet-tx009:10:250
3888391994836,8cyclictest0-21swapper/209:10:312
388839099483,37cyclictest3923784-21grep10:30:271
388839099482,37cyclictest3891937-21grep07:25:301
388839099482,36cyclictest3929797-21grep11:05:301
388839099482,11cyclictest3934330-21apt-get11:35:171
3888387994841,4cyclictest167350irq/118-8000000.ethernet-tx008:50:170
388838799482,39cyclictest0-21swapper/011:20:020
3888387994811,8cyclictest3935822-21apt-get11:45:010
3888391994736,7cyclictest3944566-21grep12:35:012
388839099472,3cyclictest3939494-21apt-get12:05:141
388839099472,36cyclictest3916253-21grep09:45:291
3888387994736,8cyclictest3926433-21munin-plugin-st10:50:000
3888387994734,10cyclictest0-21swapper/007:15:010
388838799471,2cyclictest0-21swapper/010:20:010
388838799471,2cyclictest0-21swapper/010:20:010
388839099461,37cyclictest3905128-21grep08:40:281
388839099461,34cyclictest3937894-21lsblk11:55:211
3888387994636,6cyclictest3902694-21grep08:30:000
388839199458,7cyclictest3909426-21unixbench_multi09:05:302
388839199454,20cyclictest0-21swapper/209:55:012
388839199454,20cyclictest0-21swapper/209:55:012
3888391994531,9cyclictest0-21swapper/211:30:302
388839099451,36cyclictest3940868-21unixbench_multi12:10:281
388839099451,36cyclictest3940868-21unixbench_multi12:10:281
388838799455,3cyclictest0-21swapper/012:05:020
388838799455,16cyclictest3927270-21apt-get10:55:010
3888387994536,5cyclictest20850irq/208-8000000.ethernet08:50:010
3888387994532,10cyclictest3911223-21latency_hist09:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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