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2026-09-01 - 12:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
Click here to display the system's profile data or here to proceed to next system.
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, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Tue Sep 01, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
77193823420,2sleep3575-21kworker/3:2+events20:02:373
10149282580,3chrt0-21swapper/200:07:362
718109994941,5cyclictest1043615-21latency_hist00:40:011
9023192480,2sleep3471rcuc/322:12:393
718112994843,3cyclictest708414-21kworker/u8:0+events_unbound19:15:012
718109994438,4cyclictest824472-21kworker/u8:3+events_unbound21:05:011
718109994437,5cyclictest998629-21/usr/sbin/munin23:52:391
718109994335,6cyclictest275-21systemd-journal21:07:401
718107994333,8cyclictest931609-21kworker/u8:1+events_unbound22:57:440
718112994238,3cyclictest760046-21kworker/u8:3+events_unbound19:50:002
718112994137,3cyclictest817635-21kworker/u8:2+events_unbound20:47:492
718112994036,3cyclictest931609-21kworker/u8:1+flush-8:023:42:422
718107993918,9cyclictest943106-21ntpq22:52:430
718109993831,5cyclictest3304708-21kworker/u8:2+flush-8:019:22:421
718109993831,5cyclictest275-21systemd-journal22:51:401
71810799389,13cyclictest765497-21apt-get19:57:280
71810799388,18cyclictest884890-21diskstats21:57:320
718107993833,4cyclictest844686-21kworker/u8:0+events_unbound22:37:490
718107993829,7cyclictest883426-21ntpq21:52:400
718107993816,20cyclictest1-21systemd00:07:390
718107993810,15cyclictest933411-21tail22:42:490
718112993732,4cyclictest894356-21kworker/u8:2+events_unbound22:42:362
718112993732,4cyclictest799339-21kworker/u8:1+events_unbound20:42:442
718112993732,4cyclictest3304708-21kworker/u8:2+events_unbound20:22:392
71810799375,22cyclictest969140-21grep23:22:310
71810799375,22cyclictest969140-21grep23:22:300
718107993726,9cyclictest275-21systemd-journal23:40:010
718107993710,15cyclictest868893-21python321:37:470
7134062373,9sleep10-21swapper/119:06:261
718112993632,3cyclictest844686-21kworker/u8:0+events_unbound21:17:432
718112993632,3cyclictest3304708-21kworker/u8:2+events_unbound20:27:492
71810799365,12cyclictest775631-21df_inode20:07:330
718112993531,3cyclictest931609-21kworker/u8:1+flush-8:022:54:402
718112993531,3cyclictest894356-21kworker/u8:2+flush-8:023:07:452
718112993527,6cyclictest978464-21cat23:30:002
718109993529,4cyclictest967660-21strings23:17:391
718109993529,4cyclictest967660-21strings23:17:391
71810799359,15cyclictest977774-21ntpq23:27:420
71810799359,15cyclictest838786-21ntpq21:07:440
71810799358,16cyclictest815418-21diskstats20:47:330
71810799358,15cyclictest808742-21ntpq20:37:400
71810799358,15cyclictest730587-21diskstats19:22:320
71810799356,14cyclictest848641-21ntpq21:17:400
718107993514,9cyclictest828690-21memory20:57:390
718107993510,13cyclictest788981-21ntpq20:17:410
718107993510,12cyclictest919276-21apt-get22:32:280
718107993510,12cyclictest899948-21/usr/sbin/munin22:12:360
718107993510,12cyclictest893900-21/usr/sbin/munin22:02:500
718112993430,3cyclictest744221-21kworker/u8:1+events_unbound19:32:472
718112993430,3cyclictest744221-21kworker/u8:1+events_unbound19:32:472
718112993429,4cyclictest967844-21kworker/u8:3+flush-8:023:18:392
718112993429,4cyclictest967844-21kworker/u8:3+flush-8:023:18:392
718109993430,3cyclictest1038676-21awk00:35:011
71810799349,14cyclictest952941-21ntpq23:02:410
71810799349,14cyclictest908260-21ntpq22:17:440
71810799349,13cyclictest914339-21/usr/sbin/munin22:27:280
71810799349,12cyclictest1037899-21ntpq00:32:410
71810799349,11cyclictest833870-21ntpq21:02:470
71810799348,15cyclictest774268-21ntpq20:02:440
71810799348,15cyclictest1022847-21ntpq00:17:370
71810799348,15cyclictest1007312-21ntpq23:57:400
71810799348,13cyclictest989012-21diskstats23:42:320
71810799347,16cyclictest839943-21aten2_r5power_c21:12:300
71810799347,16cyclictest1029617-21hddtemp_smartct00:27:320
71810799347,15cyclictest894904-21hddtemp_smartct22:07:310
71810799346,16cyclictest1002220-21memory23:52:390
71810799343,20cyclictest979273-21hddtemp_smartct23:32:330
718107993425,6cyclictest275-21systemd-journal21:22:390
718107993415,9cyclictest761124-21/usr/sbin/munin19:52:350
718107993413,11cyclictest727517-21/usr/sbin/munin19:17:390
718107993410,11cyclictest793962-21ntpq20:22:420
718107993410,10cyclictest968033-21python323:17:460
718107993410,10cyclictest968033-21python323:17:460
718109993328,3cyclictest974492-21irqcore23:27:341
718109993328,3cyclictest742605-21kthreadcore19:32:391
718109993328,3cyclictest742605-21kthreadcore19:32:391
718109993326,5cyclictest755142-21latency_hist19:45:001
718109993326,5cyclictest755142-21latency_hist19:44:591
718109993325,6cyclictest799339-21kworker/u8:1+flush-8:020:32:431
718109993325,5cyclictest844432-21latency_hist21:15:011
71810799339,13cyclictest858783-21/usr/sbin/munin21:27:460
71810799339,13cyclictest1039504-21/usr/sbin/munin00:37:340
71810799339,12cyclictest993978-21/usr/sbin/munin23:47:320
71810799339,12cyclictest803891-21ntpq20:32:420
71810799338,15cyclictest860833-21irqstats21:32:370
71810799338,12cyclictest1012325-21ntpq00:02:420
71810799337,15cyclictest954565-21/usr/sbin/munin23:07:330
71810799337,15cyclictest934586-21diskstats22:47:310
71810799337,15cyclictest909634-21diskstats22:22:330
71810799336,16cyclictest870080-21df_inode21:42:300
71810799335,7cyclictest1018311-21taskset00:10:430
71810799335,15cyclictest722423-21sendmail_mailst19:12:470
71810799335,13cyclictest798844-21/usr/sbin/munin20:27:410
71810799334,17cyclictest744466-21python319:32:480
71810799334,17cyclictest744466-21python319:32:480
718107993311,12cyclictest1024830-21/usr/sbin/munin00:22:340
718107993310,10cyclictest814075-21ntpq20:42:440
718109993225,5cyclictest978895-21apt-get23:32:271
718109993225,5cyclictest967844-21kworker/u8:3+flush-8:023:42:441
718109993225,5cyclictest739776-21latency_hist19:30:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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