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2026-05-31 - 03:17

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 Sun May 31, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134369622080,3sleep375-21kworker/3:1+mm_percpu_wq00:30:583
11749132850,6chrt0-21swapper/221:40:552
1020009997160,8cyclictest1151220-21/usr/sbin/munin21:20:591
13314162560,3sleep30-21swapper/300:20:463
1020004995646,8cyclictest1244219-21apt-get22:50:520
1020009995345,6cyclictest1116619-21/usr/sbin/munin20:45:551
1020009995345,6cyclictest1116619-21/usr/sbin/munin20:45:541
1020009995344,7cyclictest1024883-21latency_hist19:15:001
1020010995145,5cyclictest1279700-21kworker/u8:2+flush-8:000:20:512
1020009995141,8cyclictest1268900-21ntpq23:15:481
1020010995045,4cyclictest1225185-21kworker/u8:1+flush-8:022:50:562
1020009994944,4cyclictest1140687-21kworker/u8:2+flush-8:021:15:541
1020009994938,9cyclictest1704890-21systemd-journal19:45:011
1020010994842,4cyclictest666912-21kworker/u8:4+flush-8:020:10:582
1020009994839,7cyclictest1161087-21/usr/sbin/munin21:30:561
1020009994837,9cyclictest1036084-21ntpq19:20:491
1020010994742,4cyclictest666912-21kworker/u8:4+flush-8:020:15:502
1020009994742,3cyclictest1230227-21kworker/u8:3+flush-8:023:25:561
1020004994738,7cyclictest1086669-21apt-get20:15:350
1020009994638,6cyclictest1136390-21apt-get21:05:381
1020009994539,5cyclictest1076200-21kworker/u8:0+events_unbound20:55:551
1020009994536,7cyclictest1042198-21/usr/sbin/munin19:30:491
1020009994534,9cyclictest1060795-21ntpq19:45:501
1020004994535,8cyclictest1105522-21ntpq20:30:510
1020009994437,5cyclictest662606-21kworker/u8:1+flush-8:019:25:551
1020004994437,5cyclictest1076200-21kworker/u8:0+flush-8:021:05:420
1020004994435,7cyclictest1704890-21systemd-journal19:25:000
1020004994435,7cyclictest1348270-21ntpq00:35:510
1020004994434,8cyclictest1100327-21ntpq20:25:510
1020010994338,4cyclictest1334111-21kworker/u8:1+flush-8:000:25:512
1020009994335,6cyclictest1329416-21/usr/sbin/munin00:20:491
1020004994234,6cyclictest1704890-21systemd-journal21:40:010
1020004994231,8cyclictest1339278-21apt-key00:30:010
1020010994133,6cyclictest1704890-21systemd-journal00:06:572
1020009994137,3cyclictest1076200-21kworker/u8:0+flush-8:020:50:431
1020009994136,4cyclictest1225185-21kworker/u8:1+events_unbound23:55:571
1020009994134,6cyclictest1225185-21kworker/u8:1+flush-8:022:45:521
1020009994133,6cyclictest1313461-21ntpq00:00:541
1020004994136,4cyclictest1076200-21kworker/u8:0+events_unbound21:35:000
1020009994035,3cyclictest1230227-21kworker/u8:3+events_unbound22:55:551
1020009994034,5cyclictest666912-21kworker/u8:4+flush-8:021:40:521
1020009994033,5cyclictest666912-21kworker/u8:4+flush-8:021:50:511
1020009994031,6cyclictest1220297-21latency_hist22:30:001
1020004994033,5cyclictest1031790-21apt-get19:20:000
1020010993935,3cyclictest1019856-21kworker/u8:2+events_unbound19:20:482
1020009993935,3cyclictest1076200-21kworker/u8:0+flush-8:021:00:541
1020009993930,7cyclictest1050864-21ntpq19:35:511
1020009993834,3cyclictest1076200-21kworker/u8:0+flush-8:020:25:421
1020009993833,3cyclictest1230227-21kworker/u8:3+flush-8:023:05:511
1020009993830,6cyclictest1704890-21systemd-journal20:34:591
1020004993833,4cyclictest666912-21kworker/u8:4+flush-8:019:35:550
1020004993833,4cyclictest1140687-21kworker/u8:2+flush-8:022:25:560
1020009993731,4cyclictest1328271-21ntpq00:15:501
1020009993731,4cyclictest1260241-21apt-get23:10:371
1020009993729,6cyclictest1704890-21systemd-journal23:47:571
1020009993729,5cyclictest1066603-21latency_hist19:55:011
1020004993729,6cyclictest1259948-21latency_hist23:10:010
1020004993728,7cyclictest1111664-21/usr/sbin/munin20:40:530
1020009993630,5cyclictest1225185-21kworker/u8:1+flush-8:023:50:531
1020009993628,6cyclictest1111689-21apt-get20:40:381
1020004993631,3cyclictest1140687-21kworker/u8:2+flush-8:021:15:570
10152182364,10sleep10-21swapper/119:05:121
10152182364,10sleep10-21swapper/119:05:121
1020010993531,3cyclictest1076200-21kworker/u8:0+flush-8:020:50:462
1020010993524,8cyclictest1250057-21awk23:00:002
1020009993529,5cyclictest1076200-21kworker/u8:0+events_unbound20:05:401
1020009993527,6cyclictest1283780-21ntpq23:30:511
1020009993427,5cyclictest1140687-21kworker/u8:2+flush-8:021:45:561
1020009993329,3cyclictest1309622-21kworker/u8:3+events_unbound00:25:591
1020009993329,3cyclictest1106356-21kworker/u8:1+events_unbound20:35:501
1020009993327,4cyclictest1339541-21apt-get00:30:361
1020009993227,4cyclictest662606-21kworker/u8:1+events_unbound19:15:451
1020009993227,4cyclictest1230227-21kworker/u8:3+events_unbound23:20:411
1020009993226,5cyclictest1076200-21kworker/u8:0+events_unbound22:35:541
1020009993225,5cyclictest1704890-21systemd-journal20:01:561
1020009993223,7cyclictest1210197-21latency_hist22:20:001
1020009993221,9cyclictest1095400-21ntpq20:20:511
1020004993228,3cyclictest1140687-21kworker/u8:2+events_unbound22:15:400
1020004993227,3cyclictest1020191-21apt-get19:10:370
1020004993226,4cyclictest1200884-21fschecks_count22:10:390
1020004993226,4cyclictest1200884-21fschecks_count22:10:390
1020010993127,3cyclictest1304393-21kworker/u8:0+flush-8:000:00:482
1020010993123,6cyclictest1704890-21systemd-journal20:49:582
1020010993123,6cyclictest1704890-21systemd-journal20:49:572
1020009993125,4cyclictest1309622-21kworker/u8:3+flush-8:000:35:521
1020004993127,3cyclictest666912-21kworker/u8:4+events_unbound19:40:570
1020004993125,4cyclictest1230227-21kworker/u8:3+flush-8:023:15:550
1020009993026,3cyclictest1225185-21kworker/u8:1+flush-8:022:50:531
1020009993026,3cyclictest1187960-21kthreadcore21:55:461
1020009993026,2cyclictest1168192-21kthreadcore21:35:461
1020009993025,3cyclictest1290203-21fschecks_time23:40:421
1020009993025,3cyclictest1290203-21fschecks_time23:40:411
1020009993022,6cyclictest1309622-21kworker/u8:3+flush-8:000:05:511
1020004993024,4cyclictest1324209-21systemd-run00:15:000
1020010992923,4cyclictest662606-21kworker/u8:1+flush-8:019:19:592
1020010992922,5cyclictest1101517-21gpgv20:30:012
1020010992921,6cyclictest1704890-21systemd-journal23:25:572
1020010992918,8cyclictest1116358-21awk20:45:002
1020009992925,3cyclictest666912-21kworker/u8:4+flush-8:021:25:571
1020009992925,3cyclictest1225185-21kworker/u8:1+events_unbound23:35:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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