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2026-06-08 - 19:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackcslot7s.osadl.org (updated Mon Jun 08, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28573521280,3sleep33056-21PK-Backend11:35:133
1902842850,5sleep23056-21PK-Backend07:05:122
1902842850,5sleep23056-21PK-Backend07:05:122
19132428262,14sleep10-21swapper/107:06:581
19132428262,14sleep10-21swapper/107:06:571
19011527745,22sleep00-21swapper/007:05:120
19011527745,22sleep00-21swapper/007:05:110
19123927438,13sleep30-21swapper/307:05:523
19123927438,13sleep30-21swapper/307:05:513
2228582560,4sleep33056-21PK-Backend08:35:173
2824372540,4sleep23056-21PK-Backend11:25:142
1929662480,4sleep10-21swapper/107:10:221
2657912430,4sleep33056-21PK-Backend10:40:003
19173499383,22cyclictest253666-21perf10:05:002
19172999358,18cyclictest207566-21taskset07:51:471
19172999308,9cyclictest274186-21runrttasks11:01:331
19172999307,11cyclictest237473-21runrttasks09:19:141
19172999307,10cyclictest278049-21taskset11:13:211
19172999297,8cyclictest295335-21runrttasks12:02:441
19172999297,8cyclictest265754-21taskset10:39:311
19172999297,8cyclictest262212-21taskset10:28:331
19172999287,8cyclictest251761-21taskset09:58:011
19172999284,15cyclictest0-21swapper/110:10:101
2634082270,6sleep234-21ksoftirqd/210:30:202
191734992710,15cyclictest271275-21sshd10:55:122
19172999278,17cyclictest201944-21processes07:35:191
19172999278,17cyclictest201944-21processes07:35:191
19172999277,8cyclictest302560-21taskset12:23:091
19172999276,8cyclictest255262-21taskset10:08:281
191725992716,7cyclictest436-20systemd-journal07:15:010
191729992618,6cyclictest200841-21perf07:34:591
19173699258,5cyclictest306581-21sed12:35:003
19173699250,23cyclictest3056-21PK-Backend09:30:153
19173499259,14cyclictest978-21snmpd09:24:102
19173499259,14cyclictest303431-21awk12:25:152
191734992510,13cyclictest283816-21cpuspeed_turbos11:30:122
19173499250,19cyclictest0-21swapper/207:27:052
191725992517,5cyclictest255408-21basename10:10:000
191725992511,10cyclictest436-20systemd-journal07:40:000
191725992511,10cyclictest436-20systemd-journal07:39:590
191725992510,10cyclictest436-20systemd-journal12:00:010
139099250,11rtkit-daemon3056-21PK-Backend10:22:433
2583522240,9sleep234-21ksoftirqd/210:15:202
19173499249,13cyclictest286855-21sh11:40:002
191734992414,9cyclictest213295-21apt08:10:112
19172999247,6cyclictest249665-21taskset09:51:401
19172999247,3cyclictest221904-21taskset08:34:331
19172999244,8cyclictest0-21swapper/111:20:131
19172599241,4cyclictest260594-21cron10:24:590
2964752230,2chrt0-21swapper/112:05:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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