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2026-09-02 - 00:14

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 100 highest latencies:
System rackcslot7s.osadl.org (updated Tue Sep 01, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
212212721240,3sleep03056-21PK-Backend07:55:160
214841921180,3sleep342-21ksoftirqd/309:10:183
221931721140,4sleep30-21swapper/312:31:323
210442127538,14sleep10-21swapper/107:06:251
210464227252,14sleep30-21swapper/307:09:163
210467326341,16sleep20-21swapper/207:09:402
210444626244,13sleep00-21swapper/007:06:440
21707322450,5sleep13056-21PK-Backend10:15:041
21205692440,4sleep20-21swapper/207:50:212
22112242430,3sleep30-21swapper/312:10:183
22069352410,5chrt0-21swapper/012:00:010
21712662410,2sleep20-21swapper/210:15:172
210484899399,28cyclictest2152836-21apt-key09:25:013
210484899285,14cyclictest0-21swapper/309:57:123
21667902260,4sleep02166784-21awk10:05:000
210484899269,15cyclictest2139573-21sed08:45:153
210484499261,5cyclictest2115984-21munin-plugin-st07:40:002
210484499261,5cyclictest2115984-21munin-plugin-st07:40:002
210483999264,6cyclictest2130121-21apt08:20:000
210484899258,15cyclictest2156364-21cron09:35:003
210484899258,15cyclictest2115254-21wc07:35:223
210484899258,15cyclictest2115254-21wc07:35:213
210484899258,15cyclictest2109722-21cat07:20:173
210484199256,17cyclictest2155826-21grep09:30:211
22146472240,3sleep13056-21PK-Backend12:20:111
21512822240,10sleep013-21ksoftirqd/009:20:130
210484899248,14cyclictest2127302-21hddtemp_smartct08:10:153
210484899245,18cyclictest2163333-21basename09:55:003
2104848992410,12cyclictest0-21swapper/312:00:183
2104844992419,3cyclictest2174973-21ntp_states10:25:202
210484899239,12cyclictest2195010-21/usr/sbin/munin11:25:153
210484899238,13cyclictest2214729-21diskstats12:20:123
210484899238,13cyclictest2169511-21ntp_states10:10:193
210484899238,13cyclictest2138064-21ntp_states08:40:203
210484899232,12cyclictest0-21swapper/310:20:183
2104848992319,3cyclictest0-21swapper/308:07:253
2104848992316,3cyclictest2167043-21apt10:05:123
210484899231,19cyclictest2219895-21apt12:35:123
2104844992317,4cyclictest2122942-21systemd08:00:002
2104844992314,6cyclictest2165056-21ls10:00:002
2104841992312,10cyclictest3056-21PK-Backend11:13:461
210484199230,22cyclictest3056-21PK-Backend12:10:491
139099230,4rtkit-daemon1389-21rtkit-daemon11:05:480
139099230,4rtkit-daemon1389-21rtkit-daemon09:19:300
139099230,4rtkit-daemon1389-21rtkit-daemon07:34:560
139099230,4rtkit-daemon1389-21rtkit-daemon07:14:440
210484899228,13cyclictest2200508-21cstates11:40:143
210484899228,12cyclictest2205026-21sshd11:53:273
210484899228,12cyclictest2119771-21ls07:50:123
210484899227,13cyclictest2185742-21runrttasks10:55:373
2104848992214,5cyclictest2205406-21/usr/sbin/munin11:55:253
2104844992220,1cyclictest0-21swapper/209:40:522
2104844992220,1cyclictest0-21swapper/209:36:072
2104844992220,1cyclictest0-21swapper/208:32:182
2104844992220,1cyclictest0-21swapper/207:33:372
2104844992220,1cyclictest0-21swapper/207:16:272
210484499220,20cyclictest2129932-21taskset08:17:522
210484499220,20cyclictest0-21swapper/208:51:582
210484499220,20cyclictest0-21swapper/208:10:092
210484199227,14cyclictest3056-21PK-Backend08:02:351
210484199226,14cyclictest0-21swapper/109:50:261
210484199225,15cyclictest2200075-21sed11:40:011
210484199225,15cyclictest2125611-21awk08:05:171
2104841992220,1cyclictest3056-21PK-Backend11:17:561
2104841992212,9cyclictest3056-21PK-Backend10:11:351
2104841992212,9cyclictest3056-21PK-Backend08:15:021
210484199221,19cyclictest2146824-21cut09:05:221
210484199220,21cyclictest3056-21PK-Backend11:50:211
210484199220,1cyclictest3056-21PK-Backend08:13:431
21322252210,4sleep13056-21PK-Backend08:25:121
210484899217,12cyclictest2192487-21switchtime11:15:223
210484899217,12cyclictest2160978-21smartctl09:45:223
210484899215,14cyclictest2186368-21apt11:00:123
2104848992113,6cyclictest2193430-21expr11:20:123
2104848992112,6cyclictest436-20systemd-journal12:15:043
2104848992111,9cyclictest2178569-21python310:35:233
2104848992111,8cyclictest2145723-21awk09:05:003
2104848992110,9cyclictest2177441-21munin-plugin-st10:35:003
2104844992119,1cyclictest0-21swapper/212:15:182
2104844992119,1cyclictest0-21swapper/212:06:122
2104844992119,1cyclictest0-21swapper/212:00:452
2104844992119,1cyclictest0-21swapper/211:44:082
2104844992119,1cyclictest0-21swapper/211:31:522
2104844992119,1cyclictest0-21swapper/211:03:392
2104844992119,1cyclictest0-21swapper/210:06:342
2104844992119,1cyclictest0-21swapper/209:32:072
2104844992119,1cyclictest0-21swapper/209:02:332
2104844992119,1cyclictest0-21swapper/208:46:242
210484499210,20cyclictest0-21swapper/212:23:222
210484499210,20cyclictest0-21swapper/211:37:532
210484499210,20cyclictest0-21swapper/211:22:122
210484499210,20cyclictest0-21swapper/211:12:322
210484199219,10cyclictest3056-21PK-Backend08:54:041
210484199217,12cyclictest3056-21PK-Backend09:04:461
210484199216,14cyclictest3056-21PK-Backend08:40:481
2104841992119,1cyclictest3056-21PK-Backend12:38:401
2104841992119,1cyclictest3056-21PK-Backend12:31:511
2104841992119,1cyclictest3056-21PK-Backend11:47:441
2104841992119,1cyclictest3056-21PK-Backend11:01:201
2104841992119,1cyclictest3056-21PK-Backend10:24:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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