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2026-09-17 - 06:00

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 Wed Sep 16, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
216662623460,12sleep3411rcuc/307:05:153
224445821460,9sleep013-21ksoftirqd/010:45:120
218970621350,4sleep30-21swapper/308:10:003
218970621350,4sleep30-21swapper/308:10:003
225096321320,3sleep03056-21PK-Backend11:00:230
225096321320,3sleep03056-21PK-Backend11:00:220
218687321230,3sleep00-21swapper/008:00:190
216743927940,33sleep20-21swapper/207:06:112
216758427739,14sleep00-21swapper/007:08:020
216707226645,14sleep10-21swapper/107:05:301
22499162470,7sleep1261ksoftirqd/111:00:121
22499162470,7sleep1261ksoftirqd/111:00:121
22395232440,3sleep20-21swapper/210:30:182
139099390,3rtkit-daemon1389-21rtkit-daemon11:56:162
139099390,3rtkit-daemon1389-21rtkit-daemon11:56:162
139099280,4rtkit-daemon1389-21rtkit-daemon11:53:383
139099280,4rtkit-daemon1389-21rtkit-daemon07:45:413
139099280,4rtkit-daemon1389-21rtkit-daemon07:35:103
139099270,4rtkit-daemon1389-21rtkit-daemon07:14:593
139099270,3rtkit-daemon1389-21rtkit-daemon10:28:013
22785462260,2chrt0-21swapper/312:20:183
139099260,4rtkit-daemon1389-21rtkit-daemon12:37:223
139099260,4rtkit-daemon1389-21rtkit-daemon09:36:252
139099260,3rtkit-daemon1389-21rtkit-daemon11:13:243
22822592250,9sleep342-21ksoftirqd/312:30:203
216796599250,23cyclictest1389-21rtkit-daemon07:32:553
216796599240,22cyclictest1389-21rtkit-daemon07:28:173
2167961992412,10cyclictest2281766-21df_inode12:30:142
139099240,4rtkit-daemon1389-21rtkit-daemon09:27:593
139099240,4rtkit-daemon1389-21rtkit-daemon07:43:523
139099240,3rtkit-daemon1389-21rtkit-daemon11:01:413
139099240,3rtkit-daemon1389-21rtkit-daemon11:01:413
2167961992321,1cyclictest0-21swapper/208:36:172
2167956992315,6cyclictest2168709-21df_inode07:10:141
216796599220,19cyclictest1389-21rtkit-daemon11:56:163
216796599220,19cyclictest1389-21rtkit-daemon11:56:153
2167961992220,1cyclictest0-21swapper/212:03:012
2167961992220,1cyclictest0-21swapper/211:37:052
2167961992220,1cyclictest0-21swapper/211:27:182
2167961992220,1cyclictest0-21swapper/209:55:452
2167961992220,1cyclictest0-21swapper/208:20:282
2167956992220,1cyclictest3056-21PK-Backend07:35:231
2167956992220,1cyclictest0-21swapper/108:15:111
2167956992219,2cyclictest3056-21PK-Backend11:39:591
216795699220,19cyclictest0-21swapper/108:50:131
216795199224,16cyclictest1-21systemd08:35:000
2167951992220,1cyclictest0-21swapper/008:36:140
2167951992216,5cyclictest2243977-21systemd-run10:45:000
2167951992215,5cyclictest2275315-21python312:10:190
216795199220,20cyclictest2204082-21apt08:50:130
216796599210,20cyclictest3056-21PK-Backend07:58:573
216796599210,20cyclictest0-21swapper/309:30:093
216796599210,19cyclictest3056-21PK-Backend09:20:013
216796599210,18cyclictest2192405-21/usr/sbin/munin08:15:193
2167961992119,1cyclictest0-21swapper/211:14:212
2167961992119,1cyclictest0-21swapper/211:09:342
2167961992119,1cyclictest0-21swapper/209:24:562
2167961992119,1cyclictest0-21swapper/209:07:192
2167961992119,1cyclictest0-21swapper/209:07:192
2167961992119,1cyclictest0-21swapper/208:30:562
2167961992119,1cyclictest0-21swapper/208:11:572
2167961992119,1cyclictest0-21swapper/207:58:452
2167961992119,1cyclictest0-21swapper/207:16:542
2167961992114,6cyclictest2251193-21sshd11:02:382
2167961992114,6cyclictest2251193-21sshd11:02:382
216796199210,20cyclictest0-21swapper/211:41:032
216796199210,20cyclictest0-21swapper/207:50:132
216796199210,20cyclictest0-21swapper/207:13:502
216796199210,19cyclictest3056-21PK-Backend12:10:242
2167956992119,1cyclictest3056-21PK-Backend10:35:441
2167956992119,1cyclictest3056-21PK-Backend07:28:131
2167956992119,1cyclictest0-21swapper/108:00:581
2167956992119,1cyclictest0-21swapper/107:19:481
2167956992118,2cyclictest3056-21PK-Backend08:56:551
2167956992118,2cyclictest3056-21PK-Backend08:21:201
216795699210,20cyclictest0-21swapper/110:30:241
216795699210,20cyclictest0-21swapper/108:35:191
216795699210,19cyclictest3056-21PK-Backend08:07:071
216795699210,19cyclictest3056-21PK-Backend08:07:071
216795699210,19cyclictest3056-21PK-Backend07:42:331
216795699210,19cyclictest3056-21PK-Backend07:33:201
2167951992113,6cyclictest2252660-21sed11:05:220
216795199210,20cyclictest0-21swapper/011:46:080
139099210,4rtkit-daemon1389-21rtkit-daemon10:35:432
139099210,3rtkit-daemon1389-21rtkit-daemon07:53:383
2167965992018,1cyclictest0-21swapper/307:23:413
2167965992017,2cyclictest3056-21PK-Backend08:34:253
2167965992016,3cyclictest1095-21runrttasks08:04:083
2167965992012,6cyclictest436-20systemd-journal10:19:593
2167965992012,6cyclictest2280414-21awk12:25:183
2167965992012,6cyclictest2219934-21find09:35:123
216796599200,1cyclictest3056-21PK-Backend12:06:103
216796599200,1cyclictest3056-21PK-Backend10:08:013
216796599200,19cyclictest3056-21PK-Backend11:48:253
216796599200,19cyclictest3056-21PK-Backend11:08:363
216796599200,19cyclictest3056-21PK-Backend10:44:163
216796599200,19cyclictest0-21swapper/311:44:273
216796599200,19cyclictest0-21swapper/308:59:203
216796599200,18cyclictest3056-21PK-Backend08:52:233
216796599200,18cyclictest3056-21PK-Backend08:41:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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