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2026-05-16 - 16:59

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 Sat May 16, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
404351721150,3sleep10-21swapper/110:55:151
396495221050,2sleep00-21swapper/007:15:040
404649921010,3sleep10-21swapper/111:05:021
139099860,75rtkit-daemon0-21swapper/007:09:470
396228327839,14sleep20-21swapper/207:07:552
396217827138,27sleep10-21swapper/107:06:351
40369832660,3sleep20-21swapper/210:35:222
396232026442,15sleep30-21swapper/307:08:263
40329022530,4sleep10-21swapper/110:25:161
40278722510,2sleep10-21swapper/110:10:191
40744012470,4sleep04074390-21perf12:24:590
40744012470,4sleep04074390-21perf12:24:590
40184592430,2sleep10-21swapper/109:45:131
40112222360,3sleep00-21swapper/009:25:110
3962590992620,5cyclictest4026755-21basename10:10:002
396258599260,24cyclictest1389-21rtkit-daemon09:31:590
139099260,4rtkit-daemon1389-21rtkit-daemon08:37:431
139099250,4rtkit-daemon1389-21rtkit-daemon09:13:581
139099250,4rtkit-daemon1389-21rtkit-daemon07:50:081
139099250,3rtkit-daemon1389-21rtkit-daemon08:05:520
40699442240,4sleep03056-21PK-Backend12:10:160
3962590992413,9cyclictest3967233-21kernelversion07:20:172
396259099241,21cyclictest3997161-21/usr/sbin/munin08:45:152
40683782230,6sleep013-21ksoftirqd/012:05:190
39635072230,3chrt3056-21PK-Backend07:10:190
3962590992321,1cyclictest0-21swapper/211:13:312
3962590992321,1cyclictest0-21swapper/209:34:142
3962590992315,5cyclictest28650irq/123-ahci[0012:35:202
396259099231,20cyclictest0-21swapper/210:47:022
396258799230,21cyclictest4064414-21irqstats11:55:161
139099230,4rtkit-daemon1389-21rtkit-daemon09:07:141
139099230,4rtkit-daemon1389-21rtkit-daemon08:54:321
396259399220,20cyclictest3056-21PK-Backend09:23:533
396259399220,20cyclictest3056-21PK-Backend07:58:363
396259399220,20cyclictest1389-21rtkit-daemon11:41:153
3962590992220,1cyclictest0-21swapper/209:57:332
3962590992220,1cyclictest0-21swapper/209:53:292
3962590992220,1cyclictest0-21swapper/208:21:422
3962590992220,1cyclictest0-21swapper/207:31:392
3962590992214,6cyclictest28650irq/123-ahci[0010:55:222
3962590992213,6cyclictest28650irq/123-ahci[0011:25:202
396259099220,21cyclictest0-21swapper/211:08:102
396259099220,21cyclictest0-21swapper/210:10:052
3962587992220,1cyclictest0-21swapper/112:30:031
3962587992220,1cyclictest0-21swapper/111:52:121
3962587992220,1cyclictest0-21swapper/110:30:331
3962587992220,1cyclictest0-21swapper/109:40:371
3962587992219,2cyclictest3056-21PK-Backend12:16:581
3962587992219,2cyclictest3056-21PK-Backend08:49:131
396258799220,9cyclictest39672412tr07:20:171
396258799220,21cyclictest0-21swapper/107:42:481
396258799220,20cyclictest3056-21PK-Backend10:39:581
3962585992220,1cyclictest0-21swapper/009:53:090
3962585992214,6cyclictest4004576-21seq09:05:230
396258599221,16cyclictest4074653-21seq12:25:120
396258599220,20cyclictest3986496-21diskstats08:15:150
139099220,3rtkit-daemon1389-21rtkit-daemon09:19:221
139099220,3rtkit-daemon1389-21rtkit-daemon07:30:590
3962593992119,1cyclictest3056-21PK-Backend10:21:183
396259399210,20cyclictest0-21swapper/309:29:003
396259399210,20cyclictest0-21swapper/307:12:063
396259399210,19cyclictest3056-21PK-Backend08:56:153
3962590992119,1cyclictest0-21swapper/212:05:092
3962590992119,1cyclictest0-21swapper/210:33:162
3962590992119,1cyclictest0-21swapper/209:45:312
3962590992119,1cyclictest0-21swapper/209:39:212
3962590992119,1cyclictest0-21swapper/208:04:582
3962590992119,1cyclictest0-21swapper/207:53:102
3962590992119,1cyclictest0-21swapper/207:17:072
3962590992113,6cyclictest3994016-21awk08:35:182
3962590992112,7cyclictest3985255-21python308:10:212
396259099210,20cyclictest0-21swapper/210:40:402
396259099210,20cyclictest0-21swapper/210:04:432
396259099210,20cyclictest0-21swapper/208:44:122
396259099210,20cyclictest0-21swapper/207:57:022
3962587992119,1cyclictest0-21swapper/112:23:561
3962587992119,1cyclictest0-21swapper/112:23:561
3962587992119,1cyclictest0-21swapper/110:53:451
3962587992119,1cyclictest0-21swapper/109:50:041
3962587992119,1cyclictest0-21swapper/109:23:001
3962587992119,1cyclictest0-21swapper/108:55:091
3962587992119,1cyclictest0-21swapper/107:57:021
3962587992113,6cyclictest4055600-21expr11:30:131
3962587992113,6cyclictest4015754-21python309:35:211
396258799210,20cyclictest0-21swapper/108:07:301
396258799210,20cyclictest0-21swapper/107:32:491
396258599219,8cyclictest436-20systemd-journal10:45:010
3962585992113,6cyclictest4005756-21awk09:10:130
396258599210,19cyclictest4028468-21cron10:15:000
139099210,14rtkit-daemon3056-21PK-Backend12:07:561
139099210,14rtkit-daemon0-21swapper/112:00:241
3962593992018,1cyclictest0-21swapper/311:10:273
3962593992018,1cyclictest0-21swapper/310:50:183
3962593992018,1cyclictest0-21swapper/308:41:023
3962593992016,3cyclictest42-21ksoftirqd/308:10:013
396259399200,1cyclictest3056-21PK-Backend08:51:213
396259399200,1cyclictest0-21swapper/310:47:013
396259399200,19cyclictest0-21swapper/310:42:423
396259399200,19cyclictest0-21swapper/307:39:103
396259399200,18cyclictest3056-21PK-Backend09:09:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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