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2026-05-11 - 06:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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: performance
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rackbslot5s.osadl.org (updated Mon May 11, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1189366995648,5cyclictest1272145-21unixbench_multi23:05:260
1189369995329,20cyclictest0-21swapper/121:25:001
1189366995027,8cyclictest131rcu_preempt23:10:120
1189377994935,11cyclictest391ktimers/323:45:133
1189366994834,11cyclictest121ktimers/021:30:130
1189373994740,4cyclictest12003612sleep219:40:122
1189377994435,6cyclictest1300213-21sshd00:28:393
1189377994420,21cyclictest0-21swapper/300:00:003
1189377994418,22cyclictest0-21swapper/323:20:163
1189377994415,26cyclictest0-21swapper/300:15:013
1189377994415,26cyclictest0-21swapper/300:15:003
1189377994415,25cyclictest0-21swapper/323:10:233
1189369994438,4cyclictest1231460-21munin-plugin-st21:10:011
1189369994438,4cyclictest1231460-21munin-plugin-st21:10:001
1189369994435,6cyclictest1203541-21idleruntime-cro19:50:001
1189369994435,6cyclictest1203541-21idleruntime-cro19:50:001
1189369994432,9cyclictest231ktimers/119:15:111
1189366994438,4cyclictest1243254-21kworker/u8:3+events_unbound22:16:590
1189377994315,9cyclictest1223302-21cut20:45:193
118937799427,11cyclictest1253829-21apt22:15:013
118937799427,11cyclictest1253829-21apt22:15:003
1189377994213,3cyclictest0-21swapper/321:40:163
1189373994234,5cyclictest1265783-21audit_send_reply22:50:002
1189366994232,7cyclictest1289435-21grep23:55:250
118937799419,4cyclictest1232741-21unixbench_singl21:10:253
118937799419,4cyclictest1232741-21unixbench_singl21:10:243
118937799417,6cyclictest1303267-21grep00:35:243
1189377994132,6cyclictest1268714-21unixbench_multi22:55:263
118937799408,5cyclictest1261440-21/usr/sbin/munin22:35:223
118937799407,5cyclictest1263593-21unixbench_multi22:40:233
118937799406,6cyclictest1230984-21unixbench_multi21:05:273
118937799406,6cyclictest1230984-21unixbench_multi21:05:273
1189377994014,4cyclictest0-21swapper/320:00:263
1189377994014,23cyclictest0-21swapper/321:35:143
1189377994013,5cyclictest391ktimers/319:55:233
1189377994012,3cyclictest0-21swapper/323:25:183
1189377994012,3cyclictest0-21swapper/323:25:173
118937799401,12cyclictest1212275-21munin-run20:15:003
118937799401,11cyclictest1270437-21tail23:00:273
1189373994032,5cyclictest1260653-21cron22:35:012
118937799392,12cyclictest1288160-21awk23:55:003
1189377993913,3cyclictest0-21swapper/321:15:243
1189377993913,3cyclictest0-21swapper/319:36:353
1189377993912,2cyclictest0-21swapper/300:15:263
118937799391,10cyclictest1201370-21unixbench_multi19:40:253
1189369993932,4cyclictest0-21swapper/122:00:001
118937799381,9cyclictest1213960-21cron20:20:003
1189377993813,3cyclictest0-21swapper/323:06:113
1189377993812,3cyclictest0-21swapper/320:42:133
1189377993812,3cyclictest0-21swapper/320:42:133
1189377993811,3cyclictest0-21swapper/300:00:273
118937799381,12cyclictest1264493-21cut22:45:153
118937799381,10cyclictest1244641-21grep21:45:253
1189377993810,8cyclictest204-21dbus-daemon20:26:443
1189373993831,4cyclictest0-21swapper/221:15:002
1189373993831,4cyclictest0-21swapper/221:15:002
1189373993830,5cyclictest1205452-21idleruntime-cro19:55:012
1189373993828,6cyclictest0-21swapper/223:00:262
1189369993829,4cyclictest0-21swapper/120:11:411
1189369993827,7cyclictest0-21swapper/122:16:581
118936699382,8cyclictest11-21ksoftirqd/022:45:120
1189366993815,6cyclictest131rcu_preempt23:00:130
118937799378,6cyclictest1192930-21seq19:15:463
1189377993727,7cyclictest1238279-21auditctl21:30:003
118937799371,8cyclictest1293271-21cron00:10:003
118937799371,8cyclictest1293271-21cron00:10:003
1189377993713,21cyclictest0-21swapper/322:15:253
1189377993712,3cyclictest0-21swapper/319:20:243
1189377993711,3cyclictest1226350-21/usr/sbin/munin20:55:213
118937799371,10cyclictest1298622-21cron00:25:003
1189377993710,5cyclictest0-21swapper/321:50:173
1189373993729,4cyclictest0-21swapper/221:25:252
1189373993726,8cyclictest1289397-21grep23:55:262
1189377993611,5cyclictest0-21swapper/322:00:183
1189377993611,4cyclictest0-21swapper/322:20:193
118937799361,12cyclictest1280887-21grep23:30:273
118937799361,10cyclictest1259099-21wc22:30:013
1189377993610,3cyclictest0-21swapper/319:30:183
1189373993625,6cyclictest0-21swapper/221:55:002
1189366993626,7cyclictest1251722-21grep22:05:270
1189366993527,4cyclictest151rcuc/020:30:120
1189377993425,5cyclictest0-21swapper/300:35:013
1189377993424,6cyclictest0-21swapper/323:40:263
1189377993424,6cyclictest0-21swapper/323:40:263
1189377993412,3cyclictest645-21runrttasks21:32:533
1189377993411,4cyclictest391ktimers/321:55:143
1189373993418,12cyclictest311ktimers/221:05:152
1189373993418,12cyclictest311ktimers/221:05:152
1189369993426,4cyclictest0-21swapper/100:30:251
1189369993425,5cyclictest1286460-21munin-plugin-st23:50:001
1189366993425,4cyclictest0-21swapper/020:26:440
1189366993424,6cyclictest0-21swapper/019:40:160
1189366993419,12cyclictest1189358-21cyclictest22:35:120
1189377993325,4cyclictest0-21swapper/319:46:363
1189377993325,4cyclictest0-21swapper/319:46:363
1189377993311,3cyclictest0-21swapper/321:00:263
118937799331,10cyclictest1252127-21cron22:10:003
1189377993310,5cyclictest391ktimers/320:20:133
1189373993326,4cyclictest0-21swapper/221:40:162
1189373993325,4cyclictest0-21swapper/222:05:172
1189373993323,7cyclictest1250023-21grep22:00:262
1189369993326,4cyclictest0-21swapper/123:35:261
1189369993325,5cyclictest1274328-21latency_hist23:15:001
1189366993326,4cyclictest0-21swapper/020:40:000
1189366993326,4cyclictest0-21swapper/020:40:000
1189366993325,4cyclictest1208876-21munin-plugin-st20:05:010
118936699331,9cyclictest11-21ksoftirqd/021:50:130
1189377993224,4cyclictest0-21swapper/320:55:023
1189377993221,8cyclictest391ktimers/320:35:143
1189377993221,8cyclictest391ktimers/320:35:133
1189373993223,5cyclictest0-21swapper/220:05:012
1189373993221,7cyclictest1196295-21grep19:25:282
1189369993224,4cyclictest0-21swapper/121:45:251
1189369993222,6cyclictest0-21swapper/121:30:301
1189369993221,7cyclictest0-21swapper/120:25:281
118936699329,6cyclictest131rcu_preempt20:20:110
118936699324,4cyclictest131rcu_preempt21:45:110
1189366993226,3cyclictest1288153-21kthreadd23:55:000
1189366993225,5cyclictest1211911-21kworker/u8:1+events_unbound20:11:430
1189366993222,7cyclictest1283056-21idleruntime-cro23:40:000
118937799319,5cyclictest391ktimers/320:30:233
1189373993125,4cyclictest1272596-21cron23:10:002
1189373993124,5cyclictest1257179-21kworker/u8:0+events_unbound22:27:012
1189373993124,4cyclictest1222504-21sh20:45:002
1189373993124,4cyclictest1222504-21sh20:45:002
1189373993124,4cyclictest0-21swapper/220:55:252
1189373993121,7cyclictest1274292-21sh23:15:012
1189369993123,4cyclictest0-21swapper/100:35:151
1189366993123,6cyclictest1182371-21kworker/u8:1+events_unbound19:53:410
1189366993123,5cyclictest0-21swapper/019:20:020
1189366993123,4cyclictest0-21swapper/020:40:250
1189366993123,4cyclictest0-21swapper/020:40:250
1189366993120,7cyclictest0-21swapper/000:15:260
1189366993114,5cyclictest131rcu_preempt19:26:330
1189373993023,4cyclictest0-21swapper/223:20:252
1189369993022,4cyclictest0-21swapper/122:25:251
1189369993017,9cyclictest204-21dbus-daemon21:01:481
118936699309,5cyclictest131rcu_preempt21:05:140
118936699309,5cyclictest131rcu_preempt21:05:140
118936699308,5cyclictest131rcu_preempt19:40:000
1189366993023,5cyclictest1182371-21kworker/u8:1+events_unbound20:05:050
1189366993021,7cyclictest1220727-21kworker/u8:1+events_unbound21:25:410
1189366993020,7cyclictest1257254-21auditctl22:25:000
1189366993020,6cyclictest0-21swapper/022:57:080
1189377992913,13cyclictest1189358-21cyclictest23:35:133
118937399298,4cyclictest12122902cat20:15:012
1189373992919,7cyclictest1281339-21awk23:35:002
1189369992922,4cyclictest0-21swapper/120:45:271
1189369992921,4cyclictest0-21swapper/123:40:271
1189369992921,4cyclictest0-21swapper/123:40:261
1189369992919,7cyclictest1269190-21idleruntime-cro23:00:001
1189366992922,4cyclictest13550irq/42-30be0000.ethernet00:40:000
118936699291,7cyclictest0-21swapper/022:30:150
1189373992821,4cyclictest0-21swapper/219:35:262
1189369992821,3cyclictest0-21swapper/120:55:251
1189369992820,4cyclictest0-21swapper/122:22:011
1189369992819,6cyclictest0-21swapper/119:30:161
1189369992818,6cyclictest1267057-21grep22:50:271
1189369992817,7cyclictest1194575-21grep19:20:241
118936699288,3cyclictest131rcu_preempt20:20:000
1189366992822,4cyclictest1287926-21kworker/u8:0+events_unbound00:01:070
1189366992820,4cyclictest0-21swapper/023:50:010
1189366992811,3cyclictest131rcu_preempt21:40:210
1189366992811,3cyclictest0-21swapper/000:29:350
1189377992720,4cyclictest0-21swapper/319:25:223
1189377992718,5cyclictest0-21swapper/320:05:273
1189373992715,7cyclictest0-21swapper/200:05:252
1189373992715,7cyclictest0-21swapper/200:05:252
1189369992721,3cyclictest0-21swapper/119:40:181
1189369992719,4cyclictest0-21swapper/100:20:001
1189369992717,7cyclictest1208399-21grep20:00:261
1189369992716,7cyclictest1220365-21grep20:35:261
1189369992716,7cyclictest1220365-21grep20:35:261
118936699279,4cyclictest0-21swapper/022:43:060
118936699279,3cyclictest1226570-21grep20:55:150
118936699278,6cyclictest11-21ksoftirqd/023:15:260
118936699276,12cyclictest11-21ksoftirqd/000:25:010
1189366992720,5cyclictest1276584-21kworker/u8:3+events_unbound00:05:160
1189366992720,5cyclictest1276584-21kworker/u8:3+events_unbound00:05:160
1189366992719,5cyclictest0-21swapper/022:50:260
1189366992719,4cyclictest13850irq/36-mmc122:00:000
118936699271,4cyclictest1276643-21tune2fs23:20:160
1189366992712,5cyclictest131rcu_preempt20:45:250
1189366992710,11cyclictest11-21ksoftirqd/021:20:150
1189377992619,3cyclictest0-21swapper/323:15:263
1189373992619,4cyclictest0-21swapper/223:50:252
1189373992617,6cyclictest0-21swapper/223:15:262
1189369992619,5cyclictest1243254-21kworker/u8:3+events_unbound22:42:071
1189369992619,4cyclictest0-21swapper/120:50:221
1189369992619,4cyclictest0-21swapper/120:30:251
1189369992618,5cyclictest0-21swapper/100:00:231
118936699268,11cyclictest131rcu_preempt23:27:140
118936699268,11cyclictest131rcu_preempt23:27:140
118936699265,13cyclictest11-21ksoftirqd/019:55:260
1189366992620,3cyclictest0-21swapper/020:50:250
1189366992619,5cyclictest1227552-21kworker/u8:2+events_unbound21:35:250
118936699261,8cyclictest11-21ksoftirqd/019:10:120
1189366992617,3cyclictest131rcu_preempt19:45:250
1189366992617,3cyclictest131rcu_preempt19:45:250
1189366992611,11cyclictest204-21dbus-daemon00:13:190
1189366992611,11cyclictest204-21dbus-daemon00:13:190
1189373992519,3cyclictest0-21swapper/220:50:222
1189373992518,4cyclictest1281570-21taskset23:35:142
1189373992518,4cyclictest0-21swapper/223:25:222
1189373992518,4cyclictest0-21swapper/223:25:222
1189373992517,5cyclictest1251944-21kworker/u8:2+events_unbound22:22:022
1189373992517,5cyclictest0-21swapper/222:40:122
1189373992517,5cyclictest0-21swapper/219:20:012
1189373992516,6cyclictest0-21swapper/222:00:012
1189373992514,8cyclictest1284745-21sh23:45:002
1189373992514,8cyclictest1284745-21sh23:45:002
1189369992519,3cyclictest0-21swapper/121:40:211
1189369992516,6cyclictest0-21swapper/122:05:001
1189369992514,8cyclictest1291959-21cut00:05:171
1189369992514,8cyclictest1291959-21cut00:05:161
118936699259,7cyclictest11-21ksoftirqd/019:30:240
118936699254,4cyclictest0-21swapper/021:10:200
118936699254,4cyclictest0-21swapper/021:10:200
1189366992518,5cyclictest1234631-21kworker/u8:0+events_unbound22:04:460
1189366992516,7cyclictest1227552-21kworker/u8:2+events_unbound21:16:500
1189366992516,7cyclictest1225773-21kworker/u8:0+events_unbound21:03:550
1189366992516,4cyclictest131rcu_preempt23:42:390
1189366992516,4cyclictest131rcu_preempt23:42:390
1189366992513,3cyclictest131rcu_preempt22:12:230
1189366992513,3cyclictest131rcu_preempt22:12:230
1189377992418,3cyclictest0-21swapper/319:10:253
1189377992416,4cyclictest0-21swapper/319:50:243
1189373992418,3cyclictest0-21swapper/222:15:002
1189373992418,3cyclictest0-21swapper/222:15:002
1189373992417,4cyclictest0-21swapper/221:15:172
1189373992417,4cyclictest0-21swapper/219:55:262
1189373992415,6cyclictest1235521-21sort21:20:192
1189373992415,6cyclictest0-21swapper/219:45:252
1189373992415,6cyclictest0-21swapper/219:45:252
1189369992418,3cyclictest0-21swapper/123:20:001
1189369992418,3cyclictest0-21swapper/119:55:151
1189369992418,3cyclictest0-21swapper/119:35:261
1189369992418,3cyclictest0-21swapper/119:25:251
1189369992414,7cyclictest1278730-21ntpq23:25:181
1189369992414,7cyclictest1278730-21ntpq23:25:181
1189369992414,6cyclictest231ktimers/119:50:061
118936699246,4cyclictest0-21swapper/000:31:070
1189366992413,3cyclictest131rcu_preempt23:30:270
118936699241,19cyclictest0-21swapper/019:24:490
118937399238,12cyclictest311ktimers/220:25:132
1189373992317,3cyclictest0-21swapper/220:35:252
1189373992317,3cyclictest0-21swapper/220:35:252
1189373992317,3cyclictest0-21swapper/200:35:002
1189373992316,4cyclictest1198410-21sh19:35:002
1189369992317,3cyclictest0-21swapper/123:05:151
1189369992316,4cyclictest1297716-21ntpq00:20:201
1189369992315,5cyclictest1209623-21ntpq20:05:201
1189369992315,5cyclictest0-21swapper/100:15:001
1189369992315,5cyclictest0-21swapper/100:15:001
1189369992315,4cyclictest0-21swapper/121:15:271
1189377992215,4cyclictest1266196-21fschecks_time22:50:163
1189373992217,3cyclictest1285989-21unixbench_multi23:45:272
1189373992216,3cyclictest1219082-21sh20:35:002
1189373992216,3cyclictest0-21swapper/200:15:162
1189373992215,3cyclictest0-21swapper/222:55:262
1189373992215,3cyclictest0-21swapper/221:30:172
1189373992214,6cyclictest0-21swapper/200:35:142
1189373992214,5cyclictest311ktimers/200:20:112
1189369992216,3cyclictest0-21swapper/120:20:171
1189369992215,4cyclictest1241671-21cron21:40:011
1189369992215,3cyclictest0-21swapper/123:35:001
118936999221,4cyclictest0-21swapper/123:57:211
1189373992116,3cyclictest0-21swapper/220:15:222
1189373992116,2cyclictest0-21swapper/200:26:142
1189373992114,3cyclictest0-21swapper/221:00:172
1189373992112,6cyclictest0-21swapper/200:10:252
1189373992112,6cyclictest0-21swapper/200:10:242
1189369992115,3cyclictest0-21swapper/121:50:261
1189369992112,6cyclictest1260667-21munin-plugin-st22:35:011
1189369992112,6cyclictest1190373-21cat19:10:241
1189369992111,8cyclictest1236807-21seq21:25:101
1189369992111,7cyclictest1299459-21/usr/sbin/munin00:25:221
1189377992013,5cyclictest1243254-21kworker/u8:3+events_unbound22:34:243
1189377992010,7cyclictest1235223-21df_inode21:20:143
1189373992014,3cyclictest1290245-21fschecks_count00:00:162
1189373992013,5cyclictest311ktimers/220:45:022
1189373992013,3cyclictest0-21swapper/220:05:252
118937399201,14cyclictest1190529-21tail19:10:242
1189369992015,3cyclictest0-21swapper/122:10:141
1189369992015,3cyclictest0-21swapper/122:10:141
1189369992014,4cyclictest231ktimers/123:50:181
1189369992014,3cyclictest0-21swapper/123:20:171
1189369992013,5cyclictest208-21systemd-logind22:08:401
1189369992013,4cyclictest231ktimers/122:45:221
1189369992013,4cyclictest0-21swapper/120:45:001
1189369992013,4cyclictest0-21swapper/120:45:001
118936999201,15cyclictest1213963-21cron20:20:001
1189373991914,3cyclictest1193543-21/usr/sbin/munin19:20:152
1189373991913,3cyclictest0-21swapper/220:20:242
118936999191,14cyclictest1270895-21debian-sa123:05:001
118937399182,11cyclictest1267079-21head22:50:262
1189373991811,5cyclictest311ktimers/222:15:222
1189369991711,3cyclictest645-21runrttasks22:35:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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