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2026-05-31 - 16:57

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 Sun May 31, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1258174996038,18cyclictest1280434-21grep08:10:243
1258168995827,6cyclictest0-21swapper/110:45:001
1258163995242,6cyclictest1296425-21auditctl09:00:010
1258174994924,21cyclictest1277039-21head08:00:273
1258172994936,10cyclictest311ktimers/208:55:122
1258172994840,4cyclictest1317508-21cron10:00:002
1258163994832,12cyclictest121ktimers/009:00:130
1258174994433,7cyclictest1339918-21basename11:05:013
125817499441,38cyclictest1326598-21/usr/sbin/munin10:25:173
1258172994431,9cyclictest311ktimers/209:25:112
1258163994433,8cyclictest0-21swapper/012:30:110
1258174994330,10cyclictest391ktimers/311:30:133
125817499431,4cyclictest0-21swapper/308:45:133
125817499431,37cyclictest1366229-21/usr/sbin/munin12:20:123
125817499431,37cyclictest1316257-21/usr/sbin/munin09:55:153
125817499431,10cyclictest1340151-21apt-get11:05:133
125817499421,4cyclictest0-21swapper/308:25:133
125817499421,38cyclictest1354515-21/usr/sbin/munin11:45:173
125817499421,38cyclictest1329689-21/usr/sbin/munin10:35:273
125817499411,9cyclictest1355904-21apt-get11:50:123
125817499411,4cyclictest0-21swapper/311:25:113
125817499411,4cyclictest0-21swapper/307:55:133
125817499411,37cyclictest1364876-21memory12:15:183
125817499411,37cyclictest1310610-21/usr/sbin/munin09:40:133
125817499411,37cyclictest1287191-21/usr/sbin/munin08:30:273
125817499411,37cyclictest1287191-21/usr/sbin/munin08:30:273
125817499411,37cyclictest1271151-21/usr/sbin/munin07:45:193
125817499411,35cyclictest1363170-21meminfo12:10:183
125817499411,35cyclictest1357723-21diskstats11:55:153
125817499411,35cyclictest1328046-21/usr/sbin/munin10:30:143
125817499411,35cyclictest1290619-21/usr/sbin/munin08:40:243
125817499411,35cyclictest1267793-21/usr/sbin/munin07:35:193
125817499410,7cyclictest1336728-21apt-get10:55:133
1258172994134,4cyclictest1303284-21idleruntime-cro09:20:012
1258172994131,6cyclictest0-21swapper/207:20:012
1258168994132,6cyclictest1361247-21fschecks_time12:05:181
125817499402,35cyclictest1265026-21/usr/sbin/munin07:25:253
125817499401,8cyclictest1335629-21/usr/sbin/munin10:50:223
125817499401,4cyclictest0-21swapper/310:15:143
125817499401,4cyclictest0-21swapper/310:05:133
125817499401,36cyclictest1351636-21/usr/sbin/munin11:35:253
125817499401,36cyclictest1351636-21/usr/sbin/munin11:35:253
125817499401,36cyclictest1315212-21users09:50:253
125817499401,36cyclictest1273121-21/usr/sbin/munin07:50:203
125817499401,35cyclictest1302177-21latency09:15:173
125817499401,35cyclictest1296677-21/usr/sbin/munin09:00:133
125817499401,35cyclictest1293356-21/usr/sbin/munin08:50:153
125817499401,34cyclictest1325039-21memory10:20:193
125817499401,34cyclictest1317878-21/usr/sbin/munin10:00:153
125817499401,34cyclictest1305857-21meminfo09:25:183
125817499401,34cyclictest1281612-21/usr/sbin/munin08:15:213
125817499401,34cyclictest1262624-21/usr/sbin/munin07:20:163
125817499400,2cyclictest0-21swapper/311:15:113
1258172994015,17cyclictest1271450-21ntpq07:45:232
1258172994012,18cyclictest1294805-21sed08:55:012
1258163994033,5cyclictest1345071-21kworker/u8:1+events_unbound11:20:120
125817499392,34cyclictest1288578-21memory08:35:203
125817499392,34cyclictest1260746-21diskstats07:15:153
125817499391,9cyclictest1362113-21users12:05:283
125817499391,4cyclictest0-21swapper/308:20:133
125817499391,35cyclictest1300356-21/usr/sbin/munin09:10:173
125817499391,35cyclictest1295546-21/usr/sbin/munin08:55:233
125817499391,34cyclictest1371781-21df_inode12:35:153
125817499391,33cyclictest1345822-21/usr/sbin/munin11:20:153
125817499391,33cyclictest1321284-21diskstats10:10:133
125817499391,33cyclictest1307204-21/usr/sbin/munin09:30:123
1258172993932,4cyclictest1367187-21unixbench_singl12:20:242
1258172993928,7cyclictest1258535-21fschecks_time07:10:162
1258168993931,6cyclictest231ktimers/108:00:121
1258168993930,5cyclictest1360803-21munin-plugin-st12:05:001
125817499381,4cyclictest0-21swapper/311:40:103
125817499381,34cyclictest1360405-21users12:00:233
125817499381,34cyclictest1333648-21/usr/sbin/munin10:45:173
125817499381,34cyclictest1331569-21/usr/sbin/munin10:40:163
125817499381,34cyclictest1304471-21/usr/sbin/munin09:20:243
125817499381,34cyclictest1304471-21/usr/sbin/munin09:20:243
125817499381,34cyclictest1277829-21/usr/sbin/munin08:05:173
125817499381,34cyclictest1265848-21/usr/sbin/munin07:30:143
125817499381,33cyclictest1308808-21/usr/sbin/munin09:35:123
1258174993813,22cyclictest0-21swapper/312:30:243
125817499380,4cyclictest0-21swapper/307:10:133
125817499380,11cyclictest1368368-21if_eth112:25:173
125817499380,11cyclictest1368368-21if_eth112:25:173
1258172993828,6cyclictest0-21swapper/208:35:002
1258172993828,6cyclictest0-21swapper/208:35:002
1258168993830,5cyclictest204-21dbus-daemon11:10:121
1258168993829,5cyclictest1357386-21idleruntime-cro11:55:011
1258168993828,5cyclictest0-21swapper/108:39:431
1258168993827,8cyclictest1365901-21munin-plugin-st12:20:001
1258163993831,5cyclictest1361170-21kworker/u8:3+events_unbound12:15:230
1258163993831,4cyclictest1289619-21sendmail08:40:000
125817499370,2cyclictest0-21swapper/309:05:123
1258172993729,4cyclictest0-21swapper/208:14:402
1258172993728,6cyclictest1373157-21sendmail12:40:002
1258163993730,5cyclictest1340143-21kworker/u8:2+events_unbound11:35:160
1258163993730,5cyclictest1340143-21kworker/u8:2+events_unbound11:35:160
1258163993729,5cyclictest1324689-21kworker/u8:3+events_unbound11:15:120
125817499362,31cyclictest1270238-21/usr/sbin/munin07:40:263
125817499362,31cyclictest1270238-21/usr/sbin/munin07:40:263
125817499361,32cyclictest1342411-21/usr/sbin/munin11:10:203
125817499361,30cyclictest1312347-21diskstats09:45:153
125817299367,11cyclictest1370404-21runrttasks12:30:172
1258168993627,5cyclictest1317511-21cron10:00:001
1258163993630,4cyclictest1296274-21kworker/u8:3+events_unbound09:55:370
1258163993630,4cyclictest1272300-21kworker/u8:3+events_unbound08:49:460
1258163993623,10cyclictest1282567-21latency_hist08:20:010
1258168993524,7cyclictest0-21swapper/111:35:011
1258168993523,8cyclictest1308136-21grep09:30:231
125816399355,5cyclictest131rcu_preempt07:15:120
1258168993427,4cyclictest1266795-21unixbench_singl07:30:251
1258168993424,7cyclictest1273607-21grep07:50:251
1258168993424,6cyclictest0-21swapper/111:05:261
1258168993424,6cyclictest0-21swapper/109:20:011
1258168993423,7cyclictest0-21swapper/112:25:011
1258168993422,8cyclictest1339909-21auditctl11:05:011
1258163993426,4cyclictest0-21swapper/010:09:540
1258163993425,4cyclictest0-21swapper/012:15:000
125817299337,7cyclictest13285012sed10:30:202
1258172993325,4cyclictest0-21swapper/211:10:112
1258172993324,5cyclictest0-21swapper/209:35:262
1258172993323,6cyclictest0-21swapper/207:55:262
1258172993322,6cyclictest0-21swapper/208:05:262
1258172993319,10cyclictest1369539-21basename12:30:002
1258172993319,10cyclictest1369539-21basename12:30:002
1258172993310,4cyclictest32-21ksoftirqd/208:50:022
1258168993320,8cyclictest204-21dbus-daemon11:45:161
1258163993325,6cyclictest1322347-21kworker/u8:2+events_unbound10:24:570
1258163993325,4cyclictest0-21swapper/010:40:000
1258172993223,5cyclictest0-21swapper/212:10:252
1258172993222,6cyclictest0-21swapper/209:55:012
1258168993225,4cyclictest1319239-21cron10:05:011
1258168993223,5cyclictest1280421-21grep08:10:241
1258168993220,8cyclictest1-21systemd11:55:161
125816399323,5cyclictest131rcu_preempt10:50:130
125816399321,6cyclictest131rcu_preempt12:25:120
125816399321,6cyclictest131rcu_preempt12:25:120
1258172993121,6cyclictest0-21swapper/211:15:252
1258172993121,6cyclictest0-21swapper/210:15:272
1258172993121,6cyclictest0-21swapper/208:20:252
1258172993111,5cyclictest32-21ksoftirqd/208:05:022
1258168993123,5cyclictest0-21swapper/108:30:281
1258168993123,5cyclictest0-21swapper/108:30:281
1258168993123,4cyclictest0-21swapper/111:40:241
1258168993123,4cyclictest0-21swapper/107:35:171
1258168993121,6cyclictest0-21swapper/111:00:011
1258168993119,8cyclictest0-21swapper/110:50:001
1258168993119,7cyclictest0-21swapper/109:50:011
1258163993125,3cyclictest0-21swapper/009:20:010
1258163993124,5cyclictest1278966-21kworker/u8:0+events_unbound08:11:410
1258163993123,5cyclictest1318308-21kworker/u8:1+events_unbound10:17:250
1258163993123,4cyclictest0-21swapper/011:50:000
1258163993122,5cyclictest0-21swapper/008:25:010
125817299309,6cyclictest32-21ksoftirqd/209:30:222
1258172993023,4cyclictest0-21swapper/210:20:162
1258172993023,3cyclictest0-21swapper/207:20:152
1258172993018,3cyclictest131rcu_preempt07:25:052
1258168993018,8cyclictest1270213-21grep07:40:261
1258168993018,8cyclictest1270213-21grep07:40:261
1258163993024,4cyclictest1272300-21kworker/u8:3+events_unbound08:00:120
1258163993023,3cyclictest0-21swapper/007:20:240
1258163993017,9cyclictest204-21dbus-daemon12:00:170
125816399301,25cyclictest1291328-21munin-plugin-st08:45:000
1258172992922,4cyclictest0-21swapper/212:15:152
1258172992921,4cyclictest0-21swapper/211:50:142
1258172992920,5cyclictest0-21swapper/210:05:012
1258172992919,6cyclictest0-21swapper/211:45:002
1258172992916,10cyclictest311ktimers/207:50:112
1258168992921,4cyclictest0-21swapper/109:10:011
1258163992921,5cyclictest1275335-21unixbench_singl07:55:260
1258163992920,7cyclictest1272750-21cut07:50:160
125816399291,5cyclictest131rcu_preempt07:40:130
125816399291,5cyclictest131rcu_preempt07:40:130
125816399290,5cyclictest131rcu_preempt11:40:120
1258172992821,4cyclictest0-21swapper/210:35:162
1258172992818,6cyclictest0-21swapper/209:05:262
1258172992817,7cyclictest0-21swapper/207:40:262
1258172992817,7cyclictest0-21swapper/207:40:262
1258172992816,7cyclictest0-21swapper/209:40:252
1258172992812,5cyclictest32-21ksoftirqd/208:42:352
1258168992819,5cyclictest0-21swapper/110:20:021
1258163992822,4cyclictest1309961-21kworker/u8:0+events_unbound09:49:530
1258163992822,4cyclictest1285787-21unixbench_singl08:25:260
1258163992821,4cyclictest0-21swapper/009:10:260
125816399281,4cyclictest131rcu_preempt11:10:120
1258163992810,4cyclictest131rcu_preempt08:05:130
1258172992721,3cyclictest0-21swapper/211:35:222
1258172992721,3cyclictest0-21swapper/211:35:222
1258172992720,3cyclictest0-21swapper/211:20:142
1258172992717,7cyclictest1-21systemd10:45:012
1258172992717,6cyclictest0-21swapper/211:45:252
1258172992717,4cyclictest131rcu_preempt12:00:522
1258168992719,5cyclictest0-21swapper/109:35:261
1258168992719,4cyclictest0-21swapper/108:15:171
1258168992717,6cyclictest0-21swapper/110:25:251
125816399272,4cyclictest131rcu_preempt08:30:150
125816399272,4cyclictest131rcu_preempt08:30:150
1258163992723,2cyclictest13550irq/42-30be0000.ethernet09:20:040
1258163992723,2cyclictest13550irq/42-30be0000.ethernet09:20:040
1258163992721,3cyclictest0-21swapper/007:10:170
1258163992720,5cyclictest1318308-21kworker/u8:1+events_unbound10:25:180
1258163992720,4cyclictest13550irq/42-30be0000.ethernet12:35:240
1258163992720,4cyclictest13550irq/42-30be0000.ethernet11:30:250
1258163992719,4cyclictest0-21swapper/011:55:010
1258163992718,6cyclictest0-21swapper/010:45:010
125817299268,12cyclictest32-21ksoftirqd/209:10:232
125817299265,11cyclictest32-21ksoftirqd/210:47:532
1258172992616,5cyclictest131rcu_preempt11:25:432
1258172992613,7cyclictest131rcu_preempt10:56:262
1258168992619,5cyclictest208-21systemd-logind07:18:401
1258168992619,4cyclictest0-21swapper/107:45:171
1258168992619,4cyclictest0-21swapper/107:10:261
1258168992618,5cyclictest0-21swapper/109:40:181
1258163992619,5cyclictest1309961-21kworker/u8:0+events_unbound10:02:070
1258163992618,5cyclictest0-21swapper/010:30:260
1258163992617,6cyclictest1362491-21sh12:10:000
1258163992615,7cyclictest0-21swapper/009:40:010
125817299259,4cyclictest0-21swapper/211:34:462
125817299258,8cyclictest131rcu_preempt09:47:362
125817299258,8cyclictest131rcu_preempt07:35:552
125817299253,6cyclictest32-21ksoftirqd/210:50:342
1258172992510,9cyclictest131rcu_preempt12:06:522
1258172992510,8cyclictest131rcu_preempt11:07:472
1258172992510,8cyclictest131rcu_preempt11:01:572
1258168992519,3cyclictest0-21swapper/109:50:241
1258168992518,5cyclictest164-21systemd-journal08:48:401
1258168992517,5cyclictest0-21swapper/107:20:241
1258168992515,6cyclictest1336054-21grep10:50:261
125816399252,6cyclictest1299846-21munin-plugin-st09:10:010
1258163992519,4cyclictest1258158-21cyclictest07:30:160
1258163992517,5cyclictest0-21swapper/007:45:270
1258163992516,6cyclictest1268496-21grep07:35:260
125816399251,13cyclictest0-21swapper/011:10:010
125817299249,8cyclictest131rcu_preempt09:02:222
125817299248,9cyclictest131rcu_preempt10:26:222
125817299248,9cyclictest131rcu_preempt08:28:252
1258172992417,3cyclictest0-21swapper/208:35:162
1258172992416,5cyclictest0-21swapper/210:05:262
1258172992411,6cyclictest131rcu_preempt11:56:382
125817299241,13cyclictest0-21swapper/208:15:092
1258172992410,11cyclictest1305133-21seq09:24:392
1258172992410,11cyclictest1305133-21seq09:24:392
125817299240,16cyclictest0-21swapper/210:12:122
1258168992417,4cyclictest0-21swapper/109:20:261
1258168992417,4cyclictest0-21swapper/109:20:261
1258168992416,5cyclictest231ktimers/107:25:231
1258168992410,9cyclictest204-21dbus-daemon08:29:411
125816399242,18cyclictest1359068-21cron12:00:000
1258163992417,3cyclictest0-21swapper/010:56:400
1258163992417,3cyclictest0-21swapper/010:10:540
125816399241,5cyclictest131rcu_preempt08:50:130
1258163992415,5cyclictest0-21swapper/007:25:540
125816399241,19cyclictest0-21swapper/009:25:450
1258172992317,3cyclictest0-21swapper/207:30:172
1258168992315,5cyclictest0-21swapper/111:30:001
1258168992315,5cyclictest0-21swapper/109:10:261
1258168992314,6cyclictest0-21swapper/112:35:211
1258163992317,3cyclictest1311628-21runrttasks09:40:400
1258163992317,3cyclictest0-21swapper/011:00:250
1258163992316,5cyclictest1332847-21kworker/u8:0+events_unbound10:48:540
1258163992316,3cyclictest0-21swapper/009:53:010
125816399231,18cyclictest0-21swapper/009:31:250
1258168992216,3cyclictest0-21swapper/110:20:231
1258168992215,4cyclictest0-21swapper/109:25:241
1258168992214,6cyclictest1294486-21kworker/u8:1+events_unbound08:53:271
1258168992214,5cyclictest231ktimers/111:35:161
1258168992214,5cyclictest231ktimers/111:35:161
1258168992214,5cyclictest0-21swapper/108:05:261
1258168992214,4cyclictest0-21swapper/110:35:171
1258163992212,7cyclictest1347202-21sshd11:25:130
125816899211,15cyclictest1290899-21unixbench_singl08:40:261
1258168992014,3cyclictest0-21swapper/110:05:241
1258168992013,5cyclictest231ktimers/112:30:051
1258168992011,6cyclictest0-21swapper/111:20:191
125816899201,14cyclictest1321305-21fschecks_count10:10:141
125816899198,6cyclictest1274481-21cut07:55:161
1258168991914,3cyclictest0-21swapper/112:10:201
1258168991912,5cyclictest0-21swapper/112:30:011
1258168991812,4cyclictest231ktimers/112:25:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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