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2026-04-20 - 02:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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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: ondemand
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack5slot4s.osadl.org (updated Mon Apr 20, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
118953922680,3sleep375-21kworker/3:1-events23:31:183
124626721830,2sleep3471rcuc/300:26:203
927723996561,3cyclictest1002796-21kworker/u8:2+events_unbound20:21:292
927720996155,5cyclictest1002796-21kworker/u8:2+flush-8:020:31:291
927720996144,4cyclictest1002796-21kworker/u8:2+events_unbound20:26:141
927723996055,4cyclictest1002796-21kworker/u8:2+flush-8:021:01:292
927720996055,3cyclictest988919-21kworker/u8:0+events_unbound20:16:261
927720996047,5cyclictest1013882-21kworker/u8:0+flush-8:021:56:171
927720996047,5cyclictest1013882-21kworker/u8:0+flush-8:021:56:171
927720995852,4cyclictest954199-21kworker/u8:2+flush-8:019:56:281
927720995850,6cyclictest1088260-21kworker/u8:1+flush-8:021:51:241
927720995850,6cyclictest1088260-21kworker/u8:1+flush-8:021:51:241
10639092580,5sleep20-21swapper/221:25:012
927720995651,4cyclictest1211580-21kworker/u8:1+events_unbound00:36:141
927720995651,3cyclictest1013882-21kworker/u8:0+flush-8:022:41:271
927720995651,3cyclictest1013882-21kworker/u8:0+events_unbound21:26:271
927720995651,3cyclictest1002796-21kworker/u8:2+events_unbound20:41:271
927720995650,4cyclictest1013882-21kworker/u8:0+flush-8:022:51:271
927720995550,3cyclictest1123400-21kworker/u8:2+events_unbound23:51:261
927720995550,3cyclictest1123400-21kworker/u8:2+events_unbound23:51:261
927720995549,5cyclictest95632-21kworker/u8:0+events_unbound19:15:031
927720995549,5cyclictest1013882-21kworker/u8:0+events_unbound22:26:141
927720995549,4cyclictest1002796-21kworker/u8:2+events_unbound21:15:011
927720995548,5cyclictest95632-21kworker/u8:0+flush-8:019:21:241
9860412540,4sleep1281rcuc/120:06:191
927720995449,3cyclictest1013882-21kworker/u8:0+events_unbound23:11:221
927720995448,5cyclictest1123400-21kworker/u8:2+flush-8:023:56:281
927720995448,5cyclictest1123400-21kworker/u8:2+flush-8:023:56:281
927720995347,5cyclictest1013882-21kworker/u8:0+flush-8:022:31:231
927720995347,4cyclictest1123400-21kworker/u8:2+events_unbound23:16:271
927723995247,4cyclictest1182923-21kworker/u8:3+flush-8:023:46:272
927720995246,5cyclictest101845-21kworker/u8:1+flush-8:020:46:241
927720995246,4cyclictest1013882-21kworker/u8:0+events_unbound22:15:011
927720995237,5cyclictest1002796-21kworker/u8:2+events_unbound21:36:271
12428702520,4sleep1281rcuc/100:25:011
927720995147,3cyclictest964257-21kworker/u8:3+events_unbound20:01:271
927720995146,3cyclictest1211580-21kworker/u8:1+flush-8:000:16:241
927720995140,5cyclictest1013882-21kworker/u8:0+events_unbound21:31:131
927723995045,4cyclictest1217707-21kworker/u8:4+events_unbound00:21:312
927720995043,5cyclictest1013882-21kworker/u8:0+flush-8:020:56:231
927720995042,6cyclictest4184474-21kworker/u8:3+flush-8:019:31:231
927717995043,5cyclictest932596-21latency_hist19:15:010
927720994942,6cyclictest1013882-21kworker/u8:0+events_unbound22:56:241
927720994942,5cyclictest101845-21kworker/u8:1+flush-8:021:16:251
927717994944,3cyclictest1182923-21kworker/u8:3+flush-8:023:26:280
927723994844,3cyclictest4184474-21kworker/u8:3+events_unbound19:11:252
927723994843,4cyclictest1211580-21kworker/u8:1+events_unbound00:06:332
927720994843,4cyclictest1088260-21kworker/u8:1+flush-8:022:21:241
927720994843,3cyclictest1238040-21kworker/u8:0+events_unbound00:26:181
927720994841,5cyclictest1123400-21kworker/u8:2+flush-8:023:06:251
927717994836,9cyclictest1082741-21ntpq21:41:220
927720994741,5cyclictest1088260-21kworker/u8:1+flush-8:022:16:241
927720994741,4cyclictest1182923-21kworker/u8:3+events_unbound23:26:181
927720994741,4cyclictest1002796-21kworker/u8:2+flush-8:021:21:241
927717994739,6cyclictest988919-21kworker/u8:0+flush-8:020:11:240
927720994641,4cyclictest4184474-21kworker/u8:3+events_unbound19:26:251
927720994639,5cyclictest101845-21kworker/u8:1+events_unbound19:36:171
927723994533,9cyclictest1177507-21apt-get23:20:002
927720994539,4cyclictest101845-21kworker/u8:1+events_unbound20:21:191
927720994539,4cyclictest1002796-21kworker/u8:2+flush-8:020:40:011
927717994540,3cyclictest1053698-21gpgv21:15:000
927720994440,3cyclictest1088260-21kworker/u8:1+events_unbound22:36:241
927720994437,5cyclictest1013882-21kworker/u8:0+events_unbound20:51:211
927717994433,9cyclictest1127255-21ntpq22:26:240
927723994338,3cyclictest101845-21kworker/u8:1+events_unbound19:36:132
927720994337,5cyclictest954199-21kworker/u8:2+flush-8:019:46:221
927720994336,5cyclictest1013882-21kworker/u8:0+flush-8:021:41:231
927720994235,5cyclictest954199-21kworker/u8:2+events_unbound19:41:231
927720994234,6cyclictest1077828-21kworker/u8:3+flush-8:021:46:241
927720994136,4cyclictest964257-21kworker/u8:3+events_unbound19:51:171
927720994133,6cyclictest1123400-21kworker/u8:2+events_unbound23:41:251
927717994134,5cyclictest1123400-21kworker/u8:2+flush-8:023:51:270
927717994134,5cyclictest1123400-21kworker/u8:2+flush-8:023:51:260
927723994036,3cyclictest1088260-21kworker/u8:1+events_unbound22:16:302
927723994035,4cyclictest1088260-21kworker/u8:1+events_unbound21:51:292
927723994035,4cyclictest1088260-21kworker/u8:1+events_unbound21:51:292
927720994035,4cyclictest1217707-21kworker/u8:4+events_unbound00:11:131
927720994034,4cyclictest1123400-21kworker/u8:2+flush-8:023:21:121
927720994034,4cyclictest1047909-21ntpq21:06:251
927720994033,5cyclictest1088260-21kworker/u8:1+events_unbound22:01:251
927717994036,3cyclictest1211580-21kworker/u8:1+flush-8:000:01:290
927720993932,5cyclictest1123400-21kworker/u8:2+flush-8:023:01:191
927720993931,5cyclictest1211580-21kworker/u8:1+flush-8:000:01:141
927717993935,3cyclictest1013882-21kworker/u8:0+flush-8:021:56:210
927717993935,3cyclictest1013882-21kworker/u8:0+flush-8:021:56:210
927717993934,3cyclictest101845-21kworker/u8:1+flush-8:020:36:150
927717993931,6cyclictest1237792-21latency_hist00:20:000
927717993930,6cyclictest1207504-21latency_hist23:50:010
927720993731,4cyclictest988919-21kworker/u8:0+flush-8:020:11:161
927720993730,5cyclictest1217707-21kworker/u8:4+flush-8:000:31:201
927720993730,4cyclictest4184474-21kworker/u8:3+events_unbound19:11:171
927717993731,4cyclictest964257-21kworker/u8:3+events_unbound19:56:220
927717993728,7cyclictest280-21systemd-journal19:15:050
927717993728,6cyclictest1257629-21latency_hist00:40:010
927717993631,3cyclictest964257-21kworker/u8:3+flush-8:019:51:240
927717993630,5cyclictest1013882-21kworker/u8:0+flush-8:022:46:300
927717993630,4cyclictest1182923-21kworker/u8:3+flush-8:000:06:210
927717993630,4cyclictest1013882-21kworker/u8:0+flush-8:023:11:300
9274462364,10sleep10-21swapper/119:08:371
927720993529,4cyclictest1123400-21kworker/u8:2+flush-8:022:46:191
927717993528,5cyclictest944413-21latency_hist19:25:010
927723993427,5cyclictest280-21systemd-journal19:35:002
927720993429,4cyclictest1013882-21kworker/u8:0+flush-8:022:07:031
927720993426,6cyclictest1206661-21ntpq23:46:231
927717993430,3cyclictest1088260-21kworker/u8:1+flush-8:023:21:280
927717993429,3cyclictest964257-21kworker/u8:3+flush-8:020:06:300
927717993424,7cyclictest1142925-21latency_hist22:45:010
927720993329,3cyclictest1123400-21kworker/u8:2+events_unbound23:36:311
927717993329,3cyclictest1077828-21kworker/u8:3+flush-8:021:46:270
927717993327,4cyclictest983891-21grep20:01:310
927717993326,5cyclictest954642-21apt-get19:36:090
927723993227,4cyclictest1217707-21kworker/u8:4+flush-8:000:39:422
927717993227,3cyclictest4184474-21kworker/u8:3+events_unbound19:31:220
927717993225,5cyclictest1033632-21grep20:51:300
927723993124,5cyclictest1232884-21cat00:15:012
927717993125,4cyclictest988919-21kworker/u8:0+flush-8:020:16:280
927717993125,4cyclictest280-21systemd-journal22:50:510
927717993125,4cyclictest1088260-21kworker/u8:1+events_unbound22:11:280
927723993027,2cyclictest999086-21apt-get20:20:012
927723993026,2cyclictest1163045-21aten2_r5power_c23:06:112
927723993022,6cyclictest1037953-21grep20:56:212
927720993024,4cyclictest1227621-21apt-key00:10:011
927717993025,3cyclictest1123400-21kworker/u8:2+events_unbound23:06:270
927717993024,5cyclictest1211580-21kworker/u8:1+events_unbound00:10:030
927723992924,3cyclictest1078325-21unixbench_singl21:36:302
927723992924,3cyclictest1013882-21kworker/u8:0+flush-8:022:30:062
927720992921,6cyclictest1039229-21apt-get21:01:091
927717992926,1cyclictest1157723-21latency_hist23:00:010
927717992925,3cyclictest1088260-21kworker/u8:1+events_unbound22:36:260
927717992924,3cyclictest954199-21kworker/u8:2+flush-8:019:41:250
927717992924,3cyclictest1088260-21kworker/u8:1+flush-8:022:21:140
927717992923,5cyclictest1002796-21kworker/u8:2+flush-8:020:41:210
927717992923,4cyclictest1088260-21kworker/u8:1+events_unbound22:01:270
927717992919,8cyclictest1038035-21ntpq20:56:230
927723992824,3cyclictest964257-21kworker/u8:3+events_unbound19:42:242
927723992824,2cyclictest948993-21unixbench_multi19:26:302
927717992824,2cyclictest1003380-21needreboot20:21:220
927717992823,4cyclictest4184474-21kworker/u8:3+flush-8:019:26:200
927717992823,4cyclictest1238040-21kworker/u8:0+events_unbound00:26:280
927717992822,4cyclictest1123400-21kworker/u8:2+events_unbound23:16:130
927723992723,2cyclictest1178407-21fschecks_time23:21:122
927723992723,2cyclictest1123767-21fschecks_count22:26:152
927717992723,3cyclictest1123400-21kworker/u8:2+events_unbound23:01:290
927717992721,5cyclictest1211580-21kworker/u8:1+flush-8:023:56:140
927717992721,5cyclictest1211580-21kworker/u8:1+flush-8:023:56:130
927717992720,5cyclictest927576-21latency_hist19:10:010
927717992718,7cyclictest1013282-21ntpq20:31:230
927723992622,2cyclictest1247338-21unixbench_multi00:26:292
927723992622,2cyclictest1147498-21unixbench_multi22:46:302
927723992622,2cyclictest1079296-21fschecks_count21:41:142
927723992619,2cyclictest161rcu_preempt23:36:132
927720992622,3cyclictest1123400-21kworker/u8:2+events_unbound23:31:291
927717992622,2cyclictest101845-21kworker/u8:1+events_unbound20:46:120
927717992621,4cyclictest1217707-21kworker/u8:4+flush-8:000:21:240
927717992621,3cyclictest1118201-21/usr/sbin/munin22:20:010
927717992620,4cyclictest1013882-21kworker/u8:0+flush-8:021:31:200
927717992620,4cyclictest1013882-21kworker/u8:0+flush-8:021:26:300
927723992521,3cyclictest95632-21kworker/u8:0+flush-8:019:15:102
927723992521,3cyclictest1013882-21kworker/u8:0+events_unbound22:06:202
927723992521,2cyclictest1198058-21aten2_r5power_v23:41:132
927723992519,4cyclictest1023749-21unixbench_singl20:41:302
92771799252,22cyclictest0-21swapper/021:01:290
927717992518,5cyclictest280-21systemd-journal21:37:390
927723992420,2cyclictest969773-21aten2_r5power_c19:51:102
927723992419,3cyclictest0-21swapper/200:00:002
927723992419,3cyclictest0-21swapper/200:00:002
927723992418,4cyclictest413-21systemd-logind23:05:002
92772399240,9cyclictest11499701kthreadcore22:51:172
927717992421,1cyclictest1202548-21latency_hist23:45:010
927717992420,3cyclictest101845-21kworker/u8:1+flush-8:021:16:300
927717992418,4cyclictest1002796-21kworker/u8:2+flush-8:020:26:160
927717992416,7cyclictest1002796-21kworker/u8:2+flush-8:021:21:270
927723992319,3cyclictest954199-21kworker/u8:2+events_unbound20:06:432
927723992319,2cyclictest1118628-21aten2_r5power_p22:21:112
927723992319,2cyclictest1083998-21aten2_r5power_e21:46:112
927723992318,4cyclictest1029003-21idleruntime-cro20:50:002
927723992318,3cyclictest988919-21kworker/u8:0+events_unbound20:10:092
927723992312,9cyclictest1237812-21awk00:20:002
92771799232,20cyclictest0-21swapper/022:06:270
927717992317,4cyclictest1133065-21latency_hist22:35:010
927717992317,4cyclictest1047845-21needreboot21:06:230
10187912230,5sleep3451irq_work/320:36:303
927723992218,2cyclictest1008850-21unixbench_multi20:26:312
927723992218,2cyclictest0-21swapper/221:15:012
927717992220,1cyclictest0-21swapper/000:31:110
927717992217,4cyclictest1123400-21kworker/u8:2+flush-8:023:34:210
92772399212,5cyclictest0-21swapper/200:32:312
92772399212,4cyclictest0-21swapper/221:06:132
927723992118,2cyclictest1102998-21grep22:01:302
927723992117,2cyclictest1188233-21cpuspeed_turbos23:31:122
927717992116,3cyclictest0-21swapper/023:36:190
92772399206,4cyclictest280-21systemd-journal20:05:002
92772399202,5cyclictest0-21swapper/221:56:102
92772399202,5cyclictest0-21swapper/221:56:102
92772399202,5cyclictest0-21swapper/219:55:382
92772399202,2cyclictest0-21swapper/219:21:222
927723992016,3cyclictest1123400-21kworker/u8:2+events_unbound23:26:372
927723992016,3cyclictest101845-21kworker/u8:1+flush-8:020:37:342
927723992016,2cyclictest1138660-21cut22:41:132
92772399200,4cyclictest1064137-21apt-get21:26:112
927717992016,2cyclictest0-21swapper/021:51:140
927717992016,2cyclictest0-21swapper/021:51:140
9227432203,8sleep30-21swapper/319:05:023
92772399192,12cyclictest1211599-21ntpq23:51:222
92772399192,12cyclictest1211599-21ntpq23:51:212
927723991914,3cyclictest371rcuc/221:16:172
927717991914,4cyclictest954199-21kworker/u8:2+events_unbound19:46:240
9269592193,9sleep20-21swapper/219:06:292
9846852180,3chrt75-21kworker/3:1-events20:06:133
92772399189,7cyclictest1032436-21tr20:51:202
92772399187,2cyclictest161rcu_preempt19:50:002
92772399176,2cyclictest161rcu_preempt23:15:002
92772399171,7cyclictest161rcu_preempt20:31:222
927723991713,2cyclictest1073345-21unixbench_singl21:31:302
927723991712,3cyclictest0-21swapper/222:36:202
927723991712,3cyclictest0-21swapper/200:01:192
92772399170,5cyclictest1108701-21aten2_r5power_e22:11:102
92772399163,1cyclictest0-21swapper/222:56:232
12381522152,8sleep30-21swapper/300:21:113
10244112152,8sleep30-21swapper/320:46:103
11068972143,7sleep30-21swapper/322:06:203
9898922132,7sleep30-21swapper/320:11:153
11783322132,7sleep30-21swapper/323:21:123
9833202122,6sleep30-21swapper/320:01:233
9749482122,6sleep30-21swapper/319:56:143
9739742122,6sleep30-21swapper/319:51:293
9693932122,6sleep30-21swapper/319:50:003
9636022122,6sleep30-21swapper/319:41:223
9493392122,6sleep30-21swapper/319:29:503
9419472121,6sleep30-21swapper/319:21:193
9326122122,5sleep30-21swapper/319:15:013
9312682122,6sleep30-21swapper/319:11:193
12570992122,6sleep30-21swapper/300:36:313
12477292122,6sleep30-21swapper/300:30:023
12228872122,6sleep30-21swapper/300:06:143
12166812122,6sleep30-21swapper/323:56:273
12166812122,6sleep30-21swapper/323:56:273
12068672122,6sleep30-21swapper/323:46:283
11827072122,5sleep30-21swapper/323:25:003
11731332122,6sleep30-21swapper/323:16:143
11588872122,6sleep30-21swapper/323:01:173
11535032122,6sleep30-21swapper/322:56:163
11479592122,5sleep30-21swapper/322:50:023
11420852122,6sleep30-21swapper/322:41:233
11378872122,6sleep30-21swapper/322:38:493
11231902122,6sleep30-21swapper/322:25:023
11152022123,5sleep30-21swapper/322:16:193
11097932122,6sleep30-21swapper/322:11:183
10905222122,6sleep30-21swapper/321:51:193
10905222122,6sleep30-21swapper/321:51:183
10748662122,6sleep30-21swapper/321:36:183
10643852122,6sleep30-21swapper/321:26:153
10588772122,5sleep30-21swapper/321:20:013
10489372122,5sleep30-21swapper/321:10:023
10484152122,6sleep30-21swapper/321:06:323
10436462122,6sleep30-21swapper/321:02:523
10293462122,6sleep30-21swapper/320:51:113
10126352123,5sleep30-21swapper/320:31:223
10088792122,6sleep30-21swapper/320:26:323
9991882111,6sleep30-21swapper/320:20:023
9968872112,5sleep30-21swapper/320:16:213
9546462112,6sleep30-21swapper/319:36:123
9495922112,5sleep30-21swapper/319:30:023
12331642112,5sleep30-21swapper/300:16:093
12283492112,5sleep30-21swapper/300:11:163
12218592112,5sleep30-21swapper/300:01:293
12075222112,5sleep30-21swapper/323:50:013
12075222112,5sleep30-21swapper/323:50:013
11979192112,5sleep30-21swapper/323:41:103
11936862112,5sleep30-21swapper/323:36:173
11679522112,5sleep30-21swapper/323:11:133
11667242112,5sleep30-21swapper/323:06:233
11432652112,5sleep30-21swapper/322:46:133
11284412112,5sleep30-21swapper/322:31:123
11184962113,5sleep30-21swapper/322:20:533
10987612112,5sleep30-21swapper/322:01:103
10937372112,5sleep30-21swapper/321:55:163
10937372112,5sleep30-21swapper/321:55:163
10836292112,5sleep30-21swapper/321:45:013
10789102112,5sleep30-21swapper/321:40:163
10690762112,5sleep30-21swapper/321:31:133
10541492112,5sleep30-21swapper/321:15:163
10378602112,6sleep30-21swapper/320:56:223
10193642102,5sleep30-21swapper/320:40:043
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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