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2026-09-03 - 09:18
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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 rackbslot7.osadl.org (updated Thu Sep 03, 2026 00:44:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
295449912438,34cyclictest0-21swapper/022:50:120
295449911651,54cyclictest24079-21apt-get21:40:120
295449911637,30cyclictest0-21swapper/021:50:170
295679910839,12cyclictest0-21swapper/222:10:312
295679910741,11cyclictest0-21swapper/223:00:002
295679910536,14cyclictest0-21swapper/222:35:042
295679910536,14cyclictest0-21swapper/222:35:042
295449910545,20cyclictest8042-21apt-get21:15:450
295679910445,51cyclictest0-21swapper/221:40:382
295679910439,10cyclictest0-21swapper/219:50:042
295679910435,15cyclictest0-21swapper/223:14:432
295449910441,22cyclictest20664-21cat00:05:260
295449910436,27cyclictest22900-21ssh22:27:400
295449910239,53cyclictest0-21swapper/023:15:110
295449910239,53cyclictest0-21swapper/023:15:110
295679910172,22cyclictest200-21systemd-journal22:00:002
29567991013,39cyclictest23371-21head20:25:352
29567991013,38cyclictest26550-21latency_hist00:15:022
295679910131,21cyclictest31061-21cron19:15:012
295449910134,28cyclictest17557-21latency_hist21:30:040
295449910134,28cyclictest17557-21latency_hist21:30:040
29567991003,44cyclictest28065-21tr21:45:342
295449910039,19cyclictest5282-21grep23:40:370
29567999937,20cyclictest17495-21fschecks_time00:00:212
29567999937,11cyclictest0-21swapper/220:35:002
2955799993,77cyclictest20965-21apt-get22:25:161
2956799974,40cyclictest343-21runrttasks23:04:532
2956799974,40cyclictest343-21runrttasks23:04:532
2956799974,35cyclictest7650-21/usr/sbin/munin22:05:372
2956799973,77cyclictest17660-21ssh22:20:292
2956799973,29cyclictest14353-21uniq22:15:212
2955799974,59cyclictest10820-21apt-get23:50:161
29544999734,24cyclictest23926-21latency_hist20:30:030
29544999730,24cyclictest14099-21ssh21:24:560
2956799967,44cyclictest21128-21ssh22:25:352
29544999633,23cyclictest7863-21grep19:40:230
29567999543,11cyclictest29536-21cyclictest22:39:402
2956799953,41cyclictest20433-21acpi00:05:152
2956799953,30cyclictest17367-21latency_hist20:10:032
29544999535,21cyclictest14452-21cpuspeed20:00:400
29544999534,23cyclictest18332-21xargs20:10:340
29544999533,25cyclictest30428-21taskset23:30:210
29544999530,27cyclictest27423-21cstates20:40:180
29544999529,26cyclictest0-21swapper/020:55:150
29544999529,26cyclictest0-21swapper/020:55:150
2956799944,45cyclictest691-21latency_hist23:35:022
2955799943,74cyclictest2822-21modprobe19:25:151
29544999434,25cyclictest4269-21diskmemload21:30:340
29544999432,25cyclictest24570-21ntpq20:30:290
29544999431,20cyclictest18721-21kworker/u17:3+xprtiod00:14:310
2956799933,36cyclictest14251-21cmp20:00:042
29557999371,15cyclictest27714-21rm22:35:241
29544999342,36cyclictest0-21swapper/023:35:150
29544999328,29cyclictest19001-21ssh23:11:520
2956799924,39cyclictest742-21latency_hist19:20:032
29544999257,20cyclictest2918-21apt-get21:05:160
29544999235,42cyclictest10843-21ssh23:50:150
29544999232,24cyclictest19874-21swap20:15:340
29544999232,24cyclictest19874-21swap20:15:340
29544999229,29cyclictest16486-21ntpq20:05:330
2955799913,50cyclictest8042-21apt-get21:15:201
29544999135,14cyclictest21116-21tune2fs21:35:230
29544999133,22cyclictest17848-21ssh00:00:300
29544999133,18cyclictest9819-21awk19:45:340
29544999131,26cyclictest27038-21sh23:25:150
29544999127,25cyclictest0-21swapper/022:40:390
29567999048,11cyclictest181rcu_preempt23:35:132
29544999034,36cyclictest662-21cron23:50:000
29544999031,25cyclictest21716-21unixbench_multi20:20:360
2956799893,63cyclictest11059-21cstates23:50:392
29544998935,23cyclictest25765-21ssh22:31:520
29544998935,23cyclictest25765-21ssh22:31:520
29544998933,22cyclictest27603-21ssh00:15:350
29544998933,22cyclictest27603-21ssh00:15:350
29544998932,27cyclictest6975-21cut00:35:030
29544998932,27cyclictest6975-21cut00:35:030
29544998930,23cyclictest10742-21latency_hist23:00:030
29544998929,28cyclictest0-21swapper/000:35:380
29544998929,25cyclictest16564-21sh22:19:020
29544998924,28cyclictest0-21swapper/000:23:390
29567998838,9cyclictest0-21swapper/219:25:182
2956799883,37cyclictest29923-21ssh00:20:042
2956799883,37cyclictest29923-21ssh00:20:042
2956799883,36cyclictest1055-21grep00:25:222
29567998812,66cyclictest6387-21kworker/u18:1+flush-179:021:15:272
29557998848,14cyclictest25160-21ssh00:11:411
29544998835,46cyclictest4606-21taskset21:10:130
29544998835,46cyclictest4606-21taskset21:10:130
29544998835,38cyclictest343-21runrttasks00:27:590
29544998833,24cyclictest16967-21date00:00:030
29544998830,22cyclictest13788-21chrt19:59:440
29544998824,30cyclictest24121-21fschecks_time23:20:240
2956799871,41cyclictest8186-21grep19:40:292
29557998766,15cyclictest1-21systemd23:00:001
2955799873,64cyclictest16970-21apt-get22:20:161
29544998731,19cyclictest4668-21df_inode22:00:200
29544998731,19cyclictest4668-21df_inode22:00:200
29544998632,23cyclictest31514-21grep19:15:070
29544998632,20cyclictest17699-21chrt22:20:340
2956799859,27cyclictest14354-21apt-get20:00:182
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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