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2026-09-23 - 02:22
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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 Tue Sep 22, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2818821089,72sleep228278-21sed07:05:382
2942121030,6sleep00-21swapper/010:44:100
522321020,9sleep20-21swapper/210:58:342
287419910159,32cyclictest0-21swapper/012:14:170
287419910159,32cyclictest0-21swapper/012:14:170
287489910082,11cyclictest731-21sendmail12:38:411
2874899993,36cyclictest8472-21chrt07:44:101
28753999769,20cyclictest2399-21apt-key10:53:462
28748999741,49cyclictest22448-21timerandwakeup12:19:151
28748999440,48cyclictest0-21swapper/111:08:411
28748999358,30cyclictest28730-21cyclictest08:54:041
2874199937,59cyclictest15-21ksoftirqd/011:09:020
28741999264,19cyclictest5790-21timerwakeupswit07:34:170
28741999165,20cyclictest24701-21latency_hist09:43:440
272412916,57sleep026760-21apt-get07:03:530
28748999043,40cyclictest10082-21fschecks_count09:19:051
28748999042,40cyclictest0-21swapper/110:58:421
2874899893,36cyclictest17762-21/usr/sbin/munin11:19:071
2874899893,36cyclictest17762-21/usr/sbin/munin11:19:071
28741998929,38cyclictest0-21swapper/011:14:180
2874899883,31cyclictest28635-21grep08:44:141
28741998857,22cyclictest21308-21netstat11:24:090
28753998760,21cyclictest11801-21apt-get11:09:022
28753998732,14cyclictest0-21swapper/211:49:092
2874899874,34cyclictest6150-21rm10:05:151
2874899874,31cyclictest3974-21sendmail_mailqu07:29:141
2874899874,31cyclictest3974-21sendmail_mailqu07:29:141
2874899873,41cyclictest25574-21processes09:44:151
2874899873,41cyclictest25574-21processes09:44:151
2874899873,33cyclictest1983-21fschecks_count09:59:031
2874899873,33cyclictest1983-21fschecks_count09:59:031
2874899873,30cyclictest31947-21sh09:55:131
28748998667,12cyclictest3322-21sh11:48:451
28748998667,12cyclictest3322-21sh11:48:451
28748998665,15cyclictest20807-21threads10:29:221
2874899864,31cyclictest26429-21/usr/sbin/munin08:38:531
2874899864,31cyclictest26429-21/usr/sbin/munin08:38:531
28748998637,41cyclictest0-21swapper/112:03:591
2874899863,37cyclictest13275-21grep11:10:261
2874899863,37cyclictest10734-21ssh10:13:571
2874899863,36cyclictest26933-21/usr/sbin/munin11:33:581
2874899863,33cyclictest10605-21grep12:00:091
2874899863,32cyclictest18885-21timerandwakeup08:14:171
2874899863,32cyclictest13006-21latency_hist07:58:451
2874899863,31cyclictest6403-21/usr/sbin/munin11:54:051
2874899863,31cyclictest4149-21ps11:49:181
2874899863,31cyclictest22890-21ssh09:39:171
2874899863,30cyclictest29010-21grep09:49:221
2874899863,29cyclictest10977-21grep07:49:181
2874199864,71cyclictest1357-21cron09:58:410
2874899854,38cyclictest19692-21switchtime09:34:171
2874899854,38cyclictest19692-21switchtime09:34:171
2874899854,32cyclictest26675-21unin-run11:33:421
2874899854,30cyclictest25537-21modprobe10:38:411
2874899854,30cyclictest25537-21modprobe10:38:411
28748998541,36cyclictest0-21swapper/111:39:171
2874899853,33cyclictest2826-21switchtime09:04:151
2874899853,32cyclictest29546-21grep10:44:141
2874899853,31cyclictest8155-21cmp07:43:441
2874899853,31cyclictest8155-21cmp07:43:441
2874899853,31cyclictest24413-21latency_hist08:33:431
2874899853,31cyclictest24413-21latency_hist08:33:431
28748998514,24cyclictest30129-21netstat08:49:101
28741998558,17cyclictest6492-21latency_hist09:13:450
28741998558,17cyclictest6492-21latency_hist09:13:450
2874899845,32cyclictest31447-21grep07:14:121
2874899844,32cyclictest8558-21switchtime10:09:201
2874899844,32cyclictest8558-21switchtime10:09:201
2874899844,32cyclictest31854-21/usr/sbin/munin10:49:241
2874899844,30cyclictest14019-21sshd07:59:171
2874899844,30cyclictest14019-21sshd07:59:171
2874899843,34cyclictest5219-21tune2fs07:34:041
2874899843,33cyclictest25494-21timerwakeupswit12:24:171
2874899843,32cyclictest719-21fschecks_time08:59:051
2874899843,32cyclictest16690-21/usr/sbin/munin10:24:031
2874899843,31cyclictest411-21fschecks_time07:19:041
2874899843,28cyclictest28223-21ps12:29:131
28748998361,16cyclictest14051-21sh09:24:361
2874899834,33cyclictest26150-21fschecks_time10:39:011
2874899833,33cyclictest25277-21wc08:34:161
2874899833,33cyclictest25277-21wc08:34:161
2874899833,33cyclictest16623-21grep12:09:191
2874899833,32cyclictest30354-21latency_hist07:13:441
2874899833,31cyclictest343-21runrttasks12:17:301
2874899833,31cyclictest343-21runrttasks12:17:301
2874899833,30cyclictest6798-21/usr/sbin/munin09:14:001
2874899833,30cyclictest21595-21fschecks_time08:24:031
2874899833,30cyclictest21595-21fschecks_time08:24:031
2874899833,30cyclictest17564-21latency_hist11:18:431
2874899833,28cyclictest16815-21sort09:29:211
2874899832,33cyclictest17933-21latency_hist08:13:441
28741998362,13cyclictest28730-21cyclictest08:34:140
28741998362,13cyclictest28730-21cyclictest08:34:140
2874899826,24cyclictest2017-21fschecks_time07:24:041
2874899826,24cyclictest2017-21fschecks_time07:24:041
2874899824,30cyclictest13998-21fschecks_count10:19:041
2874899824,30cyclictest13998-21fschecks_count10:19:041
2874899823,40cyclictest20338-21grep08:19:121
2874899823,32cyclictest6189-21ntp_kernel_pll_10:59:091
2874899823,32cyclictest6189-21ntp_kernel_pll_10:59:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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