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2026-05-23 - 15:04
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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 Sat May 23, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1280521327,17sleep00-21swapper/006:57:410
1280521327,17sleep00-21swapper/006:57:410
12276210715,54sleep212325-21awk06:56:162
12276210715,54sleep212325-21awk06:56:162
1319699973,42cyclictest25125-21ssh11:50:492
1319699973,42cyclictest25125-21ssh11:50:492
1319199943,37cyclictest15593-21/usr/sbin/munin10:41:111
13196999244,42cyclictest8238-21timerwakeupswit08:21:122
13196999244,41cyclictest18699-21latency_hist08:55:392
1319199923,33cyclictest3418-21ssh10:20:371
13200999111,70cyclictest5828-21chrt08:16:023
13191999036,47cyclictest0-21swapper/109:21:021
13187999065,9cyclictest181rcu_preempt08:56:030
13187999065,9cyclictest181rcu_preempt08:56:030
1319199894,43cyclictest8915-21apt-get09:35:481
1319199894,35cyclictest29992-21ntpq09:16:051
1319199892,37cyclictest5862-21unixbench_multi12:11:121
13187998968,15cyclictest18422-21latency_hist07:15:370
13196998859,21cyclictest10941-21switchtime11:26:102
13196998859,21cyclictest10941-21switchtime11:26:102
13196998844,37cyclictest0-21swapper/209:06:122
1319699883,39cyclictest17921-21runrttasks09:50:502
1319199883,34cyclictest27587-21/usr/sbin/munin11:01:071
13191998832,49cyclictest0-21swapper/111:56:131
1319199882,35cyclictest29331-21latency_hist09:15:391
13187998865,17cyclictest8838-21latency_hist08:25:370
13196998739,40cyclictest22585-21switchtime07:26:162
13196998739,40cyclictest22585-21switchtime07:26:162
1319699873,41cyclictest6338-21ssh10:25:362
1319699872,30cyclictest30958-21taskset07:51:292
1319199874,36cyclictest31422-21/usr/sbin/munin12:00:501
1319199874,28cyclictest7504-21timerandwakeup10:26:141
1319199874,28cyclictest7504-21timerandwakeup10:26:141
1319199873,34cyclictest25047-21latency_hist07:35:381
1319199873,34cyclictest25047-21latency_hist07:35:381
1319199873,34cyclictest2219-21latency_hist08:05:381
1319199873,34cyclictest2219-21latency_hist08:05:381
1319199873,34cyclictest18907-21fschecks_count08:55:561
1319199873,34cyclictest18907-21fschecks_count08:55:561
1319199873,33cyclictest3114-21grep08:06:101
1319199873,31cyclictest352-21runrttasks12:27:431
1319199872,33cyclictest31757-21/usr/sbin/munin07:55:581
1319199872,32cyclictest20634-21ssh09:00:581
13191998721,21cyclictest10738-21sh11:26:061
13191998721,21cyclictest10738-21sh11:26:061
1319699869,64cyclictest5808-21apt-get08:16:022
13196998659,17cyclictest544-21cron07:15:392
13196998643,36cyclictest0-21swapper/207:05:352
13196998643,36cyclictest0-21swapper/207:05:352
1319699863,6cyclictest0-21swapper/207:45:502
1319699863,40cyclictest31909-21ssh12:01:032
13196998629,34cyclictest7880-21cat11:21:092
1319199865,53cyclictest9637-21ssh10:30:471
1319199863,34cyclictest25541-21kernelversion11:51:001
1319199863,34cyclictest25541-21kernelversion11:51:001
1319199863,33cyclictest20194-21latency_hist07:20:391
1319199863,29cyclictest13192-21latency_hist07:00:391
1319199863,29cyclictest13192-21latency_hist07:00:391
1319199862,35cyclictest22692-21grep10:51:111
13191998623,23cyclictest13903-21cpu08:40:511
13191998623,23cyclictest13903-21cpu08:40:511
13196998565,13cyclictest2374-21systemd-journal08:30:352
13196998562,13cyclictest21343-21kworker/u17:3-xprtiod11:45:352
1319699853,8cyclictest0-21swapper/210:00:512
13196998538,37cyclictest0-21swapper/207:25:392
1319699853,33cyclictest22645-21nfs4_client11:46:032
1319699852,38cyclictest5261-21/usr/sbin/munin12:11:002
1319199853,35cyclictest4719-21ntp_kernel_pll_11:16:031
1319199853,34cyclictest12072-21df09:40:541
1319199852,31cyclictest21144-21fschecks_count09:55:571
1319199852,31cyclictest21144-21fschecks_count09:55:571
1319199852,31cyclictest18597-21latency_hist08:55:381
13187998557,20cyclictest30365-21latency_hist11:05:370
13187998547,11cyclictest181rcu_preempt09:01:150
13196998461,16cyclictest13175-21cyclictest09:22:402
1319699844,37cyclictest12818-21/usr/sbin/munin08:36:072
13196998441,35cyclictest0-21swapper/210:56:102
1319699843,33cyclictest17241-21sort07:10:582
1319699842,28cyclictest4272-21/usr/sbin/munin11:15:522
1319199843,36cyclictest28930-21find07:46:091
1319199843,35cyclictest15303-21fschecks_count07:05:451
13191998433,43cyclictest0-21swapper/111:35:511
1319199843,33cyclictest31477-21latency_hist07:55:381
1319199843,33cyclictest25379-21fschecks_time07:35:591
1319199842,56cyclictest27170-21sh10:06:001
1319199842,33cyclictest18626-21awk09:51:101
1319199842,32cyclictest22823-21unixbench_singl07:26:191
1319199842,32cyclictest22823-21unixbench_singl07:26:191
13191998410,26cyclictest15477-21sort10:40:381
13187998459,16cyclictest803-21sendmail-mta07:19:050
1318799844,60cyclictest15165-21fschecks_time09:45:580
1318799844,60cyclictest15165-21fschecks_time09:45:580
13196998341,36cyclictest20081-21diskmemload09:41:142
1319699833,6cyclictest0-21swapper/211:30:502
1319699833,39cyclictest30600-21sh11:05:472
1319699833,37cyclictest10026-21awk10:30:592
1319699833,32cyclictest25415-21/usr/sbin/munin07:36:002
1319699833,30cyclictest28300-21/usr/sbin/munin11:56:442
1319699832,7cyclictest0-21swapper/208:10:452
1319699832,7cyclictest0-21swapper/208:10:452
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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