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2026-05-14 - 10:39
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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 May 14, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139559911358,11cyclictest12504-21kworker/u17:2+xprtiod21:46:450
139559911349,19cyclictest13942-21cyclictest00:21:390
139559911349,19cyclictest13942-21cyclictest00:21:390
1378921066,16sleep10-21swapper/119:01:061
12933210432,36sleep20-21swapper/218:56:472
139649910210,67cyclictest7055-21apt-get00:11:301
13964991009,67cyclictest20441-21apt-get22:46:291
13964999730,27cyclictest0-21swapper/121:51:481
1397399952,34cyclictest15297-21fschecks_count20:41:332
13973999337,49cyclictest2374-21systemd-journal20:56:132
1397399933,33cyclictest352-21runrttasks23:56:352
13973999325,11cyclictest0-21swapper/223:30:222
13973999325,11cyclictest0-21swapper/223:30:222
1396499933,67cyclictest30274-21apt-get23:56:401
1397399925,17cyclictest143792cat20:36:502
13955999246,36cyclictest14913-21timerandwakeup19:01:480
1397399913,33cyclictest1199-21grep23:06:502
1397399913,32cyclictest1418-21ntp_kernel_pll_00:01:412
1397399913,22cyclictest22784-21/usr/sbin/munin21:01:512
1397399913,22cyclictest22784-21/usr/sbin/munin21:01:512
13964999140,26cyclictest22381-21sh23:42:251
13964999140,26cyclictest22381-21sh23:42:251
13973999037,45cyclictest0-21swapper/222:47:052
1397399903,31cyclictest6180-21ssh23:16:242
1397399903,31cyclictest6180-21ssh23:16:242
1397399902,36cyclictest18365-21fschecks_count23:36:362
13964999069,11cyclictest15880-21latency_hist00:26:161
13964999069,11cyclictest15880-21latency_hist00:26:161
13955999072,12cyclictest15190-21timerwakeupswit22:36:490
13973998946,37cyclictest14762-21mailstats19:01:462
1397399894,36cyclictest16822-21ssh21:46:242
1397399894,35cyclictest18139-21dpkg20:51:142
13973998940,42cyclictest0-21swapper/222:36:382
1397399893,35cyclictest22568-21latency_hist19:26:162
1397399893,35cyclictest22568-21latency_hist19:26:162
1397399893,35cyclictest10730-21cat21:36:302
1397399893,35cyclictest10730-21cat21:36:302
1397399893,34cyclictest31887-21sh23:05:032
1397399893,33cyclictest23561-21ls22:51:302
1397399893,32cyclictest9701-21cron00:16:122
137312896,65sleep00-21swapper/019:00:200
13973998859,21cyclictest23754-21kworker/u17:1-ext4-rsv-conversion00:11:172
1397399883,37cyclictest27040-21sort23:51:222
1397399883,34cyclictest25970-21users21:06:532
1397399883,34cyclictest1311-21latency_hist21:21:162
1397399883,33cyclictest19345-21latency_hist19:16:162
1397399883,28cyclictest26406-21/usr/sbin/munin22:56:492
1397399882,38cyclictest14336-21ssh21:42:292
1397399882,38cyclictest14336-21ssh21:42:292
1397399876,35cyclictest10003-21sshd00:16:202
1397399874,33cyclictest25924-21latency_hist19:36:152
1397399874,33cyclictest25924-21latency_hist19:36:152
1397399874,32cyclictest352-21runrttasks22:08:162
13973998735,44cyclictest0-21swapper/222:41:332
1397399873,34cyclictest8119-21latency_hist22:26:162
1397399873,33cyclictest15958-21switchtime23:31:472
13973998729,50cyclictest0-21swapper/221:51:482
1397399872,36cyclictest8654-21tune2fs20:21:332
1397399872,36cyclictest8654-21tune2fs20:21:332
1397399872,34cyclictest31232-21grep19:51:362
13955998765,16cyclictest6636-21apt-key00:11:150
1397399864,33cyclictest352-21runrttasks23:49:202
1397399864,33cyclictest352-21runrttasks23:49:202
1397399864,33cyclictest23820-21unixbench_multi19:27:082
1397399864,33cyclictest23820-21unixbench_multi19:27:082
1397399864,32cyclictest19698-21fschecks_time19:16:352
1397399864,31cyclictest10925-21grep20:26:492
1397399864,31cyclictest10925-21grep20:26:492
1397399863,35cyclictest12993-21/usr/sbin/munin00:21:492
1397399863,35cyclictest12993-21/usr/sbin/munin00:21:492
1397399863,34cyclictest352-21runrttasks20:59:492
1397399863,32cyclictest16232-21grep00:26:342
1397399863,31cyclictest4587-21/usr/sbin/munin21:26:482
1397399863,30cyclictest4916-21latency_hist20:11:162
13973998632,46cyclictest0-21swapper/221:16:172
13973998632,46cyclictest0-21swapper/221:16:172
1397399862,39cyclictest11013-21ssh22:31:152
1397399862,39cyclictest11013-21ssh22:31:152
13964998659,20cyclictest528-21kworker/u17:3+events_unbound19:06:131
1397399853,35cyclictest3409-21grep23:11:352
1397399853,35cyclictest12403-21ssh22:31:562
1397399853,34cyclictest29251-21latency_hist19:46:162
1397399853,33cyclictest17098-21grep19:06:512
1397399853,33cyclictest17098-21grep19:06:512
1397399853,32cyclictest13308-21latency_hist20:36:162
1397399853,31cyclictest2905-21grep20:01:492
13973998523,28cyclictest25650-21cat22:01:162
13964998526,23cyclictest17262-21seq19:08:091
13964998526,23cyclictest17262-21seq19:08:091
1397399844,34cyclictest5187-21/usr/sbin/munin20:11:382
1397399843,34cyclictest10367-21latency_hist21:36:152
1397399843,33cyclictest1608-21/usr/sbin/munin21:21:482
1397399843,31cyclictest9111-21/usr/sbin/munin23:21:372
13973998419,14cyclictest0-21swapper/222:16:352
13964998462,16cyclictest13408-21latency_hist21:41:161
13964998462,16cyclictest13408-21latency_hist21:41:161
13964998461,16cyclictest544-21cron21:01:131
13964998461,16cyclictest13942-21cyclictest00:26:491
1397399837,26cyclictest1784-21sh22:15:402
1397399837,26cyclictest1784-21sh22:15:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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