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2025-12-12 - 04:55
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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 Fri Dec 12, 2025 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21715212010,88sleep00-21swapper/019:03:290
230319911649,22cyclictest23008-21cyclictest23:04:102
230319911649,22cyclictest23008-21cyclictest23:04:102
2264221066,16sleep20-21swapper/219:04:582
230199910342,12cyclictest0-21swapper/122:14:291
230199910238,19cyclictest31677-21modprobe19:33:041
230199910216,34cyclictest26403-21date23:53:071
230199910216,34cyclictest26403-21date23:53:071
230199910172,20cyclictest9344-21latency_hist20:03:081
230199910133,18cyclictest0-21swapper/123:58:311
23019999939,12cyclictest0-21swapper/100:18:071
23019999935,15cyclictest0-21swapper/123:03:081
23015999929,31cyclictest0-21swapper/023:23:200
23019999735,12cyclictest0-21swapper/121:09:051
23019999637,12cyclictest0-21swapper/121:18:181
23015999630,29cyclictest0-21swapper/023:13:180
2301999953,41cyclictest11599-21fschecks_count20:09:431
23015999421,35cyclictest0-21swapper/000:28:190
2301999933,37cyclictest12269-21idleruntime-cro21:33:031
2301999933,37cyclictest12269-21idleruntime-cro21:33:031
23019999320,31cyclictest28205-21switchtime20:58:411
2301999924,34cyclictest29574-21ntp_kernel_err21:03:371
2301999924,34cyclictest29574-21ntp_kernel_err21:03:371
23015999224,32cyclictest6192-21wc00:13:420
23019999141,12cyclictest14256-21latency_hist20:18:081
23015999149,33cyclictest20961-21ssh23:43:200
23015999118,36cyclictest4006-21kworker/u17:1+events_unbound20:58:040
23031999044,10cyclictest181rcu_preempt20:13:202
23015999021,29cyclictest20122-21grep22:43:370
23015999021,29cyclictest20122-21grep22:43:370
23015999014,44cyclictest31144-21rm22:06:210
2303199899,62cyclictest2725-21ssh22:13:412
23019998966,17cyclictest19318-21latency_hist22:43:081
23019998949,15cyclictest20234-21ssh22:43:381
23019998949,15cyclictest20234-21ssh22:43:381
23015998915,30cyclictest0-21swapper/019:33:220
23015998847,32cyclictest30425-21diskmemload00:25:220
23015998847,32cyclictest30425-21diskmemload00:25:220
23019998762,18cyclictest23471-21timerwakeupswit20:43:431
23015998716,36cyclictest2039-21apt-get22:13:100
23015998666,12cyclictest30571-21apt-key23:03:060
23015998622,27cyclictest20742-21latency_hist23:43:060
23015998620,47cyclictest7350-21fschecks_time21:23:280
2303199857,55cyclictest28735-21apt-get19:23:352
23019998549,25cyclictest30326-21grep22:03:461
2301999852,47cyclictest30932-21apt-get23:03:211
2301999852,47cyclictest30932-21apt-get23:03:211
2301599854,58cyclictest11294-21apt-get20:08:190
23015998527,28cyclictest0-21swapper/020:18:420
23015998524,29cyclictest0-21swapper/020:28:050
23015998524,29cyclictest0-21swapper/020:28:050
23015998522,31cyclictest27067-21fschecks_count19:18:280
23015998522,28cyclictest9778-21sh22:25:320
23015998516,29cyclictest29285-21cat23:58:070
23015998514,20cyclictest0-21swapper/023:03:160
23015998514,20cyclictest0-21swapper/023:03:160
23031998458,18cyclictest18421-21fschecks_time23:38:252
23019998453,23cyclictest16361-21latency_hist00:33:061
23019998451,8cyclictest181rcu_preempt23:13:211
23015998461,15cyclictest207-21systemd-journal22:50:320
23015998418,25cyclictest14806-21ssh22:33:430
23015998417,31cyclictest30018-21/usr/sbin/munin23:58:340
23031998357,17cyclictest30425-21diskmemload21:38:432
23015998336,34cyclictest18881-21/usr/sbin/munin21:43:390
23015998336,34cyclictest18881-21/usr/sbin/munin21:43:390
23015998323,33cyclictest1810-21ssh23:08:340
23015998310,49cyclictest207-21systemd-journal00:19:320
23031998262,15cyclictest23008-21cyclictest21:20:512
23031998245,9cyclictest181rcu_preempt22:03:242
23031998245,11cyclictest15090-21latency_hist23:33:052
23019998255,18cyclictest2460-21latency_hist00:08:061
23019998254,20cyclictest31045-21kworker/u17:3+events_unbound21:15:041
2301599826,29cyclictest0-21swapper/022:33:070
2301599826,29cyclictest0-21swapper/022:33:070
2301599823,56cyclictest30979-21apt-get21:08:230
23015998226,21cyclictest30484-21dpkg21:08:050
23015998226,21cyclictest30484-21dpkg21:08:050
23015998217,31cyclictest26386-21latency_hist23:53:060
23015998217,31cyclictest26386-21latency_hist23:53:060
23031998164,10cyclictest15426-21cpuspeed23:33:212
23031998151,21cyclictest25898-21ls20:53:212
2301599818,31cyclictest0-21swapper/021:18:330
23015998157,15cyclictest10794-21latency_hist20:08:060
23015998121,23cyclictest20289-21grep20:33:440
23015998120,42cyclictest0-21swapper/019:58:400
23015998120,24cyclictest17500-21ssh21:42:020
23015998118,23cyclictest32479-21ssh22:08:300
23015998117,26cyclictest25012-21wc19:13:120
23015998117,26cyclictest25012-21wc19:13:120
23015998113,31cyclictest17917-21cat23:38:060
23015998113,29cyclictest25762-21processes22:53:390
23015998113,29cyclictest25762-21processes22:53:390
23015998111,33cyclictest4097-21latency_hist21:18:080
2301599809,38cyclictest0-21swapper/020:28:210
2301599809,38cyclictest0-21swapper/020:28:210
23015998016,23cyclictest0-21swapper/021:33:200
23015998015,39cyclictest9820-21apt21:28:160
23015998015,39cyclictest9820-21apt21:28:160
23015998011,27cyclictest0-21swapper/022:18:320
23031997963,11cyclictest23008-21cyclictest21:09:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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