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2026-03-09 - 18:35
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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 Mon Mar 09, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165389913462,64cyclictest19249-21latency_hist10:45:390
165389911759,52cyclictest277-21dbus-daemon08:35:370
165389911429,26cyclictest0-21swapper/009:10:380
165389911139,9cyclictest0-21swapper/012:25:380
165389911134,20cyclictest25050-21modprobe07:30:350
16267211014,69sleep216278-21munin-run07:05:362
16538991083,36cyclictest5763-21/usr/sbin/munin08:11:120
16538991073,50cyclictest352-21runrttasks10:53:390
165389910714,27cyclictest30902-21taskset07:46:090
165389910641,14cyclictest4851-21mailstats08:06:100
16538991053,46cyclictest352-21runrttasks09:38:030
1618921056,78sleep00-21swapper/007:04:450
16538991043,41cyclictest11879-21fschecks_time11:26:380
16538991042,41cyclictest18394-21switchtime11:36:120
16538991042,41cyclictest18394-21switchtime11:36:120
2024121030,5sleep10-21swapper/112:33:511
16538991033,34cyclictest11276-21apt-config11:25:400
16538991012,42cyclictest32694-21/usr/sbin/munin12:00:550
38482980,8sleep13851-21kernelversion09:26:011
16538999840,10cyclictest0-21swapper/009:00:350
16560999763,28cyclictest10033-21ntp_kernel_pll_09:36:042
16560999553,36cyclictest23540-21diskmemload10:20:512
16538999539,19cyclictest2105-21kworker/u17:2+nfsiod11:12:580
16560999441,45cyclictest23540-21diskmemload10:35:582
16560999433,52cyclictest0-21swapper/211:26:102
16551999463,22cyclictest14124-21apt-key11:30:381
1625129412,57sleep116266-21modprobe07:05:351
16560999217,30cyclictest30512-21sh10:10:472
16560999217,30cyclictest30512-21sh10:10:472
16551999170,14cyclictest22328-21/usr/sbin/munin10:51:031
16538999171,14cyclictest1893-21sh11:10:380
16538999171,14cyclictest1893-21sh11:10:380
1656099903,43cyclictest3157-21unin-run09:25:372
1656099903,43cyclictest3157-21unin-run09:25:372
1653899903,27cyclictest352-21runrttasks08:54:010
16560998935,47cyclictest0-21swapper/211:45:512
1656099893,36cyclictest20321-21awk08:55:352
16560998920,27cyclictest1-21systemd08:20:372
1656099883,44cyclictest7071-21/usr/sbin/munin10:25:452
1656099883,44cyclictest7071-21/usr/sbin/munin10:25:452
1656099873,42cyclictest11663-21latency_hist12:20:392
1656099873,28cyclictest24543-21timerwakeupswit07:26:102
1656099864,41cyclictest8526-21fschecks_time11:20:592
1656099864,33cyclictest6060-21tune2fs08:10:592
1656099864,32cyclictest22517-21if_eth009:00:592
1656099864,32cyclictest22517-21if_eth009:00:592
16560998634,42cyclictest0-21swapper/211:01:092
1656099863,30cyclictest18653-21tune2fs07:10:442
1656099863,30cyclictest18653-21tune2fs07:10:442
1656099863,29cyclictest25400-21latency_hist10:55:392
1656099854,31cyclictest31614-21/usr/sbin/munin11:06:052
1656099854,31cyclictest31614-21/usr/sbin/munin11:06:052
1656099853,33cyclictest5966-21mailstats11:16:092
1656099853,29cyclictest18169-21latency_hist07:10:382
1656099852,31cyclictest12484-21ssh09:40:512
16560998518,22cyclictest21924-21latency_hist09:00:352
16560998510,33cyclictest16966-21seq12:28:032
16560998510,33cyclictest16966-21seq12:28:032
1656099844,37cyclictest2930-21kernelversion08:00:592
1656099844,37cyclictest2930-21kernelversion08:00:592
16560998441,36cyclictest0-21swapper/209:06:142
1656099843,37cyclictest21889-21latency_hist07:20:372
1656099843,37cyclictest21889-21latency_hist07:20:372
1656099843,32cyclictest1542-21kernelversion10:16:012
1656099843,32cyclictest12622-21grep12:21:482
1656099843,28cyclictest298-21in:imuxsock08:40:362
1656099843,28cyclictest298-21in:imuxsock08:40:362
1656099843,27cyclictest18395-21/usr/sbin/munin12:30:562
1656099843,26cyclictest13590-21munin-run08:35:362
16560998432,45cyclictest0-21swapper/212:00:582
16560998429,47cyclictest0-21swapper/211:10:492
1656099842,30cyclictest27819-21sed09:11:112
1656099842,30cyclictest27819-21sed09:11:112
1656099842,30cyclictest1164-21fschecks_count07:55:592
1656099842,30cyclictest1164-21fschecks_count07:55:592
1656099834,37cyclictest27443-21ntp_kernel_err07:36:042
1656099833,37cyclictest9326-21latency_hist09:35:392
1656099833,30cyclictest29999-21cpuspeed09:15:522
1656099833,30cyclictest24727-21fschecks_count10:00:572
1656099833,29cyclictest6117-21latency_hist09:30:382
1656099833,28cyclictest27773-21fschecks_count10:05:582
1656099833,27cyclictest20497-21/usr/sbin/munin11:41:072
1656099832,28cyclictest23440-21modprobe07:25:352
16560998317,24cyclictest15081-21fschecks_time11:31:472
1656099824,36cyclictest352-21runrttasks11:58:022
1656099824,36cyclictest352-21runrttasks11:58:022
1656099824,23cyclictest5970-21/usr/sbin/munin12:11:132
16560998236,40cyclictest0-21swapper/210:46:062
1656099823,31cyclictest3470-21cat12:06:002
1656099823,31cyclictest12139-21ssh10:33:502
1656099823,26cyclictest11475-21timerwakeupswit08:26:082
1656099823,25cyclictest18145-21/usr/sbin/munin11:36:062
1656099823,25cyclictest18145-21/usr/sbin/munin11:36:062
1656099823,24cyclictest25615-21apt-get10:55:492
16560998229,45cyclictest0-21swapper/208:50:362
16560998229,45cyclictest0-21swapper/208:50:362
16560998225,50cyclictest0-21swapper/210:44:572
1656099822,36cyclictest15701-21/usr/sbin/munin08:41:032
1656099822,36cyclictest15701-21/usr/sbin/munin08:41:032
1656099822,33cyclictest26260-21unixbench_singl07:31:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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