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2025-08-27 - 14:29
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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 Wed Aug 27, 2025 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1288821256,16sleep00-21swapper/019:01:080
13270999845,47cyclictest0-21swapper/223:13:192
13270999845,47cyclictest0-21swapper/223:13:192
1327099983,48cyclictest13589-21apt-get19:03:552
13266999883,9cyclictest0-21swapper/119:53:231
13263999872,20cyclictest14166-21latency_hist20:42:520
13266999635,53cyclictest14933-21idleruntime-cro19:07:511
13263999524,40cyclictest15-21ksoftirqd/019:49:250
13270999349,36cyclictest4982-21sh23:23:032
13270999349,36cyclictest4982-21sh23:23:032
1327099934,39cyclictest27438-21cat22:08:292
13270999343,42cyclictest0-21swapper/200:18:212
13270999343,42cyclictest0-21swapper/200:18:212
13266999370,16cyclictest0-21swapper/120:07:531
13266999370,16cyclictest0-21swapper/120:07:531
13266999369,17cyclictest26272-21switchtime19:38:271
1326699933,28cyclictest23790-21latency_hist21:07:531
1326699933,28cyclictest23790-21latency_hist21:07:531
13263999364,22cyclictest25505-21latency_hist19:37:540
13263999330,50cyclictest26603-21modprobe21:12:500
13270999269,17cyclictest23499-21latency_hist22:02:572
13266999232,52cyclictest0-21swapper/100:08:341
13266999232,52cyclictest0-21swapper/100:08:341
13270999149,36cyclictest25553-21sh21:09:462
13270999143,40cyclictest0-21swapper/221:13:202
13266999152,33cyclictest25896-21cpuspeed23:03:121
13266999134,50cyclictest0-21swapper/123:17:501
13266999134,50cyclictest0-21swapper/123:17:501
13263999166,16cyclictest17446-21apt-key20:52:530
13263999127,44cyclictest15-21ksoftirqd/023:08:520
13270999047,37cyclictest0-21swapper/223:10:012
13266999039,45cyclictest0-21swapper/121:13:291
1204829025,31sleep10-21swapper/118:58:241
13266998931,50cyclictest0-21swapper/123:48:131
13263998949,18cyclictest181rcu_preempt22:18:470
1326399893,64cyclictest17849-21dpkg20:53:140
13270998844,38cyclictest0-21swapper/222:13:202
13270998837,43cyclictest26267-21switchtime19:38:272
1327099882,32cyclictest9240-21fschecks_count21:38:142
1327099882,32cyclictest9240-21fschecks_count21:38:142
13266998837,44cyclictest0-21swapper/123:32:511
173602870,9sleep30-21swapper/322:48:123
1327099873,31cyclictest15736-21fschecks_count19:08:062
13266998763,15cyclictest9562-21cpuspeed20:28:131
13266998763,15cyclictest9562-21cpuspeed20:28:131
1326699872,28cyclictest27341-21sed22:08:271
13263998760,18cyclictest20795-21diskmemload22:48:080
13263998738,8cyclictest181rcu_preempt22:01:360
127152876,60sleep20-21swapper/218:58:542
13270998645,33cyclictest0-21swapper/200:23:292
13270998642,36cyclictest17210-21sh19:12:542
13270998640,39cyclictest0-21swapper/222:57:262
1327099863,40cyclictest9667-21users00:28:292
1327099863,37cyclictest17914-21run-parts20:53:572
1327099863,33cyclictest718-21/usr/sbin/munin21:23:152
1327099863,32cyclictest30927-21grep19:54:222
1326699864,33cyclictest8822-21sh21:37:531
13266998641,38cyclictest0-21swapper/121:08:321
13266998638,41cyclictest0-21swapper/121:38:211
13266998638,41cyclictest0-21swapper/121:38:211
1326699863,27cyclictest22922-21sh22:58:041
13263998633,33cyclictest4677-21idleruntime-cro23:22:500
13263998633,33cyclictest4677-21idleruntime-cro23:22:500
13270998560,15cyclictest0-21swapper/222:22:532
13270998546,32cyclictest0-21swapper/223:03:222
1327099853,7cyclictest0-21swapper/219:58:092
1327099853,7cyclictest0-21swapper/219:58:092
1327099853,33cyclictest2970-21fschecks_count22:23:162
1327099852,30cyclictest32437-21modprobe21:22:502
1327099852,30cyclictest32437-21modprobe21:22:502
1327099852,29cyclictest6284-21cpu20:18:082
1326699854,29cyclictest3210-21/usr/sbin/munin21:28:211
1326699853,27cyclictest16154-21switchtime21:49:291
1326699853,26cyclictest24663-21cat19:33:261
1326699852,31cyclictest9645-21ssh00:28:281
13266998519,10cyclictest0-21swapper/122:37:511
13270998466,12cyclictest17339-21sendmail-msp20:52:512
13270998466,12cyclictest14485-21apt-key21:47:512
1327099843,7cyclictest0-21swapper/223:38:072
1327099843,31cyclictest356-21runrttasks21:54:122
1327099843,31cyclictest356-21runrttasks21:54:122
1327099843,31cyclictest356-21runrttasks19:51:022
1327099843,30cyclictest356-21runrttasks22:36:322
1327099842,34cyclictest30408-21/usr/sbin/munin00:08:132
1327099842,34cyclictest30408-21/usr/sbin/munin00:08:132
1326699844,40cyclictest31973-21latency_hist22:17:541
1326699843,32cyclictest16172-21fschecks_count20:48:121
1326699843,30cyclictest23293-21grep19:28:301
1326699843,30cyclictest23293-21grep19:28:301
1326699843,30cyclictest21740-21timerwakeupswit21:58:291
1326699843,29cyclictest17068-21sh23:43:211
1326699843,29cyclictest17068-21sh23:43:211
13266998430,42cyclictest0-21swapper/122:52:231
13266998429,47cyclictest0-21swapper/121:47:511
1326699842,44cyclictest10821-21apt-get23:33:061
1326699842,30cyclictest21020-21cat21:02:551
13263998446,12cyclictest181rcu_preempt21:19:580
13263998446,12cyclictest181rcu_preempt21:19:580
1327099833,35cyclictest8650-21wc20:23:262
1327099833,34cyclictest5185-21/usr/sbin/munin20:13:212
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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