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2026-05-16 - 21:41
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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 16, 2026 12:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325249913158,8cyclictest0-21swapper/009:16:190
32544991263,89cyclictest20018-21apt-get09:21:372
325379912171,10cyclictest32515-21cyclictest07:06:441
325249911547,16cyclictest7617-21latency_hist09:01:070
325249911547,16cyclictest7617-21latency_hist09:01:070
325249910384,8cyclictest0-21swapper/011:56:490
197421020,9sleep30-21swapper/308:41:393
197421020,9sleep30-21swapper/308:41:393
325379910179,16cyclictest14834-21fschecks_time10:06:251
325379910179,16cyclictest14834-21fschecks_time10:06:251
316302998,63sleep131039-21/usr/sbin/munin06:56:461
316302998,63sleep131039-21/usr/sbin/munin06:56:461
3237529714,51sleep232391-21apt07:01:032
3237529714,51sleep232391-21apt07:01:032
3254499962,37cyclictest21196-21grep11:11:262
3254499962,37cyclictest21196-21grep11:11:262
32537999480,7cyclictest0-21swapper/112:16:411
3254499933,38cyclictest19063-21fschecks_count12:01:242
32537999373,9cyclictest0-21swapper/108:56:211
32537999373,9cyclictest0-21swapper/108:56:211
3254499922,28cyclictest12957-21grep07:36:412
32524999069,15cyclictest11085-21ntpd09:22:380
3254499893,34cyclictest15111-21ssh11:01:182
3254499893,29cyclictest352-21runrttasks08:55:462
32537998948,7cyclictest181rcu_preempt09:39:231
32537998948,7cyclictest181rcu_preempt09:39:231
3254499883,28cyclictest25892-21latency_hist09:31:062
3254499883,28cyclictest25892-21latency_hist09:31:062
3254499873,38cyclictest7533-21switchtime11:41:382
3254499873,37cyclictest30454-21cstates08:31:552
3254499873,37cyclictest18549-21sh12:01:032
3254499873,31cyclictest16077-21cat07:46:402
3254499873,29cyclictest27845-21ssh09:33:392
32537998771,11cyclictest32515-21cyclictest10:06:061
32537998767,14cyclictest18946-21ssh11:06:401
32537998758,7cyclictest181rcu_preempt07:46:261
32524998760,16cyclictest29815-21apt-key11:26:040
3254499869,43cyclictest27084-21apt-get11:21:202
3254499863,38cyclictest2423-21ssh10:40:202
3254499863,37cyclictest20503-21/usr/sbin/munin10:16:192
3254499863,34cyclictest31979-21/usr/sbin/munin09:41:392
3254499863,30cyclictest30090-21sh09:36:422
3254499863,30cyclictest30090-21sh09:36:422
3254499862,54cyclictest12291-21ssh10:56:262
3254499862,54cyclictest12291-21ssh10:56:262
3254499862,33cyclictest352-21runrttasks09:49:462
3254499862,33cyclictest352-21runrttasks09:49:462
32524998651,27cyclictest0-21swapper/009:11:210
32524998651,27cyclictest0-21swapper/009:11:210
3254499856,66cyclictest7917-21taskset09:01:272
3254499856,11cyclictest0-21swapper/211:53:592
3254499853,38cyclictest31748-21ntp_kernel_pll_12:21:322
3254499853,36cyclictest352-21runrttasks11:08:262
3254499853,33cyclictest352-21runrttasks08:14:052
3254499853,28cyclictest11111-21fschecks_time09:06:262
3254499852,24cyclictest7096-21latency_hist07:21:062
32537998566,14cyclictest32515-21cyclictest10:56:061
32537998566,14cyclictest32515-21cyclictest10:56:061
32524998556,22cyclictest24332-21kworker/u17:2+nfsiod10:10:390
32524998556,22cyclictest24332-21kworker/u17:2+nfsiod10:10:390
3254499843,36cyclictest20469-21ls08:01:302
3254499843,34cyclictest10643-21cat11:46:382
3254499843,29cyclictest352-21runrttasks10:06:362
3254499843,29cyclictest352-21runrttasks10:06:362
3254499842,35cyclictest938-21latency_hist08:41:062
3254499842,26cyclictest9752-21tr10:51:372
3254499842,26cyclictest9752-21tr10:51:372
3254499842,24cyclictest11730-21modprobe07:36:032
32524998465,9cyclictest0-21swapper/008:12:060
32524998463,15cyclictest30726-21fschecks_time11:26:500
3160928428,29sleep00-21swapper/006:56:450
3160928428,29sleep00-21swapper/006:56:450
3254499833,39cyclictest23492-21/usr/sbin/munin10:21:242
3254499833,39cyclictest23492-21/usr/sbin/munin10:21:242
3254499833,30cyclictest352-21runrttasks08:49:342
3254499833,30cyclictest24749-21latency_hist12:11:052
3254499833,30cyclictest24749-21latency_hist12:11:052
3254499833,28cyclictest28538-21cstates08:26:212
3254499833,28cyclictest28538-21cstates08:26:212
3254499833,27cyclictest8979-21fschecks_count07:26:262
3254499833,27cyclictest447-21taskset11:31:032
3254499833,26cyclictest16939-21sh09:16:192
3254499833,21cyclictest2666-21unixbench_multi12:26:402
3254499833,21cyclictest2666-21unixbench_multi12:26:402
32544998329,40cyclictest0-21swapper/210:46:352
32544998327,48cyclictest0-21swapper/209:16:032
32544998327,48cyclictest0-21swapper/209:16:032
3254499832,30cyclictest12488-21timerwakeupswit10:01:392
32537998368,7cyclictest0-21swapper/108:26:021
32537998368,7cyclictest0-21swapper/108:26:021
32537998361,10cyclictest0-21swapper/110:41:161
32524998367,10cyclictest300-21rs:main0
32524998360,8cyclictest181rcu_preempt10:41:060
3254499824,35cyclictest22192-21ntp_kernel_pll_08:06:332
3254499824,35cyclictest22192-21ntp_kernel_pll_08:06:332
3254499823,34cyclictest3527-21ssh10:41:312
3254499823,27cyclictest2597-21latency_hist08:46:062
3254499823,27cyclictest2597-21latency_hist08:46:062
3254499823,25cyclictest19102-21mailstats07:56:382
3254499822,34cyclictest25681-21grep12:11:362
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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