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2026-04-03 - 21:37
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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 Apr 03, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
70459912641,50cyclictest22909-21ssh11:59:070
70459912641,50cyclictest22909-21ssh11:59:070
7054991173,89cyclictest6310-21apt-get09:44:122
7054991173,89cyclictest6310-21apt-get09:44:122
690421119,73sleep06935-21munin-run07:03:560
690421119,73sleep06935-21munin-run07:03:560
70549910719,37cyclictest18990-21seq07:39:112
70549910719,37cyclictest18990-21seq07:39:112
1946221000,20sleep014209-21diskmemload10:59:110
7054999959,34cyclictest18029-21ssh10:03:562
7051999975,18cyclictest10455-21kworker/u19:2-ext4-rsv-conversion12:24:131
705199956,45cyclictest27823-21journal-offline10:19:251
705199956,45cyclictest27823-21journal-offline10:19:251
7051999555,9cyclictest6243-21runrttasks11:30:131
7051999555,9cyclictest6243-21runrttasks11:30:131
7045999567,19cyclictest11459-21latency_hist12:33:570
7045999557,28cyclictest17397-21ssh09:08:590
7045999524,45cyclictest2952-21systemd-journal11:32:000
7045999524,45cyclictest2952-21systemd-journal11:32:000
7045999464,19cyclictest8570-21latency_hist12:28:580
7045999423,29cyclictest19904-21apt-get11:54:060
7051999250,34cyclictest30309-21kworker/u18:3+nfsiod12:23:361
7054999173,10cyclictest2952-21systemd-journal11:08:552
705499904,32cyclictest22280-21latency_hist07:48:582
7054999038,45cyclictest297-21systemd-logind12:23:562
61322907,57sleep16139-21awk06:59:371
61322907,57sleep16139-21awk06:59:371
705499894,31cyclictest27739-21/usr/sbin/munin10:20:202
705499894,31cyclictest27739-21/usr/sbin/munin10:20:202
705499894,29cyclictest352-21runrttasks12:04:092
7054998937,43cyclictest0-21swapper/211:24:322
705499893,30cyclictest1017-21modprobe08:23:562
7054998923,11cyclictest0-21swapper/212:29:112
705499892,29cyclictest13406-21cpuspeed10:49:112
7045998961,19cyclictest9214-21apt-key08:48:580
7045998961,19cyclictest9214-21apt-key08:48:580
705499883,32cyclictest22584-21latency_hist11:58:592
7054998827,10cyclictest0-21swapper/209:39:132
705499882,36cyclictest9545-21fschecks_time07:09:202
705499882,35cyclictest5895-21grep11:29:322
705499882,35cyclictest5895-21grep11:29:322
705499882,34cyclictest21282-21/usr/sbin/munin10:09:212
7054998820,22cyclictest28522-21expr11:14:122
7054998814,27cyclictest30479-21sort09:29:322
705499873,34cyclictest16873-21/usr/sbin/munin11:49:332
705499873,33cyclictest4120-21latency_hist10:33:582
705499873,33cyclictest11045-21find10:44:282
705499873,31cyclictest27984-21rm11:13:502
705499872,33cyclictest19388-21wc10:59:112
705199873,57cyclictest6382-21ssh09:44:191
705199873,57cyclictest6382-21ssh09:44:191
7045998713,51cyclictest2764-21latency_hist09:38:580
705499865,32cyclictest17502-21ssh09:09:062
7054998640,40cyclictest0-21swapper/212:14:172
705499863,35cyclictest31342-21/usr/sbin/munin11:19:122
705499863,35cyclictest14866-21timerwakeupswit11:44:312
705499863,34cyclictest7037-21cyclictest07:04:002
705499863,34cyclictest7037-21cyclictest07:04:002
705499863,32cyclictest9935-21fschecks_time08:49:592
705499862,38cyclictest13764-21unixbench_multi08:59:322
7045998664,15cyclictest7037-21cyclictest12:06:290
7045998657,22cyclictest29076-21df_inode12:09:140
7045998657,22cyclictest29076-21df_inode12:09:140
704599863,56cyclictest6287-21/usr/sbin/munin09:44:280
704599863,56cyclictest6287-21/usr/sbin/munin09:44:280
7045998619,24cyclictest25031-21grep07:54:310
7045998619,24cyclictest25031-21grep07:54:310
7045998610,39cyclictest26462-21latency_hist09:23:590
705499854,31cyclictest27227-21latency_hist08:03:592
705499853,34cyclictest6472-21kernelversion12:25:212
705499853,34cyclictest25533-21latency_hist07:58:582
705499853,34cyclictest25533-21latency_hist07:58:582
705499853,33cyclictest5235-21cat08:34:302
705499853,33cyclictest14397-21fschecks_time07:24:162
705499853,33cyclictest1279-21/usr/sbin/munin08:24:122
705499853,31cyclictest28183-21grep08:04:322
705499853,30cyclictest18762-21kernelversion10:04:232
7054998525,9cyclictest0-21swapper/211:34:322
705499852,33cyclictest17382-21tail10:54:332
705499852,24cyclictest11206-21grep11:39:162
704599859,47cyclictest0-21swapper/007:04:170
7045998550,29cyclictest300-21rs:main0
7045998550,29cyclictest300-21rs:main0
705499844,34cyclictest30551-21cpu08:14:122
705499844,33cyclictest20990-21kernelversion09:14:212
705499844,33cyclictest20990-21kernelversion09:14:212
705499844,32cyclictest12467-21latency_hist07:18:592
705499843,35cyclictest26786-21ssh10:17:452
705499843,35cyclictest11222-21runrttasks09:51:482
705499843,33cyclictest7530-21latency_hist08:43:572
705499843,31cyclictest959-21threads09:34:312
705499843,31cyclictest11431-21fschecks_count08:54:172
705499843,29cyclictest26278-21latency_hist09:23:572
705499843,27cyclictest15934-21tune2fs07:29:172
705499843,27cyclictest15934-21tune2fs07:29:172
7054998432,45cyclictest0-21swapper/210:43:582
7054998432,44cyclictest0-21swapper/210:24:292
705499843,23cyclictest26523-21/usr/sbin/munin09:24:122
705499843,23cyclictest26523-21/usr/sbin/munin09:24:122
7051998446,29cyclictest5672-21kworker/u18:1+nfsiod10:40:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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