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2026-06-01 - 12:28
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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 Jun 01, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30948212512,76sleep130952-21ls19:00:041
30227211564,31sleep20-21swapper/218:55:452
31015991133,71cyclictest4931-21kworker/u19:0+ext4-rsv-conversion22:10:341
31015991006,72cyclictest2145-21rm22:41:061
31015991006,72cyclictest2145-21rm22:41:061
1045221000,6sleep110451-21open_files22:00:331
1045221000,6sleep110451-21open_files22:00:331
3101199993,70cyclictest25366-21kworker/u19:2+ext4-rsv-conversion23:35:240
3101199993,70cyclictest25366-21kworker/u19:2+ext4-rsv-conversion23:35:240
3101199988,44cyclictest15-21ksoftirqd/019:00:150
31015999618,66cyclictest1807-21apt-get23:35:241
31015999618,66cyclictest1807-21apt-get23:35:241
3101199952,64cyclictest1819-21apt-get22:41:060
3101199952,64cyclictest1819-21apt-get22:41:060
31019999432,52cyclictest0-21swapper/223:25:372
31011999216,52cyclictest15-21ksoftirqd/020:17:210
31011999216,52cyclictest15-21ksoftirqd/020:17:210
31019999163,22cyclictest2456-21sendmail20:50:002
3101999914,39cyclictest8994-21grep19:30:032
3101199914,49cyclictest15-21ksoftirqd/023:10:150
3101199913,27cyclictest7121-21fschecks_time21:55:230
3101999904,40cyclictest6980-21latency_hist19:25:032
3101999904,39cyclictest12483-21rm23:50:592
31019998967,16cyclictest544-21cron21:54:592
3101999894,40cyclictest8864-21ntp_kernel_pll_23:45:292
3101999894,36cyclictest12236-21/usr/sbin/munin21:11:172
3101999893,31cyclictest15926-21ssh23:03:412
3101199893,34cyclictest15-21ksoftirqd/021:46:220
3101999884,38cyclictest11098-21fschecks_time22:55:222
3101999883,41cyclictest9448-21seq22:52:042
3101999883,41cyclictest9448-21seq22:52:042
3101999883,41cyclictest28295-21latency_hist23:25:022
31019998766,13cyclictest0-21swapper/222:30:272
31019998766,13cyclictest0-21swapper/222:30:272
3101999874,40cyclictest26866-21latency_hist20:25:022
3101999874,40cyclictest26866-21latency_hist20:25:022
3101999874,38cyclictest7520-21awk22:50:002
31019998734,45cyclictest0-21swapper/221:18:032
3101999873,42cyclictest10920-21fschecks_count19:35:232
3101999873,41cyclictest22974-21fschecks_time23:15:232
3101999873,41cyclictest22974-21fschecks_time23:15:232
3101999873,38cyclictest352-21runrttasks22:21:352
3101999873,36cyclictest14436-21fschecks_count19:46:262
3101999873,33cyclictest32211-21tune2fs20:40:242
3101999873,31cyclictest9213-21ssh21:05:222
3101999873,30cyclictest15401-21runrttasks23:58:292
31019998730,49cyclictest0-21swapper/222:11:322
3101999872,30cyclictest1579-21latency_hist22:40:032
3101999872,30cyclictest1579-21latency_hist22:40:032
31019998710,33cyclictest20575-21cut20:05:042
3101199876,46cyclictest15-21ksoftirqd/019:17:520
3101199872,52cyclictest15-21ksoftirqd/022:37:480
3101199872,52cyclictest15-21ksoftirqd/022:37:480
3101999864,41cyclictest352-21runrttasks21:02:332
3101999864,41cyclictest352-21runrttasks21:02:332
3101999864,41cyclictest23001-21ps00:10:352
3101999864,36cyclictest352-21runrttasks23:07:192
3101999864,32cyclictest30187-21latency_hist21:40:042
3101999864,30cyclictest21259-21taskset21:25:122
3101999863,40cyclictest3291-21runrttasks23:36:232
3101999863,40cyclictest3291-21runrttasks23:36:232
3101999863,38cyclictest28400-21latency_hist00:20:032
3101999863,37cyclictest5967-21open_inodes23:40:332
3101999863,36cyclictest19849-21cstates23:10:172
3101999862,28cyclictest6794-21/usr/sbin/munin21:55:292
31011998664,15cyclictest15915-21latency_hist22:10:040
3101199863,55cyclictest15-21ksoftirqd/021:40:560
3101199862,45cyclictest15-21ksoftirqd/022:02:280
3101199862,45cyclictest15-21ksoftirqd/022:02:280
3101999854,40cyclictest14037-21latency_hist19:45:042
3101999853,66cyclictest1260-21apt-get22:40:142
3101999853,66cyclictest1260-21apt-get22:40:142
3101999853,40cyclictest853-21cpuspeed19:05:192
3101999853,27cyclictest5695-21ssh21:00:002
3101999853,26cyclictest30221-21/usr/sbin/munin21:40:272
3101999853,25cyclictest30036-21cron20:35:002
3101999852,30cyclictest31576-21cpuspeed00:25:172
31015998563,16cyclictest28448-21sendmail20:30:001
31011998563,9cyclictest181rcu_preempt23:25:450
3101199853,55cyclictest16265-21sh22:10:460
3101199853,53cyclictest15-21ksoftirqd/000:27:230
3101999844,38cyclictest352-21runrttasks00:07:372
3101999844,30cyclictest4185-21latency_hist20:55:022
31019998434,43cyclictest0-21swapper/219:55:402
3101999843,39cyclictest32434-21switchtime23:30:362
3101999843,32cyclictest2651-21grep19:10:232
3101999843,31cyclictest13469-21grep22:05:322
3101999843,31cyclictest12621-21latency_hist22:05:032
3101999843,31cyclictest12621-21latency_hist22:05:032
3101999843,30cyclictest15771-21/usr/sbin/munin19:50:242
3101999843,28cyclictest28486-21/usr/sbin/munin00:20:322
3101999843,20cyclictest28002-21unixbench_multi20:25:362
3101999842,29cyclictest31460-21grep19:00:202
31015998458,16cyclictest1-21systemd21:10:011
3101199846,46cyclictest15-21ksoftirqd/022:31:000
3101199846,46cyclictest15-21ksoftirqd/022:31:000
3101199843,35cyclictest15-21ksoftirqd/022:19:290
3101199842,52cyclictest15-21ksoftirqd/019:08:080
31011998417,40cyclictest15-21ksoftirqd/023:50:260
31011998413,47cyclictest15-21ksoftirqd/023:05:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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