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2026-03-19 - 22:14
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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 Thu Mar 19, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30148213667,36sleep10-21swapper/107:00:151
30148213667,36sleep10-21swapper/107:00:151
31573991153,78cyclictest607-21apt-get12:30:092
3138921157,16sleep00-21swapper/007:04:380
3138921157,16sleep00-21swapper/007:04:380
30382211210,73sleep230429-21/usr/sbin/munin07:00:242
30382211210,73sleep230429-21/usr/sbin/munin07:00:242
31571991113,98cyclictest3122-21apt-get11:40:091
31571991046,74cyclictest1619-21apt-get09:50:111
31571991046,74cyclictest1619-21apt-get09:50:111
30953210218,49sleep30-21swapper/307:00:423
30953210218,49sleep30-21swapper/307:00:423
31571991003,51cyclictest29332-21ssh11:30:081
31571999651,37cyclictest0-21swapper/112:25:101
31571999651,37cyclictest0-21swapper/112:25:101
31571999551,38cyclictest8010-21sh09:05:491
31571999550,38cyclictest0-21swapper/111:24:551
31571999550,38cyclictest0-21swapper/111:24:551
78742940,7sleep00-21swapper/011:46:420
78742940,7sleep00-21swapper/011:46:420
3157199934,36cyclictest352-21runrttasks08:04:561
3157199934,36cyclictest352-21runrttasks08:04:561
3157199929,68cyclictest6397-21ssh11:45:141
3157199929,68cyclictest6397-21ssh11:45:141
31571999113,68cyclictest1886-21apt-get08:50:181
3157199893,39cyclictest21210-21ssh12:09:581
3157199893,32cyclictest352-21runrttasks10:06:551
3157199893,30cyclictest352-21runrttasks10:35:501
3157199892,29cyclictest17464-21ssh10:15:291
31566998963,17cyclictest277-21dbus-daemon09:49:560
31566998944,29cyclictest607-21apt-get12:30:160
31573998860,11cyclictest181rcu_preempt09:10:102
31571998869,13cyclictest365-21ntpd12:18:061
3157199885,39cyclictest12640-21unin-run07:44:561
3157199885,39cyclictest12640-21unin-run07:44:561
3157199882,40cyclictest22644-21/usr/sbin/munin10:25:281
3157199882,40cyclictest22644-21/usr/sbin/munin10:25:281
3157199882,31cyclictest23063-21latency_hist11:19:571
31566998863,17cyclictest2393-21sh09:50:460
31566998863,17cyclictest2393-21sh09:50:460
3157399876,64cyclictest2571-21apt-get11:40:092
3157199874,39cyclictest7478-21latency_hist09:59:581
3157199874,32cyclictest22324-21cat12:10:301
31571998742,37cyclictest0-21swapper/110:10:271
31571998742,36cyclictest0-21swapper/109:46:031
3157199873,41cyclictest12058-21readlink11:54:551
3157199873,40cyclictest24674-21fschecks_time08:20:171
3157199873,40cyclictest24674-21fschecks_time08:20:171
3157199872,66cyclictest28349-21kworker/u19:0+ext4-rsv-conversion08:16:081
31566998764,16cyclictest31553-21cyclictest07:55:230
3157199869,35cyclictest31351-21netstat08:40:221
31571998615,26cyclictest32568-21timerwakeupswit07:05:321
31571998615,26cyclictest32568-21timerwakeupswit07:05:321
31573998562,16cyclictest17946-21fschecks_time08:00:172
31573998562,16cyclictest17946-21fschecks_time08:00:172
31573998549,18cyclictest181rcu_preempt12:20:292
31573998549,18cyclictest181rcu_preempt12:20:292
3157199854,37cyclictest16095-21/usr/sbin/munin07:55:051
3157199854,34cyclictest352-21runrttasks12:22:041
3157199854,34cyclictest352-21runrttasks12:22:041
31566998558,19cyclictest1498-21apt-key08:49:580
31566998558,19cyclictest1498-21apt-key08:49:580
3157199844,36cyclictest10408-21latency_hist10:04:581
3157199843,30cyclictest7681-21latency_hist07:29:581
3157199843,30cyclictest7681-21latency_hist07:29:581
3157199842,38cyclictest10363-21ntpq09:10:231
3157199842,37cyclictest880-21munin-node10:40:051
31566998434,31cyclictest26893-21ssh09:38:120
31573998366,11cyclictest21532-21df12:10:122
3157199834,37cyclictest4859-21modprobe08:59:551
3157199834,26cyclictest12828-21/usr/sbin/munin09:15:241
3157199834,26cyclictest11001-21ls07:39:551
3157199834,26cyclictest11001-21ls07:39:551
3157199833,42cyclictest20100-21grep08:05:301
3157199833,42cyclictest20100-21grep08:05:301
3157199833,35cyclictest21247-21if_err_eth008:10:181
31571998329,47cyclictest0-21swapper/111:39:571
31571998329,47cyclictest0-21swapper/111:39:571
3157199832,38cyclictest26320-21sort08:25:181
3157199832,38cyclictest26320-21sort08:25:181
3157199825,33cyclictest26285-21/usr/sbin/munin11:25:301
3157199824,39cyclictest15805-21cron07:54:551
3157199824,39cyclictest15805-21cron07:54:551
3157199824,38cyclictest13127-21mailstats11:55:281
3157199824,38cyclictest13127-21mailstats11:55:281
3157199824,34cyclictest2150-21mailstats12:31:241
3157199824,33cyclictest15594-21rm12:00:141
3157199823,37cyclictest11274-21/usr/sbin/munin11:00:291
3157199823,29cyclictest16358-21taskset11:08:131
3157199822,24cyclictest27766-21date09:39:591
31571998221,53cyclictest0-21swapper/107:20:321
31571998221,53cyclictest0-21swapper/107:20:321
31571998212,30cyclictest2739-21sort10:45:221
31566998251,22cyclictest12228-21grep07:40:320
31566998251,22cyclictest12228-21grep07:40:320
31566998247,26cyclictest352-21runrttasks12:05:260
3157199816,11cyclictest0-21swapper/109:25:091
3157199814,36cyclictest7998-21fschecks_count07:30:171
3157199814,25cyclictest10986-21apt10:59:551
3157199814,24cyclictest13367-21ntp_kernel_pll_07:45:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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