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2026-05-06 - 19:29
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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 May 06, 2026 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2673821439,99sleep126829-21timerwakeupswit06:57:291
2673821439,99sleep126829-21timerwakeupswit06:57:291
274119911961,51cyclictest0-21swapper/012:02:100
27411991053,27cyclictest0-21swapper/009:01:560
2592721057,71sleep30-21swapper/306:56:543
2592721057,71sleep30-21swapper/306:56:543
27411991047,17cyclictest27412-21latency_hist07:01:470
27411991047,17cyclictest27412-21latency_hist07:01:470
274209910359,32cyclictest0-21swapper/209:37:172
274119910327,9cyclictest15350irq/295-2188000.ethernet08:46:540
274119910327,9cyclictest15350irq/295-2188000.ethernet08:46:540
274119910247,48cyclictest27402-21cyclictest08:16:470
274119910247,48cyclictest27402-21cyclictest08:16:470
27411991022,41cyclictest17001-21taskset12:07:320
274119910148,45cyclictest0-21swapper/009:12:150
274209910056,37cyclictest11753-21ntp_kernel_pll_09:17:112
274209910056,37cyclictest11753-21ntp_kernel_pll_09:17:112
27411991003,25cyclictest32523-21/usr/sbin/munin09:52:060
27411991003,25cyclictest32523-21/usr/sbin/munin09:52:060
27411991003,22cyclictest30505-21sh11:36:530
27411991002,37cyclictest1001-21apt-get11:41:530
27411991002,37cyclictest1001-21apt-get11:41:530
27420999974,9cyclictest181rcu_preempt11:42:012
27420999974,9cyclictest181rcu_preempt11:42:012
27411999941,49cyclictest0-21swapper/012:26:440
27411999941,49cyclictest0-21swapper/012:26:440
2741199992,41cyclictest464-21cat10:46:590
27411999847,45cyclictest0-21swapper/008:46:460
2741199982,26cyclictest15855-21fschecks_time11:12:040
2741199982,26cyclictest15855-21fschecks_time11:12:040
27420999752,38cyclictest0-21swapper/212:07:172
27411999751,21cyclictest181rcu_preempt10:37:120
2741199973,41cyclictest3656-21taskset10:51:590
27411999732,58cyclictest0-21swapper/012:27:190
2741199973,21cyclictest1923-21latency_hist09:01:450
27411999647,43cyclictest1865-21diskmemload09:21:540
27411999639,52cyclictest0-21swapper/011:36:430
2741199962,23cyclictest352-21runrttasks12:18:430
2741199954,25cyclictest24872-21/usr/sbin/munin08:32:080
2741199953,22cyclictest10146-21fschecks_count11:57:040
2741199952,31cyclictest9765-21latency_hist11:56:450
27411999519,7cyclictest0-21swapper/010:02:040
104782950,6sleep00-21swapper/010:09:190
27415999469,16cyclictest19676-21snmpd10:37:201
2741199943,39cyclictest23102-21/usr/sbin/munin09:37:170
27411999428,59cyclictest0-21swapper/011:02:090
2741199942,38cyclictest20853-21apt-get10:26:540
2741199942,28cyclictest20115-21apt-get08:17:450
2741199942,28cyclictest20115-21apt-get08:17:450
2741199942,21cyclictest12502-21switchtime10:12:180
27415999351,34cyclictest0-21swapper/107:21:471
2741199933,33cyclictest32184-21timerwakeupswit08:52:180
2741199933,25cyclictest31846-21sendmail09:51:430
2741199932,39cyclictest17369-21fschecks_count09:27:040
27415999245,40cyclictest0-21swapper/112:21:421
27411999245,41cyclictest0-21swapper/010:32:200
2741199924,26cyclictest32743-21cat07:16:460
27411999235,51cyclictest15180-21sshd09:10:150
27411999235,51cyclictest15180-21sshd09:10:150
2741199923,28cyclictest26698-21/usr/sbin/munin09:42:110
2741199922,23cyclictest352-21runrttasks11:50:020
27411999221,7cyclictest0-21swapper/012:16:000
27411999214,33cyclictest20332-21diskstats09:32:030
27411999214,23cyclictest8199-21sh10:58:430
27411999212,27cyclictest19144-21ntp_kernel_pll_11:17:100
27415999147,7cyclictest181rcu_preempt12:30:511
2741199914,25cyclictest2691-21apt-get09:56:530
2741199912,22cyclictest27447-21latency_hist11:31:470
27411999118,22cyclictest11732-21apt-get07:51:540
27420999043,40cyclictest0-21swapper/208:42:192
2741199903,36cyclictest11355-21df09:17:010
2741199903,36cyclictest11355-21df09:17:010
2741199903,26cyclictest11627-21grep07:51:460
2741199903,25cyclictest22340-21ssh11:22:170
27411999023,7cyclictest0-21swapper/007:41:430
2741199902,23cyclictest5967-21/usr/sbin/munin07:32:170
27411999017,6cyclictest0-21swapper/008:02:140
27411999017,6cyclictest0-21swapper/008:02:140
2683229011,52sleep226911-21unixbench_singl06:57:302
2683229011,52sleep226911-21unixbench_singl06:57:302
27420998948,33cyclictest0-21swapper/212:21:462
27420998946,35cyclictest27939-21interrupts11:32:072
27415998928,55cyclictest0-21swapper/110:27:171
2741199894,29cyclictest20533-21latency_hist10:26:460
2741199893,22cyclictest16806-21cut08:07:050
27411998931,53cyclictest0-21swapper/010:21:450
27411998931,53cyclictest0-21swapper/010:21:450
2741199892,27cyclictest8947-21/usr/sbin/munin07:42:100
27411998921,7cyclictest0-21swapper/011:07:130
27420998850,32cyclictest0-21swapper/207:26:462
27420998842,40cyclictest1358-21timerwakeupswit10:47:192
27420998841,41cyclictest0-21swapper/209:12:192
2741599884,29cyclictest27022-21ssh12:25:101
2741599884,29cyclictest27022-21ssh12:25:101
2741599883,32cyclictest23666-21rm11:25:121
2741199883,22cyclictest13637-21idleruntime07:57:050
2741199883,22cyclictest13637-21idleruntime07:57:050
2741199882,26cyclictest1781-21awk07:21:430
2741199882,23cyclictest3895-21grep07:27:040
2741199882,23cyclictest3895-21grep07:27:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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