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2026-03-14 - 22:43
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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 Mar 14, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2645323340,19sleep20-21swapper/207:00:362
27779991142,34cyclictest18142-21latency_hist10:25:190
27779991142,34cyclictest18142-21latency_hist10:25:190
27779991135,53cyclictest28623-21latency_hist12:30:180
27779991135,53cyclictest28623-21latency_hist12:30:180
27779991093,33cyclictest1491-21unixbench_singl09:55:530
277799910932,10cyclictest0-21swapper/011:30:330
27779991083,33cyclictest7591-21grep11:00:380
27779991074,40cyclictest28831-21fschecks_time11:35:380
27779991074,40cyclictest28831-21fschecks_time11:35:380
277799910718,19cyclictest0-21swapper/008:55:360
27779991063,34cyclictest31076-21cat10:45:390
27779991063,27cyclictest4020-21/usr/sbin/munin10:00:440
277799910552,46cyclictest30581-21ssh10:45:190
277799910552,46cyclictest30581-21ssh10:45:190
277799910540,58cyclictest0-21swapper/008:40:160
27779991053,36cyclictest25720-21grep10:35:500
3150021040,7sleep20-21swapper/210:45:502
277859910413,47cyclictest2267-21diskmemload10:25:371
27779991043,32cyclictest27639-21latency_hist07:05:200
27779991043,32cyclictest12171-21idleruntime-cro10:15:160
27779991043,32cyclictest12171-21idleruntime-cro10:15:160
27779991043,29cyclictest8544-21ntpq11:55:450
277799910431,23cyclictest26969-21cstates09:45:310
277799910431,23cyclictest26969-21cstates09:45:310
27779991033,36cyclictest31904-21fschecks_time07:15:380
27779991024,31cyclictest5622-21/usr/sbin/munin07:35:340
277799910231,8cyclictest0-21swapper/012:07:480
27779991013,36cyclictest8727-21cpuspeed09:15:330
27779991013,36cyclictest8727-21cpuspeed09:15:330
27779991013,32cyclictest15349-21latency_hist10:20:190
277799910130,63cyclictest0-21swapper/007:25:190
277799910130,63cyclictest0-21swapper/007:25:190
27779991012,40cyclictest898-21/usr/sbin/munin09:00:420
27779991004,36cyclictest352-21runrttasks11:14:330
277799910039,53cyclictest0-21swapper/012:10:360
277799910039,53cyclictest0-21swapper/012:10:360
27779991003,35cyclictest27679-21grep08:40:500
27779991003,33cyclictest17471-21rm11:16:010
27779991003,32cyclictest19892-21grep11:21:330
27779991003,28cyclictest6658-21sshd11:52:340
277799910032,60cyclictest30699-21wc08:50:470
277799910030,8cyclictest0-21swapper/012:00:450
64102990,7sleep10-21swapper/110:05:241
64102990,7sleep10-21swapper/110:05:241
2777999994,22cyclictest4641-21ssh10:55:400
2777999993,37cyclictest22941-21fschecks_time11:25:540
2777999993,37cyclictest22941-21fschecks_time11:25:540
2777999993,29cyclictest5491-21latency_hist09:10:190
2777999993,29cyclictest20597-21sendmail_mailst12:15:500
27779999929,9cyclictest0-21swapper/009:31:130
2777999992,38cyclictest25767-21kworker/u17:2+xprtiod10:30:290
2777999992,34cyclictest7169-21ssh10:05:470
2777999992,34cyclictest7169-21ssh10:05:470
2777999984,39cyclictest11272-21grep07:50:490
2777999984,39cyclictest11272-21grep07:50:490
2777999984,34cyclictest20177-21latency_hist08:20:180
27779999835,55cyclictest0-21swapper/009:10:430
2777999983,33cyclictest24580-21/usr/sbin/munin09:40:480
2777999983,31cyclictest10263-21/usr/sbin/munin11:05:420
27779999832,8cyclictest0-21swapper/009:20:370
2777999983,24cyclictest12334-21chrt07:55:290
2777999982,40cyclictest21267-21chrt10:29:590
27779999823,13cyclictest0-21swapper/012:31:220
27779999814,29cyclictest32549-21latency_hist09:55:180
2777999973,36cyclictest17543-21ls08:10:420
2777999973,34cyclictest1252-21/usr/sbin/munin10:50:400
2777999973,34cyclictest1252-21/usr/sbin/munin10:50:400
27779999729,9cyclictest0-21swapper/008:05:500
27779999727,9cyclictest0-21swapper/011:40:320
2777999972,34cyclictest23077-21fschecks_count12:20:370
27785999630,40cyclictest0-21swapper/111:25:161
2777999964,31cyclictest9065-21/usr/sbin/munin07:46:450
2777999963,32cyclictest30919-21grep07:10:550
2777999963,31cyclictest4690-21unin-run11:50:160
2777999963,31cyclictest4690-21unin-run11:50:160
2777999963,31cyclictest3877-21latency_hist07:30:180
2777999962,38cyclictest21309-21grep08:20:520
2777999962,31cyclictest24556-21grep08:30:520
2777999954,34cyclictest22964-21unixbench_singl08:25:530
2777999954,34cyclictest22964-21unixbench_singl08:25:530
2777999954,29cyclictest8587-21latency_hist07:45:190
2777999953,35cyclictest21659-21/usr/sbin/munin09:36:470
2777999953,32cyclictest17406-21sed09:30:180
2777999952,32cyclictest29943-21sort08:50:180
27785999466,19cyclictest24684-21/usr/sbin/munin10:35:471
2777999944,33cyclictest3989-21/usr/sbin/munin07:30:520
2777999943,36cyclictest28023-21sort07:05:320
2777999942,28cyclictest14881-21grep08:00:550
2687929218,41sleep10-21swapper/107:00:571
2778599892,82cyclictest0-21swapper/112:31:041
27789998858,10cyclictest181rcu_preempt12:05:512
2778599872,72cyclictest0-21swapper/109:15:311
2778599872,72cyclictest0-21swapper/109:15:311
27785998723,32cyclictest352-21runrttasks09:01:091
27789998651,7cyclictest181rcu_preempt11:45:482
27789998651,7cyclictest181rcu_preempt11:45:482
27785998648,31cyclictest803-21sendmail-mta09:20:271
2778599863,78cyclictest0-21swapper/111:10:291
27789998549,18cyclictest181rcu_preempt09:22:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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