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2026-08-04 - 03:57
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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 Tue Aug 04, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8098212810,84sleep08155-21tune2fs18:51:060
93309912348,29cyclictest9321-21cyclictest22:14:370
93359911546,37cyclictest16488-21diskmemload21:34:471
787721137,23sleep10-21swapper/118:50:551
93359911046,35cyclictest352-21runrttasks00:06:521
8184210112,61sleep28220-21irqstats18:51:082
9330999956,34cyclictest20478-21cpu21:01:550
9330999956,34cyclictest20478-21cpu21:01:550
284192980,8sleep30-21swapper/323:55:593
9339999574,14cyclictest1-21systemd23:40:562
9339999571,18cyclictest8886-21sh21:36:022
9339999564,23cyclictest9321-21cyclictest21:50:412
9335998947,37cyclictest0-21swapper/122:45:381
9335998942,41cyclictest0-21swapper/122:46:171
9330998954,11cyclictest181rcu_preempt19:50:540
9339998861,19cyclictest14730-21apt-key19:10:412
9330998867,15cyclictest11729-21unixbench_multi00:21:140
9330998867,15cyclictest11729-21unixbench_multi00:21:140
933099883,69cyclictest26106-21ssh21:10:540
933099883,69cyclictest26106-21ssh21:10:540
9330998743,28cyclictest181rcu_preempt22:15:510
9339998669,10cyclictest17157-21sh20:56:022
9339998667,12cyclictest0-21swapper/219:26:152
933599864,73cyclictest22203-21ssh23:45:541
9335998642,37cyclictest19446-21fschecks_time23:41:011
9330998632,25cyclictest181rcu_preempt23:40:570
933999859,59cyclictest15080-21modprobe19:11:072
933599854,58cyclictest20377-21ssh21:01:451
933599854,58cyclictest20377-21ssh21:01:451
9335998545,33cyclictest16488-21diskmemload23:35:391
9335998545,33cyclictest16488-21diskmemload23:35:391
9330998571,10cyclictest16982-21kworker/u18:0-rpciod23:36:260
9335998451,23cyclictest17949-21fschecks_count21:51:031
9335998442,35cyclictest0-21swapper/122:26:041
933599843,70cyclictest0-21swapper/119:05:561
9330998460,16cyclictest16488-21diskmemload00:09:040
9330998435,13cyclictest181rcu_preempt20:21:110
9330998358,18cyclictest16488-21diskmemload22:25:420
9330998358,18cyclictest16488-21diskmemload22:25:420
9330998348,29cyclictest352-21runrttasks22:01:030
9330998346,30cyclictest0-21swapper/023:35:380
9330998346,30cyclictest0-21swapper/023:35:380
9339998224,36cyclictest21545-21apt-get22:50:532
9335998245,28cyclictest8364-21kworker/u18:1+nfsiod22:12:331
933599823,68cyclictest0-21swapper/120:10:511
933599823,67cyclictest0-21swapper/123:00:511
9330998262,14cyclictest11402-21latency_hist21:40:410
9339998156,17cyclictest1-21systemd23:47:562
933599814,67cyclictest0-21swapper/120:25:541
933599814,67cyclictest0-21swapper/120:25:541
933099816,45cyclictest21282-21grep21:56:080
933099816,45cyclictest21282-21grep21:56:080
9330998157,16cyclictest836-21systemd-run23:10:390
933099814,55cyclictest21964-21ssh22:51:520
9330998144,33cyclictest9321-21cyclictest19:28:280
9330998138,9cyclictest181rcu_preempt23:46:110
9339998065,9cyclictest170-21jbd2/mmcblk2p2-823:09:122
9339998055,15cyclictest15849-21kworker/u17:4-rpciod00:19:512
933599804,64cyclictest0-21swapper/119:15:491
9335997939,32cyclictest0-21swapper/122:20:541
9335997939,32cyclictest0-21swapper/122:20:541
933599793,69cyclictest0-21swapper/119:25:561
933599793,65cyclictest0-21swapper/119:35:531
933599792,72cyclictest0-21swapper/120:20:541
9335997919,53cyclictest22688-21wc22:52:101
933099794,40cyclictest16375-21sshd21:47:570
9339997857,15cyclictest15886-21threads20:51:142
9339997857,15cyclictest15886-21threads20:51:142
9335997863,8cyclictest0-21swapper/123:16:011
9335997856,15cyclictest9321-21cyclictest23:30:191
9335997854,18cyclictest17355-21latency_hist21:50:411
933599783,65cyclictest0-21swapper/123:55:501
9335997836,35cyclictest0-21swapper/122:05:411
9335997832,39cyclictest0-21swapper/100:11:071
9335997832,39cyclictest0-21swapper/100:11:071
933599782,6cyclictest0-21swapper/123:50:511
9330997854,17cyclictest28433-21fschecks_time23:55:590
9330997852,20cyclictest544-21cron22:45:380
832827812,39sleep30-21swapper/318:51:143
9339997763,9cyclictest9321-21cyclictest23:16:032
9335997756,15cyclictest300-21rs:main1
9335997752,17cyclictest5353-21latency_hist20:20:421
933599774,63cyclictest0-21swapper/121:10:521
933599774,63cyclictest0-21swapper/121:10:521
933599773,60cyclictest7915-21ls23:21:141
933599773,60cyclictest7915-21ls23:21:141
9335997734,35cyclictest0-21swapper/122:05:541
9335997734,35cyclictest0-21swapper/122:05:541
933599772,32cyclictest11736-21cpuspeed21:40:561
9330997758,13cyclictest9586-21rm23:25:050
9330997758,13cyclictest9586-21rm23:25:050
933099775,55cyclictest30335-21latency_hist23:05:410
9330997733,14cyclictest181rcu_preempt21:16:080
9330997726,8cyclictest0-21swapper/019:31:100
933099772,46cyclictest18421-21cpuspeed22:45:570
9339997661,10cyclictest9321-21cyclictest22:48:022
9339997654,12cyclictest15849-21kworker/u17:4-writeback00:22:132
9339997654,12cyclictest15849-21kworker/u17:4-writeback00:22:132
9339997652,15cyclictest30566-21threads19:56:122
9339997639,13cyclictest181rcu_preempt22:26:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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