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2026-06-08 - 20:37
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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 08, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25441991173,78cyclictest30736-21apt-get07:14:561
25415991163,58cyclictest16089-21cstates09:25:250
25415991163,58cyclictest16089-21cstates09:25:250
25415991156,34cyclictest4012-21runrttasks10:52:520
254159911231,14cyclictest0-21swapper/011:14:530
254159911158,48cyclictest25393-21cyclictest12:15:460
254159911032,15cyclictest0-21swapper/010:44:320
25415991102,53cyclictest9065-21latency11:54:570
25415991102,53cyclictest9065-21latency11:54:570
254159910934,10cyclictest0-21swapper/009:10:050
254159910934,10cyclictest0-21swapper/009:10:050
25415991084,29cyclictest1796-21seq11:43:080
254159910831,14cyclictest0-21swapper/012:24:550
25415991073,40cyclictest18974-21grep09:29:500
254159910728,17cyclictest0-21swapper/009:50:030
254159910728,17cyclictest0-21swapper/009:50:030
254419910636,40cyclictest0-21swapper/110:30:051
254159910644,55cyclictest24533-21ssh11:26:360
25415991064,26cyclictest0-21swapper/006:59:470
25415991064,26cyclictest0-21swapper/006:59:470
254159910629,22cyclictest30732-21modprobe07:14:300
254159910629,22cyclictest30732-21modprobe07:14:300
254159910612,34cyclictest22132-21if_eth009:34:540
254159910533,12cyclictest0-21swapper/011:49:510
25415991052,43cyclictest20411-21cat08:19:540
254159910436,10cyclictest0-21swapper/011:31:040
25415991042,73cyclictest352-21runrttasks07:14:590
25415991042,37cyclictest16791-21acpi08:09:400
25415991042,26cyclictest5483-21cat11:49:340
25415991042,25cyclictest28867-21sshd07:06:370
24648210414,60sleep124731-21grep06:55:161
25415991033,42cyclictest27609-21cut09:44:330
25415991033,42cyclictest27609-21cut09:44:330
25415991033,36cyclictest16241-21/usr/sbin/munin10:19:510
25415991033,36cyclictest16241-21/usr/sbin/munin10:19:510
25415991023,37cyclictest2225-21/usr/sbin/munin07:24:580
25415991013,37cyclictest29679-21/usr/sbin/munin11:35:000
25415991013,37cyclictest29679-21/usr/sbin/munin11:35:000
25415991013,36cyclictest28820-21grep09:45:080
254159910133,13cyclictest0-21swapper/012:09:330
25441991004,80cyclictest25739-21runrttasks06:59:551
25441991004,80cyclictest25739-21runrttasks06:59:551
254159910039,54cyclictest0-21swapper/008:49:460
25415991003,34cyclictest25540-21latency_hist06:59:350
25415991003,22cyclictest10400-21/usr/sbin/munin10:09:450
254159910010,34cyclictest12797-21fschecks_time09:19:510
25453999981,12cyclictest17221-21ssh10:20:062
25453999981,12cyclictest17221-21ssh10:20:062
2541599995,42cyclictest32585-21apt-get07:19:450
2541599994,38cyclictest28156-21latency_hist10:39:320
2541599994,38cyclictest13575-21fschecks_time10:14:520
25415999934,14cyclictest3529-21rm09:04:400
2541599993,37cyclictest4890-21/usr/sbin/munin10:55:030
2541599993,37cyclictest28356-21fschecks_time08:44:530
2541599993,36cyclictest9644-21sed07:45:080
2541599993,35cyclictest18997-21ps08:15:020
25415999933,15cyclictest10407-21ssh09:15:050
25415999932,11cyclictest0-21swapper/011:59:580
2541599992,35cyclictest8430-21latency_hist07:44:330
25441999870,22cyclictest3576-21ssh09:04:461
2541599983,39cyclictest1-21systemd08:09:310
2541599983,37cyclictest5932-21needreboot07:34:560
2541599983,37cyclictest27970-21latency_hist08:44:330
2541599983,35cyclictest352-21runrttasks08:00:380
2541599983,35cyclictest19911-21/usr/sbin/munin11:19:590
25415999815,31cyclictest25723-21timerwakeupswit08:35:040
2541599974,35cyclictest3862-21/usr/sbin/munin07:30:010
2541599973,39cyclictest4908-21ntpq10:00:010
2541599973,36cyclictest21614-21/usr/sbin/munin08:25:080
2541599973,36cyclictest21614-21/usr/sbin/munin08:25:080
25453999674,15cyclictest28873-21ssh10:40:092
25441999634,38cyclictest0-21swapper/110:09:571
2541599963,35cyclictest16713-21latency_hist11:14:310
2541599963,32cyclictest10508-21fschecks_count07:49:500
2541599963,32cyclictest10508-21fschecks_count07:49:500
25453999566,21cyclictest19837-21latency_hist11:19:332
2541599954,32cyclictest31351-21cpu08:54:460
2541599944,35cyclictest352-21runrttasks10:09:200
2541599943,38cyclictest21881-21cron10:29:290
2541599942,23cyclictest32013-21ntp_states10:45:000
25415999412,28cyclictest12712-21timerandwakeup07:55:060
25415999412,28cyclictest12712-21timerandwakeup07:55:060
25453999364,21cyclictest11283-21unixbench_multi10:10:052
25453999264,20cyclictest26812-21sh11:31:042
25453999262,20cyclictest22171-21sh09:34:552
2544199927,76cyclictest87-21kswapd010:39:501
2541599923,35cyclictest24906-21munin-run10:34:300
2541599913,38cyclictest1711-21grep09:54:560
25441999064,18cyclictest32690-21diskmemload11:15:041
2544199903,63cyclictest16153-21ssh09:25:271
2544199903,63cyclictest16153-21ssh09:25:271
2541599903,33cyclictest13823-21latency_hist11:09:320
2541599903,33cyclictest13823-21latency_hist11:09:320
25415999017,15cyclictest0-21swapper/008:30:050
2407029024,39sleep30-21swapper/306:54:583
25441998945,39cyclictest25393-21cyclictest11:00:021
25453998865,16cyclictest32059-21threads07:15:512
25441998845,38cyclictest0-21swapper/112:04:291
25453998760,18cyclictest18467-21timerwakeupswit12:10:082
2527528715,45sleep225241-21munin-run06:59:332
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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