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2026-07-24 - 15:00
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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 Fri Jul 24, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5658212414,78sleep25706-21/usr/sbin/munin18:52:062
5658212414,78sleep25706-21/usr/sbin/munin18:52:062
64999911980,33cyclictest14072-21ssh22:46:231
6493991103,98cyclictest14091-21apt-get22:46:430
6499991052,50cyclictest22556-21ssh21:11:261
6499991013,45cyclictest5884-21runrttasks20:31:581
64999910040,8cyclictest0-21swapper/121:18:261
6499991003,36cyclictest28984-21fschecks_time21:21:461
64999910033,12cyclictest0-21swapper/120:12:001
649999983,38cyclictest9496-21unixbench_singl20:42:001
51032987,64sleep05151-21cstates18:51:430
51032987,64sleep05151-21cstates18:51:430
649999973,33cyclictest6500-21latency_hist18:56:281
649999973,33cyclictest6500-21latency_hist18:56:281
6499999728,17cyclictest0-21swapper/122:47:381
649399973,54cyclictest17495-21munin-run23:46:220
649999964,34cyclictest8265-21munin-node19:41:351
649999964,32cyclictest6277-21ssh22:31:581
6493999683,8cyclictest15350irq/295-2188000.ethernet23:21:520
649999953,38cyclictest15022-21latency_hist19:21:271
649999953,32cyclictest20100-21/usr/sbin/munin22:01:481
6499999446,41cyclictest0-21swapper/121:36:481
6499999446,41cyclictest0-21swapper/121:36:481
649999943,40cyclictest20488-21ssh23:51:231
649999943,40cyclictest20488-21ssh23:51:231
649999943,37cyclictest9636-21grep19:02:021
6493999467,19cyclictest13379-21latency_hist19:16:260
6502999374,13cyclictest19676-21snmpd20:01:252
649999934,38cyclictest11304-21latency_hist22:41:271
649999933,35cyclictest352-21runrttasks20:53:121
649999932,36cyclictest4465-21grep00:17:001
649999932,36cyclictest4465-21grep00:17:001
6502999250,35cyclictest0-21swapper/221:37:042
6502999250,35cyclictest0-21swapper/221:37:042
650299923,38cyclictest8798-21cut20:41:462
649999923,31cyclictest31681-21latency_hist22:21:271
649999923,31cyclictest31681-21latency_hist22:21:271
6493999263,19cyclictest29530-21latency_hist20:06:260
6493999263,19cyclictest29530-21latency_hist20:06:260
649999914,35cyclictest24094-21/usr/sbin/munin23:57:221
649999914,35cyclictest23233-21/usr/sbin/munin19:46:581
649999913,39cyclictest6674-21ssh00:21:461
649999913,39cyclictest6674-21ssh00:21:461
649999913,39cyclictest6674-21ssh00:21:461
649999913,38cyclictest25831-21grep19:52:011
649999913,34cyclictest3690-21/usr/sbin/munin20:26:351
6499999132,12cyclictest0-21swapper/121:16:261
6499999132,12cyclictest0-21swapper/121:16:261
649999912,35cyclictest21356-21latency_hist19:41:251
649999912,35cyclictest21356-21latency_hist19:41:251
649999912,31cyclictest17519-21/usr/sbin/munin22:51:451
649399913,68cyclictest19377-21apt21:06:230
649399913,68cyclictest19377-21apt21:06:230
649999903,40cyclictest20024-21latency_hist22:01:271
649999903,36cyclictest11729-21cat20:51:261
649999903,31cyclictest352-21runrttasks23:26:181
649999903,31cyclictest16891-21latency_hist21:56:411
649999902,35cyclictest13420-21grep19:16:261
6493999049,28cyclictest8432-21latency_hist20:41:270
6502998944,39cyclictest0-21swapper/200:08:422
649999896,41cyclictest29177-21kworker/u17:0+ext4-rsv-conversion23:17:401
649999893,39cyclictest31181-21latency_hist20:11:261
649999893,39cyclictest31181-21latency_hist20:11:261
649999893,35cyclictest486-21/usr/sbin/munin00:11:571
649999893,35cyclictest11477-21fschecks_count21:46:451
649999893,33cyclictest10346-21acpi19:06:361
649999893,28cyclictest15262-21cstates19:21:411
649999892,39cyclictest13993-21fschecks_time20:56:481
649999892,37cyclictest9967-21unixbench_singl23:32:001
6493998917,29cyclictest9345-21apt-get00:26:360
6502998853,24cyclictest11082-21grep20:47:002
650299883,40cyclictest12692-21diskmemload23:36:592
649999885,36cyclictest7841-21awk20:37:001
649999884,35cyclictest28778-21switchtime20:01:571
649999884,35cyclictest28778-21switchtime20:01:571
649999884,31cyclictest30324-21fschecks_time00:06:461
649999883,39cyclictest2260-21fschecks_count20:21:451
649999883,36cyclictest14790-21latency_hist23:41:271
649999882,35cyclictest16784-21/usr/sbin/munin19:26:551
649999882,35cyclictest16784-21/usr/sbin/munin19:26:551
649999882,29cyclictest29423-21/usr/sbin/munin23:11:541
6502998745,36cyclictest0-21swapper/222:56:462
650299873,37cyclictest12188-21/usr/sbin/munin20:52:402
650299872,60cyclictest14671-21apt-get22:46:432
649999874,33cyclictest28115-21unixbench_singl00:02:031
649999874,33cyclictest20494-21/usr/sbin/munin22:56:501
649999872,35cyclictest1808-21/usr/sbin/munin20:21:241
649999872,34cyclictest18389-21/usr/sbin/munin19:31:551
649999872,34cyclictest18389-21/usr/sbin/munin19:31:551
649999872,33cyclictest17750-21grep21:02:061
649999872,33cyclictest17750-21grep21:02:061
6502998640,38cyclictest0-21swapper/222:51:502
650299863,39cyclictest4275-21ssh23:22:502
650299863,38cyclictest26234-21unin-run19:56:252
649999864,36cyclictest8190-21/usr/sbin/munin21:41:581
649999863,37cyclictest21582-21cut23:52:541
649999863,37cyclictest21582-21cut23:52:541
649999863,36cyclictest303-21ssh22:21:571
649999863,35cyclictest27368-21unixbench_multi19:56:591
6502998567,10cyclictest11611-21idleruntime-cro23:36:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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