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2026-07-26 - 04:01
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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 Sun Jul 26, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
269121297,15sleep00-21swapper/018:54:570
2943991113,29cyclictest352-21runrttasks21:19:470
2943991095,29cyclictest3614-21/usr/sbin/munin20:36:480
2943991094,32cyclictest28405-21sh21:26:280
29439910656,45cyclictest1644-21kworker/u17:1+xprtiod21:41:130
2943991054,25cyclictest352-21runrttasks00:15:190
2943991054,25cyclictest352-21runrttasks00:15:190
2943991052,35cyclictest5552-21latency19:01:430
2943991043,96cyclictest0-21swapper/023:11:300
2943991034,28cyclictest28920-21latency_hist22:21:170
2943991022,26cyclictest4563-21fschecks_time00:22:250
2943991014,38cyclictest6352-21ntp_states22:36:450
2943991013,46cyclictest7364-21head23:31:530
2943991013,36cyclictest16882-21grep19:36:360
29439910044,49cyclictest0-21swapper/018:56:500
29439910040,53cyclictest0-21swapper/021:22:430
29439910038,54cyclictest0-21swapper/022:41:540
29439910036,59cyclictest0-21swapper/020:21:420
2943991002,31cyclictest13526-21cat21:01:420
2943991002,31cyclictest13526-21cat21:01:420
294399994,33cyclictest15538-21apt-get23:46:540
294399994,33cyclictest15538-21apt-get23:46:540
294399994,29cyclictest30050-21modprobe00:11:140
294399993,48cyclictest20795-21sed22:06:450
294399993,30cyclictest25906-21systemctl22:16:160
294399993,23cyclictest16592-21apt-get21:06:570
2943999842,49cyclictest0-21swapper/022:51:170
2943999839,52cyclictest161ktimers/022:51:330
2943999839,52cyclictest161ktimers/022:51:330
294399983,39cyclictest12280-21grep21:51:550
294399983,37cyclictest1737-21modprobe20:31:150
294399983,30cyclictest24749-21/usr/sbin/munin20:01:330
294399983,30cyclictest24749-21/usr/sbin/munin20:01:330
2943999821,7cyclictest0-21swapper/022:26:350
192329812,59sleep21924-21memory18:51:492
2958999757,33cyclictest5738-21ntp_kernel_pll_20:41:452
2958999757,33cyclictest5738-21ntp_kernel_pll_20:41:452
2958999738,44cyclictest7888-21kworker/u17:0-rpciod00:09:302
294399974,21cyclictest14117-21ssh23:43:590
294399974,21cyclictest14117-21ssh23:43:590
294399973,34cyclictest352-21runrttasks21:56:470
294399973,34cyclictest352-21runrttasks21:56:470
294399973,33cyclictest5833-21ntp_kernel_err21:42:020
294399973,33cyclictest5833-21ntp_kernel_err21:42:020
294399972,32cyclictest10087-21rm20:56:190
294399964,35cyclictest17431-21fschecks_count22:01:390
294399964,33cyclictest19883-21latency_hist19:46:190
294399964,31cyclictest352-21runrttasks00:03:500
294399963,37cyclictest556-21grep23:21:390
294399963,34cyclictest11856-21/usr/sbin/munin19:21:270
294399963,34cyclictest11856-21/usr/sbin/munin19:21:270
294399963,33cyclictest5915-21cut20:41:500
294399963,33cyclictest5915-21cut20:41:500
294399963,32cyclictest30171-21/usr/sbin/munin22:21:520
294399963,29cyclictest22208-21mailstats23:56:480
294399963,25cyclictest21125-21/usr/sbin/munin23:01:410
294399963,25cyclictest21125-21/usr/sbin/munin23:01:410
294399963,14cyclictest29714-21apt-get23:16:290
294399962,21cyclictest8632-21/usr/sbin/munin19:12:490
2958999533,31cyclictest0-21swapper/219:07:202
294999952,58cyclictest8650-21apt-get19:11:431
294399954,34cyclictest31379-21sort21:31:270
294399954,32cyclictest19930-21/usr/sbin/munin19:46:440
294399954,31cyclictest7726-21grep20:46:520
294399953,33cyclictest15000-21latency_hist19:31:180
294399953,33cyclictest15000-21latency_hist19:31:180
294399953,30cyclictest21543-21/usr/sbin/munin19:51:340
2943999532,55cyclictest0-21swapper/020:01:190
294399952,36cyclictest26831-21sort20:06:420
294399952,22cyclictest21487-21ssh21:14:400
2943999517,28cyclictest10030-21rm23:36:490
2958999415,38cyclictest0-21swapper/200:11:422
2958999415,38cyclictest0-21swapper/200:11:422
2949999469,15cyclictest352-21runrttasks22:46:361
294399945,33cyclictest27997-21/usr/sbin/munin20:11:370
294399943,38cyclictest9248-21timerandwakeup20:51:510
294399943,38cyclictest9248-21timerandwakeup20:51:510
294399943,34cyclictest352-21runrttasks19:20:490
294399943,33cyclictest352-21runrttasks20:32:220
294399943,32cyclictest23951-21fschecks_count23:06:370
294399943,32cyclictest17927-21ssh22:56:360
294399943,30cyclictest18489-21/usr/sbin/munin23:51:510
294399938,28cyclictest9837-21diskmemload22:31:400
294399935,28cyclictest3539-21fschecks_count23:26:370
294399935,28cyclictest3539-21fschecks_count23:26:370
294399933,34cyclictest15087-21/usr/sbin/munin19:31:460
294399933,34cyclictest15087-21/usr/sbin/munin19:31:460
294399933,32cyclictest8175-21/usr/sbin/munin21:46:390
294399933,29cyclictest29902-21grep20:16:390
294399933,27cyclictest7428-21wc19:06:490
294399933,25cyclictest869-21/usr/sbin/munin00:16:380
2963999212,46cyclictest5221-21chrt21:41:353
2963999212,46cyclictest5221-21chrt21:41:353
2958999238,10cyclictest0-21swapper/218:56:382
295899913,78cyclictest0-21swapper/219:56:322
2958999052,33cyclictest2934-21cyclictest22:59:232
2949999023,22cyclictest10113-21seq21:49:101
2958998943,39cyclictest0-21swapper/200:21:142
2958998940,42cyclictest30395-21processes23:16:492
295899887,42cyclictest0-21swapper/220:14:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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