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2026-05-10 - 00:54
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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
Characteristics of the 792 highest latencies:
System rackcslot2.osadl.org (updated Sat May 09, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3004127058,8sleep10-21swapper/107:06:311
2985726646,8sleep00-21swapper/007:04:350
134572460,2sleep13045799cyclictest10:34:121
3045799389,1cyclictest91rcu_preempt07:19:121
30457993811,2cyclictest91rcu_preempt10:45:241
30457993727,2cyclictest24-21ksoftirqd/109:24:441
30457993530,4cyclictest27873-21apache_accesses09:29:101
30457993430,3cyclictest14842-21apache_accesses11:19:091
30457993330,2cyclictest28827-21ssh12:19:131
30457993330,2cyclictest26282-21apache_processe10:09:121
30457993330,2cyclictest1084-21irqstats08:39:131
30457993329,3cyclictest32350-21/usr/sbin/munin10:59:121
30457993325,8cyclictest24-21ksoftirqd/109:09:461
30457993230,1cyclictest30928-21ntp_states11:39:161
30457993229,2cyclictest7211-21df_inode12:34:111
30457993229,2cyclictest6119-21ssh12:32:371
30457993229,2cyclictest24298-21apache_processe12:14:091
30457993229,2cyclictest16500-21ssh09:55:161
30457993229,2cyclictest11961-21diskmemload11:07:381
30457993228,3cyclictest7058-21ntp_states08:54:151
30457993228,3cyclictest32100-21df12:24:111
30457993228,3cyclictest30773-21fschecks_time07:09:121
30457993228,2cyclictest19360-21ssh12:07:081
30457993129,1cyclictest7534-21df11:09:091
30457993129,1cyclictest12591-21ntp_states07:44:161
30457993128,3cyclictest11961-21diskmemload10:02:301
30457993128,2cyclictest30063-21apache_accesses10:14:091
30457993128,2cyclictest24594-21users08:14:201
30457993128,2cyclictest19498-21apache_processe08:04:121
30457993128,2cyclictest11961-21diskmemload10:57:151
30457993128,2cyclictest0-21swapper/109:36:331
30457993127,3cyclictest11269-21expr09:49:101
30457993127,3cyclictest0-21swapper/111:34:101
30457993127,3cyclictest0-21swapper/107:54:371
30457993123,5cyclictest24-21ksoftirqd/110:22:331
30456993130,0cyclictest7-21ksoftirqd/009:23:590
30457993028,2cyclictest11961-21diskmemload11:14:201
30457993028,1cyclictest25253-21apache_accesses08:19:101
30457993027,3cyclictest0-21swapper/109:19:181
30457993027,2cyclictest2292-21ntp_states11:44:151
30457993027,2cyclictest21066-21latency12:09:141
30457993027,2cyclictest11961-21diskmemload09:18:061
30457993027,2cyclictest0-21swapper/111:54:191
30457993027,2cyclictest0-21swapper/109:44:141
3045799298,4cyclictest91rcu_preempt07:34:001
30457992927,2cyclictest11961-21diskmemload12:02:271
30457992926,2cyclictest5794-21irqstats11:49:151
30457992926,2cyclictest25633-21timerwakeupswit10:49:181
30457992926,2cyclictest24775-21rm10:06:051
30457992926,2cyclictest17846-21fschecks_count07:59:121
30457992926,2cyclictest0-21swapper/108:34:121
30457992923,5cyclictest0-21swapper/111:30:151
30457992920,8cyclictest10707-21ssh10:29:471
30457992918,8cyclictest9527-21grep08:59:191
30456992927,1cyclictest7-21ksoftirqd/007:14:180
30457992826,2cyclictest0-21swapper/110:28:231
30457992826,2cyclictest0-21swapper/109:41:141
30457992826,2cyclictest0-21swapper/109:04:001
30457992812,13cyclictest0-21swapper/107:39:121
30456992828,0cyclictest0-21swapper/010:50:380
3045799277,5cyclictest0-21swapper/110:42:031
3045799277,16cyclictest0-21swapper/107:24:101
30457992724,3cyclictest0-21swapper/108:45:161
30457992724,2cyclictest27236-21cat08:24:121
30457992724,2cyclictest11961-21diskmemload11:25:261
30457992723,3cyclictest1367-21seq07:14:591
30457992714,6cyclictest21671-21fschecks_count08:09:121
30457992622,3cyclictest150992sleep107:50:011
30457992521,3cyclictest6444-21cat07:29:161
30456992523,1cyclictest7-21ksoftirqd/007:43:580
30456992523,1cyclictest7-21ksoftirqd/007:23:590
30456992510,7cyclictest0-21swapper/010:07:200
30456992421,1cyclictest7-21ksoftirqd/010:32:020
3045699241,3cyclictest91rcu_preempt09:59:140
3045699241,22cyclictest0-21swapper/012:35:320
30456992411,5cyclictest0-21swapper/009:39:070
30456992410,7cyclictest0-21swapper/008:02:160
30456992410,6cyclictest0-21swapper/009:49:180
30456992410,6cyclictest0-21swapper/009:29:110
30456992410,2cyclictest0-21swapper/010:48:370
30456992410,0cyclictest0-21swapper/011:19:420
30456992410,0cyclictest0-21swapper/009:57:540
30456992322,0cyclictest0-21swapper/011:15:320
30456992322,0cyclictest0-21swapper/007:25:490
3045699232,13cyclictest29849-21/usr/sbin/munin08:29:160
30456992319,3cyclictest7917-21apache211:13:280
30456992310,6cyclictest0-21swapper/011:03:350
3045699222,1cyclictest91rcu_preempt12:15:370
30456992221,1cyclictest7-21ksoftirqd/010:36:060
30456992221,0cyclictest7-21ksoftirqd/008:54:150
30456992219,2cyclictest7-21ksoftirqd/010:09:470
30456992219,2cyclictest7-21ksoftirqd/009:10:420
30456992218,3cyclictest7910-21apache212:23:450
30456992211,5cyclictest11961-21diskmemload11:54:370
3045699220,1cyclictest91rcu_preempt08:06:230
30457992111,5cyclictest0-21swapper/108:49:121
3045699217,7cyclictest3068-21munin-run12:28:590
3045699216,3cyclictest0-21swapper/009:34:100
3045699216,13cyclictest0-21swapper/010:54:160
3045699212,0cyclictest91rcu_preempt12:09:130
30456992119,2cyclictest7-21ksoftirqd/012:05:390
30456992119,1cyclictest7-21ksoftirqd/011:39:110
30456992118,3cyclictest7910-21apache209:47:420
30456992117,3cyclictest0-21swapper/012:02:470
30456992117,2cyclictest7-21ksoftirqd/009:03:590
30456992110,6cyclictest0-21swapper/011:35:140
30456992110,11cyclictest0-21swapper/010:17:570
3045699205,7cyclictest0-21swapper/008:19:100
3045699203,9cyclictest0-21swapper/007:09:160
3045699203,5cyclictest91rcu_preempt07:54:180
30456992020,0cyclictest0-21swapper/011:28:040
30456992016,3cyclictest0-21swapper/012:29:230
30456992015,3cyclictest7-21ksoftirqd/007:44:110
30456992013,3cyclictest7-21ksoftirqd/009:27:010
3045699201,2cyclictest91rcu_preempt10:21:590
30456992011,4cyclictest1199-21runrttasks07:37:440
3045699200,2cyclictest91rcu_preempt08:24:120
2540422010,0sleep00-21swapper/011:32:540
30457991914,3cyclictest29065-21runrttasks08:29:031
3045699195,8cyclictest0-21swapper/011:04:090
30456991915,1cyclictest91rcu_preempt11:48:340
30456991910,1cyclictest0-21swapper/010:24:200
3045699190,4cyclictest91rcu_preempt08:39:170
2229221910,0sleep00-21swapper/008:09:180
3045699185,5cyclictest0-21swapper/011:49:110
3045699182,3cyclictest91rcu_preempt07:29:110
30456991810,5cyclictest0-21swapper/008:34:110
30456991810,3cyclictest22987-21kworker/0:007:52:210
30456991810,3cyclictest0-21swapper/008:14:170
3045699172,13cyclictest0-21swapper/009:04:170
3045699171,2cyclictest91rcu_preempt09:15:260
30456991710,5cyclictest0-21swapper/010:40:140
30456991612,2cyclictest7-21ksoftirqd/008:52:140
3045699140,4cyclictest7-21ksoftirqd/008:48:400
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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