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2026-04-16 - 09:18
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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 highest latencies:
System rackcslot2.osadl.org (updated Thu Apr 16, 2026 00:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1815521350,2sleep0353699cyclictest21:09:270
312027157,9sleep10-21swapper/119:06:441
155602710,1sleep015559-21sed21:49:270
303526956,8sleep00-21swapper/019:05:500
242172680,0sleep10-21swapper/122:47:551
278432650,0sleep10-21swapper/121:23:161
3537993734,2cyclictest26797-21diskstats20:09:221
3537993533,1cyclictest28370-21apache_accesses23:39:191
3537993532,2cyclictest32473-21cstates22:14:221
3537993532,2cyclictest32374-21df_inode23:44:211
3537993532,2cyclictest1717-21diskstats00:34:221
3537993432,1cyclictest11107-21memory23:59:231
3537993431,2cyclictest26612-21runrttasks22:50:211
3537993431,2cyclictest18391-21ntpq23:24:251
3537993431,2cyclictest15577-21diskstats21:04:231
3537993431,2cyclictest1218-21ssh00:34:021
3537993431,2cyclictest0-21swapper/120:23:021
3537993430,3cyclictest17114-21diskmemload22:09:301
3537993430,3cyclictest17114-21diskmemload22:08:401
3537993411,18cyclictest17114-21diskmemload21:35:021
3537993331,2cyclictest0-21swapper/121:10:531
3537993229,3cyclictest17114-21diskmemload22:22:151
3537993229,2cyclictest30093-21chrt20:17:081
3537993229,2cyclictest15161-21watchprog-snmpd21:03:551
3537993226,5cyclictest30239-21ssh21:25:381
3537993221,10cyclictest28571-21grep22:54:211
3537993219,10cyclictest7432-21/usr/sbin/munin23:09:231
3537993130,1cyclictest0-21swapper/123:50:211
3537993129,2cyclictest17114-21diskmemload23:29:581
3537993129,2cyclictest0-21swapper/120:56:291
3537993128,2cyclictest4615-21unixbench_multi23:04:291
3537993128,2cyclictest22023-21ssh00:17:081
3537993128,2cyclictest0-21swapper/122:35:421
3537993128,2cyclictest0-21swapper/121:57:321
3537993128,2cyclictest0-21swapper/119:09:291
3537993125,5cyclictest0-21swapper/122:30:071
3537993124,6cyclictest10654-21apache_accesses23:14:201
3537993112,17cyclictest16838-21ssh21:52:031
3537993110,5cyclictest91rcu_preempt00:11:271
3537993028,2cyclictest25008-21ssh00:20:331
3537993028,2cyclictest0-21swapper/119:33:241
3537993028,1cyclictest0-21swapper/121:29:221
3537993027,2cyclictest10973-21smartctl21:44:221
3537993027,2cyclictest0-21swapper/119:49:211
3537993026,4cyclictest0-21swapper/122:01:051
3537993026,3cyclictest0-21swapper/123:54:261
3537993025,4cyclictest0-21swapper/100:24:241
3537993018,11cyclictest0-21swapper/120:49:201
3537993013,14cyclictest0-21swapper/120:34:281
353799299,17cyclictest0-21swapper/119:19:261
3537992927,2cyclictest0-21swapper/100:04:231
3537992927,1cyclictest2140-21df_inode20:29:221
3537992925,3cyclictest6550-21ntp_states20:39:261
3537992923,5cyclictest727-21/usr/sbin/munin20:24:261
3537992923,5cyclictest17792-21ssh22:39:121
3537992920,8cyclictest22745-21sh21:15:051
3537992920,8cyclictest0-21swapper/120:44:301
3537992917,12cyclictest0-21swapper/123:34:191
3537992826,2cyclictest0-21swapper/121:40:461
3537992826,2cyclictest0-21swapper/119:47:231
3537992825,2cyclictest165732sleep119:41:331
3537992822,5cyclictest15122-21/usr/sbin/munin23:19:271
3537992819,9cyclictest0-21swapper/119:34:201
3537992810,14cyclictest0-21swapper/119:54:211
3537992725,2cyclictest0-21swapper/122:59:131
3537992725,1cyclictest5475-21apache_processe19:14:201
3537992725,1cyclictest22755-21apache_processe19:59:201
3537992719,7cyclictest0-21swapper/120:04:221
3537992623,2cyclictest17114-21diskmemload22:24:481
3536992610,6cyclictest0-21swapper/022:48:050
3537992521,3cyclictest0-21swapper/119:24:271
3536992522,2cyclictest0-21swapper/022:24:240
3536992423,1cyclictest28969-21apache221:40:120
3536992420,2cyclictest1199-21runrttasks20:51:240
3536992411,8cyclictest0-21swapper/021:20:230
3536992310,6cyclictest0-21swapper/000:20:100
353699230,22cyclictest0-21swapper/022:30:510
353699225,9cyclictest17114-21diskmemload22:04:110
3536992218,3cyclictest802-21apache221:02:330
3536992217,4cyclictest16743-21ssh22:37:200
3536992215,6cyclictest28324-21cron20:14:090
353699213,13cyclictest0-21swapper/023:09:280
3536992119,1cyclictest636-21nscd22:14:070
3536992118,2cyclictest947-21sendmail-mta23:20:430
3536992116,4cyclictest28969-21apache200:32:330
3536992116,4cyclictest0-21swapper/022:44:040
3536992110,4cyclictest0-21swapper/023:55:040
3536992110,4cyclictest0-21swapper/023:14:210
3536992110,3cyclictest0-21swapper/022:49:190
3536992110,3cyclictest0-21swapper/021:24:260
226472210,0sleep022648-21sh21:14:510
353699205,7cyclictest0-21swapper/020:24:220
3536992010,8cyclictest0-21swapper/022:19:560
3536992010,4cyclictest0-21swapper/020:34:270
3536992010,4cyclictest0-21swapper/020:29:220
3536992010,3cyclictest0-21swapper/019:44:200
3536992010,2cyclictest0-21swapper/023:04:260
251222200,1sleep00-21swapper/023:34:200
694221910,1sleep00-21swapper/019:16:190
353699194,14cyclictest0-21swapper/020:47:060
353699193,11cyclictest0-21swapper/021:44:240
353699192,10cyclictest0-21swapper/022:59:220
3536991917,2cyclictest0-21swapper/000:11:580
3536991917,1cyclictest17949-21/usr/sbin/munin21:54:230
3536991916,2cyclictest28851-21http_loadtime20:14:230
3536991912,3cyclictest100250irq/107-eth1-rx23:32:560
3536991910,8cyclictest0-21swapper/019:34:300
3536991910,5cyclictest0-21swapper/021:35:150
3536991910,5cyclictest0-21swapper/000:26:400
3536991910,4cyclictest0-21swapper/023:50:190
3536991910,4cyclictest0-21swapper/023:45:140
3536991910,4cyclictest0-21swapper/023:39:190
3536991910,4cyclictest0-21swapper/022:57:040
3536991910,2cyclictest0-21swapper/000:01:240
353699190,7cyclictest0-21swapper/019:29:210
353699190,13cyclictest0-21swapper/019:39:310
353699185,6cyclictest0-21swapper/021:59:200
3536991816,1cyclictest100250irq/107-eth1-rx00:34:400
3536991811,5cyclictest17623-21ssh23:24:200
3536991810,4cyclictest0-21swapper/022:14:190
3536991810,4cyclictest0-21swapper/021:29:440
3536991810,3cyclictest0-21swapper/000:04:190
3536991710,1cyclictest0-21swapper/019:19:350
353699161,7cyclictest0-21swapper/020:54:290
353699161,4cyclictest0-21swapper/019:59:280
3536991611,5cyclictest0-21swapper/020:07:320
3536991610,5cyclictest0-21swapper/020:39:220
3536991610,2cyclictest0-21swapper/021:04:210
3536991610,2cyclictest0-21swapper/019:25:390
3536991610,2cyclictest0-21swapper/000:14:200
3536991610,1cyclictest0-21swapper/019:49:200
3536991510,1cyclictest30477-21/usr/sbin/munin20:19:290
489821410,0sleep00-21swapper/019:10:020
3536991413,0cyclictest28991-21apache219:54:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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