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2025-12-09 - 15:14
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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 rack1slot2.osadl.org (updated Tue Dec 09, 2025 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
264427776,0sleep00-21swapper/006:17:220
240325756,0sleep20-21swapper/206:14:522
2851994949,0cyclictest14597-21md0_resync08:47:171
244224342,0sleep10-21swapper/106:15:151
2852994038,0cyclictest14596-21md1_resync08:47:162
274523627,0sleep30-21swapper/306:18:253
2851991212,0cyclictest23871-21snmpd11:16:321
339980,0migration/36851-21kthreadcore09:44:113
8315070,0irq/26-0000:00:0-21swapper/311:19:153
8315070,0irq/26-0000:00:0-21swapper/311:12:063
8315070,0irq/26-0000:00:0-21swapper/308:34:083
329970,0watchdog/321849-21gltestperf11:14:033
329970,0watchdog/313034-21ntpq09:09:113
29925070,0irq/32-eth0-rx-0-21swapper/308:43:473
8315060,0irq/26-0000:00:9779-21perl07:29:073
8315060,0irq/26-0000:00:6352-21munin-node07:49:033
8315060,0irq/26-0000:00:4547-21awk09:04:113
8315060,0irq/26-0000:00:40012sleep308:46:173
8315060,0irq/26-0000:00:3945-21perl08:09:043
8315060,0irq/26-0000:00:28556-21kthreadcore09:39:093
8315060,0irq/26-0000:00:28298-21head08:04:063
8315060,0irq/26-0000:00:27574-21ntp_kernel_err10:14:113
8315060,0irq/26-0000:00:2298-21perl07:24:063
8315060,0irq/26-0000:00:22794-21cut09:34:113
8315060,0irq/26-0000:00:22740-21wc07:34:153
8315060,0irq/26-0000:00:22740-21wc07:34:153
8315060,0irq/26-0000:00:20698-21ssh08:54:293
8315060,0irq/26-0000:00:1822-21timerwakeupswit09:59:173
8315060,0irq/26-0000:00:15496-21iostat_ios11:29:073
8315060,0irq/26-0000:00:134872sleep307:53:513
8315060,0irq/26-0000:00:12677-21cut09:29:103
8315060,0irq/26-0000:00:1008-21seq07:20:283
8315060,0irq/26-0000:00:0-21swapper/310:41:503
8315060,0irq/26-0000:00:0-21swapper/310:24:123
8315060,0irq/26-0000:00:0-21swapper/310:04:113
8315060,0irq/26-0000:00:0-21swapper/309:14:433
8315060,0irq/26-0000:00:0-21swapper/308:29:233
8315060,0irq/26-0000:00:0-21swapper/308:21:003
8315060,0irq/26-0000:00:0-21swapper/307:09:073
8315060,0irq/26-0000:00:0-21swapper/307:04:103
8315060,0irq/26-0000:00:0-21swapper/306:19:173
4160,0ktimersoftd/00-21swapper/007:52:310
4160,0ktimersoftd/00-21swapper/006:50:050
339960,0migration/36274-21sh11:40:113
339960,0migration/332497-21runrttasks06:38:563
339960,0migration/315302-21sh10:44:313
329960,0watchdog/330887-21kthreadcore10:59:113
329960,0watchdog/325600-21diskstats06:34:083
329960,0watchdog/30-21swapper/311:44:033
329960,0watchdog/30-21swapper/308:24:353
29935060,0irq/33-eth0-tx-23871-21snmpd06:35:410
29935060,0irq/33-eth0-tx-0-21swapper/007:05:460
29925060,0irq/32-eth0-rx-0-21swapper/311:34:143
29925060,0irq/32-eth0-rx-0-21swapper/309:56:383
29925060,0irq/32-eth0-rx-0-21swapper/309:49:343
29925060,0irq/32-eth0-rx-0-21swapper/308:59:003
29925060,0irq/32-eth0-rx-0-21swapper/308:49:123
28529966,0cyclictest0-21swapper/208:54:102
28529960,0cyclictest0-21swapper/210:07:192
28519965,0cyclictest17943-21aten_r1power_po06:29:041
28519960,0cyclictest0-21swapper/110:33:541
28519960,0cyclictest0-21swapper/110:29:101
28519960,0cyclictest0-21swapper/110:29:101
28519960,0cyclictest0-21swapper/107:28:391
28509960,0cyclictest0-21swapper/008:30:210
19160,0ktimersoftd/10-21swapper/106:25:261
169960,0watchdog/10-21swapper/108:52:391
149960,0migration/07816-21taskset09:27:040
149960,0migration/07303-21sh11:43:080
149960,0migration/032304-21kernelversion09:04:080
149960,0migration/025406-21ntp_offset07:14:120
149960,0migration/023649-21kthreadcore08:39:100
149960,0migration/019583-21sh11:10:320
149960,0migration/016187-21sh10:47:270
8315050,0irq/26-0000:00:8233-21perl06:44:083
8315050,0irq/26-0000:00:32407-21ssh09:23:593
8315050,0irq/26-0000:00:29329-21kthreadcore07:39:113
8315050,0irq/26-0000:00:28154-21memory06:54:103
8315050,0irq/26-0000:00:24932-21if_err_eth1.209:19:083
8315050,0irq/26-0000:00:24527-21sshd06:29:213
8315050,0irq/26-0000:00:10599-21aten_r1power_cu08:14:023
8315050,0irq/26-0000:00:0-21swapper/310:49:303
8315050,0irq/26-0000:00:0-21swapper/307:44:023
8315050,0irq/26-0000:00:0-21swapper/307:13:593
8315050,0irq/26-0000:00:0-21swapper/306:59:283
8315050,0irq/26-0000:00:0-21swapper/306:48:533
8315050,0irq/26-0000:00:0-21swapper/306:23:563
4150,0ktimersoftd/00-21swapper/009:38:180
4150,0ktimersoftd/00-21swapper/006:29:260
339950,0migration/36012-21runrttasks11:24:033
339950,0migration/331872-21kthreadcore10:19:083
339950,0migration/321384-21sh10:29:163
339950,0migration/321384-21sh10:29:163
339950,0migration/321317-21fschecks_count07:59:063
339950,0migration/319094-21smart_sda10:09:153
29935050,0irq/33-eth0-tx-32512-21munin-node06:39:110
29935050,0irq/33-eth0-tx-0-21swapper/211:03:082
29935050,0irq/33-eth0-tx-0-21swapper/007:59:130
29935050,0irq/33-eth0-tx-0-21swapper/007:45:540
29935050,0irq/33-eth0-tx-0-21swapper/007:19:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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