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2025-10-19 - 23:43
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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 50 highest latencies:
System rack3slot3.osadl.org (updated Sun Oct 19, 2025 12:46:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12250960irq/42-ahci0-21swapper/507:05:187
12250960irq/42-ahci0-21swapper/107:09:011
3066350910irq/52-eth0-rx-0-21swapper/807:05:2710
3066350910irq/52-eth0-rx-0-21swapper/407:05:296
12250910irq/42-ahci0-21swapper/207:08:394
3066350890irq/52-eth0-rx-0-21swapper/707:05:489
12250890irq/42-ahci0-21swapper/307:06:505
3066350880irq/52-eth0-rx-0-21swapper/1107:07:263
3088428077sleep90-21swapper/907:09:2211
3057527463sleep100-21swapper/1007:05:592
3071827058sleep00-21swapper/007:07:500
3066626555sleep60-21swapper/607:07:088
31079993028cyclictest0-21swapper/1110:28:433
31079992611cyclictest184072sleep1108:16:443
3103599210cyclictest0-21swapper/010:22:040
3107999200cyclictest0-21swapper/1108:08:223
3107999190cyclictest0-21swapper/1109:21:573
3103599190cyclictest0-21swapper/009:24:360
3107699181cyclictest3066350irq/52-eth0-rx-09:14:162
3107699181cyclictest23792chrt11:36:292
3107699181cyclictest125772chrt10:21:572
3107699181cyclictest124050irq/18-i801_smb11:20:332
3107699181cyclictest12250irq/42-ahci08:53:392
3107699181cyclictest12250irq/42-ahci08:17:542
31075991816cyclictest21604-21taskset07:37:3711
3107599181cyclictest0-21swapper/911:52:0811
31074991816cyclictest4212-21memory10:10:2310
31074991816cyclictest3091-21diskstats07:15:1410
31074991816cyclictest27491-21snmp_rack3slot911:26:1510
31074991816cyclictest23925-21snmp_rack3slot908:25:1610
31074991816cyclictest23446-21snmp_rack3slot907:40:1610
31074991816cyclictest20262-21snmp_rack3slot909:50:1210
31074991816cyclictest1878-21snmp_easybox.os09:25:1510
31074991816cyclictest16607-21snmp_rack3slot909:45:1210
31074991816cyclictest13004-21irqstats07:25:2210
31074991816cyclictest11726-21df_inode12:35:1410
31074991816cyclictest11520-21snmp_rack3slot908:51:2310
31074991816cyclictest10322-21perl09:35:1610
31072991816cyclictest11221-21qemu-kvm08:09:448
3104999180cyclictest0-21swapper/210:45:254
31079991715cyclictest2645-21snmp_rack3slot909:25:163
3107999170cyclictest0-21swapper/1108:22:343
3107999170cyclictest0-21swapper/1107:30:403
31076991716cyclictest123062sleep1008:55:112
3107699171cyclictest0-21swapper/1008:45:132
3107699171cyclictest0-21swapper/1007:51:502
3107699170cyclictest97832sleep1011:47:292
3107699170cyclictest93142sleep1011:01:032
3107699170cyclictest88742chrt10:16:082
3107699170cyclictest83982sleep1009:31:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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