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2023-06-06 - 04:52

x86 Intel Atom E3845 @1910 MHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, slot #4
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Up99 -i200 -h400 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 50 highest latencies:
System rackdslot4.osadl.org (updated Tue Jun 06, 2023 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1354321320,6sleep32225999cyclictest22:16:483
1299911130,4ptp4l401ktimersoftd/319:05:513
199552830,4sleep11258-21lldpd21:20:371
199552830,4sleep11258-21lldpd21:20:361
218652826,14sleep00-21swapper/019:08:410
2187128058,10sleep10-21swapper/119:08:461
129991770,2ptp4l10435-21kworker/3:221:11:243
313312720,8sleep22225899cyclictest20:35:312
223162660,3sleep30-21swapper/323:45:263
129991630,2ptp4l401ktimersoftd/323:16:213
129991630,2ptp4l401ktimersoftd/320:42:193
129991630,1ptp4l401ktimersoftd/322:29:183
129991620,2ptp4l401ktimersoftd/320:21:103
56498610,7rtkit-daemon1242-21snmpd19:07:122
129991610,2ptp4l401ktimersoftd/320:55:003
129991600,1ptp4l401ktimersoftd/323:05:123
22257995948,6cyclictest25-21ksoftirqd/100:35:191
129991590,2ptp4l401ktimersoftd/322:54:343
129991590,1ptp4l401ktimersoftd/320:04:503
129991590,1ptp4l401ktimersoftd/319:17:333
129991580,1ptp4l401ktimersoftd/322:12:473
129991570,1ptp4l401ktimersoftd/319:22:413
129991560,1ptp4l401ktimersoftd/322:49:253
129991550,2ptp4l64-21kswapd000:09:063
22259995446,5cyclictest41-21ksoftirqd/320:55:143
129991520,3ptp4l1242-21snmpd00:37:573
22257994943,4cyclictest25-21ksoftirqd/100:30:001
22259994840,5cyclictest41-21ksoftirqd/319:25:183
129991470,1ptp4l401ktimersoftd/319:51:173
129991460,1ptp4l401ktimersoftd/322:02:553
129991460,1ptp4l401ktimersoftd/321:52:513
129991460,1ptp4l401ktimersoftd/321:08:263
22257994539,4cyclictest25-21ksoftirqd/122:55:311
22257994539,4cyclictest25-21ksoftirqd/122:30:301
22257994539,4cyclictest25-21ksoftirqd/122:30:301
22256994538,4cyclictest9-21ksoftirqd/020:32:210
22256994538,4cyclictest9-21ksoftirqd/020:10:240
129991450,1ptp4l401ktimersoftd/321:39:333
22257994438,4cyclictest25-21ksoftirqd/120:30:321
22257994437,4cyclictest25-21ksoftirqd/121:45:311
22256994435,3cyclictest9-21ksoftirqd/019:50:240
22256994427,6cyclictest9-21ksoftirqd/021:39:220
129991440,1ptp4l401ktimersoftd/323:28:443
129991440,1ptp4l401ktimersoftd/322:21:383
283412430,4sleep22225899cyclictest19:20:312
22257994337,4cyclictest25-21ksoftirqd/123:05:231
22257994337,4cyclictest25-21ksoftirqd/122:15:221
22257994337,4cyclictest25-21ksoftirqd/122:00:371
22257994337,4cyclictest25-21ksoftirqd/121:10:261
22257994337,4cyclictest25-21ksoftirqd/121:00:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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