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2023-01-28 - 08:29

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

Latency plot of system in rack #d, slot #2
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 100 highest latencies:
System rackdslot2.osadl.org (updated Sat Jan 28, 2023 00:46:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2344823290,8sleep00-21swapper/019:05:300
705521740,8sleep22435699cyclictest00:15:172
705521740,8sleep22435699cyclictest00:15:172
1339911170,46ptp4l401ktimersoftd/319:07:163
238152781,18sleep20-21swapper/219:06:432
2392427354,9sleep10-21swapper/119:08:071
88722660,2sleep20-21swapper/219:45:192
24357996632,10cyclictest41-21ksoftirqd/322:45:193
24357996121,8cyclictest41-21ksoftirqd/321:15:173
2435599610,27cyclictest1440-21sed00:05:001
2435799595,8cyclictest41-21ksoftirqd/322:05:153
24356995949,5cyclictest33-21ksoftirqd/223:25:152
24357995727,9cyclictest41-21ksoftirqd/300:15:143
24357995727,9cyclictest41-21ksoftirqd/300:15:143
24357995727,10cyclictest41-21ksoftirqd/319:15:133
24357995726,5cyclictest41-21ksoftirqd/320:35:113
2435799564,8cyclictest401ktimersoftd/320:30:003
24357995627,10cyclictest41-21ksoftirqd/320:10:293
2435799562,6cyclictest401ktimersoftd/319:35:153
2435799560,8cyclictest401ktimersoftd/322:35:173
2435599569,20cyclictest23675-21irqrtprio20:15:221
2435799553,9cyclictest401ktimersoftd/319:10:273
24357995524,9cyclictest41-21ksoftirqd/320:20:153
24357995524,9cyclictest41-21ksoftirqd/320:20:143
24357995524,10cyclictest41-21ksoftirqd/320:05:163
2435799550,9cyclictest401ktimersoftd/321:45:163
2435799550,7cyclictest401ktimersoftd/319:50:003
24354995526,8cyclictest9-21ksoftirqd/019:40:190
133991550,1ptp4l391rcuc/321:03:203
2435799547,9cyclictest41-21ksoftirqd/323:40:003
2435799544,7cyclictest401ktimersoftd/319:25:153
2435799543,8cyclictest401ktimersoftd/323:00:313
2435799543,8cyclictest401ktimersoftd/323:00:313
2435799543,8cyclictest401ktimersoftd/300:35:143
2435799543,7cyclictest401ktimersoftd/300:00:003
2435799543,6cyclictest401ktimersoftd/322:20:313
2435799543,6cyclictest401ktimersoftd/321:10:273
2435799540,10cyclictest401ktimersoftd/323:05:313
24356995441,8cyclictest33-21ksoftirqd/219:40:112
2435799533,8cyclictest41-21ksoftirqd/322:25:133
2435799533,7cyclictest401ktimersoftd/321:50:143
2435799532,8cyclictest401ktimersoftd/322:50:253
2435799532,8cyclictest401ktimersoftd/322:30:093
2435799532,8cyclictest401ktimersoftd/321:35:003
2435799532,8cyclictest401ktimersoftd/300:00:263
2435799532,6cyclictest401ktimersoftd/322:40:153
24357995323,10cyclictest41-21ksoftirqd/321:40:293
24357995323,10cyclictest41-21ksoftirqd/321:40:283
2435799530,9cyclictest401ktimersoftd/320:30:163
2435799530,7cyclictest401ktimersoftd/323:45:013
2435799523,8cyclictest401ktimersoftd/300:25:333
2435799523,7cyclictest401ktimersoftd/321:55:293
24357995224,9cyclictest41-21ksoftirqd/319:45:023
2435799516,8cyclictest41-21ksoftirqd/321:20:163
2435799516,4cyclictest41-21ksoftirqd/322:15:293
2435799514,7cyclictest401ktimersoftd/300:10:243
2435799513,7cyclictest401ktimersoftd/323:20:173
2435799512,8cyclictest401ktimersoftd/320:15:213
2435799512,7cyclictest41-21ksoftirqd/323:00:003
2435799512,7cyclictest401ktimersoftd/322:10:243
2435799512,6cyclictest41-21ksoftirqd/300:05:223
24357995122,10cyclictest41-21ksoftirqd/323:15:333
2435799510,8cyclictest401ktimersoftd/319:35:003
2435799510,6cyclictest401ktimersoftd/321:05:393
24356995134,4cyclictest33-21ksoftirqd/200:35:002
2435799504,7cyclictest41-21ksoftirqd/319:55:003
2435799502,7cyclictest401ktimersoftd/323:10:123
2435799501,8cyclictest401ktimersoftd/321:35:143
2435799501,7cyclictest401ktimersoftd/322:05:003
2435799500,7cyclictest401ktimersoftd/320:45:183
24356995032,8cyclictest33-21ksoftirqd/219:35:212
2435799494,6cyclictest401ktimersoftd/319:55:133
2435799491,6cyclictest41-21ksoftirqd/320:00:013
2435799491,6cyclictest401ktimersoftd/300:20:143
2435799491,6cyclictest401ktimersoftd/300:20:143
24356994932,4cyclictest33-21ksoftirqd/219:30:012
2435599490,22cyclictest1274-21snmpd22:25:211
2435799486,7cyclictest41-21ksoftirqd/320:50:263
2435799481,6cyclictest401ktimersoftd/319:20:263
2435799480,7cyclictest401ktimersoftd/321:25:303
2435799474,8cyclictest41-21ksoftirqd/320:55:333
2435599473,23cyclictest16757-21unixbench_multi23:25:351
2435499473,4cyclictest121rcu_preempt20:50:260
24356994636,5cyclictest33-21ksoftirqd/220:20:132
24356994636,5cyclictest33-21ksoftirqd/220:20:122
24356994621,13cyclictest33-21ksoftirqd/223:40:012
2435599465,25cyclictest5331-21cpuspeed_turbos21:55:151
2435499463,3cyclictest121rcu_preempt19:50:280
24354994633,6cyclictest9-21ksoftirqd/022:30:090
2435799456,8cyclictest41-21ksoftirqd/300:30:293
2435799454,6cyclictest41-21ksoftirqd/323:45:123
2435799453,9cyclictest41-21ksoftirqd/323:50:243
2435799452,7cyclictest41-21ksoftirqd/323:30:013
24356994538,4cyclictest33-21ksoftirqd/200:10:002
24356994532,7cyclictest33-21ksoftirqd/223:05:122
24356994532,11cyclictest33-21ksoftirqd/221:15:342
24356994532,10cyclictest33-21ksoftirqd/221:05:382
24356994531,4cyclictest33-21ksoftirqd/220:25:292
24356994513,4cyclictest33-21ksoftirqd/222:00:002
2435499450,4cyclictest121rcu_preempt21:20:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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