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2022-08-19 - 12:31

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 Fri Aug 19, 2022 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1339911830,6ptp4l401ktimersoftd/319:09:223
554981030,16rtkit-daemon0-21swapper/219:05:462
52212750,2sleep00-21swapper/021:00:120
1618727152,8sleep10-21swapper/119:05:091
133991710,5ptp4l401ktimersoftd/319:10:023
133991690,2ptp4l401ktimersoftd/300:38:393
133991660,2ptp4l401ktimersoftd/320:40:263
181512654,49sleep00-21swapper/019:08:270
133991620,1ptp4l401ktimersoftd/321:10:263
260952610,5sleep026097-21unixbench_multi00:00:330
248852520,2sleep10-21swapper/100:00:181
13212510,1sleep00-21swapper/019:40:280
18558994928,18cyclictest9-21ksoftirqd/019:56:330
133991480,2ptp4l13929-21ls23:35:263
133991480,1ptp4l401ktimersoftd/319:30:333
18559994530,12cyclictest25-21ksoftirqd/121:51:471
133991450,1ptp4l401ktimersoftd/320:53:583
133991440,1ptp4l401ktimersoftd/320:09:293
1855899435,5cyclictest0-21swapper/019:10:140
1855899433,5cyclictest0-21swapper/023:35:150
133991430,1ptp4l401ktimersoftd/322:36:153
1855899424,4cyclictest0-21swapper/019:30:140
1855899423,6cyclictest0-21swapper/021:25:150
1855899423,6cyclictest0-21swapper/020:00:120
18558994213,4cyclictest30274-21sed00:10:230
133991420,1ptp4l401ktimersoftd/322:10:333
133991420,1ptp4l401ktimersoftd/319:25:243
18559994124,14cyclictest25-21ksoftirqd/100:30:001
1855899415,5cyclictest0-21swapper/023:00:130
1855899414,5cyclictest0-21swapper/020:10:210
1855899414,4cyclictest0-21swapper/021:50:150
1855899413,5cyclictest0-21swapper/021:20:130
133991410,1ptp4l401ktimersoftd/300:05:173
1855899404,5cyclictest0-21swapper/021:35:130
1855899404,5cyclictest0-21swapper/021:35:130
1855899404,5cyclictest0-21swapper/019:25:130
1855899402,6cyclictest0-21swapper/000:15:140
18561993922,5cyclictest41-21ksoftirqd/300:26:213
18560993934,3cyclictest33-21ksoftirqd/223:50:322
18560993932,4cyclictest33-21ksoftirqd/200:15:162
1855999390,4cyclictest9588-21cpuspeed20:00:151
1855999390,4cyclictest4020-21irqrtprio22:05:221
1855999390,4cyclictest27518-21/usr/sbin/munin22:55:221
1855999390,4cyclictest27518-21/usr/sbin/munin22:55:221
1855999390,4cyclictest23747-21fschecks_count19:20:191
1855999390,3cyclictest22596-21df_abs23:55:171
1855899393,5cyclictest0-21swapper/020:25:140
1855899392,14cyclictest19902-21tr22:40:150
1855899390,7cyclictest11113-21cut22:20:260
18561993831,4cyclictest1269-21cron00:20:003
1856099381,3cyclictest121rcu_preempt20:40:322
18559993817,18cyclictest204-21systemd-journal00:20:001
1855999381,33cyclictest19308-21tune2fs20:20:251
1855999381,33cyclictest19308-21tune2fs20:20:251
1855999380,5cyclictest22445-21sed19:15:311
1855999380,5cyclictest21708-21chrt22:44:151
1855999380,4cyclictest2512-21kernelversion00:20:261
1855999380,4cyclictest2512-21kernelversion00:20:251
1855999380,4cyclictest0-21swapper/121:49:221
1855899382,8cyclictest30980-21apt-get21:55:130
18558993816,19cyclictest9-21ksoftirqd/022:47:070
18558993813,4cyclictest23221-21/usr/sbin/munin19:20:190
18558993812,4cyclictest2279-21mailstats22:00:280
18558993812,4cyclictest10917-21expr23:30:160
133991380,1ptp4l401ktimersoftd/321:08:333
18561993731,4cyclictest41-21ksoftirqd/320:00:593
18560993731,4cyclictest33-21ksoftirqd/219:40:012
18560993730,4cyclictest33-21ksoftirqd/223:00:002
18560993730,4cyclictest33-21ksoftirqd/223:00:002
18560993730,4cyclictest33-21ksoftirqd/222:30:142
1856099370,4cyclictest121rcu_preempt20:25:232
1855999379,25cyclictest31812-21kernelversion21:55:221
1855999373,27cyclictest29042-21apt-get23:00:141
1855999372,28cyclictest27930-21apt-get19:30:131
1855999370,4cyclictest21567-21fschecks_count20:25:191
1855999370,4cyclictest12887-21/usr/sbin/munin20:05:261
1855899379,4cyclictest18014-21cut23:45:200
1855899379,3cyclictest8864-21wc23:25:200
1855899377,5cyclictest3925-21switchtime19:45:290
1855899373,5cyclictest0-21swapper/020:35:150
18558993710,4cyclictest8821-21bc00:35:170
133991370,13ptp4l401ktimersoftd/320:15:333
133991370,13ptp4l401ktimersoftd/320:15:323
18561993630,3cyclictest41-21ksoftirqd/323:13:563
18560993630,4cyclictest33-21ksoftirqd/200:25:002
18560993630,4cyclictest33-21ksoftirqd/200:25:002
18560993629,4cyclictest33-21ksoftirqd/221:33:592
1855999364,25cyclictest17075-21apt-get21:25:141
18559993629,4cyclictest25-21ksoftirqd/119:50:341
1855999362,31cyclictest30651-21uniq19:35:201
1855999360,5cyclictest19315-21taskset21:30:111
1855999360,4cyclictest25139-21irqrtprio22:50:221
1855999360,4cyclictest22084-21dpkg22:45:141
1855999360,4cyclictest21481-21sed23:50:341
1855999360,4cyclictest13545-21switchtime21:15:311
1855999360,3cyclictest9483-21cat00:35:261
1855899363,5cyclictest0-21swapper/023:40:160
18558993630,3cyclictest9-21ksoftirqd/020:06:030
1855899362,6cyclictest0-21swapper/019:50:140
18558993610,4cyclictest8365-21cat00:35:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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